Form 10-Q - Quarterly report [Sections 13 or 15(d)]

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☒	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2024

☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

COMMISSION FILE NUMBER 001-36576

MARINUS PHARMACEUTICALS, INC.

(Exact name of registrant as specified in its charter)


Delaware		20-0198082
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)

5 Radnor Corporate Center, Suite 500

100 Matsonford Rd

Radnor, PA 19087

(Address of registrant’s principal executive offices, including zip code)

Registrant’s telephone number, including area code: (484) 801-4670

Securities registered pursuant to Section 12(b) of the Act:


Title of Each Class	Trading Symbol(s)	Name of Each Exchange on Which Registered
Common Stock, par value $0.001 per share	MRNS	Nasdaq Global Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. ⌧ Yes ☐ No.

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). ☒ Yes ☐ No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.


Large accelerated filer ☐	Accelerated filer	☐

Non-accelerated filer ☒	Smaller reporting company	☒

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ◻

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). ☐Yes ☒ No

The number of outstanding shares of the registrant’s common stock, par value $0.001 per share, as of November 5, 2024, was: 55,185,622.

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MARINUS PHARMACEUTICALS, INC. AND SUBSIDIARY

INDEX TO FORM 10-Q

FOR THE QUARTER ENDED SEPTEMBER 30, 2024

PART I – FINANCIAL INFORMATION
Item 1.	Consolidated Financial Statements (unaudited)
	Consolidated Balance Sheets as of September 30, 2024 and December 31, 2023	3
	Consolidated Statements of Operations and Comprehensive Loss for the three and nine months ended September 30, 2024 and 2023	4
	Consolidated Statements of Cash Flows for the nine months ended September 30, 2024 and 2023	5
	Consolidated Statements of Stockholders’ (Deficit) Equity for the three and nine months ended September 30, 2024 and 2023	6
	Notes to Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	27
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	49
Item 4.	Controls and Procedures	49

PART II – OTHER INFORMATION
Item 1.	Legal Proceedings	51
Item 1A.	Risk Factors	51
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	54
Item 3.	Defaults Upon Senior Securities	54
Item 4.	Mine Safety Disclosures	54
Item 5.	Other Information	54
Item 6.	Exhibits	55
	Signatures	56

Unless the context otherwise requires, all references in this Quarterly Report on Form 10-Q to the “Company,” “Marinus,” “we,” “us,” and “our” include Marinus Pharmaceuticals, Inc. and its wholly owned subsidiary, Marinus Pharmaceuticals Emerald Limited, an Ireland company.

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PART I

FINANCIAL INFORMATION

Item 1. Consolidated Financial Statements

MARINUS PHARMACEUTICALS, INC. AND SUBSIDIARY

CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share amounts)

(unaudited)



	September 30,		December 31,
	2024		2023
ASSETS
Current assets:
Cash and cash equivalents	$	42,184	$	120,572
Short-term investments		—		29,716
Accounts receivable, net		3,840		3,799
Inventory		6,717		2,413
Prepaid expenses and other current assets		4,660		8,746
Total current assets		57,401		165,246
Property and equipment, net		4,882		3,843
Other assets		1,341		1,819
Total assets	$	63,624	$	170,908
LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY
Current liabilities:
Accounts payable	$	3,707	$	4,003
Current portion of notes payable		13,475		11,551
Current portion of revenue interest financing payable		3,163		2,211
Accrued expenses		14,159		22,859
Total current liabilities		34,504		40,624
Notes payable, net of deferred financing costs		41,713		61,423
Revenue interest financing payable, net of deferred financing costs		36,039		33,766
Contract liabilities, net		18,108		17,545
Other long-term liabilities		—		785
Total liabilities		130,364		154,143
Stockholders’ (deficit) equity:
Common stock, $0.001 par value; 150,000,000 shares authorized, 55,192,929 issued and 55,185,622 outstanding at September 30, 2024 and 54,585,428 issued and 54,578,121 outstanding at December 31, 2023		55		55
Additional paid-in capital		603,853		588,656
Treasury stock at cost, 7,307 shares at September 30, 2024 and December 31, 2023		—		—
Accumulated other comprehensive loss		—		(20)
Accumulated deficit		(670,648)		(571,926)
Total stockholders’ (deficit) equity		(66,740)		16,765
Total liabilities and stockholders’ (deficit) equity	$	63,624	$	170,908

See accompanying notes to consolidated financial statements.

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MARINUS PHARMACEUTICALS, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(in thousands, except share and per share amounts)

(unaudited)


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023

Revenue:
Product revenue, net	$	8,468	$	5,429	$	23,928	$	13,010
Federal contract revenue		56		1,891		295		10,753
Collaboration revenue		17		18		53		36
Total revenue		8,541		7,338		24,276		23,799

Expenses:
Research and development		16,334		23,661		61,349		73,006
Selling, general and administrative		12,573		14,868		47,909		45,794
Restructuring Costs		—		—		1,950		—
Cost of product revenue		714		455		2,205		1,047
Total expenses		29,621		38,984		113,413		119,847
Loss from operations		(21,080)		(31,646)		(89,137)		(96,048)
Interest income		598		1,895		3,169		6,366
Interest expense		(3,843)		(4,242)		(12,806)		(12,597)
Other income, net		100		1,021		52		1,105
Loss before income taxes		(24,225)		(32,972)		(98,722)		(101,174)

Benefit for income taxes		—		—		—		1,538
Net loss applicable to common shareholders	$	(24,225)	$	(32,972)	$	(98,722)	$	(99,636)
Per share information:
Net loss per share of common stock—basic and diluted	$	(0.42)	$	(0.61)	$	(1.73)	$	(1.89)
Basic and diluted weighted average shares outstanding		57,229,229		53,920,109		57,049,038		52,755,114
Other comprehensive income:
Unrealized gain (loss) on available-for-sale securities		—		43		20		(71)
Total comprehensive loss	$	(24,225)	$	(32,929)	$	(98,702)	$	(99,707)

See accompanying notes to consolidated financial statements.

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MARINUS PHARMACEUTICALS, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)


	Nine Months Ended September 30,
	2024		2023
Cash flows from operating activities
Net loss	$	(98,722)	$	(99,636)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		405		426
Amortization of debt issuance costs		2,278		1,659
Accretion of revenue interest financing debt, net of cash paid		2,784		4,421
Amortization of discount on short-term investments		(149)		(995)
Stock-based compensation expense		14,940		11,638
Amortization of net contract asset/liability		(1,018)		(1,259)
Noncash lease expense		112		146
Noncash lease liability		567		300
Write off of fixed assets		—		61
Write off of right-of-use assets		757		—
Changes in operating assets and liabilities:
Net contract asset/liability		1,581		2,079
Prepaid expenses and other current assets, non-current assets, inventory and accounts receivable		(1,174)		(6,290)
Accounts payable and accrued expenses		(10,116)		(3,559)
Net cash used in operating activities		(87,755)		(91,009)
Cash flows from investing activities
Proceeds from sale of property and equipment		—		9
Maturities of short-term investments		29,885		17,000
Purchases of short-term investments		—		(51,995)
Purchases of property and equipment		(1,152)		(85)
Net cash provided by (used in) investing activities		28,733		(35,071)
Cash flows from financing activities
Proceeds from exercise of stock options		257		783
Prepayments of long-term debt, including financing costs		(19,623)		—
Other cash flows from financing activities		—		(737)
Proceeds from equity offerings, net of offering costs		—		25,920
Net cash (used in) provided by financing activities		(19,366)		25,966
Net decrease in cash and cash equivalents		(78,388)		(100,114)
Cash and cash equivalents—beginning of period		120,572		240,551
Cash and cash equivalents—end of period	$	42,184	$	140,437
Supplemental disclosure of cash flow information
Unrealized gain (loss) on short-term investments	$	20	$	(71)
Financing costs	$	—	$	97
Property and equipment in accounts payable	$	221	$	—
Cash paid for interest during the period	$	7,944	$	6,540
Cash paid for income taxes during the period	$	—	$	903

See accompanying notes to consolidated financial statements.

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MARINUS PHARMACEUTICALS, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF (DEFICIT) EQUITY

(in thousands)

(unaudited)


												Accumulated
	Series A						Additional					Other				Total
	Convertible Preferred Stock			Common Stock			Paid-in		Treasury Stock			Comprehensive		Accumulated		Stockholders’
	Shares	Amount		Shares	Amount		Capital		Shares	Amount		Income (Loss)		Deficit		(Deficit) Equity
Balance, December 31, 2022	4,300	$	4,043	49,642,767	$	50	$	542,428	7,307	$	—	$	—	$	(430,521)	$	116,000
Stock-based compensation expense	—		—	—		—		3,741	—		—		—		—		3,741
Net issuance of common stock in connection with the vesting of restricted stock	—		—	22,350		—		—	—		—		—		—		—
Unrealized gain on short-term investments	—		—	—		—		—	—		—		74		—		74
Net Loss	—		—	—		—		—	—		—		—		(34,730)		(34,730)
Balance, March 31, 2023	4,300	$	4,043	49,665,117	$	50	$	546,169	7,307	$	—		74	$	(465,251)	$	85,085
Stock-based compensation expense	—		—	—		—		3,891	—		—		—		—		3,891
Net issuance of common stock in connection with the vesting of restricted stock	—		—	11,625		—		—	—		—		—		—		—
Exercise of stock options	—		—	72,440		—		485	—		—		—		—		485
Conversion of convertible preferred stock into common	(4,300)		(4,043)	860,000		1		4,042	—		—		—		—		—
Unrealized loss on short-term investments	—		—	—		—		—	—		—		(188)		—		(188)
Net loss	—		—	—		—		—	—		—		—		(31,934)		(31,934)
Balance, June 30, 2023	—	$	—	50,609,182	$	51	$	554,587	7,307	$	—		(114)	$	(497,185)	$	57,339
Stock-based compensation expense	—		—	—		—		4,006	—		—		—		—		4,006
Exercise of stock options	—		—	50,338		—		298	—		—		—		—		298
Net issuance of common stock in connection with the vesting of restricted stock	—		—	224,170		—		—	—		—		—		—		—
Issuance of common stock in connection with at-the-market facility offering (average price of $7.17 per share), net of expenses of $529	—		—	3,689,800		4		25,819	—		—		—		—		25,823
Unrealized gain on short-term investments	—		—	—		—		—	—		—		43		—		43
Net income	—		—	—		—		—	—		—		—		(32,972)		(32,972)
Balance, September 30, 2023	—	$	—	54,573,490	$	55	$	584,710	7,307		—	$	(71)		(530,157)		54,537


Balance, December 31, 2023	—	$	—	54,578,121	$	55	$	588,656	7,307	$	—	$	(20)	$	(571,926)	$	16,765
Stock-based compensation expense	—		—	—		—		5,193	—		—		—		—		5,193
Exercise of stock options	—		—	57,665		—		257	—		—		—		—		257
Net issuance of common stock in connection with the vesting of restricted stock	—		—	295,256		—		—	—		—		—		—		—
Unrealized gain on short-term investments	—		—	—		—		—	—		—		20		—		20
Net loss	—		—	—		—		—	—		—		—		(38,669)		(38,669)
Balance, March 31, 2024	—	$	—	54,931,042	$	55	$	594,106	7,307	$	—	$	—	$	(610,595)	$	(16,434)
Stock-based compensation expense	—		—	—		—		4,917	—		—		—		—		4,917
Net issuance of common stock in connection with the vesting of restricted stock	—		—	32,877		—		—	—		—		—		—		—
Net loss	—		—	—		—		—	—		—		—		(35,828)		(35,828)
Balance, June 30, 2024	—	$	—	54,963,919	$	55	$	599,023	7,307	$	—		—	$	(646,423)	$	(47,345)
Stock-based compensation expense	—		—	—		—		4,830	—		—		—		—		4,830
Net issuance of common stock in connection with the vesting of restricted stock	—		—	221,703		—		—	—		—		—		—		—
Net loss	—		—	—		—		—	—		—		—		(24,225)		(24,225)
Balance, September 30, 2024	—	$	—	55,185,622	$	55	$	603,853	7,307		—	$	—		(670,648)		(66,740)

See accompanying notes to consolidated financial statements.

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MARINUS PHARMACEUTICALS, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. Description of the Business and Liquidity

We are a commercial-stage pharmaceutical company dedicated to the development of innovative therapeutics for the treatment of seizure disorders, including rare genetic epilepsies and status epilepticus (SE). On March 18, 2022, the U.S. Food and Drug Administration (FDA) approved our new drug application (NDA) for the use of ZTALMY® (ganaxolone) oral suspension CV for the treatment of seizures associated with Cyclin-dependent Kinase-like 5 (CDKL5) Deficiency Disorder (CDD) in patients two years of age and older. ZTALMY, our first FDA approved product, became available for commercial sale and shipment in the third quarter of 2022. On July 28, 2023, the European Commission (EC) granted marketing authorization for ZTALMY for the adjunctive treatment of epileptic seizures associated with CDD in patients two to 17 years of age. ZTALMY may be continued in patients 18 years of age and older. We have an exclusive collaboration agreement with Orion Corporation (Orion) for European commercialization of ganaxolone for ZTALMY. Orion has prepared for the expected commercial launches of ZTALMY in select European countries, and they have informed us that they will be considering the outcome of our strategic alternatives review we announced on October 24, 2024 before committing to launch timing and further launch preparations. On July 18, 2024, we announced that the China National Medical Products Administration has approved ganaxolone oral suspension for the treatment of epileptic seizures in patients two years of age and older with CDD. We have a collaboration agreement with Tenacia Biotechnology (Shanghai) Co., Ltd. (Tenacia) for the commercialization of ganaxolone in Mainland China, Hong Kong, Macau and Taiwan.

On October 24, 2024, we announced top-line data from our Phase 3 trial in Tuberous Sclerosis Complex (TSC) (TrustTSC). TSC is a rare, multisystem genetic disorder caused by inherited mutations in the TSC1 gene or TSC2 gene. TSC is often characterized by non-cancerous tumors, skin abnormalities, and severe neurological manifestations including refractory seizures and neurodevelopmental delays. TSC is a leading cause of genetic epilepsy. The TrustTSC trial did not meet the primary endpoint of percent change in 28-day TSC-associated seizure frequency. As a result of the TrustTSC outcome, we discontinued further ganaxolone clinical development, other than activities required by the FDA and EMA specific to post-approval commitments of Ztalmy for CDD, and have taken additional steps to reduce costs, including an approximate 45% reduction in our workforce in the fourth quarter of 2024. We also commenced a process to explore strategic alternatives with the goal of maximizing value for our stockholders and engaged Barclays as an advisor to assist in our review of strategic alternatives. There can be no assurance that the exploration of strategic alternatives will result in any agreements or transactions, or as to the timing of any such agreements or transactions.

In June 2024, we announced top-line results from our Phase 3 RAISE trial of intravenous (IV) ganaxolone for the treatment of Refractory Status Epilepticus (RSE). Status Epilepticus (SE) is a life-threatening condition characterized by continuous, prolonged seizures or rapidly recurring seizures without intervening recovery of consciousness. If SE is not treated urgently, permanent neuronal damage may occur, which contributes to high rates of morbidity and mortality. Patients with SE who do not respond to first-line benzodiazepine treatment are classified as having Established Status Epilepticus (ESE) and those who then progress to and subsequently fail at least one second-line antiepileptic drug (AED) are classified as having RSE. The top-line results from RAISE showed that the trial met its first co-primary endpoint, a statistically significant proportion of patients had status epilepticus cessation within 30 minutes of initiating IV ganaxolone compared to placebo, but failed to achieve statistical significance on its second co-primary endpoint, the proportion of patients not progressing to IV anesthesia for 36 hours following initiation of IV ganaxolone compared to placebo. We continue to analyze the full RAISE dataset and are scheduled to meet with the FDA by the end of 2024 to discuss a potential path forward for IV ganaxolone in RSE.

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extrasynaptic GABA_A. This unique receptor binding profile may contribute to the anticonvulsant, antidepressant and anxiolytic effects shown by neuroactive steroids in animal models, clinical trials or both.

Liquidity

Since inception, we have incurred negative cash flows from our operations, and other than for the three months ended September 30, 2022 due to a one-time net gain from the sale of our Priority Review Voucher (PRV), we have incurred net losses. We incurred a Net loss of $98.7 million for the nine months ended September 30, 2024. There is no assurance that profitable operations will be achieved in the future, and if achieved, could be sustained on a continuing basis. Our accumulated deficit as of September 30, 2024 was $670.6 million, and we expect to incur substantial losses in future periods.

Management’s operating plan, which underlies the analysis of our ability to continue as a going concern, involves the estimation of the amount and timing of future cash inflows and outflows. Actual results could vary from the operating plan. We follow the provisions of Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 205-40, Presentation of Financial Statements—Going Concern, which requires management to assess our ability to continue as a going concern within one year after the date the financial statements are issued. We had Cash and cash equivalents of $42.2 million as of September 30, 2024. We believe that such amount is not sufficient to fund our operations for the one-year period after the date these financial statements are issued. As a result, there is substantial doubt about our ability to continue as a going concern through the one-year period from the date these financial statements are issued. Cost reduction activities were implemented in the second and fourth quarters of 2024, as further discussed in Note 13 and Note 14. As a result of the TrustTSC outcome announced in October 2024, we discontinued further ganaxolone clinical development, other than activities required by the FDA and EMA specific to post-approval commitments of Ztalmy for CDD, and have taken additional steps to reduce costs, including an approximate 45% reduction in our workforce in the fourth quarter of 2024. We also commenced a process to explore strategic alternatives with the goal of maximizing value for our stockholders and engaged Barclays as an advisor to assist in our review of strategic alternatives. There can be no assurance that the exploration of strategic alternatives will result in any agreements or transactions, or as to the timing of any such agreements or transactions.

2. Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited interim consolidated financial statements include the accounts of Marinus Pharmaceuticals, Inc. (a Delaware corporation) as well as the accounts of Marinus Pharmaceuticals Emerald Limited (an Ireland company incorporated in February 2021), a wholly owned subsidiary requiring consolidation. Marinus Pharmaceuticals Emerald Limited serves as a corporate presence in the European Union for regulatory purposes. The unaudited interim consolidated financial statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Accordingly, they do not include all information and disclosures necessary for a presentation of our financial position, results of operations and cash flows in conformity with generally accepted accounting principles in the U.S. (GAAP) for annual financial statements. In the opinion of management, these unaudited interim consolidated financial statements reflect all adjustments, consisting primarily of normal recurring accruals, necessary for a fair presentation of our financial position and results of operations and cash flows for the periods presented. The results of operations for interim periods are not necessarily indicative of the results for the full year. These unaudited interim consolidated financial statements should be read in conjunction with the audited financial statements for the year ended December 31, 2023 and accompanying notes thereto included in our Annual Report on Form 10-K filed with the SEC on March 5, 2024.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from such estimates.

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Product Revenue, net

We recognize ZTALMY revenue in accordance with ASC 606 – Revenue from contracts with customers. Our revenue recognition analysis consists of the following steps: (i) identification of the promised goods in the contract; (ii) determination of whether the promised goods are performance obligations, including whether they are capable of being distinct; (iii) measurement of the transaction price, including the constraint on variable consideration; (iv) allocation of the transaction price to the performance obligations; and (v) recognition of revenue as we satisfy each performance obligation.

Our first FDA approved product, ZTALMY, became available for commercial sale and shipment in the third quarter of 2022. We have three customers, one of which, Orsini Pharmaceutical Services, LLC (Orsini), a specialty pharmacy that dispenses ZTALMY directly to patients, represents approximately 98% of our ZTALMY revenue to date. Our contract with Orsini has a single performance obligation to deliver ZTALMY upon receipt of a purchase order, which is satisfied when Orsini receives ZTALMY. We recognize ZTALMY revenue at the point in time when control of ZTALMY is transferred to Orsini, which is upon delivery to Orsini. The transaction price that we recognize for ZTALMY revenue includes an estimate of variable consideration. Shipping and handling costs to Orsini are recorded as selling, general and administrative expenses. The components of variable consideration include:

Trade Discounts and Allowances. We provide contractual discounts, including incentive prompt payment discounts and chargebacks. Each of these potential discounts is recorded as a reduction of ZTALMY revenue and Accounts receivable in the period in which the related ZTALMY revenue is recognized. We estimate the amount of variable consideration for all discounts and allowances using the expected value method.

Product Returns and Recall. We provide for ZTALMY returns in accordance with our Return Good Policy. We estimate the amount of ZTALMY that may be returned using the expected value method, and we present this amount as a reduction of ZTALMY revenue in the period the related ZTALMY revenue is recognized. In the event of a recall, we will promptly notify Orsini and will reimburse Orsini for direct administrative expenses incurred in connection with the recall as well as the cost of replacement product.

Government Rebates. We are subject to discount obligations under state Medicaid programs, Medicare and the Tricare Retail Refund Program. We estimate reserves related to these discount programs and record these obligations in the same period the related revenue is recognized, resulting in a reduction of ZTALMY revenue.

Patient Assistance. We offer a voluntary co-pay patient assistance program intended to provide financial assistance to eligible patients with a prescription drug co-payment required by payors and coupon programs for cash payors. The calculation of the Current liability for this assistance is based on an estimate of claims and the cost per claim that we expect to receive associated with ZTALMY that has been recognized as Product revenue but remains in the distribution channel inventories at the end of each reporting period.

Federal Contract Revenue

We recognize Federal contract revenue from the BARDA Contract in the period in which the allowable research and development expenses are incurred, and receivables associated with this revenue are included within Accounts receivable, net on our interim consolidated balance sheets. This revenue is not within the scope of ASC 606 – Revenue from contracts with customers.

Collaboration and Licensing Revenue

We may enter into collaboration and licensing arrangements for research and development, manufacturing, and commercialization activities with counterparties for the development and commercialization of our product candidates. These arrangements may contain multiple components, such as (i) licenses, (ii) research and development activities, and (iii) the manufacturing of certain material. Payments pursuant to these arrangements may include non-refundable and

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refundable payments, payments upon the achievement of significant regulatory, development and commercial milestones, sales of product at certain agreed-upon amounts, and royalties on product sales. The amount of variable consideration is constrained until it is probable that the revenue is not at a significant risk of reversal in a future period.

In determining the appropriate amount of revenue to be recognized as we fulfill our obligations under a collaboration agreement, we perform the following steps: (i) identification of the promised goods or services in the contract; (ii) determination of whether the promised goods or services are performance obligations, including whether they are capable of being distinct; (iii) measurement of the transaction price, including the constraint on variable consideration; (iv) allocation of the transaction price to the performance obligations; and (v) recognition of revenue as we satisfy each performance obligation.

We must develop estimates and assumptions that require judgment to determine the underlying stand-alone selling price for each performance obligation, which determines how the transaction price is allocated among the performance obligations. The estimation of the stand-alone selling price may include such estimates as forecasted revenues and costs, development timelines, discount rates and probabilities of regulatory and commercial success. We also apply significant judgment when evaluating whether contractual obligations represent distinct performance obligations, allocating transaction price to performance obligations within a contract, determining when performance obligations have been met, assessing the recognition and future reversal of variable consideration and determining and applying appropriate methods of measuring progress for performance obligations satisfied over time.

Short-term Investments

We classify our Short-term investments as available-for-sale securities, which include U.S. government agency debt securities and U.S. treasury debt securities with original maturities of greater than three months. These securities are carried at fair market value, with unrealized gains and losses reported in Other comprehensive loss and Accumulated other comprehensive income (loss) within stockholders’ equity (deficit). We did not have any investments as of September 30, 2024. All of our investments were short-term in nature as of September 30, 2023.

Accounts Receivable, net

Net trade receivables related to ZTALMY sales, which are recorded in Accounts receivable, net on the consolidated balance sheets, were approximately $3.3 million and $2.6 million as of September 30, 2024 and December 31, 2023, respectively. As of both September 30, 2024 and December 31, 2023, we had no allowance for doubtful accounts. An allowance for doubtful accounts is determined based on our assessment of the credit worthiness and financial condition of our customers, aging of receivables, as well as the general economic environment. Any allowance would reduce the net receivables to the amount that is expected to be collected. We have three customers, one of which, Orsini Pharmaceutical Services, LLC (Orsini), a specialty pharmacy that dispenses ZTALMY directly to patients, represents approximately 98% of our ZTALMY revenue to date. Payment terms for Orsini are 30 days from the shipment date.

Excluding net trade receivables, Accounts receivable, net represents amounts due to us under the BARDA contract for valid expenditures expected to be reimbursed to us under the terms of the BARDA contract and current amounts due to us from Orion under the collaboration agreement (Note 12).

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Inventory

Inventories are recorded using actual costs and may consist of raw materials (ganaxolone API), work in process and finished goods. We began capitalizing Inventory related to ZTALMY subsequent to the March 2022 FDA approval of ZTALMY, as the related costs were expected to be recoverable through the commercialization and subsequent sale of ZTALMY. Prior to FDA approval of ZTALMY, costs estimated at approximately $2.0 million for commercially saleable product and materials were incurred and included in Research and development expenses. As a result, Cost of product revenues related to ZTALMY initially reflected a lower average per unit cost of materials and continued to do so into the second quarter of 2024, as previously expensed inventory was utilized for commercial production and sold to customers. We expect Cost of product revenues related to ZTALMY to begin to reflect the current on-going average per unit cost of materials for the remainder of 2024 and thereafter.

Debt Issuance Costs

Debt issuance costs incurred in connection with Note payable (Note 10) and Revenue interest financing payable (Note 11) are amortized to Interest expense over the term of the respective financing arrangement using the effective-interest method. Debt issuance costs, net of related amortization, are deducted from the carrying value of the related debt.

Contract Liabilities, net

When consideration is received, or such consideration is unconditionally due, from a customer prior to completing our performance obligation to the customer under the terms of a contract, a Contract liability is recorded. Contract liabilities expected to be recognized as revenue or a reduction of expense within the 12 months following the balance sheet date are classified as Current liabilities. Contract liabilities not expected to be recognized as revenue within the 12 months following the balance sheet date are classified as Long-term liabilities. In accordance with ASC 210-20, our Contract liabilities were partially offset by our Contract assets at September 30, 2024, as further discussed in Note 12.

Liability Related to Revenue Interest Financing and Non-Cash Interest Expense

In October 2022, we recognized a liability related to the Revenue Interest Financing Agreement with Sagard Healthcare Royalty Partners, LP (Sagard) under ASC 470-10 Debt and ASC 835-30 Interest - Imputation of Interest. The initial funds received by us from Sagard pursuant to the terms of the Revenue Interest Financing Agreement were recorded as a liability and will be accreted under the effective interest method upon the estimated amount of future royalty payments to be made pursuant to the Revenue Interest Financing Agreement. The issuance costs were recorded as a direct deduction to the carrying amount of the liability and will be amortized under the effective interest method over the estimated period the liability will be repaid. We estimated the total amount of future product revenue to be generated over the life of the Revenue Interest Financing Agreement, and a significant increase or decrease in these estimates could materially impact the liability balance and the related Interest expense. If the timing or amounts of any estimated future revenue and related payments change, we will prospectively adjust the effective interest and the related amortization of the liability and related issuance costs. The liability related to the Revenue Interest Financing Agreement with Sagard is further discussed in Note 11.

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3. Cash, Cash Equivalents and Short-Term Investments

As of September 30, 2024, our Cash and cash equivalents included $1.1 million of cash accounts in banking institutions and $41.1 million in money market funds. As of December 31, 2023, our Cash and cash equivalents included $1.3 million of cash accounts in banking institutions and $119.3 million in money market funds. Our Cash and cash equivalents are maintained in federally insured financial institutions in excess of the federally insured limit. Included in Other assets at December 31, 2023 was $0.2 million of accrued interest receivable related to our Short-term investments. At September 30, 2024, we had no accrued interest receivable or Short-term investments.

The following table provides details regarding our portfolio of Short-term investments (in thousands) as of December 31, 2023:


	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
December 31, 2023
U.S. Treasury securities	$	26,852	$	138	$	(155)	$	26,835
U.S. Government Agency securities		2,884		31		(34)		2,881
Total	$	29,736	$	169	$	(189)	$	29,716

4. Fair Value Measurements

FASB accounting guidance defines fair value as the price that would be received to sell an asset or paid to transfer a liability (the exit price) in an orderly transaction between market participants at the measurement date. The accounting guidance outlines a valuation framework and creates a fair value hierarchy in order to increase the consistency and comparability of fair value measurements and the related disclosures. In determining fair value, we use quoted prices and observable inputs. Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from independent sources.

The fair value hierarchy is broken down into three levels based on the source of inputs as follows:

●

Level 1 — Valuations based on unadjusted quoted prices in active markets for identical assets or liabilities.

●

Level 2 — Valuations based on observable inputs and quoted prices in active markets for similar assets and liabilities.

●

Level 3 — Valuations based on inputs that are unobservable and models that are significant to the overall fair value measurement.

If the inputs used to measure fair value fall within different levels of the hierarchy, the category level is based on the lowest priority level input that is significant to the fair value measurement of the instrument. As of September 30, 2024 and December 31, 2023, all of our financial assets and liabilities were classified as Level 1 or Level 2 valuations.

We estimate the fair values of our financial instruments categorized as Level 2 in the fair value hierarchy, including U.S. Treasury securities and U.S. Government Agency securities, by taking into consideration valuations obtained from third-party pricing services. The pricing services use industry standard valuation models, including both income- and market-based approaches, for which all significant inputs are observable, either directly or indirectly, to estimate fair value. These inputs include reported trades of and broker/dealer quotes on the same or similar securities, benchmark yields, issuer credit spreads, benchmark securities, and other observable inputs. We obtain a single price for each financial instrument and do not adjust the prices obtained from the pricing service.

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The following fair value hierarchy table presents information about each major category of our financial assets and liabilities measured at fair value on a recurring basis (in thousands):


	Level 1		Level 2		Level 3		Total
September 30, 2024
Assets
Cash	$	1,092	$	—	$	—	$	1,092
Money market funds (cash equivalents)		41,092		—		—		41,092
U.S. Treasury securities		—		—		—		—
Total assets	$	42,184	$	—	$	—	$	42,184
December 31, 2023
Assets
Cash	$	1,255	$	—	$	—	$	1,255
Money market funds (cash equivalents)		119,317		—		—		119,317
U.S. Treasury securities		—		26,835		—		26,835
Agency securities		—		2,881		—		2,881
Total assets	$	120,572	$	29,716	$	—	$	150,288

5. Inventory

Inventories are stated at actual costs and consisted of the following (in thousands):


	September 30,		December 31,
	2024		2023
Raw materials	$	4,806	$	436
Work in process		1,560		1,075
Finished goods		351		902
Total Inventories	$	6,717	$	2,413

6. Accrued Expenses

Accrued expenses consisted of the following (in thousands):


	September 30,		December 31,
	2024		2023
Payroll and related costs	$	2,129	$	7,746
Clinical trials and drug development		3,867		4,701
Accrued license agreement payment		—		4,000
Professional fees		858		1,236
Selling and commercial liabilities		6,106		3,901
Short-term lease liabilities		804		774
Other		395		501
Total accrued expenses	$	14,159	$	22,859

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7. Loss Per Share of Common Stock

Basic loss per share of common stock is computed by dividing Net loss attributable to common stockholders by the Weighted average number of shares of common stock outstanding during each period. Diluted loss per share of common stock includes the effect, if any, from the potential exercise or conversion of securities, such as convertible preferred stock, stock options and unvested restricted stock, which would result in the issuance of incremental shares of common stock. In computing the Basic and diluted net loss per share applicable to common stockholders, the Weighted average number of shares remains the same for both calculations due to the fact that when a Net loss exists, dilutive shares are not included in the calculation. These potentially dilutive securities are more fully described in Note 8.

The pre-funded warrants to purchase common stock issued in connection with the November 2022 offering are included in the calculation of Basic and diluted net loss per share as the exercise price of $0.001 per share is non-substantive and is virtually assured. The pre-funded warrants are more fully described in Note 8.

The following potentially dilutive securities have been excluded from the computation of diluted weighted-average shares of common stock outstanding, as they would be anti-dilutive:



	September 30,
	2024	2023
Restricted stock awards and restricted stock units	2,142,272	1,265,316
Stock options	8,423,068	7,188,661
	10,565,340	8,453,977

8. Stockholders’ Equity

Effective August 2014, we adopted our 2014 Equity Incentive Plan, as amended (2014 Plan), that authorizes us to grant stock options, restricted stock, and other equity-based awards, subject to adjustment in accordance with the 2014 Plan. As of September 30, 2024, 5,916,369 options to purchase shares of common stock were outstanding pursuant to grants in connection with the 2014 Plan, and no shares of common stock were available for future issuance. The amount, terms of grants, and exercisability provisions were determined and set by our board of directors. In accordance with the 2014 Plan, on January 1, 2024, the shares of common stock available for future grants under the 2014 Plan was increased to 3,090,220. No additional share are available for issuance under the 2014 Plan.

Effective May 2024, we adopted our 2024 Equity Incentive Plan (2024 Plan), that authorizes us to grant stock options, restricted stock, and other equity-based awards, up to a maximum of 4,000,000 awards, subject to adjustment in accordance with the 2024 Plan, plus shares that become available for grant as a result of the termination or forfeiture of awards under the 2014 Plan. As of September 30, 2024, 738,577 options to purchase shares of common stock were outstanding pursuant to grants in connection with the 2024 Plan, and 3,885,857 shares of common stock were available for future issuance.

Stock Options

There were 8,423,068 stock options outstanding as of September 30, 2024 at a weighted average exercise price of $8.94 per share, including 1,768,122 stock options outstanding outside of the 2014 and 2024 Plans, granted as inducements to new employees. During the nine months ended September 30, 2024, 2,430,868 options were granted to employees and directors at a weighted average exercise price of $7.11 per share. Of the options granted, 1,540,519 options were granted pursuant to the 2014 Plan, 766,374 options were granted pursuant to the 2024 Plan and 123,975 were granted outside of the 2014 and 2024 Plans as inducements for new employees.

Restricted Stock Units

All issued and outstanding restricted stock units are time-based, and generally become vested within three years of the grant date, pursuant to the 2014 and 2024 Plans. Compensation expense is recorded ratably over the requisite

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service period. Compensation expense related to restricted stock units is measured based on the fair value using the closing market price of our common stock on the date of the grant. During the nine months ended September 30, 2024, we granted 1,963,350 restricted stock units, pursuant to the 2014 and 2024 Plans. As of September 30, 2024, we had 2,142,272 restricted stock units outstanding.

Total compensation cost recognized for all stock options, restricted stock awards and restricted stock units in the statements of operations is as follows (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2024		2023		2024		2023
Research and development	$	1,353	$	1,519	$	4,629	$	4,329
Selling, general and administrative		3,477		2,487		9,981		7,309
Restructuring costs		—		—		330		—
Total	$	4,830	$	4,006	$	14,940	$	11,638

Preferred Stock

As of September 30, 2024 all shares of our Series A Convertible Preferred Stock (Preferred Stock) had been converted and none remained outstanding. In the three and nine months ended September 30, 2024, there were no conversions of shares of our Preferred Stock into shares of our common stock. In the nine months ended September 30, 2023, 4,300 shares of our Preferred stock were converted into 860,000 shares of our common stock. In the three months ended September 30, 2023, there were no conversions of shares of our Preferred Stock into shares of our common stock.

Underwritten Public Offering

In connection with an underwritten public offering in November 2022 and the closing of the related exercise of the underwriters’ option in December 2022, we issued a total of 12,421,053 shares of common stock and 2,105,264 pre-funded warrants (the Pre-funded Warrants) resulting in aggregate net proceeds, after underwriting discounts and commissions in the public offering and fees, of $64.5 million. The exercise price and the number of shares of common stock issuable upon exercise of each Pre-funded Warrant are subject to appropriate adjustment in the event of certain stock dividends and distributions, stock splits, stock combinations, reclassifications or similar events affecting the common stock as well as upon any distribution of assets, including cash, stock or other property, to our stockholders. The Pre-funded Warrants are exercisable at any time, will not expire and are exercisable in cash or by means of a cashless exercise. A holder of Pre-funded Warrants may not exercise such Pre-funded Warrants if the holder, together with its affiliates, would beneficially own more than 9.99% of the number of shares of common stock outstanding immediately after giving effect to such exercise. A holder of Pre-funded Warrants may increase or decrease this percentage not in excess of 19.99% by providing at least 61 days’ prior notice to us.

Sales Pursuant to Equity Distribution Agreement

On July 9, 2020, we entered into an Equity Distribution Agreement (EDA) with JMP Securities LLC (JMP), as amended by the March 31, 2023 Amendment No. 1 to the EDA (Amended EDA), to create an at the market equity program under which we from time to time may offer and sell shares of our common stock without a maximum aggregate offering price. The Amended EDA was entered into in connection with our filing of a Registration Statement on Form S-3 (File No. 333-271041) with the SEC (the 2023 Registration Statement), which includes a prospectus supplement covering the offering, issuance and sale by us of up to $75,000,000 of shares of common stock that may be issued and sold under the Amended EDA. Subject to the terms and conditions of the Amended EDA, JMP will be entitled to a commission of up to 3.0% of the gross proceeds from each sale of shares of our common stock. We did not sell any shares of our common stock during the three and nine months ended September 30, 2024 and September 30, 2023 under the EDA. As of September 30, 2024, we had up to $48.6 million of shares of common stock that may be issued and sold under the Amended EDA

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9. Commitments and Contingencies

Leases

We have entered into one operating lease for real estate with a term of 78 months, including renewal terms that can extend the lease term by 60 months, which we include in the lease term when it is reasonably certain that we will exercise the option. As of September 30, 2024, our operating lease for real estate had a remaining lease term of 12 months. The right-of-use (ROU) asset is included in Other assets on our interim consolidated balance sheets as of September 30, 2024 and December 31, 2023, and represents our right to use the underlying asset for the applicable lease terms. Our obligations to make lease payments are included in both Accrued expenses and Other long-term liabilities on our interim consolidated balance sheets as of September 30, 2024 and December 31, 2023. Additionally, we entered into several operating leases for clinical site equipment which were subsequently cancelled due to the discontinuation of the RAISE II trial. Our operating leases for clinical site equipment each had a term of 18 months prior to the May 2024 terminations of each lease. The ROU assets were included in Other assets on our consolidated balance sheets as of December 31, 2023, and represented our right to use the underlying assets for the applicable lease terms. The ROU assets related to the clinical site equipment operating leases were written off and included in restructuring costs for the nine months ended September 30, 2024. Our obligations to make lease payments were included in both Accrued expenses and Other long-term liabilities on our consolidated balance sheets as of December 31, 2023. All ROU assets were initially measured at cost, which comprise the initial amount of the lease liability adjusted for lease payments made at or before the lease commencement date, plus any initial direct costs incurred, less any lease incentives received. The ROU asset(s) are subsequently measured throughout the lease term at the carrying amount of the lease liability, plus initial direct costs, plus (minus) any prepaid (accrued) lease payments, less the unamortized balance of lease incentives received.

As of September 30, 2024 and December 31, 2023, ROU assets were $0.5 million and $1.0 million, respectively, and operating lease liabilities were $0.8 million and $1.4 million, respectively. We have entered into various short-term operating leases, primarily for clinical trial equipment, with an initial term of twelve months or less. These leases are not recorded on our balance sheets. All operating lease expense is recognized on a straight-line basis over the lease term. During the nine months ended September 30, 2024 and 2023, we recognized $1.4 million and $0.4 million, respectively, in total lease costs, of which $0.8 million recognized during the nine months ended September 30, 2024 were restructuring costs resulting from the RAISE II trial equipment lease terminations as noted above. During each of the three months ended September 30, 2024 and 2023, we recognized $0.1 million in total lease costs. In all periods, we recognized less than $0.1 million related to short-term operating leases.

Because the rate implicit in each lease is not readily determinable, we use our incremental borrowing rate to determine the present value of the lease payments. The weighted average incremental borrowing rate used to determine the initial value of ROU assets and lease liabilities was 11.0%, derived from a corporate yield curve based on a synthetic credit rating model using a market signal analysis. We have certain contracts for real estate which may contain lease and non-lease components which we have elected to treat as a single lease component.

ROU assets for operating leases are periodically reduced by impairment losses. We use the long-lived assets impairment guidance in ASC Subtopic 360-10, Property, Plant, and Equipment – Overall, to determine whether an ROU asset is impaired, and if so, the amount of the impairment loss to recognize. As of September 30, 2024, we recognized $0.8 million of impairment losses for our ROU asset related to the RAISE II trial equipment leases. These costs were including in restructuring costs in our consolidated statements of operations and comprehensive loss for the nine months ended September 30, 2024. There were no impairment losses recorded for the three months ended September 30, 2024. As of December 31, 2023, we had not recognized any impairment losses for our ROU assets.

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Maturities of operating lease liabilities as of September 30, 2024 were as follows (in thousands):




Remainder of 2024	$	211
2025		642
		853
Less: imputed interest		(49)
Total lease liabilities	$	804

Current operating lease liabilities	$	804
Non-current operating lease liabilities		—
Total lease liabilities	$	804

Contingencies

On June 5, 2024, a securities class action lawsuit captioned Bishins v. Marinus Pharmaceuticals, Inc., et. al., Case 2:24-cv-02430, was filed against us and certain of our officers in the U.S. District Court for the Eastern District of Pennsylvania. The complaint alleges violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended (Exchange Act) and Rule 10b-5 promulgated thereunder on the basis of purportedly materially false and misleading statements and omissions concerning our RAISE and RAISE II clinical trials. The complaint seeks, among other things, unspecified damages, attorneys’ fees, expert fees, and other costs. The court appointed a lead plaintiff and lead counsel for the action on August 16, 2024. The lead plaintiff filed an amended complaint on October 4, 2024. We intend to move to dismiss the amended complaint on or before November 22, 2024. We intend to vigorously defend against this action.

10. Notes Payable

On May 11, 2021 (Closing Date) and as amended on May 17, 2021, May 23, 2022, October 28, 2022 and June 6, 2024 (Credit Agreement), we entered into the Credit Agreement with Oaktree Fund Administration, LLC as administrative agent (Oaktree) and the lenders party thereto (collectively, the Lenders) that provided for a five-year senior secured term loan facility in an aggregate original principal amount of up to $125.0 million that was available to us in five tranches (collectively, the Term Loans).

Upon entering into the Credit Agreement in May 2021, we borrowed $15.0 million in term loans from the Lenders (Tranche A-1 Term Loans); upon receipt of written acceptance by the FDA of our NDA filing relating to the use of ganaxolone for CDD in September 2021, we borrowed $30.0 million of tranche A-2 term loans from the Lenders (Tranche A-2 Term Loans); and in March 2022, we borrowed $30.0 million in term loans from the Lenders that became available as a result of the approval by the FDA of ZTALMY oral suspension for the treatment of seizures associated with CDD in patients two years of age and older (Tranche B Term Loans). In May 2022, we entered into an amendment (the Credit Agreement Amendment) to extend the commitment date for the tranche C Term Loans (Tranche C Term Loans) commitment from June 30, 2023 to December 31, 2023, and to eliminate the commitment fees associated with the Tranche C Term Loans. Also in May 2022, we delivered to Oaktree a separate notice of commitment termination with respect to the tranche D term loans (Tranche D Term Loans) commitment. In October 2022, we entered into an amendment to, among other things, allow for the consummation of the Revenue Interest Financing Agreement with Sagard and the transactions thereunder. In addition, the Credit Agreement Amendment increased the exit fee due by us upon any repayment, whether as a prepayment or a scheduled repayment, of the principal of the loans under the Credit Agreement from 2.00% to 2.67%. In August 2023, we delivered to Oaktree a separate notice of commitment termination with respect to the $25.0 million of Tranche C Term Loans commitment. In June 2024, we entered into an amendment to remove the minimum liquidity covenant therein and reduce the remaining quarterly principal payments due in 2024 thereunder by 50%. On the June 6, 2024 amendment effective date, we also made a one-time prepayment of $15.0

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million of the outstanding tranche B loans, together with payment of the accrued and unpaid interest thereon and applicable exit and prepayment fees. Additionally, during the nine months ended September 30, 2024, we began paying the required quarterly principal payments. As of September 30, 2024, the loans under the Credit Agreement consisted of $58.1 million of previously drawn Term Loans with no additional funds available thereunder.

Until the June 6, 2024 amendment, the Credit Agreement contained a minimum liquidity covenant that required us to maintain cash and cash equivalents of at least $15.0 million from the funding date of the Tranche B Term Loans until the maturity of the Term Loans.

The Term Loans will be guaranteed by certain of our future subsidiaries (Guarantors). Our obligations under the Credit Agreement are secured by a pledge of substantially all of our assets and will be secured by a pledge of substantially all of the assets of the Guarantors.

The Term Loans mature on May 11, 2026 (Maturity Date). The Term Loans bear interest at a fixed per annum rate (subject to increase during an event of default) of 11.50%, and we are required to make quarterly interest payments until the Maturity Date. We are also required to make quarterly principal payments beginning on June 30, 2024 in an amount equal to 2.5% of the aggregate amount of the previously drawn Term Loans, and continuing until 2025, at which time we are required to make quarterly principal payments in an amount equal to 5.0% of the aggregate amount of the previously drawn Term Loans until the Maturity Date. On the Maturity Date, we are required to pay in full all outstanding Term Loans and other amounts owed under the Credit Agreement.

At the time of borrowing any tranche of the Term Loans, we were required to pay an upfront fee of 2.0% of the aggregate principal amount borrowed at that time. In addition, a commitment fee of 75 basis points per annum began to accrue on each of the tranche B, C, and D commitments for the period beginning 120 days after the funding date of the Tranche A-2 Term Loans and continued until the applicable tranche was either funded or terminated, at which time the related commitment fees were due. The Tranche A-2 Term Loans were funded on September 27, 2021, and as such, we began accruing the commitment fees for tranche B, C, and D Term Loans 120 days later, on January 25, 2022. We drew down the additional $30.0 million of Tranche B Term Loans in March 2022, and paid less than $0.1 million in commitment fees related to Tranche B Term Loans. The May 2022 amendment eliminated the commitment fees related to the Tranche C Term Loans, and separately, we terminated the Tranche D Term Loans in May 2022 and the Tranche C Term Loans in August 2023.

We may prepay all or any portion of the Term Loans, and are required to make mandatory prepayments of the Term Loans from the proceeds of asset sales, casualty and condemnation events, and prohibited debt issuances, subject to certain exceptions. All mandatory and voluntary prepayments of the Term Loans are subject to prepayment premiums equal to 2% of the principal prepaid if prepayment occurs after May 11, 2024 but on or before May 11, 2025. If prepayment occurs after May 11, 2025, no prepayment premium is due. The June 2024 prepayment of $15.0 million resulted in an additional $0.3 million of prepayment premiums that are included in interest expense for the nine months ended September 30, 2024.

In addition, we are required to pay an exit fee in an amount equal to 2.67% of all principal repaid, whether as a mandatory prepayment, voluntary prepayment, or a scheduled repayment. Prior to the October 28, 2022 amendment to the Credit Agreement, the exit fee was 2.0%. The increase in the exit fee resulted in an additional $0.5 million of debt issuance costs that are classified as a contra-liability on the consolidated balance sheets and is being recognized as Interest expense over the term of the loan using the effective interest method.

We are subject to a number of affirmative and restrictive covenants under the Credit Agreement, including limitations on our ability and our subsidiaries’ abilities, among other things, to incur additional debt, grant or permit additional liens, make investments and acquisitions, merge or consolidate with others, dispose of assets, pay dividends and distributions, and enter into affiliate transactions, subject to certain exceptions. As of September 30, 2024, we were in compliance with all covenants.

Upon the occurrence of certain events, including but not limited to our failure to satisfy our payment obligations under the Credit Agreement, the breach of certain of our other covenants under the Credit Agreement, the

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occurrence of cross defaults to other indebtedness, or defaults related to enforcement action by the FDA or other Regulatory Authority or recall of ganaxolone, Oaktree and the Lenders will have the right, among other remedies, to accelerate all amounts outstanding under the Term Loans and declare all principal, interest, and outstanding fees immediately due and payable.

In March 2022, we borrowed $30.0 million upon the approval by the FDA of ZTALMY for CDD and incurred debt issuance costs of $1.8 million, including the exit fee of $0.6 million, that are classified as contra-liabilities on our consolidated balance sheets and are being recognized as Interest expense over the term of the loan using the effective interest method.

In September 2021, we borrowed $30.0 million upon receipt of written acceptance by the FDA of our NDA filing relating to the use of ganaxolone in the treatment of CDD and incurred debt issuance costs of $1.2 million, including the exit fee of $0.6 million, that are classified as contra-liabilities on our consolidated balance sheets and are being recognized as Interest expenses over the term of the loan using the effective-interest method.

In May 2021, we borrowed $15.0 million upon entering into the Credit Agreement and incurred debt issuance costs of $4.4 million, including the exit fee of $0.3 million, that are classified as a contra-liabilities on the consolidated balance sheet and are being recognized as Interest expenses over the term of the loan using the effective-interest method.

For the nine months ended September 30, 2024, we recognized interest expense of $7.8 million, of which $6.3 million was interest on the Term Loans and $1.5 million was non-cash interest expense related to the amortization of debt issuance costs.

The following table summarizes the composition of Notes payable as reflected on the consolidated balance sheet as of September 30, 2024 (in thousands):


Gross proceeds	$	75,000
Contractual exit fees		2,003
Principal payments including associated exit fees		(19,251)
Unamortized debt discount and issuance costs		(2,564)
Total note payable	$	55,188

Current portion of note payable		13,475
Non-current portion of note payable		41,713
Total note payable	$	55,188

The aggregate maturities of Notes payable as of September 30, 2024 are as follows (in thousands):


Remainder of 2024	$	1,875
2025		15,000
2026		39,375
Total	$	56,250

11. Revenue Interest Financing Agreement

On October 28, 2022 (Closing Date), we entered into a revenue interest financing agreement (Revenue Interest Financing Agreement) with Sagard Healthcare Royalty Partners, LP (Sagard) pursuant to which we received $32.5 million (Investment Amount) to provide funding for our development and commercialization of ganaxolone and related pharmaceutical products, including the commercial launch of ZTALMY, and for working capital and general administrative purposes. On June 6, 2024, we entered into the first amendment to the Revenue Interest Financing

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Agreement (the Amendment) with Sagard, to, among other things, remove the minimum liquidity covenant therein so long as the obligations under the Oaktree Credit Agreement are outstanding.

In exchange for the Investment Amount, we have agreed to make quarterly payments to Sagard (Payments) as follows: (i) for each calendar quarter from and after the Closing Date through and including the quarter ended June 30, 2026, an amount equal to 7.5% of (a) our U.S. net sales of ZTALMY and all other pharmaceutical products that contain ganaxolone (Net Sales), in each case with any dosage form, dosing regimen, or strength, or any improvements related thereto (collectively, Included Products) and (b) certain other payments received by us in connection with the manufacture, development and sale of the Included Products in the U.S. (Other Included Payments, and, together with Net Sales, Product Revenue); and (ii) for each calendar quarter following the calendar quarter ended June 30, 2026, an amount equal to (x) 15.0% of the first $100 million in annual Product Revenue of the Included Products and (y) 7.5% of annual Product Revenue of the Included Products in excess of $100 million.

The Payments are subject to a hard cap equal to 190% of the Investment Amount (Hard Cap) or $61.8 million. Sagard’s right to receive payments will terminate when Sagard has received payments in respect of the Included Products, including any additional payments described below, equal to the Hard Cap. Further, we have the right to make voluntary prepayments to Sagard, and such payments will be credited against the Hard Cap.

If Sagard has not received aggregate payments equaling at least 100% of the Investment Amount by December 31, 2027 or at least 190% of the Investment Amount by December 31, 2032 (each, a Minimum Amount), then we will be obligated to make a cash payment to Sagard in an amount sufficient to gross up Sagard up to the applicable Minimum Amount within a specified period of time after each reference date.

The obligations under the Revenue Interest Financing Agreement, including the Payments, will be guaranteed by certain of our future subsidiaries that are required to become a party thereto as guarantors (Guarantors). Our obligations under the Revenue Interest Financing Agreement and the guarantee of such obligations are secured, subject to customary permitted liens and other agreed upon exceptions and subject to an intercreditor agreement with Oaktree as administrative agent for the lenders under our credit agreement (as described below, the Credit Agreement), by a pledge of substantially all of our and the Guarantors’ assets that relate to, or are used or held for use for, the development, manufacture, use and/or commercialization of ZTALMY and all other pharmaceutical products that contain ganaxolone in the U.S., including the Product Revenue, pursuant to the terms of the Security Agreement dated as of the Closing Date by and among us, the Guarantors from time to time party thereto, and Sagard (Security Agreement).

At any time, we have the right, but not the obligation (Call Option), to repurchase all, but not less than all, of Sagard’s interest in the Payments at a repurchase price (Put/Call Price) equal to: (a) on or before the third anniversary of the Closing Date, 160% of the Investment Amount; (b) after the third anniversary but on or prior to the fourth anniversary of the Closing Date, 180% of the Investment Amount; and (c) after the fourth anniversary of the Closing Date, 190% of the Investment Amount, in each case, less the aggregate of all of our payments in respect of the Payments made to Sagard prior to such date.

The Revenue Interest Financing Agreement contains certain restrictions on our and our subsidiaries’ abilities, among other things, to incur additional debt, grant or permit additional liens, make investments and acquisitions, dispose of assets, pay dividends and distributions and enter into affiliate transactions, in each case, subject to certain exceptions. In addition, the Revenue Interest Financing Agreement contains a financial covenant that requires us, after the repayment of the loans under the Credit Agreement with Oaktree, to maintain at all times cash and cash equivalents in certain deposit accounts in an amount at least equal to $10.0 million.

In connection with the Revenue Interest Financing Agreement, on the Closing Date, we entered into the Credit Agreement Amendment with Oaktree which is fully described in Note 10.

Issuance costs pursuant to the Revenue Interest Financing Agreement consisted primarily of advisory and legal fees and totaled $2.6 million. In June 2024, an additional $0.1 million of issuance costs was incurred related to the Amendment. These issuance costs were recorded as a direct deduction to the carrying amount of the liability and will be amortized under the effective interest method over the estimated period the liability will be repaid. For the nine months ended September 30, 2024, we estimated an effective annual interest rate of approximately 17%. Due to the impact

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resulting from the recently announced TrustTSC top-line data, we estimate a lower effective annual interest rate of 13% going forward. Over the course of the Revenue Interest Financing Agreement, the actual interest rate will be affected by the amount and timing of net ZTALMY revenue recognized and changes in the timing of forecasted net ZTALMY revenue. On a quarterly basis, we reassess the expected timing of the net ZTALMY revenue, recalculate the amortization and effective interest rate and adjust the accounting prospectively as needed.

The following table summarizes the activity of the Revenue Interest Financing Agreement for the nine months ended September 30, 2023 and September 30, 2024 (in thousands):



For the nine months ended September 30, 2023
Revenue Interest Financing Balance at December 31, 2022	$	30,877
Non-cash interest expense in the nine months ended September 30, 2023		4,421
Amortization of debt discount in the nine months ended September 30, 2023		194
Payments made in the nine months ended September 30, 2023		(736)
Revenue Interest Financing Balance at September 30, 2023	$	34,756

Current portion of revenue interest financing liability		1,901
Long-term portion of revenue interest financing liability		32,855
Revenue Interest Financing Balance at September 30, 2023	$	34,756

For the nine months ended September 30, 2024
Revenue Interest Financing Balance at December 31, 2023	$	35,977
Non-cash interest expense in the nine months ended September 30, 2024		4,528
Amortization of debt discount in the nine months ended September 30, 2024		441
Payments made in the nine months ended September 30, 2024		(1,744)
Revenue Interest Financing Balance at September 30, 2024	$	39,202

Current portion of revenue interest financing liability	$	3,163
Long-term portion of revenue interest financing liability		36,039
Revenue Interest Financing Balance at September 30, 2024	$	39,202

12. Collaboration Revenue

Orion Collaboration Agreement

In July 2021, we entered into a collaboration agreement (Orion Collaboration Agreement) with Orion. The Orion Collaboration Agreement falls under the scope of ASC Topic 808, Collaborative Arrangements (ASC 808) as both parties are active participants in the arrangement that are exposed to significant risks and rewards. While this arrangement is in the scope of ASC 808, we analogize to ASC 606 for some aspects of this arrangement, including for the delivery of a good or service (i.e., a unit of account). Revenue recognized by analogizing to ASC 606 is recorded as collaboration revenue on the consolidated statements of operations.

Under the terms of the Orion Collaboration Agreement, we granted Orion an exclusive, royalty-bearing, sublicensable license to certain of our intellectual property rights with respect to commercializing biopharmaceutical products incorporating our product candidate ganaxolone (Licensed Products) in the European Economic Area, the United Kingdom and Switzerland (collectively, the Territory) for the diagnosis, prevention and treatment of certain human diseases, disorders or conditions (Field), initially in the indications of CDD, TSC and RSE. We will be responsible for the continued development of Licensed Products and regulatory interactions related thereto, including conducting and sponsoring all clinical trials, provided that Orion may conduct certain post-approval studies in the Territory. Orion will be responsible, at Orion’s sole cost and expense, for the commercialization of any Licensed Product in the Field in the Territory.

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Under the terms of the Orion Collaboration Agreement, we received a €25.0 million ($29.6 million) upfront payment from Orion in July 2021. In connection with the upfront fee, we agreed to provide Orion with the results of a planned genotoxicity study on the M2 metabolite of ganaxolone, a “Combined Micronucleus & Comet study in vivo.” In May 2022, the final study report was received, which confirmed that no genotoxicity was found, as measured by formation of micronuclei in the bone marrow or comet morphology in the liver. In the event that the results of such study were positive, based on the criteria set forth in the study’s protocol, Orion would have had the right to terminate the Orion Collaboration Agreement within ninety (90) days after its receipt of the final report of such study, in which case we would have been required to refund Orion seventy-five percent (75%) of the upfront fee. We are eligible to receive up to an additional €97 million in R&D reimbursement and cash milestone payments based on specific clinical and commercial achievements, as well as tiered royalty payments based on net sales ranging from the low double-digits to high teens for the oral programs and the low double-digits to low 20s for the IV program. Also, as part of the overall arrangement, we have agreed to supply the Licensed Products to Orion at an agreed upon price.

The Orion Collaboration Agreement shall remain effective until the date of expiration of the last to expire Royalty Term, which is defined as the period beginning on the date of the first commercial sale Licensed Product in such country and ending on the latest to occur of (a) the tenth (10th) anniversary of the first commercial sale of Licensed Product in such country, (b) the expiration of the last-to-expire licensed patent covering the manufacture, use or sale of such Licensed Product in such country, and (c) the expiration of regulatory exclusivity period, if any, for such Licensed Product in such country. The Orion Collaboration Agreement has a term of at least ten (10) years since a commercial sale has yet to occur. The Orion Collaboration Agreement allows for termination in certain specific events, such as material breach, in the event Orion challenges the validity, enforceability or scope of the licensed patent rights, termination for forecast failure, insolvency and force majeure, none of which are probable at contract inception.

In accordance with the guidance, we identified the following commitments under the arrangement: (i) exclusive rights to develop, use, sell, have sold, offer for sale and import any product comprised of Licensed Product (License) (ii) development and regulatory activities (Development and Regulatory Activities), and (iii) requirement to supply Orion with the Licensed Product at an agreed upon price (Supply of Licensed Product). We determined that these three commitments represent distinct performance obligations for purposes of recognizing revenue or reducing expense, which we will recognize such revenue or expense, as applicable, as we fulfill these performance obligations.

At contract inception, we determined that the non-refundable portion of the upfront payment plus the research and development reimbursement constitutes the transaction price as of the outset of the Orion Collaboration Agreement. The refundable portion of the upfront payment and the future potential regulatory and development milestone payments were fully constrained at contract inception as the risk of significant revenue reversal related to these amounts had not yet been resolved. During 2022, the refundable portion of the upfront payment was determined to be included in the transaction price as the final genotoxicity study on the M2 metabolite of ganaxolone was received as described above and the remaining $12.7 million of the upfront payment was recorded as collaboration revenue in the year ended December 31, 2022. The achievement of the future potential milestones is not within our control and is subject to certain research and development success and therefore carry significant uncertainty. As a result of the July 2023 EC approval of ZTALMY oral suspension for the adjunctive treatment of epileptic seizures associated with CDD in patients two to 17 years of age, we are now eligible under the Orion Collaboration Agreement to receive a commercial milestone payment of €10 million, if commercial sales of ZTALMY commence in the Territory, due upon the earlier of (1) the first commercial sale of ZTALMY within two of a select set of countries consisting of Germany, France, Italy, Spain, and the United Kingdom and (2) the 18-month anniversary of the first commercial sale of ZTALMY in the Territory. We will reevaluate the likelihood of achieving these milestones at the end of each reporting period and adjust the transaction price in the period the risk is resolved. In addition, we will recognize any consideration related to sales-based milestones and royalties when the subsequent sales occur since those payments relate primarily to the License, which was delivered by us to Orion upon entering into the Orion Collaboration Agreement.

The transaction price was allocated to the three performance obligations based on the estimated stand-alone selling prices at contract inception. The stand-alone selling price of the License was based on a discounted cash flow approach and considered several factors including, but not limited to, discount rate, development timeline, regulatory risks, estimated market demand and future revenue potential using an adjusted market approach. The stand-alone selling

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price of the Development and Regulatory Activities and the Supply of Licensed Product was estimated using the expected cost-plus margin approach.

As of December 31, 2023, there was a total contract liability of $13.7 million and a total contract asset of $2.9 million. In accordance with ASC 210-20, the contract liability was offset by the contract asset related to the reimbursement of research and development costs, which resulted in a net contract liability of $10.8 million as of December 31, 2023.

Transaction Price and Net Contract Liability as of December 31, 2023:


			Cumulative Collaboration
	Transaction		Revenue Recognized		Contract
	Price		as of December 31, 2023		Liability
License	$	21,660	$	21,660	$	-
Development and Regulatory Services		6,717		2,511		4,206
Supply of Licensed Product		9,503		-		9,503
	$	37,880	$	24,171	$	13,709

Less Total Contract Asset						2,912
Net Contract Liability					$	10,797

During the nine months ended September 30, 2024, we amortized $1.0 million of the transaction price associated with the Development and Regulatory Services as a reduction of research and development costs. These reductions to the transaction price resulted in a total contract liability of $12.7 million as of September 30, 2024. In accordance with ASC 210-20, the contract liability of $12.7 million is offset by the contract asset of $1.3 million related to the reimbursement of research and development costs, resulting in a net contract liability of $11.4 million as of September 30, 2024.

Transaction Price and Net Contract Liability as of September 30, 2024:


			Cumulative Collaboration
	Transaction		Revenue Recognized		Contract
	Price		as of September 30, 2024		Liability
License	$	21,660	$	21,660	$	-
Development and Regulatory Services		6,717		3,529		3,188
Supply of Licensed Product		9,503		-		9,503
	$	37,880	$	25,189	$	12,691

Less Total Contract Asset						1,277
Net Contract Liability					$	11,414

We incurred $2.0 million of incremental costs in connection with obtaining the Orion Collaboration Agreement. These contract acquisition costs were allocated consistent with the transaction price, resulting in $1.1 million of expense recorded to selling, general and administrative expense commensurate with the recognition of the License performance obligation and $0.9 million recorded as capitalized contract costs, included in other current assets and other assets, which are being amortized as Development and Regulatory Services and Supply of Licensed Product obligations are met.

Tenacia Collaboration Agreement

On November 16, 2022 (Effective Date), we entered into a Collaboration and Supply Agreement (Tenacia Collaboration Agreement) with Tenacia Biotechnology (Shanghai) Co., Ltd. (Tenacia). The Tenacia Collaboration Agreement falls under the scope of ASC Topic 808, Collaborative Arrangements (ASC 808) as both parties are active participants in the arrangement that are exposed to significant risks and rewards. While this arrangement is in the scope

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of ASC 808, we analogize to ASC 606 for some aspects of this arrangement, including for the delivery of a good or service (i.e., a unit of account). Revenue recognized by analogizing to ASC 606 is recorded as collaboration revenue on the consolidated statements of operations.

Under the terms of the Tenacia Collaboration Agreement, we granted Tenacia an exclusive, royalty-bearing, sublicensable license to certain of our intellectual property rights to develop, commercialize and otherwise exploit certain products incorporating certain oral and intravenous formulations of our product candidate ganaxolone (Licensed Products) in Mainland China, Hong Kong, Macau and Taiwan (collectively, Territory) for the diagnosis, prevention and treatment of certain human diseases, disorders or conditions (Field), initially for the treatment of cyclin-dependent kinase-like 5 deficiency disorder, tuberous sclerosis complex and SE (including refractory and established SE) (collectively, the Initial Indications). The collaboration can be expanded to include additional indications and formulations of ganaxolone pursuant to a right of first negotiation.

Under the terms of the Tenacia Collaboration Agreement, Tenacia agreed to pay us an upfront cash payment of $10 million (the Upfront Fee) within forty-five (45) days after the Effective Date, which was paid in December 2022. In addition to the Upfront Fee, Tenacia has agreed to make cash payments to us upon the achievement of certain development, regulatory and sales-based milestones related to (i) the Initial Indications and (ii) the first new formulation or pro-drug of ganaxolone or any back-up compound of ganaxolone in a new indication (Selected Product) for which the parties amend the Tenacia Collaboration Agreement in connection with Tenacia’s exercise of its right of first negotiation and for which there is no other Licensed Product approved in China (for clarity, the milestone payments under this clause (ii) will only apply to one Selected Product), up to an aggregate amount of $256 million. Of the milestones, $15 million relates to regulatory approvals with separate milestones related to each of oral and intravenous formulations and the Selected Product, and an aggregate of $241 million of sales-based milestones are connected to annual revenue thresholds specific to each of the oral, intravenous and Selected Product formulations of ganaxolone. Tenacia has further agreed to pay us tiered royalty payments based on annual net sales of Licensed Products ranging from the low double digits to the mid-teens for each of the oral formulation, intravenous formulation and Selected Product formulation of Licensed Products. Tenacia’s obligations to pay royalties to us with respect to sales of a Licensed Product in each particular jurisdiction of the Territory will commence on the date of first commercial sale in such jurisdiction and expire upon the latest of (i) ten years following the first commercial sale of such Licensed Product in such jurisdiction, (ii) the expiration of the last-to-expire valid claim of any licensed patent rights that covers such Licensed Product in such jurisdiction and (iii) the expiration of all regulatory exclusivities for such Licensed Product in such jurisdiction. Royalty payments are subject to reduction in specified circumstances as set forth in the Tenacia Collaboration Agreement, including if net sales decrease by a certain percentage after the introduction of a generic product.

Tenacia will be primarily responsible for the development of Licensed Products in the Territory and regulatory interactions related thereto, including conducting and sponsoring clinical studies in the Field in the Territory to support regulatory filings in the Territory. All regulatory approvals filed by Tenacia in the Territory will be in the name of and owned by us unless otherwise required by applicable law, in which case such regulatory approvals would be in the name of and owned by Tenacia for the benefit of us. We and Tenacia have agreed to enter into clinical and commercial supply agreements pursuant to which we will supply Tenacia with its requirements of Licensed Products necessary for Tenacia to develop and commercialize Licensed Products in the Field in the Territory. The parties entered into the clinical and commercial supply agreement in May 2023. The agreement contains pricing, delivery, acceptance, payment, termination, forecasting, and other terms consistent with the Tenacia Collaboration Agreement, as well as certain quality assurance, indemnification, liability and other standard industry terms. Tenacia will be responsible for, at Tenacia’s sole cost and expense, obtaining regulatory approval and commercializing the Licensed Product in the Field in Mainland China. Tenacia enrolled patients in our Phase 3 randomized, double blind, placebo-controlled trial (TrustTSC trial) of adjunctive ganaxolone.

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The term of the Tenacia Collaboration Agreement extends for so long as royalties are payable anywhere in the Territory. Subject to the terms of the Tenacia Collaboration Agreement, (i) for a specified period of time after the Effective Date, Tenacia may terminate the Tenacia Collaboration Agreement in its entirety for any or no reason upon written notice to us, and (ii) either party may terminate the Tenacia Collaboration Agreement for the other party’s material breach following a cure period or insolvency.

In accordance with the guidance, we identified the following commitments under the arrangement: (i) grant to Tenacia the exclusive rights to develop, commercialize and otherwise exploit Licensed Product in the Field in the Territory (License) and (ii) requirement to supply Tenacia with the Licensed Product at an agreed upon price (Supply of Licensed Product). We determined that these two commitments represent distinct performance obligations for purposes of recognizing revenue or reducing expense, which it will recognize such revenue or expense, as applicable, as it fulfills these performance obligations.

The transaction price was allocated to the two performance obligations based on the estimated stand-alone selling prices at contract inception. The stand-alone selling price of the License was based on a discounted cash flow approach and considered several factors including, but not limited to, discount rate, development timeline, regulatory risks, estimated market demand and future revenue potential using an adjusted market approach. The stand-alone selling price of the Supply of Licensed Product was estimated using the expected cost-plus margin approach.

There was no activity during each of the three and nine months ended September 30, 2024 and 2023. The cumulative collaboration revenue recognized as of September 30, 2024 and December 31, 2023 is $3.0 million, which was the $3.0 million transaction price associated with the License as revenue at contract inception. No license revenue was recorded during each of the three and nine months ended September 30, 2024 and 2023. There was a total contract liability of $7.0 million as of both September 30, 2024 and December 31, 2023. In accordance with ASC 210-20, the contract liability of $7.0 million is offset by a contract asset of $0.7 million, resulting in a net contract liability of $6.3 million as of both September 30, 2024 and December 31, 2023.

Transaction Price and Net Contract Liability as of September 30, 2024 and December 31, 2023:


			Cumulative Collaboration
	Transaction		Revenue Recognized		Contract
	Price		as of September 30, 2024 and December 31, 2023		Liability
License	$	2,998	$	2,998	$	-
Supply of Licensed Product		7,002		-		7,002
	$	10,000	$	2,998	$	7,002

Less Total Contract Asset						700
Net Contract Liability					$	6,302

We incurred $1.0 million of incremental costs in obtaining the Tenacia Collaboration Agreement. These contract acquisition costs were allocated consistent with the transaction price, resulting in $0.1 million of expense recorded to Selling, general and administrative expense and $0.2 million recorded to Cost of collaboration revenue, commensurate with the recognition of the License performance obligation, and $0.7 million recorded as capitalized contract costs, which will be amortized as Supply of License Product obligations are met.

Biologix Distribution and Supply Agreement

In May 2023, we entered into an exclusive distribution and supply agreement (Biologix Agreement) with Biologix FZCo (Biologix), whereby Biologix has the right to distribute and sell ganaxolone in Algeria, Bahrain, Egypt, Iraq, Jordan, Kingdom of Saudi Arabia, Kuwait, Lebanon, Libya, Morocco, Oman, Qatar, Tunisia and United Arab Emirates. In exchange for distribution rights, we will be the exclusive supplier of our products to Biologix on terms set forth in the respective agreements in exchange for a negotiated purchase price for the products. Upon execution of the Biologix Agreement, we received an upfront payment of $0.5 million which is to be recognized over the term of the

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Biologix Agreement. We may be entitled to additional fees upon regulatory milestones. In the three and nine months ended September 30, 2024 and 2023, we recorded less than $0.1 million of Collaboration revenue related to the Biologix Agreement. There was a total Contract liability of $0.4 million and $0.5 million at September 30, 2024 and September 30, 2023, respectively.

13. Restructuring Costs

On April 15, 2024, we announced that the independent Data Monitoring Committee (DMC) completed its review of the interim analysis of the RAISE trial. The trial did not meet the pre-defined interim analysis stopping criteria on the coprimary endpoints. On April 30, 2024, we implemented a reduction-in-force (RIF) which impacted approximately 20% of our workforce, and implemented additional cost reduction activities with impact beginning in the second quarter of 2024. We incurred approximately $2.0 million of restructuring costs in the nine months ended September 30, which primarily consisted of severance payments, employee benefits and related costs, as well as noncash stock compensation expense and contract termination costs related to clinical site equipment no longer being utilized. At September 30, 2024, we had no unpaid restructuring costs.

The following table summarizes the restructuring balances at September 30, 2024 (in thousands):


Restructuring costs payable at December 31, 2023	$	—
Restructuring costs incurred the nine months ended September 30, 2024:
Personnel costs, including severance and related costs		1,193
Clinical equipment contract termination costs		759
Restructuring costs paid in the nine months ended September 30, 2024		(1,622)
Less noncash stock-based compensation expense related to RIF		(330)
Total Restructuring costs payable at September 30, 2024	$	—

14. Subsequent Events

On October 24, 2024, we announced top-line data from our Phase 3 TSC (TrustTSC) clinical trial. The trial did not meet the primary endpoint of percent change in 28-day TSC-associated seizure frequency. As a result of the TrustTSC outcome, we discontinued further ganaxolone clinical development, other than activities required by the FDA and EMA specific to post-approval commitments of Ztalmy for CDD. On November 4, 2024, we implemented a RIF that impacted approximately 45% of our workforce. In connection with the RIF, we estimate that we will incur in the fourth quarter of 2024 severance and other employee-related costs of approximately $1.5 million. We are also in the process of assessing any other impact associated with the termination of certain contracts and all other activities under the November 4, 2024 RIF.

In connection with the TrustTSC top-line data results, we also commenced a process to explore strategic alternatives with the goal of maximizing value for our stockholders and engaged Barclays as an advisor to assist in our review of strategic alternatives. There can be no assurance that the exploration of strategic alternatives will result in any agreements or transactions, or as to the timing of any such agreements or transactions.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Cautionary Note Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q contains forward-looking statements, within the meaning of the U.S. Private Securities Litigation Reform Act of 1995, that involve substantial risks and uncertainties. In some cases, you can identify forward-looking statements by the words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “might,” “objective,” “ongoing,” “plan,” “predict,” “project,” “potential,” “should,” “will,” or “would,” and or the negative of these terms, or other comparable terminology intended to identify statements about the future. These statements involve known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements to be materially different from the information expressed or implied by these forward-looking statements. Although we believe that we have a reasonable basis for each forward-looking statement contained in this Quarterly Report on Form 10-Q, we caution you that these statements are based on a combination of facts and factors currently known by us and our expectations of the future, about which we cannot be certain.

The forward-looking statements in this Quarterly Report on Form 10-Q include, among other things, statements about:

●

our plans to continue to successfully commercialize ganaxolone in Cyclin-dependent Kinase-like 5 (CDKL5) Deficiency Disorder (CDD) in the U.S.;

●

our expectations about the development of ganaxolone for Refractory Status Epilepticus (RSE) after the Phase 3 RAISE trial top-line data assessments;

●

our expectations that our cost reduction activities, which were implemented in the second and fourth quarters of 2024, will be sufficient to fund our operating expenses and capital expenditure requirements into the second quarter of 2025;

●

our plans to meet our post-approval commitments to the U.S. Food and Drug Administration (FDA) and the European Commission (EC) for ganaxolone;

●

our expectations regarding the commercialization of ganaxolone in the European Union (EU), including the timing thereof;

●

the potential benefits of ganaxolone in indications other than CDD, including RSE, Tuberous Sclerosis Complex (TSC) and Lennox Gastaut Syndrome (LGS);

●

the status, timing and results of preclinical studies and clinical trials;

●

our ability to maintain marketing approval for ganaxolone for CDD;

●

our estimates of expenses and future revenue and profitability;

●

our estimates regarding our capital requirements and our needs for additional financing;

●

our estimates of the size of the potential markets for ganaxolone;

●

our expectations regarding our collaborations with Orion Corporation (Orion), Tenacia Biotechnology (Shanghai) Co., Ltd. (Tenacia) and Biologix FZCo (Biologix), including the expected amounts and timings of milestone, royalty and other payments, including research and development reimbursement, if applicable, pursuant thereto;

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●

our ability to attract collaborators with acceptable development, regulatory and commercial expertise;

●

the benefits and contractual requirements derived from corporate collaborations, license agreements, and other collaborative or acquisition efforts, including those relating to the development and commercialization of ganaxolone;

●

sources of revenue, including expected future sales of ganaxolone for CDD, revenue contributions from our contract (BARDA Contract) with the Biomedical Advanced Research and Development Authority (BARDA), corporate collaborations, license agreements, and other collaborative efforts for the development and commercialization of ganaxolone for CDD and in other indications being developed for ganaxolone;

●

our ability to maintain necessary personnel for critical corporate functions as well as an effective commercial infrastructure to continue to successfully market and sell ZTALMY;

●

the pricing and the timing and amount of reimbursement for ganaxolone;

●

the success of other competing therapies that may become available;

●

the manufacturing capacity and supply for ganaxolone;

●

the possibility that third parties, such as Ovid Therapeutics, Inc. (Ovid), may initiate legal proceedings alleging that we are infringing their intellectual property rights, the outcome of which would be uncertain and could harm our business;

●

the anticipated cost savings associated with our restructuring activities;

●

the possibility that we may need to pursue bankruptcy or dissolution if we are not able to identify and implement a meaningful strategic alternative in a timely manner;

●

the possibility that we become involved in additional securities litigation that could further divert our management’s attention and harm our business;

●

our ability to maintain and protect our intellectual property rights;

●

our results of operations, financial condition, liquidity and prospects;

●

our ability to, among other actions, secure additional financing or strategic alternative transactions and continue as a going concern;

●

the possibility that we fail to meet the listing requirements of the Nasdaq Stock Market;

●

the enforceability of the exclusive forum provisions in our fourth amended and restated certificate of incorporation; and

●

the industry in which we operate and trends which may affect the industry or us.

You should refer to Part II Item 1A. Risk Factors of this Quarterly Report on Form 10-Q and Part I Item 1A. Risk Factors of our Annual Report on Form 10-K filed with the Securities and Exchange Commission (SEC) on March 5, 2024 for a discussion of important factors that may cause our actual results to differ materially from those expressed or implied by our forward-looking statements. As a result of these factors, we cannot assure you that the forward-looking statements in this Quarterly Report on Form 10-Q will prove to be accurate. Furthermore, if our forward-looking

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statements prove to be inaccurate, the inaccuracy may be material. In light of the significant uncertainties in these forward-looking statements, you should not regard these statements as a representation or warranty by us or any other person that we will achieve our objectives and plans in any specified time frame or at all. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

You should read this Quarterly Report on Form 10-Q and the documents that we reference in this Quarterly Report on Form 10-Q and have filed as exhibits to this Quarterly Report on Form 10-Q completely and with the understanding that our actual future results may be materially different from what we expect. We qualify all of our forward-looking statements by these cautionary statements.

The following Management’s Discussion and Analysis of Financial Condition and Results of Operations should be read in conjunction with: (i) the interim consolidated financial statements and related notes thereto, which are included in this Quarterly Report on Form 10-Q; and (ii) our annual consolidated financial statements for the year ended December 31, 2023, which are included in our Annual Report on Form 10-K filed with the SEC on March 5, 2024.

Overview

We are a commercial-stage pharmaceutical company dedicated to the development of innovative therapeutics for the treatment of seizure disorders, including rare genetic epilepsies and status epilepticus (SE). On March 18, 2022, the FDA approved our new drug application (NDA) for the use of ZTALMY® (ganaxolone) oral suspension CV for the treatment of seizures associated with CDD in patients two years of age and older. ZTALMY, our first FDA approved product, became available for commercial sale and shipment in the third quarter of 2022. On July 28, 2023, the EC granted marketing authorization for ZTALMY for the adjunctive treatment of epileptic seizures associated with CDD in patients two to 17 years of age. ZTALMY may be continued in patients 18 years of age and older. We have an exclusive collaboration agreement with Orion for European commercialization of ganaxolone for ZTALMY. Orion has prepared for the expected commercial launches of ZTALMY in select European countries, and they have informed us that they will be considering the outcome of our strategic alternatives review we announced on October 24, 2024 before committing to launch timing and further launch preparations. On July 18, 2024, we announced that the China National Medical Products Administration (CNMPA) has approved ganaxolone oral suspension for the treatment of epileptic seizures in patients two years of age and older with CDD. We have a collaboration agreement with Tenacia for the commercialization of ganaxolone in Mainland China, Hong Kong, Macau and Taiwan.

We had been developing ganaxolone in formulations for two different routes of administration: IV and oral. The different formulations were intended to maximize potential therapeutic applications of ganaxolone for adult and pediatric patient populations, in both acute and chronic care. We had been pursuing the development of ganaxolone for selected indications based on the mechanism of action and clinical profile of ganaxolone. While the precise mechanism by which ganaxolone exerts its therapeutic effects in the treatment of seizures is unknown, its anticonvulsant effects are thought to result from positive allosteric modulation of the gamma-aminobutyric acid type A (GABA_A) receptor in the central nervous system. Ganaxolone is a synthetic analog of allopregnanolone, an endogenous neurosteroid, and targets both synaptic and extrasynaptic GABA_A. This unique receptor binding profile may contribute to the anticonvulsant, antidepressant and anxiolytic effects shown by neuroactive steroids in animal models, clinical trials or both.

On October 24, 2024, we announced top-line data from our Phase 3 trial in Tuberous Sclerosis Complex (TSC) clinical trial (TrustTSC). TSC is a rare, multisystem genetic disorder caused by inherited mutations in the TSC1 gene or TSC2 gene. TSC is often characterized by non-cancerous tumors, skin abnormalities, and severe neurological manifestations including refractory seizures and neurodevelopmental delays. TSC is a leading cause of genetic epilepsy. TrustTSC did not meet the primary endpoint of percent change in 28-day TSC-associated seizure frequency. As a result of the TrustTSC outcome, we discontinued further ganaxolone clinical development, other than activities required by the FDA and EMA specific to post-approval commitments of Ztalmy for CDD, and have taken additional steps to reduce costs, including an approximate 45% reduction in our workforce in the fourth quarter of 2024. We also commenced a process to explore strategic alternatives with the goal of maximizing value for our stockholders and engaged Barclays as an advisor to assist in our review of strategic alternatives. There can be no assurance that the exploration of strategic alternatives will result in any agreements or transactions, or as to the timing of any such agreements or transactions.

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In June 2024, we announced top-line results from our RAISE trial of intravenous (IV) ganaxolone for the treatment of RSE. SE is a life-threatening condition characterized by continuous, prolonged seizures or rapidly recurring seizures without intervening recovery of consciousness. If SE is not treated urgently, permanent neuronal damage may occur, which contributes to high rates of morbidity and mortality. Patients with SE who do not respond to first-line benzodiazepine treatment are classified as having Established Status Epilepticus (ESE) and those who then progress to and subsequently fail at least one second-line antiepileptic drug (AED) are classified as having RSE. The top-line results from RAISE showed that the trial met its first co-primary endpoint, a statistically significant proportion of patients had status epilepticus cessation within 30 minutes of initiating IV ganaxolone compared to placebo: 80% vs. 13%, respectively (p < 0.0001), but failed to achieve statistical significance on its second co-primary endpoint, the proportion of patients not progressing to IV anesthesia for 36 hours following initiation of IV ganaxolone compared to placebo: 63% vs. 51%, respectively (p=0.162). We continue to analyze the full RAISE trial dataset and are scheduled to meet with the FDA by the end of 2024 to discuss a potential path forward for IV ganaxolone in RSE.

Our Oral Product and Product Candidates

ZTALMY^® (ganaxolone) oral suspension CV

ZTALMY is an oral suspension given three times per day that we have developed for the treatment of CDD-associated seizures. CDD is a serious and rare genetic disorder that is caused by a mutation of the CDKL5 gene, located on the X chromosome. CDD is a severely debilitating and potentially fatal genetic condition, which occurs with an estimated frequency of 1:40,000 live births in the U.S. It predominantly affects females and is characterized by early onset, difficult to control seizures and severe neurodevelopmental impairment. The CDKL5 gene encodes proteins essential for normal brain structure and function. Most children affected by CDD have neurodevelopmental deficits such as difficulty walking, talking and taking care of themselves. Many also suffer from scoliosis, gastrointestinal dysfunction or sleep disorders. Genetic testing is available to determine if a patient has a mutation in the CDKL5 gene.

ZTALMY was approved by the FDA in March 2022 for the treatment of seizures associated with CDD in patients two years of age and older. ZTALMY, our first FDA approved product, became available for commercial sale and shipment in the third quarter of 2022. We recorded ZTALMY net product revenue of $8.5 million and $23.9 million for the three and nine months ended September 30, 2024, respectively. We recorded ZTALMY net product revenue of $5.4 million and $13.0 million for the three and nine months ended September 30, 2023, respectively. On July 28, 2023, the EC granted marketing authorization for ZTALMY for the adjunctive treatment of epileptic seizures associated with CDD in patients two to 17 years of age. ZTALMY may be continued in patients 18 years of age and older. With the EC marketing authorization granted for ZTALMY, Orion, our commercialization partner for ZTALMY in Europe, has prepared for the expected commercial launches of ZTALMY in select European countries, and they have informed us that they will be considering the outcome of our strategic alternatives review we announced on October 24, 2024 before committing to launch timing and further launch preparations. The pricing and reimbursement process can be time-consuming and may delay Orion’s commercial launch of ZTALMY in one or more European countries.

In June 2017, we were granted FDA orphan drug designation for ganaxolone for the treatment of CDD. The designation provides the drug developer with a seven-year period of U.S. marketing exclusivity, tax credits for clinical research costs, the ability to apply for annual grant funding, clinical research trial design assistance and waiver of Prescription Drug User Fee Act filing fees. In July 2020, the FDA granted Rare Pediatric Disease Designation (RPD Designation) for ganaxolone for the treatment of CDD. The FDA grants RPD Designation for diseases that affect fewer than 200,000 people in the U.S. and in which the serious or life-threatening manifestations occur primarily in individuals 18 years of age and younger. Upon FDA approval of ZTALMY for CDD in March 2022, the FDA awarded us a Rare Pediatric Disease Priority Review Voucher (PRV), which we monetized in August 2022 for $110.0 million in cash. In August 2022, we received a letter from Purdue Neuroscience Company (Purdue) in which Purdue claimed that it was owed $5.5 million by us from the sale of the PRV pursuant to the Purdue License Agreement. We responded to Purdue that we did not agree with their claim. In February 2024, following discussions with Purdue, we agreed to pay Purdue $4.0 million in respect of its claim. The first $2.0 million installment was paid to Purdue in March 2024, and the second $2.0 million installment was paid in June 2024.

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In November 2019, the European Medicines Agency’s (EMA) Committee for Orphan Medicinal Products (COMP) granted orphan drug designation for ganaxolone for the treatment of CDD. Prior to the grant of the marketing authorization, the COMP was required to determine whether the orphan drug designation criteria were still met. On May 26, 2023, the COMP provided a positive opinion to maintain the orphan drug designation for ganaxolone for CDD in the EU.

The U.S. and EC approvals of ZTALMY for CDD are based on data from a Phase 3 double-blind placebo-controlled trial (Marigold Trial), in which 101 patients were randomized and treated with ZTALMY. Clinical trial patients receiving ZTALMY showed a median 30.7% reduction in 28-day major motor seizure frequency, compared to a median 6.9% reduction for those receiving placebo, achieving the trial’s primary endpoint (p=0.0036). At two years in the open label extension phase of the Marigold Trial, patients (n=50) treated with ZTALMY experienced a median 48.2% reduction in major motor seizure frequency. These data suggest that patients who remain on treatment long-term may demonstrate continued reductions in seizure frequency. The most common adverse events (AEs) in the double-blind portion of the Marigold Trial were somnolence (36.0% in the ganaxolone group compared to 15.7% in the placebo group), pyrexia (18.0% and 7.8%, respectively) and salivary hypersecretion (6.0% and 2.0%, respectively).

We own families of patents and pending patent applications that claim certain formulations of ganaxolone and cover certain therapeutic uses of ganaxolone, including for treating CDD. The 20-year terms for patents, and applications that issue as patents, in these families run from 2026 through 2042, absent any available patent term adjustments or extensions. We have also licensed from Ovid certain patents that claim certain therapeutic uses of ganaxolone for the treatment of CDD. The licensed patents include a granted U.S. patent, and pending applications in the U.S. and Europe. The 20-year term for these licensed patents and applications that issue as patents will run through 2037, absent any available patent term adjustments.

U.S. Commercial Strategy. Since ZTALMY was approved by the FDA, we have been focused on the implementation and execution of an integrated launch plan to make ZTALMY available to CDD patients in the U.S. through a specialty pharmacy. Key commercial strategies have included and continue to include: (1) executing our supply chain network and quality management system to assure product is available to patients; (2) driving clinical awareness of ZTALMY as the first and only FDA approved product indicated specifically for seizures associated with CDD; (3) deploying our field sales force to target physicians who treat this rare pediatric patient population; (4) engaging commercial and government payers with the objective of obtaining insurance coverage; and (5) enhancing our internal capabilities (such as Finance, Human Resources, Information Technology, Data Analytics and Compliance) to support our first launch as a commercial company.

U.S. Marketing Strategy. Our marketing strategy in the U.S. is to reinforce that seizures are central to the constellation of CDD symptoms, establish ZTALMY as central to the comprehensive management of seizures associated with CDD, and ensure that patients have seamless access to ZTALMY from prescription through fulfillment. Our marketing campaign for ZTALMY is active, and our integrated commercial launch activities initiated in the third quarter of 2022.

U.S. Sales Strategy. Our U.S. commercial strategy divides our sales territories into 16 U.S. territories where our experienced regional account managers target key accounts and centers of excellence for CDD. Based on market research, we estimate the addressable patient population for ZTALMY for CDD in the U.S. is approximately 2,000 pediatric patients. As this is the first product approved by the FDA specifically for seizures associated with CDD and the International Classification of Diseases, Tenth Revision (ICD10) code for CDD was established in 2021, there is limited data available for this specific market.

U.S. Market Access. We have established a payer and reimbursement account team with the objective of obtaining and maintaining reimbursement (coverage) of ZTALMY in the U.S. We are focusing our efforts on reimbursement from commercial payers where pharmacy benefit managers (PBMs) control the majority of commercial pharmacy-benefit lives and government payers, primarily Medicaid for the target population for CDD. We expect approximately 50% of the CDD patient population will access primary coverage through Fee-for-Service or Managed Medicaid, with the remaining approximately 50% accessing primary coverage through commercial payers, with the top PBMs having significant influence. The prescribing and fulfillment process for ZTALMY in the U.S. is managed

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through ZTALMY One™, a comprehensive patient support program. Enrollment in the program offers various support and information to help caregivers and patients prescribed ZTALMY access their ZTALMY prescription and assist in determining eligibility for and access to co-pay support or free drug programs.

U.S. Specialty Pharmacy. We are utilizing Orsini Pharmaceutical Services, LLC (Orsini), a specialty pharmacy, to provide services for patients in the U.S., including patient enrollment, benefit verification and investigation, prior authorization support, patient education and drug counseling, dispensing of product and shipment coordination.

U.S. Specialty Distributor. We are utilizing ASD Specialty Healthcare, LLC (ASD), a specialty distributor, to provide distribution services in the U.S. in connection with ZTALMY to institutional inpatient pharmacies, U.S. governmental customers, including any Department of Veterans Affairs or Department of Defense sites, and Kaiser Permanente facilities.

Infrastructure. We continue to enhance our internal capabilities and processes to support a commercial-stage company. We have implemented a healthcare compliance program to guide our compliance with rules and regulations regarding pharmaceutical sales.

Manufacture of Commercial Supply. We have executed commercial supply agreements for ganaxolone active pharmaceutical ingredient (API) with our current manufacturer and also with our current supplier for finished bulk drug product. Additionally, we have executed a master supply agreement with a second API supplier to undertake certain process development activities and potentially provide commercial supplies of API and/or API intermediates.

Regulated as a Controlled Substance in the U.S. On June 1, 2022, the Drug Enforcement Agency (DEA) published an interim final rule in the Federal Register placing ganaxolone and its salts in schedule V of the Controlled Substances Act (CSA), which rule became final December 9, 2022. Under the CSA, drugs are classified into five (5) distinct categories or schedules depending upon the drug’s acceptable medical use and the drug’s abuse or dependency potential. Schedule V is defined by the DEA as drugs with lower potential for abuse than schedule IV and consist of preparations containing limited quantities of certain narcotics. ZTALMY became available for commercial sale and shipment in the third quarter of 2022. As a controlled substance, ganaxolone is subject to the applicable CSA requirements such as registration, security, recordkeeping and reporting, storage manufacturing, distribution, importation and other requirements.

FDA Post-Marketing Requirements. In connection with FDA approval of ZTALMY for CDD, we have several post-marketing commitments. The Phase 1 renal impairment study commitment was submitted to the FDA in May 2022, the Phase 1 hepatic impairment study and the thorough QTc study were submitted to the FDA in December 2022, the extractable/leachable study results on the container closure system were submitted to the FDA in July 2023, the M17 in vitro drug-drug interaction (DDI) study was submitted in August 2023, and the M17 in vivo PK study with Brain Penetrance was submitted in December 2023. The remaining post-marketing requirements include: 2-year carcinogenicity studies of ganaxolone and the major human unconjugated plasma metabolite, M2, in rats; a 26-week carcinogenicity of ganaxolone in transgenic mice; and a juvenile animal toxicity study of M2 in rats. We expect to be able to complete these remaining required FDA studies and are working with the FDA with respect to the timing of their completion and submission. While we have discontinued further ganaxolone clinical development, we will continue to complete activities required by the FDA specific to post-approval commitments of Ztalmy for CDD.

Managed Access Program (MAPS). We have a global managed access program with Uniphar Durbin Ireland LTD to support physician access to ZTALMY for appropriate patients with seizures associated with CDD in geographies where there is no available patient access, local regulatory criteria and program eligibility are satisfied, and we do not already have a commercial distribution relationship in place.

Marketing Authorization Application

In August 2021, the Committee for Medicinal Products for Human Use (CHMP) of the EMA granted our request for accelerated assessment of ganaxolone for the treatment of seizures associated with CDD. The marketing authorization application (MAA) for ganaxolone was submitted to the EMA on October 11, 2021, and on October 28,

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2021, we received formal notification from the EMA that the CDD MAA was validated. With this validation, the EMA began its formal review of the MAA under the centralized procedure. On May 26, 2023, the CHMP adopted a positive opinion recommending approval of ZTALMY. On July 28, 2023, the EC approved ZTALMY oral suspension for the adjunctive treatment of epileptic seizures associated with CDD in patients two to 17 years of age. ZTALMY may be continued in patients 18 years of age and older. The EC decision is applicable to all 27 EU member states plus Iceland, Norway and Liechtenstein. ZTALMY is the first treatment in the EU indicated for the treatment of seizures associated with CDD.

EC Post-Authorization Measures. In connection with the EC approval of ZTALMY for CDD, we have several post-marketing authorization measures. The clinical study report (CSR) for Study 1042-HME-1001 was submitted in September 2023. The ganaxolone Steady-State Metabolite Study report, the final Study 1042-CDD-3001 CSR with the open-label trial completion, the M17 in vitro DDI study, and the M17 in vivo PK study with Brain Penetrance were submitted in December 2023. The updated Environmental Risk Assessment, including a Sediment Dwelling Organism toxicity study, was submitted in February 2024. The remaining post-marketing authorization measures include: participating in Study LLF001 (CANDID observational study) and providing annual updates; participating in the CDD-IPR-CDD-0 CDKL5 Deficiency Disorder International Patient Registry and providing six monthly updates; developing a sodium benzoate-free suspension and assessing the compatibility of the oral suspension with food, drinks, enteral tubes, shake time and stand time; conducting a 26-Week Oral Gavage Toxicity Study of M2; conducting a M2 Embryo-fetal Development study; and conducting a 26-week Oral Gavage Carcinogenicity Study of ganaxolone and M2. The EMA also requested weight of evidence (WoE) assessments to evaluate the need for a 2-year carcinogenicity study in rats with ganaxolone, a 2-year carcinogenicity study in rats with M2, and a juvenile toxicity study with M2. We expect to be able complete the remaining required studies and are working with the EMA with respect to the timing of their completion and submission. While we have discontinued further ganaxolone clinical development, we will continue to complete activities required by the EMA specific to post-approval commitments of Ztalmy for CDD.

Ganaxolone for CDD approved by the China National Medical Products Administration

On July 18, 2024, we announced that the CNMPA approved ganaxolone oral suspension for the treatment of epileptic seizures in patients two years of age and older with CDD. In November 2022, we entered into a collaboration agreement with Tenacia which granted Tenacia the right to develop and commercialize ganaxolone in Mainland China, Hong Kong, Macau and Taiwan in exchange for royalties and other payments associated with net sales and commercial and regulatory milestones.

Tuberous Sclerosis Complex (TSC)

TSC is a rare genetic disorder that causes non-malignant tumors in the brain, skin, kidney, heart, eyes, and lungs. Rarely, patients may develop malignant tumors of the kidney, breast or thyroid gland. The condition is caused by inherited mutations in either the TSC1 or TSC2 gene. It occurs with a frequency of approximately 1:6,000 live births, with a genetic mutation being found in 85% of patients. While the disease phenotype can be extremely variable, epilepsy occurs with a frequency of up to 85%. TSC is a leading cause of genetic epilepsy, often manifesting in the first year of life as either focal seizures or infantile spasms. There are currently few disease-specific treatments approved for seizures in TSC. Orphan drug designation for ganaxolone for the treatment in TSC was granted by the FDA in August 2021 and by the EMA in October 2021.

On October 24, 2024, we announced top-line data from the TrustTSC trial. The trial did not meet the primary endpoint of percent change in 28-day TSC-associated seizure frequency. The top-line data demonstrated that TrustTSC did not achieve statistical significance on its primary endpoint of percent reduction in 28-day frequency of TSC-associated seizures: median reduction was 19.7% for ganaxolone compared with 10.2% for placebo (p=0.09). In this trial, ganaxolone was generally well-tolerated with a safety profile consistent with previous clinical trials. In this trial, the most frequent adverse event was somnolence: 28.1% for ganaxolone compared with 16.9% for placebo. As a result of the TrustTSC outcome, we discontinued further ganaxolone clinical development, other than activities required by the FDA and EMA specific to post-approval commitments of Ztalmy for CDD, and have taken additional steps to reduce costs, including an approximate 45% reduction in our workforce in the fourth quarter of 2024. We also commenced a process to explore strategic alternatives with the goal of maximizing value for our stockholders and engaged Barclays as

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an advisor to assist in our review of strategic alternatives. There can be no assurance that the exploration of strategic alternatives will result in any agreements or transactions, or as to the timing of any such agreements or transactions.

In July 2023, the U.S. Patent and Trademark Office (USPTO) granted us a patent (U.S. Patent No. 11,701,367) on certain methods for treating TSC-related epilepsy by administering oral ganaxolone. This issued patent expires in 2040. In May 2024, the USPTO granted us a second patent (U.S. Patent No. 11,980,625) on methods for treating TSC-related epilepsy by administering oral ganaxolone. This issued patent expires in 2040. In October 2024, the USPTO granted us a patent (U.S. Patent No. 12,115,169) for ZTALMY ^® (ganaxolone) oral titration regimens covering the treatment of a range of epilepsy disorders, including CDD, TSC and LGS. This issued patent expires in 2042. We continue to prosecute patent applications in this family relating to certain therapeutic regimens for the treatment of TSC.

Other Oral Development for Ganaxolone

We had plans to pursue the development of ganaxolone in Lennox-Gastaut Syndrome (LGS), other epileptic encephalopathies, and prodrug formulations. As a result of the TrustTSC results, we have discontinued further ganaxolone clinical development, other than activities required by the FDA and EMA specific to post-approval commitments of Ztalmy for CDD.

Our IV Product Candidates

Status Epilepticus (SE)

SE is a life-threatening condition characterized by continuous, prolonged seizures or rapidly recurring seizures without intervening recovery of consciousness. If SE is not treated urgently, permanent neuronal damage may occur, which contributes to high rates of morbidity and mortality. Patients with SE who do not respond to first-line benzodiazepine treatment are classified as having ESE and those who then progress to and subsequently fail at least one second-line AED are classified as having RSE. In RSE, synaptic GABA_A receptors are internalized into the neuron, resulting in decreased responsiveness to drugs such as benzodiazepines. RSE unresponsiveness to one or more second-line AEDs may require treatment with IV anesthesia to terminate seizures and prevent neuronal injury and other complications. The IV anesthetic is increased to a level that induces deep coma and is maintained at that rate for 24 hours or more. SE that recurs following an attempted wean of IV anesthesia is classified as super refractory status epilepticus (SRSE). In April 2016, we were granted FDA orphan drug designation for the IV formulation of ganaxolone for the treatment of SE, which includes RSE.

In January 2021, we enrolled the first patient in the RAISE trial, a randomized, double-blind, placebo-controlled trial in patients with RSE, who have failed two or more antiseizure medications. The RAISE trial has approximately 70 trial sites, primarily in the U.S. and Canada. It was designed to enroll approximately 124 patients who were randomized to receive ganaxolone or placebo added to standard of care. We reached alignment with the FDA on a protocol amendment, including a proposal for an interim analysis when two-thirds of the patients (approximately 82) had completed assessment of the primary and key secondary trial endpoints. The enrollment target for the interim analysis was completed in the first quarter of 2024. On April 15, 2024, we announced that the trial did not meet the pre-defined interim analysis stopping criteria on the co-primary endpoints. We decided to complete enrollment in the RAISE trial at 100 patients. On June 17, 2024, we announced top-line results, which showed that the trial met its first co-primary endpoint, with a statistically significant proportion of patients achieving SE cessation within 30 minutes of initiating IV ganaxolone compared to placebo: 80% vs. 13%, respectively (p< 0.0001). However, the trial failed to achieve statistical significance on its second co-primary endpoint, the proportion of patients not progressing to IV anesthesia for 36 hours following initiation of IV ganaxolone compared to placebo: 63% vs. 51%, respectively (p=0.162). The incidence of SAEs was similar between the treatment and placebo arms (n=19 for IV ganaxolone, n=18 for placebo), with hypotension being more commonly seen in the IV ganaxolone arm. Other secondary endpoints, including escalation of treatment with either IV ASMs or IV anesthesia within 24 hours and reduction in electroencephalogram (EEG) seizure burden at 36 hours, favored ganaxolone. We continue to analyze the full RAISE trial dataset and are scheduled to meet with the FDA by the end of 2024 to discuss a potential path forward for IV ganaxolone in RSE.

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To date, we have provided IV ganaxolone for treatment of SRSE in 34 patients under emergency IND applications. As a result of the TrustTSC outcome, we discontinued further ganaxolone clinical development, other than activities required by the FDA and EMA specific to post-approval commitments of Ztalmy for CDD, and have taken additional steps to reduce costs, including an approximate 45% reduction in our workforce in the fourth quarter of 2024. As a result, we are no longer accepting requests for SRSE emergency IND applications.

We commenced a separate Phase 3 RSE trial to support an MAA in Europe (RAISE II) in 2023. In the second quarter of 2024, we decided to discontinue the RAISE II trial.

On September 7, 2021, the USPTO granted us a patent (U.S. Patent No. 11,110,100) on a method of treating SE which includes claims related to our clinical therapeutic regimen for the treatment of SE using IV ganaxolone. This issued patent expires in 2040. That patent is a member of a patent family we own that includes pending patent applications that claim certain therapeutic regimens for the treatment of SE, including RSE, using intravenous ganaxolone. The USPTO granted us a second patent for SE on June 20, 2023 (U.S. Patent No.11,679,117) with claims that cover therapeutic regiments in which high doses of ganaxolone are administered, which we believe is relevant for some patients, and strengthens our intellectual property portfolio for the treatment of SE, including SRSE, using ganaxolone.

In July 2022, the USPTO issued U.S. Patent No. 11,395,817 (Ovid ‘817 Patent) to Ovid Therapeutics, Inc. (Ovid) with claims that may encompass our product candidate for the treatment of SE. On March 15, 2023, we filed a petition seeking post-grant review (PGR) of the Ovid ‘817 Patent with the USPTO Patent Trial and Appeal Board (PTAB). Our petition for PGR argued that the claims of the Ovid ‘817 Patent are unpatentable on multiple grounds. Ovid filed a preliminary response to our petition on June 20, 2023. In Ovid’s reply to our request for PGR, Ovid disclaimed claims 1-21, 23 and 24 of the Ovid ‘817 Patent, which has the effect of erasing these claims from the patent, irrespective of the outcome of the PGR. On August 17, 2023, the PTAB issued a decision granting institution of our petition seeking PGR of the Ovid ‘817 Patent. In instituting the PGR, the PTAB stated that it was more likely than not that we would be able to invalidate the remaining claims (22 and 25-31) of the Ovid ‘817 Patent during the proceeding. On August 1, 2024, the PTAB issued its final written decision on the PGR (Marinus Pharms., Inc. v. Ovid Therapeutics, Inc., PGR2023-00020, Paper 41 (Aug. 1, 2024)), concluding that all remaining claims—claims 22 and 25-31—were unpatentable as obvious. The decision is publicly available on the Patent Office’s website (PTAB Open Data (uspto.gov)). This decision was not appealed by Ovid within the appeal period. As a result of the PTAB decision, the Ovid patent ‘817 is invalid and cannot be asserted against Marinus in any future proceeding.

On March 24, 2024, Ovid filed an Inter Partes Review (IPR) challenge of one of our patents for the use of ganaxolone in treating SE and RSE (U.S. Patent No. 11,110,100). We filed our preliminary response to the IPR on June 26, 2024. Following our response, the PTAB had 3 months to determine whether or not to institute the Ovid IPR. On September 20, 2024, the PTAB issued a decision denying institution of the IPR, stating that Ovid had not established a reasonable likelihood that it would prevail in showing the unpatentability of at least one claim challenged in the petition. Ovid did not choose to file for rehearing or seek director review at the PTAB within 30 days from the September 20, 2024 PTAB decision date. As a result, the decision of the PTAB denying institution of the IPR is final. Ovid cannot appeal the denial of institution to the U.S. Court of Appeals for the Federal Circuit.

Operations

Our operations to date have consisted primarily of organizing and staffing our company, developing ganaxolone, including conducting preclinical studies and clinical trials, raising capital, partnering ZTALMY in certain geographies and the early commercialization of ZTALMY. We have funded our operations primarily through sales of equity and debt securities. We recorded $8.5 million and $23.9 million of ZTALMY net sales in the three and nine months ended September 30, 2024, respectively. We recorded $5.4 million and $13.0 million of ZTAMLY net sales in the three and nine months ended September 30, 2023, respectively. Since inception, we have incurred negative cash flows from our operations, and other than for the three months ended September 30, 2022 due to a one-time net gain from the sale of our PRV, we have incurred net losses. We have generated limited product revenues, and there is no assurance that profitable operations will be achieved in the future, and if achieved, could be sustained on a continuing basis. We incurred Net losses of $24.2 million and $98.7 million for the three and nine months ended September 30,

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2024, respectively. We incurred Net losses of $33.0 million and $99.6 million for the three and nine months ended September 30, 2023. Our accumulated deficit as of September 30, 2024 was $670.6 million.

We anticipate that we will continue to incur substantial losses in future periods as we:

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maintain sales, marketing and distribution capabilities to continue to commercialize ganaxolone;

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conduct other preclinical studies and clinical trials to support required FDA and EMA post-marketing requirements for the CDD indication; and

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maintain and protect our global intellectual property portfolio; and

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continue and complete a process to explore strategic alternatives with the goal of maximizing value for our stockholders.

We had Cash and cash equivalents of $42.2 million as of September 30, 2024. We believe that our existing cash and cash equivalents as of September 30, 2024 will be sufficient to fund our operating expenses and capital expenditure requirements into the second quarter of 2025. This expectation includes cost reduction activities that were implemented in the second and fourth quarters of 2024. As a result of the TrustTSC outcome, we discontinued further ganaxolone clinical development, other than activities required by the FDA and EMA specific to post-approval commitments of Ztalmy for CDD, and have taken additional steps to reduce costs, including an approximate 45% reduction in our workforce in the fourth quarter of 2024. We also commenced a process to explore strategic alternatives with the goal of maximizing value for our stockholders and engaged Barclays as an advisor to assist in our review of strategic alternatives. There can be no assurance that the exploration of strategic alternatives will result in any agreements or transactions, or as to the timing of any such agreements or transactions. We will need to secure additional funding in the future, from one or more equity or debt financings, government funding, collaborations, licensing transactions, other commercial transactions or other sources in order to carry out all of our commercialization activities with respect to ganaxolone.

Financial Overview

Product Revenue, net

Our first FDA approved product, ZTALMY, became available for commercial sale and shipment in the third quarter of 2022. We have three customers, one of which, Orsini, a specialty pharmacy that dispenses ZTALMY directly to patients, represents approximately 98% of our ZTALMY revenue to date. Our contract with Orsini has a single performance obligation to deliver ZTALMY upon receipt of a purchase order, which is satisfied when Orsini receives ZTALMY. We recognize ZTALMY revenue at the point in time when control of ZTALMY is transferred to Orsini, which is upon delivery to Orsini. The transaction price that we recognize for ZTALMY revenue includes an estimate of variable consideration. Shipping and handling costs to Orsini are recorded as selling, general and administrative expenses. The components of variable consideration include:

Trade Discounts and Allowances. We provide contractual discounts, including incentive prompt payment discounts and chargebacks. Each of these potential discounts are recorded as a reduction of ZTALMY revenue and accounts receivable in the period in which the related ZTALMY revenue is recognized. We estimate the amount of variable consideration for discounts and allowances using the expected value method.

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Government Rebates. We are subject to discount obligations under state Medicaid programs, Medicare, and the Tricare Retail Refund Program. We estimate reserves related to these discount programs and record these obligations in the same period the related Product revenue is recognized, resulting in a reduction of Product revenue.

Patient Assistance. We offer a voluntary co-pay patient assistance program intended to provide financial assistance to eligible patients with a prescription drug co-payment required by payors and coupon programs for cash payors. The calculation of the current liability for this assistance is based on an estimate of claims and the cost per claim that we expect to receive associated with ZTALMY that has been recognized as Product revenue but remains in the distribution channel inventories at the end of each reporting period.

Federal Contract Revenue

In September 2020, we entered into a contract (BARDA Contract) with the Biomedical Advanced Research and Development Authority (BARDA), a division of the U.S. Department of Health and Human Services’ Office of the Assistant Secretary for Preparedness and Response. Under the BARDA Contract, we received an award of up to an estimated $51 million for development of IV-administered ganaxolone for the treatment of RSE. The BARDA Contract provides for funding to support, on a cost-sharing basis, the completion of a Phase 3 clinical trial of IV-administered ganaxolone in patients with RSE, which covers the RAISE trial, funding of preclinical studies to evaluate IV-administered ganaxolone as an effective treatment for RSE due to chemical nerve gas agent exposure, and funding of certain ganaxolone manufacturing scale-up and regulatory activities. In March 2022, we entered into an amendment with BARDA to extend the end date of our base performance period for funding under the BARDA Contract from September 1, 2022 to December 31, 2023. In September 2022, we entered into an amendment with BARDA that, among other things, (i) provides for the exercise of BARDA’s option under the BARDA Contract to support U.S. onshoring of the manufacturing capabilities for ganaxolone API (Option 2), (ii) changes the end date of our performance period under Option 2 from December 31, 2026 to July 31, 2025, (iii) increases the government cost share amount under Option 2 from approximately $11.5 million to approximately $12.3 million, and (iv) increases our cost share amount under Option 2 from approximately $4.9 million to approximately $5.3 million. In September 2023, we entered into an amendment with BARDA to extend the end date of our base performance period for funding under the BARDA Contract from December 31, 2023 to September 30, 2024.

The BARDA Contract consists of an approximately four-year base period, including the extension periods, during which BARDA agreed to provide up to approximately $21 million of funding for the RAISE trial on a cost share basis and funding of additional preclinical studies of ganaxolone in nerve agent exposure models. As of December 31, 2023, the entire base period funding of approximately $21 million had been recorded. Following successful completion of the RAISE trial and preclinical studies in the contract period, the BARDA Contract provides for approximately $31 million of additional BARDA funding for three options in support of ganaxolone manufacturing, supply chain, clinical, regulatory and toxicology activities, including the $12.3 million exercise of Option 2 as described above. Under the BARDA Contract, we will be responsible for cost sharing in the amount of approximately $33 million and BARDA will be responsible for approximately $52 million if all development options are completed. The contract period-of-performance (base period plus option exercises) is up to approximately five years.

We recognize Federal contract revenue from the BARDA Contract in the period in which the allowable research and development expenses are incurred. We expect Federal contract revenue to decrease as the entire base period funding of approximately $21 million had been recorded as of December 31, 2023. As such, funding is currently limited to Option 2, which supports onshoring of the manufacturing capabilities for ganaxolone API.

Collaboration Revenue

In July 2021, we entered into a collaboration agreement (Orion Collaboration Agreement) with Orion. Under the terms of the Orion Collaboration Agreement, we granted Orion an exclusive, royalty-bearing, sublicensable license to certain of our intellectual property rights with respect to commercializing biopharmaceutical products incorporating ganaxolone (Licensed Products) in the European Economic Area, the United Kingdom and Switzerland (collectively, the Territory) for the diagnosis, prevention and treatment of certain human diseases, disorders or conditions (Field), initially in the indications of CDD, TSC and RSE.

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Under the terms of the Orion Collaboration Agreement, we received a €25.0 million ($29.6 million at then-existing exchange rate) upfront payment from Orion in July 2021. We are eligible to receive up to an additional €97 million in R&D reimbursement and cash milestone payments based on specific clinical and commercial achievements. Also, as part of the overall arrangement, we have agreed to supply the Licensed Products to Orion at an agreed upon price.

We identified the following commitments under the arrangement: (i) exclusive rights to develop, use, sell, have sold, offer for sale and import any product comprised of Licensed Product (License); (ii) development and regulatory activities (Development and Regulatory Activities); and (iii) requirement to supply Orion with the Licensed Product at an agreed upon price (Supply of Licensed Product). We determined that these three commitments represent distinct performance obligations for purposes of recognizing revenue and will recognize license and collaboration revenue or a reduction of expense as we fulfill each performance obligation.

On November 16, 2022, we entered into a Collaboration and Supply Agreement (Tenacia Collaboration Agreement) with Tenacia Biotechnology (Shanghai) Co., Ltd. (Tenacia). Under the terms of the Tenacia Collaboration Agreement, we granted Tenacia an exclusive, royalty-bearing, sublicensable license to certain of our intellectual property rights to develop, commercialize and otherwise exploit certain products incorporating certain oral and intravenous formulations of the our product candidate ganaxolone (Licensed Products) in Mainland China, Hong Kong, Macau and Taiwan (collectively, Territory) for the diagnosis, prevention and treatment of certain human diseases, disorders or conditions (Field), initially for the treatment of CDD, TSC and SE (including RSE) (collectively, Initial Indications). The collaboration can be expanded to include additional indications and formulations of ganaxolone pursuant to a right of first negotiation.

Under the terms of the Tenacia Collaboration Agreement, Tenacia agreed to pay us an upfront cash payment of $10 million (Upfront Fee) within forty-five (45) days after the Effective Date, which was received in December 2022. In addition to the Upfront Fee, Tenacia has agreed to make cash payments to us upon the achievement of certain development, regulatory and sales-based milestones related to (i) the Initial Indications and (ii) the first new formulation or pro-drug of ganaxolone or any back-up compound of ganaxolone in a new indication (Selected Product) for which the parties amend the Tenacia Collaboration Agreement in connection with Tenacia’s exercise of its right of first negotiation and for which there is no other Licensed Product approved in China (for clarity, the milestone payments under this clause (ii) will only apply to one Selected Product), up to an aggregate amount of $256 million. Of the milestones, $15 million relates to regulatory approvals with separate milestones related to each of oral and intravenous formulations and the Selected Product, and an aggregate of $241 million of sales-based milestones are connected to annual revenue thresholds specific to each of the oral, intravenous and Selected Product formulations of ganaxolone. Tenacia has further agreed to pay us tiered royalty payments based on annual net sales of Licensed Products ranging from the low double digits to the mid-teens for each of the oral formulation, intravenous formulation and Selected Product formulation of Licensed Products. Tenacia’s obligations to pay royalties to us with respect to sales of a Licensed Product in each particular jurisdiction of the Territory will commence on the date of first commercial sale in such jurisdiction and expire upon the latest of (i) ten years following the first commercial sale of such Licensed Product in such jurisdiction, (ii) the expiration of the last-to-expire valid claim of any licensed patent rights that covers such Licensed Product in such jurisdiction and (iii) the expiration of all regulatory exclusivities for such Licensed Product in such jurisdiction. Royalty payments are subject to reduction in specified circumstances as set forth in the Tenacia Collaboration Agreement, including if net sales decrease by a certain percentage after the introduction of a generic product.

Tenacia will be primarily responsible for the development of Licensed Products in the Territory and regulatory interactions related thereto, including conducting and sponsoring clinical studies in the Field in the Territory to support regulatory filings in the Territory. All regulatory approvals filed by Tenacia in the Territory will be in the name of and owned by us unless otherwise required by applicable law, in which case such regulatory approvals would be in the name of and owned by Tenacia for the benefit of us. We and Tenacia agreed to enter into clinical and commercial supply agreements pursuant to which we will supply Tenacia with its requirements of Licensed Products necessary for Tenacia to develop and commercialize Licensed Products in the Field in the Territory. The parties entered into one such clinical and commercial supply agreement in May 2023. The agreement contains pricing, delivery, acceptance, payment, termination, forecasting, and other terms consistent with the Tenacia Collaboration Agreement, as well as certain quality assurance, indemnification, liability and other standard industry terms. Tenacia will be responsible for, at Tenacia’s sole

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cost and expense, obtaining regulatory approval and commercializing the Licensed Product in the Field in Mainland China. Tenacia enrolled patients in our Phase 3 randomized, double blind, placebo-controlled trial (TrustTSC trial) of adjunctive ganaxolone.

In accordance with the guidance, we identified the following commitments under the arrangement: (i) grant to Tenacia the exclusive rights to develop, commercialize and otherwise exploit Licensed Product in the Field in the Territory (License) and (ii) requirement to supply Tenacia with the Licensed Product at an agreed upon price (Supply of Licensed Product). We determined that these two commitments represent distinct performance obligations for purposes of recognizing revenue or reducing expense, which we will recognize such revenue or expense, as applicable, as we fulfill these performance obligations.

We have also entered into agreements for commercialization of ganaxolone in other territories with (i) NovaMedica LLC (NovaMedica), whereby NovaMedica has the right to market and sell ganaxolone in Armenia, Azerbaijan, Belarus, Georgia, Kazakhstan, Kyrgyzstan, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine and Uzbekistan, and (ii) Biologix FZCo (Biologix), whereby Biologix has the right to distribute and sell ganaxolone in Algeria, Bahrain, Egypt, Iraq, Jordan, Kingdom of Saudi Arabia, Kuwait, Lebanon, Libya, Morocco, Oman, Qatar, Tunisia and United Arab Emirates. In exchange for these rights, we will be the exclusive supplier of our products to NovaMedica and Biologix on terms set forth in the respective agreements in exchange for a negotiated purchase price for the products. As of the first quarter of 2023, we had initiated limited sales of ZTALMY to NovaMedica to support on-going early access programs associated with patients from the Marigold Trial. We are in the process of initiating a global managed access program with Uniphar Durbin Ireland LTD to support physician access to ZTALMY for appropriate patients with seizures associated with CDD in geographies where there is no available patient access, local regulatory criteria and program eligibility are satisfied, and we do not already have a commercial distribution relationship in place. We continue to assess opportunities in other markets to further expand the distribution and commercialization of ganaxolone globally.

Research and Development Expenses

Our research and development expenses consist primarily of costs incurred for the development of ganaxolone, which include:

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employee-related expenses, including salaries, benefits, travel and stock-based compensation expense;

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expenses incurred under agreements with clinical research organizations (CROs) and investigative sites that conduct our clinical trials and preclinical studies;

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the cost of acquiring, developing and manufacturing clinical trial materials;

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facilities, depreciation and other expenses, which include direct and allocated expenses for rent and maintenance of facilities, enterprise technology, and other supplies;

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costs associated with preclinical activities and regulatory operations; and

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costs associated with developing new formulations and prodrugs of ganaxolone.

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We expense research and development costs when we incur them. We record costs for some development activities, such as clinical trials, based on an evaluation of the progress to completion of specific tasks using data such as patient enrollment, clinical site activations and information our vendors provide to us.

We have incurred substantial costs beyond our clinical trials in order to file an NDA and Supplemental NDAs, or MAAs outside the U.S., for ganaxolone for various clinical indications, and in each case, the nature, design, size and cost of further clinical trials and other studies have depended in large part on the outcome of preceding studies and trials and discussions with regulators. It is difficult to determine with certainty the costs and duration of clinical trials and preclinical studies, or if, when or to what extent we will generate revenue from the commercialization and sale of ganaxolone if we obtain regulatory approval in other indications. We may never succeed in achieving regulatory approval for ganaxolone in other indications and, if approved, we may not be successful in commercialization of ganaxolone in other indications.

In addition, the probability of success for our clinical programs has depended on numerous factors, including competition, manufacturing capability and commercial viability. See the Risk Factors section of our Annual Report on Form 10-K filed on March 5, 2024 for more information with respect to such factors. Our continued commercial success depends upon attaining significant market acceptance, if approved, among physicians, patients, healthcare payers and the medical community.

Selling, General and Administrative Expenses

Selling, general and administrative expenses consist principally of salaries and related costs for executive, commercial and other administrative personnel and consultants, including stock-based compensation and travel expenses. Other Selling, general and administrative expenses include professional fees for commercial, legal, patent review, consulting and accounting services. Selling, general and administrative expenses are expensed when incurred.

Restructuring Costs

Restructuring costs primarily consist of severance payments, employee benefits and related costs, as well as noncash stock compensation expense and contract termination costs. Restructuring costs are expensed when incurred.

Cost of Product Revenue

Cost of product revenue includes the cost of inventory sold, which includes direct manufacturing and supply chain costs. Also included in Cost of product revenue are royalty payments owed to Purdue Neuroscience Company (Purdue) and Ovid in accordance with the respective license agreements. We began capitalizing Inventory related to ZTALMY subsequent to the March 2022 FDA approval of ZTALMY, as the related costs were expected to be recoverable through the commercialization and subsequent sale of ZTALMY. Prior to FDA approval of ZTALMY, costs estimated at approximately $2.0 million for commercially saleable product and materials were incurred and included in Research and development expenses. As a result, Cost of product revenues related to ZTALMY initially reflected a lower average per unit cost of materials, and continued to do so into the second quarter of 2024, as previously expensed inventory was utilized for commercial production and sold to customers. We expect Cost of product revenues related to ZTALMY to begin to reflect the current on-going average per unit cost of materials for the remainder of 2024 and thereafter.

Interest Income

Interest income consists principally of interest earned on Cash and cash equivalents and Short-term investments balances.

Interest Expense

Interest expense consists of interest expense and amortization of debt discount related to our Notes Payable and our Revenue Interest Financing Payable.

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Other Income, net

Other income and expense consist principally of non-operational transactions, including research and development tax credits, gains or losses on disposal of fixed assets held for sale, foreign currency transactions, and fair value adjustments.

Results of Operations

Product Revenue, net

We recognized $8.5 million and $5.4 million of ZTALMY net product revenue for the three months ended September 30, 2024 and September 30, 2023, respectively. We recognized $23.9 million and $13.0 million of ZTALMY net product revenue for the nine months ended September 30, 2024 and September 30, 2023, respectively. The increases in the both the three and nine months ended September 30, 2024 compared to the 2023 periods were primarily due to an increase in patients in the three and nine months ended September 30, 2024 as ZTALMY had only recently become available for commercial sale and shipment in the comparable 2023 periods.

Federal Contract Revenue

We recognized $0.1 million and $1.9 million of federal contract revenue for the three months ended September 30, 2024 and September 30, 2023, respectively, as a result of the BARDA Contract. We recognized $0.3 million and $10.8 million of federal contract revenue for the nine months ended September 30, 2024 and September 30, 2023, respectively, as a result of the BARDA Contract. The decreases in both the three and nine months ended September 30, 2024 compared to the 2023 periods primarily related to expenses incurred in connection with validation of a new third-party supplier of ganaxolone API in the 2023 periods, and no revenue related to the base period funding in 2024. As of December 31, 2023, the entire base period funding had been recorded, resulting in no revenue for the base period funding in the three and nine months ended September 30, 2024.

Collaboration Revenue

Collaboration revenue, which resulted from our agreement with Biologix, was less than $0.1 million for the three and nine months ended September 30, 2024 and September 30, 2023.

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Research and Development Expenses

We record direct Research and development expenses, consisting principally of external costs, such as fees paid to investigators, consultants, central laboratories and CROs in connection with our clinical trials, and costs related to manufacturing, to specific product development programs. We do not allocate costs related to purchasing clinical trial materials, employee and contractor-related costs, costs associated with our facility expenses, including depreciation or other indirect costs, to specific product programs because these costs are deployed across multiple product programs under research and development and, as such, are not separately classified. The table below shows our research and development expenses incurred with respect to each active program. The primary drivers of our Research and development expenditures are currently in our product development programs for CDD, RSE, and TSC. We did not allocate research and development expenses to any other specific product development programs during the periods presented (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2024		2023		2024		2023
CDKL5 deficiency disorder (1)	$	352	$	406	$	779	$	2,461
PCDH19-related epilepsy (2)		46		120		93		245
Tuberous Sclerosis (3)		3,105		3,491		9,748		10,865
Drug Development – Suspension (4)		1,879		1,267		4,646		2,425
Oral Indications Subtotal		5,382		5,284		15,266		15,996

Status epilepticus (5)		2,474		4,117		10,953		10,697
Drug Development – IV (6)		111		1,305		2,404		10,733
IV Indications Subtotal		2,585		5,422		13,357		21,430

Other research and development (7)		1,639		2,193		4,671		4,021
Indirect research and development (8)		6,728		10,762		28,055		31,559
Total	$	16,334	$	23,661	$	61,349	$	73,006

(1)

The decrease in the three months ended September 30, 2024 compared to the 2023 period was due to decreased phase 3 clinical trial activity in the three months ended September 30, 2024, partially offset by increased clinical trial activity in the three months ended September 30, 2024 related to a pediatric investigation plan (PIP) clinical trial. The decrease in the nine months ended September 30, 2024 compared to the 2023 period was due to decreased phase 3 clinical trial activity in the nine months ended September 30, 2024 as compared to the 2023 period, as well as increased activity associated with the MAA application and review in the nine months ended September 30, 2023 with no comparable costs in the 2024 period. These decreases were partially offset by increases in PIP clinical trial activity in the nine months ended September 30, 2024 with no comparable costs in the 2023 period.

(2)

Costs remained relatively consistent and were immaterial in each of the three and nine months ended September 30, 2024 compared to the 2023 periods.

(3)

The decrease in both the three and nine months ended September 30, 2024 compared to the 2023 periods were due primarily to increased global site activity in the 2023 periods which was partially offset by increased Phase 3 TSC trial activity in the 2024 periods.

(4)

The increases in the three and nine months ended September 30, 2024 compared to the 2023 periods were due primarily to higher manufacturing development activity related to clinical trial batches than in the prior 2023 periods.

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(5)

The decrease in the three months ended September 30, 2024 compared to the 2023 period was primarily due to decreased clinical trial activity in the three months ended September 30, 2024. The increase in the nine months ended September 30, 2024 compared to the 2023 period was primarily due to increased RAISE and RAISE II trial and close out activities in the 2024 period.

(6)

The decreases in the three and nine months ended September 30, 2024 compared to the 2023 periods were due primarily to the start-up costs associated with validation of a new third-party U.S. supplier of ganaxolone API in the 2023 periods.

(7)

The decrease in the three months ended September 30, 2024 compared to the 2023 period was due primarily to decreases in safety study activity. The increase in the nine months ended September 30, 2024 compared to the 2023 period was due primarily to an increase in post-marketing studies. Other research and development expenses include external expenses associated with preclinical development of ganaxolone, including safety studies, stability studies, preclinical studies, including animal toxicology and pharmacology studies and studies related to post-marketing commitments, and other professional fees.

(8)

The decreases in the three and nine months ended September 30, 2024 compared to the 2023 periods were primarily related to decreases in personnel costs, which were partially offset by increases in costs related to software. Indirect research and development expenses include personnel costs and non-study specific research and development costs.

Selling, General and Administrative Expenses

Selling, general and administrative expenses were $12.6 million and $47.9 million for the three and nine months ended September 30, 2024, respectively. Selling, general and administrative expenses were $14.9 million and $45.8 million for the three and nine months ended September 30, 2023, respectively. The primary drivers of the decrease for the three months ended September 30, 2024 compared to the 2023 period were $2.1 million in decreased personnel costs, $0.6 million in decreased consulting fees, $0.4 million in decreased professional fees and other general costs, and $0.2 million in decreased software related expenses, which were partially offset by $1.0 million in increased stock-based compensation costs. The primary drivers of the increase for the nine months ended September 30, 2024 compared to the 2023 period were $2.7 in increased stock-based compensation costs, $2.1 million in increased commercial costs, and $1.0 million in increased professional fees and other general costs, which were partially offset by $1.8 million in decreased personnel costs, $1.1 million in decreased consulting costs, and $0.8 million in software related expenses.

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Restructuring Costs

Restructuring costs were approximately $2.0 million for the nine months ended September 30, 2024, with no comparable costs in 2023, and primarily consisted of severance payments, employee benefits and related costs, as well as noncash stock compensation expense and contract termination costs. There were no restructuring costs in the three months ended September 30, 2024.

Cost of Product Revenue

Cost of product revenue was $0.7 million and $2.2 million for the three and nine months ended September 30, 2024, compared to $0.5 million and $1.0 million for the three and nine months ended September 30, 2023, respectively. The increases were due primarily to Cost of product revenue for the three and nine months ended September 30, 2024 beginning to reflect the current on-going average per unit cost of materials. For the three and nine months ended September 30, 2023, Cost of product revenues related to ZTALMY reflected a lower average per unit cost of materials, as prior to FDA approval of ZTALMY, costs estimated at approximately $2.0 million for commercially saleable product and materials were incurred and included in Research and development expenses. We expect ongoing Cost of product revenues related to ZTALMY to continue to reflect the on-going average per unit cost of materials throughout the remainder of 2024 and thereafter.

Interest Income

Interest income was $0.6 million and $3.2 million for the three and nine months ended September 30, 2024, respectively, compared to $1.9 million and $6.4 million for the three and nine months ended September 30, 2023, respectively, and consisted of interest earned on Cash and cash equivalents and Short-term investments. The decreases were due to a decrease in Cash and cash equivalent and Short-term investments in the three and nine months ended September 30, 2024 as compared to the three and nine months ended September 30, 2023.

Interest Expense

Interest expense was $3.8 million and $12.8 million for the three and nine months ended September 30, 2024, respectively, compared to $4.2 million and $12.6 million for the three and nine months ended September 30, 2023, respectively. Interest expense for the nine months ended September 30, 2024 included $6.3 million of interest paid and $1.5 million of debt amortization in connection with our Note Payable (Note 10 in accompanying notes to consolidated financial statements), and $4.5 million of non-cash interest expense and $0.4 million of debt amortization related to our Revenue interest financing payable (Note 11 in accompanying notes to consolidated financial statements). Interest expense for the nine months ended September 30, 2023 included $6.5 million of interest paid and $1.5 million of debt amortization in connection with our Note Payable, and $4.4 million of non-cash interest expense and $0.2 million of debt amortization related to our Revenue interest financing payable,

Other Income, net

Other income, net was $0.1 million for each of the three and nine months ended September 30, 2024 due primarily to a research and development tax credit. Other income, net was $1.0 million and $1.1 million for the three and nine months ended September 30, 2023, respectively, primarily due to the IRS Employee Retention Tax Credit program. Other income, net consists principally of other non-operational transactions, including research and development tax credits, gains or losses on disposal of fixed assets held for sale, foreign currency transactions, and fair value adjustments.

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Liquidity and Capital Resources

Since inception, we have incurred negative cash flows from our operations, and other than for the three months ended September 30, 2022 due to a one-time net gain from the sale of our PRV, we have incurred net losses. We incurred a Net loss of $98.7 million for the nine months ended September 30, 2024. Our Cash used in operating activities was $87.8 million for the nine months ended September 30, 2024 compared to $91.0 million for the nine months ended September 30, 2023. Historically, we have financed our operations principally through the sale of common stock, notes payable, preferred stock and convertible debt.

In August 2022, we received a letter from Purdue in which Purdue claimed that it was owed $5.5 million by us from the sale of the PRV pursuant to the Purdue License Agreement. We responded to Purdue that we did not agree with their claim. In February 2024, following discussions with Purdue, we agreed to pay Purdue $4.0 million in respect of its claim. We paid the first installment of $2.0 million in March 2024 and the second installment of $2.0 million in June 2024.

In September 2023, in connection with the amended Equity Distribution Agreement (EDA) with JMP Securities LLC (JMP), we received net proceeds totaling approximately $25.9 million from the sale of 3.7 million shares of our common stock at an average price of $7.17 per share.

As of September 30, 2024, we had Cash and cash equivalents $42.2 million. We did not have any Short-term investments as of September 30, 2024. We believe that our existing Cash and cash equivalents as of September 30, 2024 will be sufficient to fund our operating expenses and capital expenditure requirements into the second quarter of 2025. This expectation includes cost reduction activities that were implemented in the second and fourth quarters of 2024.

Oaktree Credit Agreement

On May 11, 2021 (Closing Date) and as amended on May 17, 2021, May 23, 2022, October 28, 2022 and June 6, 2024 (Credit Agreement), we entered into the Credit Agreement with Oaktree Fund Administration, LLC as administrative agent (Oaktree) and the lenders party thereto (collectively, Lenders) that provided for a five-year senior secured term loan facility in an aggregate original principal amount of up to $125.0 million that was available to us in five tranches (collectively, Term Loans). As of September 30, 2024, we had drawn on three tranches with no additional funds available thereunder.

We received $15.0 million of Tranche A-1 Term Loans on the Closing Date, $30.0 million of Tranche A-2 Term Loans in September 2021 after formal acceptance by the FDA of an NDA filing relating to the use of ganaxolone in the treatment of CDD, and $30.0 million of Tranche B Term Loans in March 2022 after FDA approval of ZTALMY for CDD. In connection with the second amendment to the Credit Agreement, we prepaid $15.0 million of the Tranche B Term Loans in June 2024 as well as the associated prepayment penalties, exit fee and accrued interest. Additionally, during the nine months ended September 30, 2024, we began paying the required quarterly principal payments. As of September 30, 2024, the loans under the Credit Agreement consisted of $58.1 million of previously drawn Term Loans with no additional funds available thereunder.

The Term Loans mature on May 11, 2026 (Maturity Date). The Term Loans bear interest at a fixed per annum rate (subject to increase during an event of default) of 11.50%, and we are required to make quarterly interest payments until the Maturity Date. We began making quarterly principal payments beginning on June 30, 2024 in an amount equal to 2.5% of the aggregate amount of the previously drawn Term Loans, and continuing until 2025, at which time we are required to make quarterly principal payments in an amount equal to 5.0% of the aggregate amount of the previously drawn Term Loans until the Maturity Date. On the Maturity Date, we are required to pay in full all outstanding Term Loans and other amounts owed under the Credit Agreement.

At the time of borrowing any tranche of the Term Loans, we were required to pay an upfront fee of 2.0% of the aggregate principal amount borrowed at that time.

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In connection with the Revenue Interest Financing Agreement with Sagard as described below, on October 28, 2022, we entered into an amendment to the Credit Agreement to, among other things, allow for the consummation of the Revenue Interest Financing Agreement and the transactions thereunder, and paid $0.3 million in administrative fees in connection with the execution of the amendment. In addition, the amendment increased the exit fee due by us upon any repayment, whether as a prepayment or a scheduled repayment, of the principal of the loans under the Credit Agreement from 2.00% to 2.67%.

Sagard Financing Agreement

In October 2022, we entered into a revenue interest financing agreement (the Revenue Interest Financing Agreement) with Sagard Healthcare Royalty Partners, LP (Sagard) pursuant to which we received $32.5 million.

In exchange for the Investment Amount, we agreed to make quarterly payments to Sagard (Payments) as follows: (i) for each calendar quarter from and after the closing date of such financing through and including the quarter ended June 30, 2026, an amount equal to 7.5% of (a) our U.S. net sales of ZTALMY and all other pharmaceutical products that contain ganaxolone (Net Sales), in each case with any dosage form, dosing regimen, or strength, or any improvements related thereto (collectively, Included Products) and (b) certain other payments received by us in connection with the manufacture, development and sale of the Included Products in the U.S. (Other Included Payments, and, together with Net Sales, Product Revenue); and (ii) for each calendar quarter following the calendar quarter ended June 30, 2026, an amount equal to (x) 15.0% of the first $100 million in annual Product Revenue of the Included Products and (y) 7.5% of annual Product Revenue of the Included Products in excess of $100 million.

The Payments are subject to a hard cap equal to 190% ($61.8 million) of the Investment Amount (Hard Cap). Sagard’s right to receive payments will terminate when Sagard has received payments in respect of the Included Products, including any additional payments described below, equal to the Hard Cap. Further, we have the right to make voluntary prepayments to Sagard, and such payments will be credited against the Hard Cap.

If Sagard has not received aggregate payments equaling at least 100% of the Investment Amount by December 31, 2027 or at least 190% of the Investment Amount by December 31, 2032 (each, Minimum Amount), then we will be obligated to make a cash payment to Sagard in an amount sufficient to gross up Sagard up to the applicable Minimum Amount within a specified period of time after each reference date.

BARDA Contract

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The BARDA Contract consists of an approximately four-year base period, including the extension periods, during which BARDA agreed to provide up to approximately $21 million of funding for the RAISE trial on a cost share basis and funding of additional preclinical studies of ganaxolone in nerve agent exposure models. As of December 31, 2023, the entire base period funding of approximately $21 million had been recorded. Following successful completion of the RAISE trial and preclinical studies in the base period and extension periods, the BARDA Contract provides for approximately $31 million of additional BARDA funding for three options in support of ganaxolone manufacturing, supply chain, clinical, regulatory and toxicology activities, including the $12.3 million exercise of Option 2 as described above. Under the BARDA Contract, we will be responsible for cost sharing in the amount of approximately $33 million and BARDA will be responsible for approximately $52 million if all development options are completed. The contract period-of-performance (base period plus option exercises) is up to approximately five years.

Equity Financings

In connection with the closing of an equity financing in November 2022 and the December 2022 exercise of the related underwriters’ option, we issued a total of 12,421,053 shares of common stock and 2,105,264 pre-funded warrants to purchase common stock in an underwritten public offering resulting in aggregate net proceeds of $64.5 million, after deducting the underwriting discounts and commissions and offering expenses paid or payable by us.

Equity Distribution Agreement

On July 9, 2020, we entered into an Equity Distribution Agreement (EDA) with JMP Securities LLC (JMP), as amended by the March 31, 2023 Amendment No. 1 to the EDA (Amended EDA), to create an at the market equity program under which we from time to time may offer and sell shares of our common stock without a specified maximum aggregate offering price. The Amended EDA was entered into in connection with our filing of a Registration Statement on Form S-3 (File No. 333-271041) with the SEC (the 2023 Registration Statement), which includes a prospectus supplement covering the offering, issuance and sale by us of up to $75,000,000 of shares of common stock that may be issued and sold under the Amended EDA. Subject to the terms and conditions of the Amended EDA, JMP will be entitled to a commission of up to 3.0% of the gross proceeds from each sale of shares of our common stock. We did not sell any shares of our common stock during each of the three and nine months ended September 30, 2024 and September 30, 2023 under the EDA. As of September 30, 2024, we had up to $48.6 million of shares of common stock that may be issued and sold under the Amended EDA.

Cash Flows

Operating Activities. Cash used in operating activities was $87.8 million and $91.0 million for the nine months ended September 30, 2024 and 2023, respectively. Excluding the noncash impacts primarily related to depreciation and amortization, debt issuance costs, interest accretion net of cash paid, stock-based compensation, and changes in the net contract assets/liabilities related to the Orion, Tenacia and Biologix Collaboration Agreements, the change in cash used in operating activities for the nine months ended September 30, 2024 compared to the same period in 2023, was primarily the result of decreases in the changes in accounts payable, accrued expenses, including the $4.0 million installment to be paid to Purdue, other long term-liabilities, prepaid expenses, other current assets, inventory and accounts receivable and a decrease in operating expenses for the nine months ended September 30, 2024 as compared to the 2023 period, which was due primarily to a decrease in personnel costs related to our reduction-in-force (RIF) in the second quarter of 2024 which impacted approximately 20% of our workforce.

Investing Activities. Cash provided by investing activities of $28.7 million for the nine months ended September 30, 2024 represents $29.9 million in maturities of Short-term investments, which was partially offset by $1.2 million in purchases of manufacturing equipment. Cash used in investing activities of $35.1 million for the nine months ended September 30, 2023 primarily represents $52.0 million in purchases of Short-term investments, which was partially offset by $17.0 million in maturities of Short-term investments.

Financing Activities. Cash used in financing activities of $19.4 million for the nine months ended September 30, 2024 represents $19.6 million in principal prepayments, including associated financing costs and exit fees, on our Long-term debt and $0.3 million in proceeds from the exercise of stock options. Cash provided by financing activities of

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$26.0 million for the nine months ended September 30, 2023 represents $25.9 million in net proceeds related to the sale of common stock in connection with the Amended EDA, and $0.8 million in proceeds from the exercise of stock options, which were partially offset by $0.7 million of other financing activities.

Funding Requirements

Since inception, we have incurred negative cash flows from our operations, and other than for the three months ended September 30, 2022 due to a one-time net gain from the sale of our PRV, we have incurred net losses. We incurred Net losses of $24.2 million and $98.7 million for the three and nine months ended September 30, 2024, respectively. We have generated limited product revenues, and there is no assurance that profitable operations will be achieved in the future, and if achieved, could be sustained on a continuing basis.

We had Cash and cash equivalents of $42.2 million as of September 30, 2024. We believe that our existing Cash and cash equivalents as of September 30, 2024 will be sufficient to fund our operating expenses and capital expenditure requirements into the second quarter of 2025. This expectation includes cost reduction activities that were implemented in the second and fourth quarters of 2024. As a result of the TrustTSC outcome, we discontinued further ganaxolone clinical development, other than activities required by the FDA and EMA specific to post-approval commitments of Ztalmy for CDD, and have taken additional steps to reduce costs, including an approximate 45% reduction in our workforce in the fourth quarter of 2024. We also commenced a process to explore strategic alternatives with the goal of maximizing value for our stockholders and engaged Barclays as an advisor to assist in our review of strategic alternatives. There can be no assurance that the exploration of strategic alternatives will result in any agreements or transactions, or as to the timing of any such agreements or transactions.

Our future capital requirements will depend on many factors, including:

●

the results of our preclinical studies and clinical trials;

●

the development, formulation and commercialization activities related to ganaxolone, including ZTALMY;

●

the timing of, and the costs involved in, obtaining regulatory approvals for ganaxolone, including ZTALMY in indications other than CDD in the U.S., EU, or other significant markets, and any other future product candidates in these markets;

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the cost of commercialization activities for ZTALMY in CDD in the U.S., including marketing, sales and distribution costs;

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the cost of commercialization activities for ZTALMY, ganaxolone in any other indications, or any other future product candidates, are approved for sale, including marketing, sales and distribution costs;

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the cost of manufacturing and formulating ganaxolone, or any other future product candidates, to internal and regulatory standards for use in preclinical studies, clinical trials and, if approved, commercial sale;

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our ability to establish and maintain strategic collaborations, licensing or other arrangements and the financial terms of such agreements;

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our ability to receive funding under the BARDA Contract;

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our expectations regarding the amount and timing of milestone and royalty payments owed to us pursuant to our collaboration and supply agreements with Orion for the commercialization of ganaxolone in Europe, our collaboration and supply agreements with Tenacia for the commercialization of ganaxolone in Mainland China, Hong Kong, Macau and Taiwan and our exclusive distribution and supply agreement with Biologix for the distribution and supply of ganaxolone in the Middle East and North Africa region;

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●

our expectations regarding the amount and timing of milestone and royalty payments owed by us pursuant to our Revenue Interest Financing Agreement with Sagard;

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any product liability, infringement or other lawsuits related to ZTALMY or other indications being developed for ganaxolone and, if approved, products;

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capital needed to attract and retain skilled personnel;

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the timing and results of our strategic alternatives review;

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the costs involved in preparing, filing, prosecuting, maintaining, defending and enforcing patent claims, including litigation costs and the outcome of such litigation; and

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the timing, receipt and amount of sales of, or royalties on, ZTALMY in CDD and on future approved products, if any.

Please see the Risk Factors section included in our Annual Report on Form 10-K for the year ended December 31, 2023 filed with the SEC on March 5, 2024 for additional risks associated with our substantial capital requirements.

Off-Balance Sheet Arrangements

We do not have any off-balance sheet arrangements that have or are reasonably likely to have a current or future effect on our financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources that are material to investors.

Discussion of Critical Accounting Policies and Significant Judgments and Estimates

The preparation of financial statements in conformity with GAAP requires us to use judgment in making certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities and the reported amounts of revenues and expenses in our financial statements and accompanying notes. Critical accounting policies are those that are most important to the portrayal of our financial condition and results of operations and require difficult, subjective and complex judgments by management in order to make estimates about the effect of matters that are inherently uncertain. During the three months ended September 30, 2024, there were no significant changes to our critical accounting policies from those described in our annual consolidated financial statements for the year ended December 31, 2023, which we included in our Annual Report on Form 10-K filed with the SEC on March 5, 2024.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

We are a smaller reporting company as defined by Rule 12b-2 of the Securities Exchange Act of 1934, as amended (Exchange Act), and are not required to provide the information under this item.

Item 4. Controls and Procedures

(a) Evaluation of Disclosure Controls and Procedures.

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this Quarterly Report on Form 10-Q to ensure that the information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms, and that information required to be disclosed in the reports we file or submit under the Exchange Act is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, to allow timely

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decisions regarding required disclosures. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost benefit relationship of possible controls and procedures. Based on such evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of September 30, 2024.

(b) Changes in Internal Control Over Financial Reporting

There was no change in our internal control over financial reporting identified in connection with the evaluation required by Rule 13a-15(d) and 15d-15(d) of the Exchange Act that occurred during the quarter ended September 30, 2024 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II

OTHER INFORMATION

Item 1. Legal Proceedings

From time to time, we may become subject to litigation and claims arising in the ordinary course of business. Other than as described below, we are not currently a party to any material legal proceedings, and we are not aware of any pending or threatened legal proceedings against us that we believe could have a material adverse effect on our business, operating results or financial condition.

On June 5, 2024, a securities class action lawsuit captioned Bishins v. Marinus Pharmaceuticals, Inc., et. al., Case 2:24-cv-02430, was filed against us and certain of our officers in the U.S. District Court for the Eastern District of Pennsylvania. The complaint alleges violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended (Exchange Act), and Rule 10b-5 promulgated thereunder on the basis of purportedly materially false and misleading statements and omissions concerning our RAISE and RAISE II clinical trials. The complaint seeks, among other things, unspecified damages, attorneys’ fees, expert fees, and other costs. The court appointed a lead plaintiff and lead counsel for the action on August 16, 2024. The lead plaintiff filed an amended complaint on October 4, 2024. We intend to move to dismiss the amended complaint on or before November 22, 2024. We intend to vigorously defend against this action.

Item 1A. Risk Factors

Other than as set forth below and previously disclosed in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2024, there have been no material changes to the risk factors previously disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023:

Risks Related to our Compliance with Nasdaq Listing Requirements

If our stock price continues to remain below $1.00 or our market value of listed securities remains below $50 million, or we fail to meet other listing requirements of the Nasdaq Stock Market, our common stock may be subject to delisting from the Nasdaq Stock Market, which would materially reduce the liquidity of our common stock and have an adverse effect on our market price.

Our common stock is listed on the Nasdaq Global Market, and we are therefore subject to its continued listing requirements, including requirements with respect to the market value of publicly-held shares, market value of listed shares, minimum bid price per share, and minimum stockholders’ equity, among others, and requirements relating to board and committee independence. If we fail to satisfy one or more of the requirements, we may be delisted from the Nasdaq Global Market.

Nasdaq Listing Rule 5450(a)(1) requires companies listed on the Nasdaq Global Market to maintain a minimum bid price of at least $1.00 per share. If the minimum bid price of our common stock remains below $1.00 per share for 30 consecutive business days, Nasdaq will send us a notice that we are not in compliance with Nasdaq Listing Rule 5450(a)(1). In accordance with Nasdaq Listing Rule 5810(c)(3)(A), we would then have a period of 180 calendar days to regain compliance with the minimum bid price requirement. To regain compliance, the closing bid price of our common stock would have to meet or exceed $1.00 per share for at least ten consecutive business days during this 180 calendar day period. In the event we did not regain compliance by the end of such period, we could be eligible for an additional 180 calendar day grace period, provided that we submit an online transfer application to transfer the listing of our common stock to the Nasdaq Capital Market, submit an application fee, and meet the continued listing requirement for market value of publicly held shares and all other initial listing standards for the Nasdaq Capital Market, except the bid price requirement. In addition, we will be required to provide written notice of our intention to cure the deficiency during the second compliance period by effecting a reverse stock split if necessary. If it appears to Nasdaq that we would not be able to cure the deficiency during the second compliance period, or if we determined not to submit a transfer application or make the required representation, Nasdaq would provide written notice to us that our common stock would be subject

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to delisting. In the event of such notification, we could appeal Nasdaq’s determination to delist our securities, but there can be no assurance that Nasdaq would grant our request for continued listing.

Additionally, Nasdaq Listing Rule 5450(b)(2) requires companies listed on the Nasdaq Global Market to maintain a total market value of listed securities of at least $50 million. If the total market value of our listed securities remains below $50 million for 30 consecutive business days, Nasdaq will send us a notice that we are not in compliance with Nasdaq Listing Rule 5450(b)(2). In accordance with Nasdaq Listing Rule 5810(c)(3)(C), we would then have a period of 180 calendar days to regain compliance with the total market value of listed securities requirement. To regain compliance, the total market value of our listed securities would have to meet or exceed $50 million for at least ten consecutive business days during this 180 calendar day period. In the event we did not regain compliance by the end of such period, Nasdaq would provide written notice to us that our common stock would be subject to delisting. In the event of such notification, we could appeal Nasdaq’s determination to delist our securities, but there can be no assurance that Nasdaq would grant our request for continued listing.

We are actively monitoring our stock price and our market value of listed securities, and will consider any and all options available to us to maintain or, if necessary, regain compliance. There can be no assurance, however, that we will be able to maintain or, if necessary, regain compliance and meet Nasdaq’s continued listing requirements. To the extent that we are unable to maintain or, if necessary, regain compliance with Nasdaq Listing Rule 5450(a)(1) and Rule 5450(b)(2) or the other requirements of Nasdaq for continued listing, there is a risk that our common stock may be delisted from Nasdaq. Delisting from Nasdaq may limit the range and attractiveness of strategic alternatives that we are able to consider, adversely affect our ability to raise additional financing through the public or private sale of equity securities, significantly affect the ability of investors to trade our securities, or negatively affect the value and liquidity of our common stock. Delisting also could have other negative results, including the potential loss of employee confidence, the loss of institutional investors or interest in business development opportunities.

If we are delisted from Nasdaq and we are not able to list our common stock on another exchange, our common stock may be eligible to trade on an over-the-counter system, such as the OTCQB market, where an investor may find it more difficult to sell our common stock or obtain accurate quotations as to the market value of our common stock. We cannot assure you that our common stock, if delisted from Nasdaq, will be listed on another national securities exchange or quoted on an over-the-counter quotation system.

Risks Related to our Strategic Alternative Review

We are in the process of evaluating strategic alternatives following the failure of TrustTSC to meet its primary endpoint, and we may need to pursue bankruptcy or dissolution if we are not able to identify and implement a meaningful strategic alternative in a timely manner.

On October 24, 2024, we announced that TrustTSC did not meet the primary endpoint of percent change in 28-day TSC-associated seizure frequency. As a result of this, we discontinued further ganaxolone clinical development, other than activities required by the FDA and EMA specific to post-approval commitments of ZTALMY for CDD. Our existing cash and cash equivalents will not be sufficient to continue our operations as planned and, as a result, we have commenced a process to explore strategic alternatives with the goal of maximizing value for our stockholders, which may include the sale of the company, a strategic partnership with one or more parties, or the licensing, sale or divestiture of some or more of our assets, in addition to other alternatives. We have engaged Barclays to assist in reviewing our strategic alternatives. However, any strategic alternative that may be pursued and completed ultimately may not deliver the anticipated benefits or enhance shareholder value. There can be no guarantee that the process of evaluating strategic alternatives will result in our company entering into or completing a potential transaction, and we have not set a timetable for the completion of this review process.

Should we be unable to identify and implement a meaningful strategic alternative in a timely manner, our Board of Directors is likely to consider seeking bankruptcy protection under the U.S. Bankruptcy Code or engaging in a similar process. In that event we are required to liquidate under the federal bankruptcy laws, it is highly unlikely that our stockholders would receive any value for their shares.

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Our restructuring plans and the associated headcount reductions may not result in anticipated savings, could result in total costs and expenses that are greater than expected and could disrupt our business.

On April 30, 2024, we implemented a reduction-in-force (RIF) that impacted approximately 20% of our workforce, and implemented additional cost reduction activities with impact beginning in the second quarter of 2024. On November 4, 2024, we implemented a separate RIF that impacted approximately 45% of our workforce, and implemented additional cost reduction activities with impact beginning in the fourth quarter of 2024, to reduce operating expenses and better align our workforce with the needs of our business following our discontinuance of further ganaxolone clinical development, other than activities required by the FDA and EMA specific to post-approval commitments of ZTALMY for CDD. Execution of the RIF is expected to be substantially completed by the end of 2024.

As of the filing of this Quarterly Report on Form 10-Q, in connection with the November 4, 2024 RIF, we estimate that we will incur in the fourth quarter of 2024 severance and other employee-related costs of approximately $1.5 million. We are also in the process of assessing any impact associated with the termination of certain contracts and all other activities under the November 4, 2024 RIF.

We may undertake further restructuring actions or workforce reductions in the future. These types of restructuring and cost reduction activities are complex and may result in unintended consequences and costs, such as the loss of institutional knowledge and expertise, attrition beyond the intended number of employees, decreased morale among our remaining employees, and potential impacts on financial reporting. In addition, while positions have been eliminated, certain functions necessary to our operations remain, and we may be unsuccessful in retaining employees to perform such functions or in distributing the duties and obligations of departed employees among our remaining employees. These types of activities or losses could also make it difficult for us to pursue, or prevent us from pursuing, new opportunities and initiatives due to insufficient personnel, including any potential strategic alternatives. We may not realize, in full or in part, the anticipated benefits, savings and improvements in our cost structure from our restructuring efforts due to unforeseen difficulties, delays or unexpected costs. For example, we may incur unanticipated charges not currently contemplated as a result of the RIFs. If we are unable to realize the expected operational cost savings from the restructurings, our operating results and financial condition would be adversely affected.

We may become involved in additional securities litigation that could further divert management’s attention and harm our business, and insurance coverage may not be sufficient to cover all costs and damages.

In addition to the existing securities class action lawsuit filed against us on June 5, 2024 captioned Bishins v. Marinus Pharmaceuticals, Inc., et. al., Case 2:24-cv-02430, we could become involved in additional securities litigation. In the past, securities litigation has often followed certain significant business transactions, such as the sale of a company or announcement of any other strategic transaction, or the announcement of negative events, such as negative results from clinical trials. We may be exposed to such litigation even if no wrongdoing occurred. Litigation is usually expensive and diverts management’s attention and resources, which could adversely affect our business and cash resources and our ability to consummate a potential strategic transaction or the ultimate value our stockholders receive in any such transaction.

We and certain of our officers have been named as defendants in a pending securities class action lawsuit. This lawsuit, and potential similar or related lawsuits, could result in substantial damages, divert management’s time and attention from our business, and have a material adverse effect on our results of operations. This lawsuit, and any other lawsuits to which we are subject, will be costly to defend and is uncertain in its outcome.

On June 5, 2024, a securities class action lawsuit captioned Bishins v. Marinus Pharmaceuticals, Inc., et. al., Case 2:24-cv-02430 was filed against us and certain of our officers in the U.S. District Court for the Eastern District of Pennsylvania. The complaint alleges violations of Sections 10(b) and 20(a) of the Securities and Exchange Act of 1934, as amended (Exchange Act) and Rule 10b-5 promulgated thereunder on the basis of purportedly materially false and misleading statements and omissions concerning our RAISE and RAISE II clinical trials. The complaint seeks, among other things, unspecified damages, attorneys’ fees, expert fees, and other costs. The court appointed a lead plaintiff and

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lead counsel for the action on August 16, 2024. The lead plaintiff filed an amended complaint on October 4, 2024. We intend to move to dismiss the amended complaint on or before November 22, 2024.

We intend to vigorously defend against this action. However, whether or not the claim is successful, litigation is often expensive and can divert management’s attention and resources from other business concerns, which could adversely affect our business.

We currently are not able to estimate the possible cost to us from this action, as the pending lawsuit is currently at an early stage, and we cannot be certain how long it may take to resolve the pending lawsuit or the possible amount of any damages that we may be required to pay. If we are ultimately required to pay significant defense costs, damages or settlement amounts, such payments could adversely affect our operations.

We may be the target of similar litigation in the future. The market price of our common stock has experienced and may continue to experience volatility, and in the past, companies that have experienced volatility in the market price of their stock have been subject to securities litigation. Any future litigation could result in substantial costs and divert our management’s attention from other business concerns, which could seriously harm our business. We maintain liability insurance; however, if any costs or expenses associated with the pending lawsuit or any other litigation exceed our insurance coverage, we may be forced to bear some or all costs and expenses directly, which could adversely affect our business, financial condition, results of operations or stock price.

An unfavorable outcome with the pending lawsuit or any other litigation could have a material adverse effect on our business, reputation, financial condition, results of operations and cash flows, which, in turn, may result in or may contribute to an inability by us to meet the financial covenant contained in the RIFA.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

None.

Item 3. Defaults upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

Trading Plans

During the three months ended September 30, 2024, none of our directors or officers (as defined in Rule 16a-1(f) of the Exchange Act) adopted a “Rule 10b5-1 trading arrangement” (as those terms are defined under Item 408 of Regulation S-K).

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Item 6. Exhibits

Exhibit Number		Exhibit Description

3.1		Fourth Amended and Restated Certificate of Incorporation. (Incorporated by reference to Exhibit 3.1 to Form 8-K current report filed on August 7, 2014.)
3.2		Certificate of Amendment of the Fourth Amended and Restated Certificate of Incorporation. (Incorporated by reference to Exhibit 3.1 to Form 8-K current report filed on April 2, 2020.)
3.3		Certificate of Amendment of the Fourth Amended and Restated Certificate of Incorporation. (Incorporated by reference to Exhibit 3.1 to Form 8-K current report filed on May 27, 2020.)
3.4		Certificate of Amendment of the Fourth Amended and Restated Certificate of Incorporation. (Incorporated by reference to Exhibit 3.1 to Form 8-K current report filed on September 22, 2020.)
3.5		Certificate of Amendment of the Fourth Amended and Restated Certificate of Incorporation. (Incorporated by reference to Exhibit 3.2 to Form 8-K current report filed on September 22, 2020.)
3.6		Amended and Restated By-laws. (Incorporated by reference to Exhibit 3.2 to Form 8-K current report filed on August 7, 2014.)
3.7		Certificate of Designations, Preferences and Rights of Series A Participating Convertible Preferred Stock. (Incorporated by reference to Exhibit 3.1 to Form 8-K current report filed on December 13, 2019.)
3.8		Delaware Certificate of Change of Registered Agent. (Incorporated by reference to Exhibit 3.8 to Form 10-Q quarterly report filed on May 12, 2022.)
4.1		Specimen Certificate evidencing shares of Marinus Pharmaceuticals, Inc.’s common stock. (Incorporated by reference to Exhibit 4.1 to Form S-1/A registration statement filed on July 18, 2014.)
4.2		Form of Pre-funded Warrant to Purchase Common Stock. (Incorporated by reference to Exhibit 4.1 to Form 8-K current report filed on November 10, 2022.)
31.1		Certification of Chief Executive Officer pursuant to Rule 13a-14(a) or 15d-14(a) under the Exchange Act (filed herewith.)
31.2		Certification of Chief Financial Officer pursuant to Rule 13a-14(a) or 15d-14(a) under the Exchange Act (filed herewith.)
32.1		Certification Pursuant to 18 U.S.C. Section 1350 of principal executive officer and principal financial officer (furnished herewith.)
101.INS		XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH		XBRL Taxonomy Extension Schema
101.CAL		XBRL Taxonomy Extension Calculation Linkbase
101.DEF		XBRL Taxonomy Extension Definition Linkbase
101.LAB		XBRL Taxonomy Extension Labels Linkbase
101.PRE		XBRL Taxonomy Extension Presentation Linkbase
104		Cover Page Interactive Data File formatted as Inline XBRL and contained in Exhibit 101

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Signature	Title	Date

/s/ SCOTT BRAUNSTEIN, M.D.	President, Chief Executive Officer (Principal Executive Officer), Chairman of the Board and Director	November 12, 2024
Scott Braunstein, M.D.		November 12, 2024

/s/ STEVEN PFANSTIEL	Chief Operating Officer, Chief Financial Officer and Treasurer (Principal Financial and Accounting Officer)	November 12, 2024
Steven Pfanstiel		November 12, 2024

Exhibit 31.1

Certification of Chief Executive Officer Pursuant to

Exchange Act Rules 13a-14(a) or 15d-14(a)

I, Scott Braunstein, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Marinus Pharmaceuticals, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.


Date: November 12, 2024	/s/ Scott Braunstein, M.D.
	Scott Braunstein, M.D.
	Chief Executive Officer and Director (Principal Executive Officer)

Exhibit 31.2

Certification of Chief Financial Officer Pursuant to

Exchange Act Rules 13a-14(a) or 15d-14(a)

I, Steven Pfanstiel, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Marinus Pharmaceuticals, Inc.;

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

4
Date: November 12, 2024	/s/ Steven Pfanstiel
	Steven Pfanstiel,
	Chief Operating Officer, Chief Financial Officer and Treasurer (Principal Financial and Accounting Officer)

Exhibit 32.1

Certification Pursuant to 18 U.S.C. Section 1350

In connection with the quarterly report of Marinus Pharmaceuticals, Inc. (the “Company”) on Form 10-Q for the quarter ended September 30, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned, in the capacities and on the date indicated below, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to his knowledge:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

4
Date: November 12, 2024	/s/ Scott Braunstein
	Chief Executive Officer and Director
	(Principal executive officer)

Date: November 12, 2024	/s/ Steven Pfanstiel
	Chief Operating Officer, Chief Financial Officer and Treasurer
	(Principal financial and accounting officer)

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2024	Nov. 05, 2024
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Securities Act File Number	001-36576
Entity Registrant Name	MARINUS PHARMACEUTICALS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-0198082
Entity Address, Address Line One	5 Radnor Corporate Center, Suite 500
Entity Address, Address Line Two	100 Matsonford Rd
Entity Address, City or Town	Radnor
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19087
City Area Code	484
Local Phone Number	801-4670
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	MRNS
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		55,185,622
Entity Central Index Key	0001267813
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Amendment Flag	false

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 42,184	$ 120,572
Short-term investments		29,716
Accounts receivable, net	3,840	3,799
Inventory	6,717	2,413
Prepaid expenses and other current assets	4,660	8,746
Total current assets	57,401	165,246
Property and equipment, net	4,882	3,843
Other assets	1,341	1,819
Total assets	63,624	170,908
Current liabilities:
Accounts payable	3,707	4,003
Current portion of notes payable	13,475	11,551
Current portion of revenue interest financing payable	3,163	2,211
Accrued expenses	14,159	22,859
Total current liabilities	34,504	40,624
Notes payable, net of deferred financing costs	41,713	61,423
Revenue interest financing payable, net of deferred financing costs	36,039	33,766
Contract liabilities, net	18,108	17,545
Other long-term liabilities		785
Total liabilities	130,364	154,143
Stockholders' (deficit) equity:
Common stock, $0.001 par value; 150,000,000 shares authorized, 55,192,929 issued and 55,185,622 outstanding at September 30, 2024 and 54,585,428 issued and 54,578,121 outstanding at December 31, 2023	55	55
Additional paid-in capital	603,853	588,656
Treasury stock at cost, 7,307 shares at September 30, 2024 and December 31, 2023
Accumulated other comprehensive loss		(20)
Accumulated deficit	(670,648)	(571,926)
Total stockholders' (deficit) equity	(66,740)	16,765
Total liabilities and stockholders' (deficit) equity	$ 63,624	$ 170,908

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2024	Dec. 31, 2023
CONSOLIDATED BALANCE SHEETS
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	55,192,929	54,585,428
Common stock, shares outstanding	55,185,622	54,578,121
Treasury stock, shares	7,307	7,307

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue:
Federal contract revenue	$ 56	$ 1,891	$ 295	$ 10,753
Total revenue	8,541	7,338	24,276	23,799
Expenses:
Research and development	16,334	23,661	61,349	73,006
Selling, general and administrative	12,573	14,868	47,909	45,794
Restructuring Costs			1,950
Total expenses	29,621	38,984	113,413	119,847
Loss from operations	(21,080)	(31,646)	(89,137)	(96,048)
Interest income	598	1,895	3,169	6,366
Interest expense	(3,843)	(4,242)	(12,806)	(12,597)
Other income, net	100	1,021	52	1,105
Loss before income taxes	(24,225)	(32,972)	(98,722)	(101,174)
Benefit for income taxes				1,538
Net loss applicable to common shareholders	$ (24,225)	$ (32,972)	$ (98,722)	$ (99,636)
Per share information:
Net loss per share of common stock-basic (in dollar per share)	$ (0.42)	$ (0.61)	$ (1.73)	$ (1.89)
Net loss per share of common stock-diluted (in dollar per share)	$ (0.42)	$ (0.61)	$ (1.73)	$ (1.89)
Basic weighted average shares outstanding (in shares)	57,229,229	53,920,109	57,049,038	52,755,114
Diluted weighted average shares outstanding (in shares)	57,229,229	53,920,109	57,049,038	52,755,114
Other comprehensive income:
Unrealized gain (loss) on available-for-sale securities		$ 43	$ 20	$ (71)
Total comprehensive loss	$ (24,225)	(32,929)	(98,702)	(99,707)
Product revenue, net
Revenue:
Revenue	8,468	5,429	23,928	13,010
Expenses:
Cost of product revenue	714	455	2,205	1,047
Collaboration revenue
Revenue:
Revenue	$ 17	$ 18	$ 53	$ 36

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Cash flows from operating activities
Net loss		$ (98,722)	$ (99,636)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		405	426
Amortization of debt issuance costs		2,278	1,659
Accretion of revenue interest financing debt, net of cash paid		2,784	4,421
Amortization of discount on short-term investments		(149)	(995)
Stock-based compensation expense		14,940	11,638
Amortization of net contract asset/liability		(1,018)	(1,259)
Noncash lease expense		112	146
Noncash lease liability		567	300
Write off of fixed assets			61
Write off of right-of-use assets	$ 0	757		$ 0
Changes in operating assets and liabilities:
Net contract asset/liability		1,581	2,079
Prepaid expenses and other current assets, non-current assets, inventory and accounts receivable		(1,174)	(6,290)
Accounts payable and accrued expenses		(10,116)	(3,559)
Net cash used in operating activities		(87,755)	(91,009)
Cash flows from investing activities
Proceeds from sale of property and equipment			9
Maturities of short-term investments		29,885	17,000
Purchases of short-term investments			(51,995)
Purchases of property and equipment		(1,152)	(85)
Net cash provided by (used in) investing activities		28,733	(35,071)
Cash flows from financing activities
Proceeds from exercise of stock options		257	783
Prepayments of long-term debt, including financing costs		(19,623)
Other cash flows from financing activities			(737)
Proceeds from equity offerings, net of offering costs			25,920
Net cash (used in) provided by financing activities		(19,366)	25,966
Net decrease in cash and cash equivalents		(78,388)	(100,114)
Cash and cash equivalents-beginning of period		120,572	240,551	240,551
Cash and cash equivalents-end of period	$ 42,184	42,184	140,437	$ 120,572
Supplemental disclosure of cash flow information
Unrealized gain (loss) on short-term investments		20	(71)
Financing costs			97
Property and equipment in accounts payable		221
Cash paid for interest during the period		$ 7,944	6,540
Cash paid for income taxes during the period			$ 903

CONSOLIDATED STATEMENTS OF (DEFICIT) EQUITY - USD ($) $ in Thousands	Series A Convertible Preferred Stock Preferred Stock	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total
Balance Beginning at Dec. 31, 2022	$ 4,043	$ 50	$ 542,428			$ (430,521)	$ 116,000
Balance Beginning (in shares) at Dec. 31, 2022	4,300	49,642,767		7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Stock-based compensation expense			3,741				3,741
Net issuance of common stock in connection with the vesting of restricted stock (in shares)		22,350
Unrealized gain (loss) on short-term investments					$ 74		74
Net income (loss)						(34,730)	(34,730)
Balance Ending at Mar. 31, 2023	$ 4,043	$ 50	546,169		74	(465,251)	85,085
Balance Ending (in shares) at Mar. 31, 2023	4,300	49,665,117		7,307
Balance Beginning at Dec. 31, 2022	$ 4,043	$ 50	542,428			(430,521)	$ 116,000
Balance Beginning (in shares) at Dec. 31, 2022	4,300	49,642,767		7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Issuance of common stock in connection with at-the-market facility offering (average price of $7.17 per share), net of expenses of $529 (in shares)							0
Balance Ending at Sep. 30, 2023		$ 55	584,710		(71)	(530,157)	$ 54,537
Balance Ending (in shares) at Sep. 30, 2023		54,573,490		7,307
Balance Beginning at Mar. 31, 2023	$ 4,043	$ 50	546,169		74	(465,251)	85,085
Balance Beginning (in shares) at Mar. 31, 2023	4,300	49,665,117		7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Stock-based compensation expense			3,891				3,891
Net issuance of common stock in connection with the vesting of restricted stock (in shares)		11,625
Exercise of stock options			485				485
Exercise of stock options (in shares)		72,440
Conversion of convertible preferred stock into common	$ (4,043)	$ 1	4,042
Conversion of convertible preferred stock into common stock (in shares)	(4,300)	860,000
Unrealized gain (loss) on short-term investments					(188)		(188)
Net income (loss)						(31,934)	(31,934)
Balance Ending at Jun. 30, 2023		$ 51	554,587		(114)	(497,185)	57,339
Balance Ending (in shares) at Jun. 30, 2023		50,609,182		7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Stock-based compensation expense			4,006				4,006
Net issuance of common stock in connection with the vesting of restricted stock (in shares)		224,170
Exercise of stock options			298				298
Exercise of stock options (in shares)		50,338
Issuance of common stock in connection with at-the-market facility offering (average price of $7.17 per share), net of expenses of $529		$ 4	25,819				$ 25,823
Issuance of common stock in connection with at-the-market facility offering (average price of $7.17 per share), net of expenses of $529 (in shares)		3,689,800					0
Unrealized gain (loss) on short-term investments					43		$ 43
Net income (loss)						(32,972)	(32,972)
Balance Ending at Sep. 30, 2023		$ 55	584,710		(71)	(530,157)	54,537
Balance Ending (in shares) at Sep. 30, 2023		54,573,490		7,307
Balance Beginning at Dec. 31, 2023		$ 55	588,656		(20)	(571,926)	16,765
Balance Beginning (in shares) at Dec. 31, 2023		54,578,121		7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Stock-based compensation expense			5,193				5,193
Net issuance of common stock in connection with the vesting of restricted stock (in shares)		295,256
Exercise of stock options			257				257
Exercise of stock options (in shares)		57,665
Unrealized gain (loss) on short-term investments					20		20
Net income (loss)						(38,669)	(38,669)
Balance Ending at Mar. 31, 2024		$ 55	594,106			(610,595)	(16,434)
Balance Ending (in shares) at Mar. 31, 2024		54,931,042		7,307
Balance Beginning at Dec. 31, 2023		$ 55	588,656		$ (20)	(571,926)	$ 16,765
Balance Beginning (in shares) at Dec. 31, 2023		54,578,121		7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Issuance of common stock in connection with at-the-market facility offering (average price of $7.17 per share), net of expenses of $529 (in shares)							0
Net income (loss)							$ (98,700)
Balance Ending at Sep. 30, 2024		$ 55	603,853			(670,648)	(66,740)
Balance Ending (in shares) at Sep. 30, 2024		55,185,622		7,307
Balance Beginning at Mar. 31, 2024		$ 55	594,106			(610,595)	(16,434)
Balance Beginning (in shares) at Mar. 31, 2024		54,931,042		7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Stock-based compensation expense			4,917				4,917
Net issuance of common stock in connection with the vesting of restricted stock (in shares)		32,877
Net income (loss)						(35,828)	(35,828)
Balance Ending at Jun. 30, 2024		$ 55	599,023			(646,423)	(47,345)
Balance Ending (in shares) at Jun. 30, 2024		54,963,919		7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Stock-based compensation expense			4,830				$ 4,830
Net issuance of common stock in connection with the vesting of restricted stock (in shares)		221,703
Issuance of common stock in connection with at-the-market facility offering (average price of $7.17 per share), net of expenses of $529 (in shares)							0
Net income (loss)						(24,225)	$ (24,225)
Balance Ending at Sep. 30, 2024		$ 55	$ 603,853			$ (670,648)	$ (66,740)
Balance Ending (in shares) at Sep. 30, 2024		55,185,622		7,307

CONSOLIDATED STATEMENTS OF (DEFICIT) EQUITY (Parenthetical) $ in Thousands	3 Months Ended
	Sep. 30, 2023 USD ($) $ / shares
CONSOLIDATED STATEMENTS OF (DEFICIT) EQUITY
Share Price (in dollars per share) \| $ / shares	$ 7.17
Stock issuance costs \| $	$ 529

Description of the Business and Liquidity

9 Months Ended

Sep. 30, 2024

Description of the Business and Liquidity

Description of the Business and Liquidity

1. Description of the Business and Liquidity

Liquidity

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2024

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

Basis of Presentation

Use of Estimates

Product Revenue, net

Federal Contract Revenue

Collaboration and Licensing Revenue

Short-term Investments

Accounts Receivable, net

Inventory

Debt Issuance Costs

Contract Liabilities, net

Liability Related to Revenue Interest Financing and Non-Cash Interest Expense

Cash, Cash Equivalents and Short-Term Investments

9 Months Ended

Sep. 30, 2024

Cash, Cash Equivalents and Short-Term Investments

Cash, Cash Equivalents and Short-Term Investments

3. Cash, Cash Equivalents and Short-Term Investments

The following table provides details regarding our portfolio of Short-term investments (in thousands) as of December 31, 2023:


	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
December 31, 2023
U.S. Treasury securities	$	26,852	$	138	$	(155)	$	26,835
U.S. Government Agency securities		2,884		31		(34)		2,881
Total	$	29,736	$	169	$	(189)	$	29,716

Fair Value Measurements

9 Months Ended

Sep. 30, 2024

Fair Value Measurements

Fair Value Measurements

4. Fair Value Measurements

The fair value hierarchy is broken down into three levels based on the source of inputs as follows:

●

Level 1 — Valuations based on unadjusted quoted prices in active markets for identical assets or liabilities.

●

Level 2 — Valuations based on observable inputs and quoted prices in active markets for similar assets and liabilities.

●

Level 3 — Valuations based on inputs that are unobservable and models that are significant to the overall fair value measurement.

The following fair value hierarchy table presents information about each major category of our financial assets and liabilities measured at fair value on a recurring basis (in thousands):


	Level 1		Level 2		Level 3		Total
September 30, 2024
Assets
Cash	$	1,092	$	—	$	—	$	1,092
Money market funds (cash equivalents)		41,092		—		—		41,092
U.S. Treasury securities		—		—		—		—
Total assets	$	42,184	$	—	$	—	$	42,184
December 31, 2023
Assets
Cash	$	1,255	$	—	$	—	$	1,255
Money market funds (cash equivalents)		119,317		—		—		119,317
U.S. Treasury securities		—		26,835		—		26,835
Agency securities		—		2,881		—		2,881
Total assets	$	120,572	$	29,716	$	—	$	150,288

Inventory

9 Months Ended

Sep. 30, 2024

Inventory

Inventory

5. Inventory

Inventories are stated at actual costs and consisted of the following (in thousands):


	September 30,		December 31,
	2024		2023
Raw materials	$	4,806	$	436
Work in process		1,560		1,075
Finished goods		351		902
Total Inventories	$	6,717	$	2,413

Accrued Expenses

9 Months Ended

Sep. 30, 2024

Accrued Expenses

Accrued Expenses

6. Accrued Expenses

Accrued expenses consisted of the following (in thousands):


	September 30,		December 31,
	2024		2023
Payroll and related costs	$	2,129	$	7,746
Clinical trials and drug development		3,867		4,701
Accrued license agreement payment		—		4,000
Professional fees		858		1,236
Selling and commercial liabilities		6,106		3,901
Short-term lease liabilities		804		774
Other		395		501
Total accrued expenses	$	14,159	$	22,859

Loss Per Share of Common Stock

9 Months Ended

Sep. 30, 2024

Loss Per Share of Common Stock

Loss Per Share of Common Stock

7. Loss Per Share of Common Stock

The following potentially dilutive securities have been excluded from the computation of diluted weighted-average shares of common stock outstanding, as they would be anti-dilutive:



	September 30,
	2024	2023
Restricted stock awards and restricted stock units	2,142,272	1,265,316
Stock options	8,423,068	7,188,661
	10,565,340	8,453,977

Stockholders' Equity

9 Months Ended

Sep. 30, 2024

Stockholders' Equity

Stockholders' Equity

8. Stockholders’ Equity

Stock Options

Restricted Stock Units

Total compensation cost recognized for all stock options, restricted stock awards and restricted stock units in the statements of operations is as follows (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2024		2023		2024		2023
Research and development	$	1,353	$	1,519	$	4,629	$	4,329
Selling, general and administrative		3,477		2,487		9,981		7,309
Restructuring costs		—		—		330		—
Total	$	4,830	$	4,006	$	14,940	$	11,638

Preferred Stock

Underwritten Public Offering

Sales Pursuant to Equity Distribution Agreement

Commitments and Contingencies

9 Months Ended

Sep. 30, 2024

Commitments and Contingencies

Commitments and Contingencies

9. Commitments and Contingencies

Leases

Maturities of operating lease liabilities as of September 30, 2024 were as follows (in thousands):




Remainder of 2024	$	211
2025		642
		853
Less: imputed interest		(49)
Total lease liabilities	$	804

Current operating lease liabilities	$	804
Non-current operating lease liabilities		—
Total lease liabilities	$	804

Contingencies

Notes Payable

9 Months Ended

Sep. 30, 2024

Notes Payable

Notes Payable

10. Notes Payable

The following table summarizes the composition of Notes payable as reflected on the consolidated balance sheet as of September 30, 2024 (in thousands):


Gross proceeds	$	75,000
Contractual exit fees		2,003
Principal payments including associated exit fees		(19,251)
Unamortized debt discount and issuance costs		(2,564)
Total note payable	$	55,188

Current portion of note payable		13,475
Non-current portion of note payable		41,713
Total note payable	$	55,188

The aggregate maturities of Notes payable as of September 30, 2024 are as follows (in thousands):


Remainder of 2024	$	1,875
2025		15,000
2026		39,375
Total	$	56,250

Revenue Interest Financing Agreement

9 Months Ended

Sep. 30, 2024

Revenue Interest Financing Agreement

Revenue Interest Financing Agreement

11. Revenue Interest Financing Agreement

Agreement (the Amendment) with Sagard, to, among other things, remove the minimum liquidity covenant therein so long as the obligations under the Oaktree Credit Agreement are outstanding.

In connection with the Revenue Interest Financing Agreement, on the Closing Date, we entered into the Credit Agreement Amendment with Oaktree which is fully described in Note 10.

The following table summarizes the activity of the Revenue Interest Financing Agreement for the nine months ended September 30, 2023 and September 30, 2024 (in thousands):



For the nine months ended September 30, 2023
Revenue Interest Financing Balance at December 31, 2022	$	30,877
Non-cash interest expense in the nine months ended September 30, 2023		4,421
Amortization of debt discount in the nine months ended September 30, 2023		194
Payments made in the nine months ended September 30, 2023		(736)
Revenue Interest Financing Balance at September 30, 2023	$	34,756

Current portion of revenue interest financing liability		1,901
Long-term portion of revenue interest financing liability		32,855
Revenue Interest Financing Balance at September 30, 2023	$	34,756

For the nine months ended September 30, 2024
Revenue Interest Financing Balance at December 31, 2023	$	35,977
Non-cash interest expense in the nine months ended September 30, 2024		4,528
Amortization of debt discount in the nine months ended September 30, 2024		441
Payments made in the nine months ended September 30, 2024		(1,744)
Revenue Interest Financing Balance at September 30, 2024	$	39,202

Current portion of revenue interest financing liability	$	3,163
Long-term portion of revenue interest financing liability		36,039
Revenue Interest Financing Balance at September 30, 2024	$	39,202

Collaboration Revenue

9 Months Ended

Sep. 30, 2024

Collaboration Revenue

Collaboration Revenue

12. Collaboration Revenue

Orion Collaboration Agreement

price of the Development and Regulatory Activities and the Supply of Licensed Product was estimated using the expected cost-plus margin approach.

Transaction Price and Net Contract Liability as of December 31, 2023:


			Cumulative Collaboration
	Transaction		Revenue Recognized		Contract
	Price		as of December 31, 2023		Liability
License	$	21,660	$	21,660	$	-
Development and Regulatory Services		6,717		2,511		4,206
Supply of Licensed Product		9,503		-		9,503
	$	37,880	$	24,171	$	13,709

Less Total Contract Asset						2,912
Net Contract Liability					$	10,797

Transaction Price and Net Contract Liability as of September 30, 2024:


			Cumulative Collaboration
	Transaction		Revenue Recognized		Contract
	Price		as of September 30, 2024		Liability
License	$	21,660	$	21,660	$	-
Development and Regulatory Services		6,717		3,529		3,188
Supply of Licensed Product		9,503		-		9,503
	$	37,880	$	25,189	$	12,691

Less Total Contract Asset						1,277
Net Contract Liability					$	11,414

Tenacia Collaboration Agreement

Transaction Price and Net Contract Liability as of September 30, 2024 and December 31, 2023:


			Cumulative Collaboration
	Transaction		Revenue Recognized		Contract
	Price		as of September 30, 2024 and December 31, 2023		Liability
License	$	2,998	$	2,998	$	-
Supply of Licensed Product		7,002		-		7,002
	$	10,000	$	2,998	$	7,002

Less Total Contract Asset						700
Net Contract Liability					$	6,302

Biologix Distribution and Supply Agreement

Restructuring Costs

9 Months Ended

Sep. 30, 2024

Restructuring Costs

Restructuring Costs

13. Restructuring Costs

The following table summarizes the restructuring balances at September 30, 2024 (in thousands):


Restructuring costs payable at December 31, 2023	$	—
Restructuring costs incurred the nine months ended September 30, 2024:
Personnel costs, including severance and related costs		1,193
Clinical equipment contract termination costs		759
Restructuring costs paid in the nine months ended September 30, 2024		(1,622)
Less noncash stock-based compensation expense related to RIF		(330)
Total Restructuring costs payable at September 30, 2024	$	—

Subsequent Events

9 Months Ended

Sep. 30, 2024

Subsequent Events

Subsequent Events

14. Subsequent Events

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024
Pay vs Performance Disclosure
Net Income (Loss)	$ (24,225)	$ (35,828)	$ (38,669)	$ (32,972)	$ (31,934)	$ (34,730)	$ (98,700)

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2024
Summary of Significant Accounting Policies
Basis of Presentation	Basis of Presentation The accompanying unaudited interim consolidated financial statements include the accounts of Marinus Pharmaceuticals, Inc. (a Delaware corporation) as well as the accounts of Marinus Pharmaceuticals Emerald Limited (an Ireland company incorporated in February 2021), a wholly owned subsidiary requiring consolidation. Marinus Pharmaceuticals Emerald Limited serves as a corporate presence in the European Union for regulatory purposes. The unaudited interim consolidated financial statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Accordingly, they do not include all information and disclosures necessary for a presentation of our financial position, results of operations and cash flows in conformity with generally accepted accounting principles in the U.S. (GAAP) for annual financial statements. In the opinion of management, these unaudited interim consolidated financial statements reflect all adjustments, consisting primarily of normal recurring accruals, necessary for a fair presentation of our financial position and results of operations and cash flows for the periods presented. The results of operations for interim periods are not necessarily indicative of the results for the full year. These unaudited interim consolidated financial statements should be read in conjunction with the audited financial statements for the year ended December 31, 2023 and accompanying notes thereto included in our Annual Report on Form 10-K filed with the SEC on March 5, 2024.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from such estimates.
Product Revenue, net	Product Revenue, net We recognize ZTALMY revenue in accordance with ASC 606 – Revenue from contracts with customers. Our revenue recognition analysis consists of the following steps: (i) identification of the promised goods in the contract; (ii) determination of whether the promised goods are performance obligations, including whether they are capable of being distinct; (iii) measurement of the transaction price, including the constraint on variable consideration; (iv) allocation of the transaction price to the performance obligations; and (v) recognition of revenue as we satisfy each performance obligation. Our first FDA approved product, ZTALMY, became available for commercial sale and shipment in the third quarter of 2022. We have three customers, one of which, Orsini Pharmaceutical Services, LLC (Orsini), a specialty pharmacy that dispenses ZTALMY directly to patients, represents approximately 98% of our ZTALMY revenue to date. Our contract with Orsini has a single performance obligation to deliver ZTALMY upon receipt of a purchase order, which is satisfied when Orsini receives ZTALMY. We recognize ZTALMY revenue at the point in time when control of ZTALMY is transferred to Orsini, which is upon delivery to Orsini. The transaction price that we recognize for ZTALMY revenue includes an estimate of variable consideration. Shipping and handling costs to Orsini are recorded as selling, general and administrative expenses. The components of variable consideration include: Trade Discounts and Allowances. We provide contractual discounts, including incentive prompt payment discounts and chargebacks. Each of these potential discounts is recorded as a reduction of ZTALMY revenue and Accounts receivable in the period in which the related ZTALMY revenue is recognized. We estimate the amount of variable consideration for all discounts and allowances using the expected value method. Product Returns and Recall. We provide for ZTALMY returns in accordance with our Return Good Policy. We estimate the amount of ZTALMY that may be returned using the expected value method, and we present this amount as a reduction of ZTALMY revenue in the period the related ZTALMY revenue is recognized. In the event of a recall, we will promptly notify Orsini and will reimburse Orsini for direct administrative expenses incurred in connection with the recall as well as the cost of replacement product. Government Rebates. We are subject to discount obligations under state Medicaid programs, Medicare and the Tricare Retail Refund Program. We estimate reserves related to these discount programs and record these obligations in the same period the related revenue is recognized, resulting in a reduction of ZTALMY revenue. Patient Assistance. We offer a voluntary co-pay patient assistance program intended to provide financial assistance to eligible patients with a prescription drug co-payment required by payors and coupon programs for cash payors. The calculation of the Current liability for this assistance is based on an estimate of claims and the cost per claim that we expect to receive associated with ZTALMY that has been recognized as Product revenue but remains in the distribution channel inventories at the end of each reporting period.
Federal Contract Revenue	Federal Contract Revenue We recognize Federal contract revenue from the BARDA Contract in the period in which the allowable research and development expenses are incurred, and receivables associated with this revenue are included within Accounts receivable, net on our interim consolidated balance sheets. This revenue is not within the scope of ASC 606 – Revenue from contracts with customers.
Collaboration and Licensing Revenue	Collaboration and Licensing Revenue We may enter into collaboration and licensing arrangements for research and development, manufacturing, and commercialization activities with counterparties for the development and commercialization of our product candidates. These arrangements may contain multiple components, such as (i) licenses, (ii) research and development activities, and (iii) the manufacturing of certain material. Payments pursuant to these arrangements may include non-refundable and refundable payments, payments upon the achievement of significant regulatory, development and commercial milestones, sales of product at certain agreed-upon amounts, and royalties on product sales. The amount of variable consideration is constrained until it is probable that the revenue is not at a significant risk of reversal in a future period. In determining the appropriate amount of revenue to be recognized as we fulfill our obligations under a collaboration agreement, we perform the following steps: (i) identification of the promised goods or services in the contract; (ii) determination of whether the promised goods or services are performance obligations, including whether they are capable of being distinct; (iii) measurement of the transaction price, including the constraint on variable consideration; (iv) allocation of the transaction price to the performance obligations; and (v) recognition of revenue as we satisfy each performance obligation. We must develop estimates and assumptions that require judgment to determine the underlying stand-alone selling price for each performance obligation, which determines how the transaction price is allocated among the performance obligations. The estimation of the stand-alone selling price may include such estimates as forecasted revenues and costs, development timelines, discount rates and probabilities of regulatory and commercial success. We also apply significant judgment when evaluating whether contractual obligations represent distinct performance obligations, allocating transaction price to performance obligations within a contract, determining when performance obligations have been met, assessing the recognition and future reversal of variable consideration and determining and applying appropriate methods of measuring progress for performance obligations satisfied over time.
Short-term Investments	Short-term Investments We classify our Short-term investments as available-for-sale securities, which include U.S. government agency debt securities and U.S. treasury debt securities with original maturities of greater than three months. These securities are carried at fair market value, with unrealized gains and losses reported in Other comprehensive loss and Accumulated other comprehensive income (loss) within stockholders’ equity (deficit). We did not have any investments as of September 30, 2024. All of our investments were short-term in nature as of September 30, 2023.
Accounts Receivable, net	Accounts Receivable, net Net trade receivables related to ZTALMY sales, which are recorded in Accounts receivable, net on the consolidated balance sheets, were approximately $3.3 million and $2.6 million as of September 30, 2024 and December 31, 2023, respectively. As of both September 30, 2024 and December 31, 2023, we had no allowance for doubtful accounts. An allowance for doubtful accounts is determined based on our assessment of the credit worthiness and financial condition of our customers, aging of receivables, as well as the general economic environment. Any allowance would reduce the net receivables to the amount that is expected to be collected. We have three customers, one of which, Orsini Pharmaceutical Services, LLC (Orsini), a specialty pharmacy that dispenses ZTALMY directly to patients, represents approximately 98% of our ZTALMY revenue to date. Payment terms for Orsini are 30 days from the shipment date. Excluding net trade receivables, Accounts receivable, net represents amounts due to us under the BARDA contract for valid expenditures expected to be reimbursed to us under the terms of the BARDA contract and current amounts due to us from Orion under the collaboration agreement (Note 12).
Inventory	Inventory Inventories are recorded using actual costs and may consist of raw materials (ganaxolone API), work in process and finished goods. We began capitalizing Inventory related to ZTALMY subsequent to the March 2022 FDA approval of ZTALMY, as the related costs were expected to be recoverable through the commercialization and subsequent sale of ZTALMY. Prior to FDA approval of ZTALMY, costs estimated at approximately $2.0 million for commercially saleable product and materials were incurred and included in Research and development expenses. As a result, Cost of product revenues related to ZTALMY initially reflected a lower average per unit cost of materials and continued to do so into the second quarter of 2024, as previously expensed inventory was utilized for commercial production and sold to customers. We expect Cost of product revenues related to ZTALMY to begin to reflect the current on-going average per unit cost of materials for the remainder of 2024 and thereafter.
Debt Issuance Costs	Debt Issuance Costs Debt issuance costs incurred in connection with Note payable (Note 10) and Revenue interest financing payable (Note 11) are amortized to Interest expense over the term of the respective financing arrangement using the effective-interest method. Debt issuance costs, net of related amortization, are deducted from the carrying value of the related debt.
Contract Liabilities, net	Contract Liabilities, net When consideration is received, or such consideration is unconditionally due, from a customer prior to completing our performance obligation to the customer under the terms of a contract, a Contract liability is recorded. Contract liabilities expected to be recognized as revenue or a reduction of expense within the 12 months following the balance sheet date are classified as Current liabilities. Contract liabilities not expected to be recognized as revenue within the 12 months following the balance sheet date are classified as Long-term liabilities. In accordance with ASC 210-20, our Contract liabilities were partially offset by our Contract assets at September 30, 2024, as further discussed in Note 12.
Liability Related to Revenue Interest Financing and Non-Cash Interest Expense	Liability Related to Revenue Interest Financing and Non-Cash Interest Expense In October 2022, we recognized a liability related to the Revenue Interest Financing Agreement with Sagard Healthcare Royalty Partners, LP (Sagard) under ASC 470-10 Debt and ASC 835-30 Interest - Imputation of Interest. The initial funds received by us from Sagard pursuant to the terms of the Revenue Interest Financing Agreement were recorded as a liability and will be accreted under the effective interest method upon the estimated amount of future royalty payments to be made pursuant to the Revenue Interest Financing Agreement. The issuance costs were recorded as a direct deduction to the carrying amount of the liability and will be amortized under the effective interest method over the estimated period the liability will be repaid. We estimated the total amount of future product revenue to be generated over the life of the Revenue Interest Financing Agreement, and a significant increase or decrease in these estimates could materially impact the liability balance and the related Interest expense. If the timing or amounts of any estimated future revenue and related payments change, we will prospectively adjust the effective interest and the related amortization of the liability and related issuance costs. The liability related to the Revenue Interest Financing Agreement with Sagard is further discussed in Note 11.

Cash, Cash Equivalents and Short-Term Investments (Tables)

9 Months Ended

Sep. 30, 2024

Cash, Cash Equivalents and Short-Term Investments

Schedule of short-term investments


	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
December 31, 2023
U.S. Treasury securities	$	26,852	$	138	$	(155)	$	26,835
U.S. Government Agency securities		2,884		31		(34)		2,881
Total	$	29,736	$	169	$	(189)	$	29,716

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2024

Fair Value Measurements

Summary of major categories of financial assets and liabilities measured at fair value on a recurring basis

The following fair value hierarchy table presents information about each major category of our financial assets and liabilities measured at fair value on a recurring basis (in thousands):


	Level 1		Level 2		Level 3		Total
September 30, 2024
Assets
Cash	$	1,092	$	—	$	—	$	1,092
Money market funds (cash equivalents)		41,092		—		—		41,092
U.S. Treasury securities		—		—		—		—
Total assets	$	42,184	$	—	$	—	$	42,184
December 31, 2023
Assets
Cash	$	1,255	$	—	$	—	$	1,255
Money market funds (cash equivalents)		119,317		—		—		119,317
U.S. Treasury securities		—		26,835		—		26,835
Agency securities		—		2,881		—		2,881
Total assets	$	120,572	$	29,716	$	—	$	150,288

Inventory (Tables)

9 Months Ended

Sep. 30, 2024

Inventory

Schedule of inventory

Inventories are stated at actual costs and consisted of the following (in thousands):


	September 30,		December 31,
	2024		2023
Raw materials	$	4,806	$	436
Work in process		1,560		1,075
Finished goods		351		902
Total Inventories	$	6,717	$	2,413

Accrued Expenses (Tables)

9 Months Ended

Sep. 30, 2024

Accrued Expenses

Schedule of accrued expenses

Accrued expenses consisted of the following (in thousands):


	September 30,		December 31,
	2024		2023
Payroll and related costs	$	2,129	$	7,746
Clinical trials and drug development		3,867		4,701
Accrued license agreement payment		—		4,000
Professional fees		858		1,236
Selling and commercial liabilities		6,106		3,901
Short-term lease liabilities		804		774
Other		395		501
Total accrued expenses	$	14,159	$	22,859

Loss Per Share of Common Stock (Tables)

9 Months Ended

Sep. 30, 2024

Loss Per Share of Common Stock

Schedule of antidilutive securities excluded from the computation of diluted weighted average shares outstanding



	September 30,
	2024	2023
Restricted stock awards and restricted stock units	2,142,272	1,265,316
Stock options	8,423,068	7,188,661
	10,565,340	8,453,977

Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2024

Stockholders' Equity

Schedule of total compensation cost recognized in the statement of operations

Total compensation cost recognized for all stock options, restricted stock awards and restricted stock units in the statements of operations is as follows (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2024		2023		2024		2023
Research and development	$	1,353	$	1,519	$	4,629	$	4,329
Selling, general and administrative		3,477		2,487		9,981		7,309
Restructuring costs		—		—		330		—
Total	$	4,830	$	4,006	$	14,940	$	11,638

Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2024

Commitments and Contingencies

Schedule of maturities of operating lease liabilities

Maturities of operating lease liabilities as of September 30, 2024 were as follows (in thousands):




Remainder of 2024	$	211
2025		642
		853
Less: imputed interest		(49)
Total lease liabilities	$	804

Current operating lease liabilities	$	804
Non-current operating lease liabilities		—
Total lease liabilities	$	804

Notes Payable (Tables)

9 Months Ended

Sep. 30, 2024

Notes Payable

Summary of composition of notes payable

The following table summarizes the composition of Notes payable as reflected on the consolidated balance sheet as of September 30, 2024 (in thousands):


Gross proceeds	$	75,000
Contractual exit fees		2,003
Principal payments including associated exit fees		(19,251)
Unamortized debt discount and issuance costs		(2,564)
Total note payable	$	55,188

Current portion of note payable		13,475
Non-current portion of note payable		41,713
Total note payable	$	55,188

Schedule of maturities of notes payable over the next five years

The aggregate maturities of Notes payable as of September 30, 2024 are as follows (in thousands):


Remainder of 2024	$	1,875
2025		15,000
2026		39,375
Total	$	56,250

Revenue Interest Financing Agreement (Tables)

9 Months Ended

Sep. 30, 2024

Revenue Interest Financing Agreement

Summary of the activity of revenue interest financing agreement

The following table summarizes the activity of the Revenue Interest Financing Agreement for the nine months ended September 30, 2023 and September 30, 2024 (in thousands):



For the nine months ended September 30, 2023
Revenue Interest Financing Balance at December 31, 2022	$	30,877
Non-cash interest expense in the nine months ended September 30, 2023		4,421
Amortization of debt discount in the nine months ended September 30, 2023		194
Payments made in the nine months ended September 30, 2023		(736)
Revenue Interest Financing Balance at September 30, 2023	$	34,756

Current portion of revenue interest financing liability		1,901
Long-term portion of revenue interest financing liability		32,855
Revenue Interest Financing Balance at September 30, 2023	$	34,756

For the nine months ended September 30, 2024
Revenue Interest Financing Balance at December 31, 2023	$	35,977
Non-cash interest expense in the nine months ended September 30, 2024		4,528
Amortization of debt discount in the nine months ended September 30, 2024		441
Payments made in the nine months ended September 30, 2024		(1,744)
Revenue Interest Financing Balance at September 30, 2024	$	39,202

Current portion of revenue interest financing liability	$	3,163
Long-term portion of revenue interest financing liability		36,039
Revenue Interest Financing Balance at September 30, 2024	$	39,202

Collaboration Revenue (Tables)

9 Months Ended

Sep. 30, 2024

Collaboration Revenue

Schedule of allocation of the transaction price to the performance obligations


			Cumulative Collaboration
	Transaction		Revenue Recognized		Contract
	Price		as of December 31, 2023		Liability
License	$	21,660	$	21,660	$	-
Development and Regulatory Services		6,717		2,511		4,206
Supply of Licensed Product		9,503		-		9,503
	$	37,880	$	24,171	$	13,709

Less Total Contract Asset						2,912
Net Contract Liability					$	10,797


			Cumulative Collaboration
	Transaction		Revenue Recognized		Contract
	Price		as of September 30, 2024		Liability
License	$	21,660	$	21,660	$	-
Development and Regulatory Services		6,717		3,529		3,188
Supply of Licensed Product		9,503		-		9,503
	$	37,880	$	25,189	$	12,691

Less Total Contract Asset						1,277
Net Contract Liability					$	11,414


			Cumulative Collaboration
	Transaction		Revenue Recognized		Contract
	Price		as of September 30, 2024 and December 31, 2023		Liability
License	$	2,998	$	2,998	$	-
Supply of Licensed Product		7,002		-		7,002
	$	10,000	$	2,998	$	7,002

Less Total Contract Asset						700
Net Contract Liability					$	6,302

Restructuring Costs (Tables)

9 Months Ended

Sep. 30, 2024

Restructuring Costs

Summary of restructuring balances

The following table summarizes the restructuring balances at September 30, 2024 (in thousands):


Restructuring costs payable at December 31, 2023	$	—
Restructuring costs incurred the nine months ended September 30, 2024:
Personnel costs, including severance and related costs		1,193
Clinical equipment contract termination costs		759
Restructuring costs paid in the nine months ended September 30, 2024		(1,622)
Less noncash stock-based compensation expense related to RIF		(330)
Total Restructuring costs payable at September 30, 2024	$	—

Description of the Business and Liquidity (Details) - USD ($) $ in Thousands			1 Months Ended	3 Months Ended						9 Months Ended
	Nov. 04, 2024	Apr. 30, 2024	Oct. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Dec. 31, 2023
Liquidity
Net loss				$ 24,225	$ 35,828	$ 38,669	$ 32,972	$ 31,934	$ 34,730	$ 98,700
Accumulated deficit				670,648						670,648	$ 571,926
Cash and cash equivalents				$ 42,184						$ 42,184	$ 120,572
Percentage of workforce impacted by RIF		20.00%
Subsequent events
Liquidity
Percentage of workforce impacted by RIF	45.00%		45.00%

Summary of Significant Accounting Policies - Other (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2024 USD ($) customer	Dec. 31, 2023 USD ($)
Product Revenue, net
Number of customers \| customer	3
Accounts Receivable, net
Accounts receivable, net	$ 3,840	$ 3,799
Allowance for doubtful accounts	$ 0	0
Payment terms	30 days
ZTALMY
Accounts Receivable, net
Accounts receivable, net	$ 3,300	$ 2,600
Inventory
Cost of product and materials included in research and development expenses prior to FDA approval	$ 2,000
ZTALMY \| Revenue Benchmark \| Customer Concentration Risk
Product Revenue, net
Number of customers \| customer	1
Concentration risk, as a percent	98.00%

Cash, Cash Equivalents and Short-Term Investments - Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Cash, Cash Equivalents and Short-Term Investments
Cash accounts in banking institutions	$ 1.1	$ 1.3
Money market funds	41.1	119.3
Accrued interest receivable	$ 0.0	$ 0.2

Cash, Cash Equivalents and Short-Term Investments - Short-Term Investments (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Short-term Investments
Amortized Cost	$ 29,736
Unrealized Gains	169
Unrealized Losses	(189)
Fair Value	29,716
U.S. Treasury securities
Short-term Investments
Amortized Cost	26,852
Unrealized Gains	138
Unrealized Losses	(155)
Fair Value	26,835
U.S. Government Agency securities
Short-term Investments
Amortized Cost	2,884
Unrealized Gains	31
Unrealized Losses	(34)
Fair Value	$ 2,881

Fair Value Measurements - Fair Value Recurring Basis (Details) - Recurring basis - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets
Total assets	$ 42,184	$ 150,288
U.S. Treasury securities
Assets
Investments		26,835
Agency securities
Assets
Investments		2,881
Cash
Assets
Cash and cash equivalents	1,092	1,255
Money market funds
Assets
Cash and cash equivalents	41,092	119,317
Level 1
Assets
Total assets	42,184	120,572
Level 1 \| Cash
Assets
Cash and cash equivalents	1,092	1,255
Level 1 \| Money market funds
Assets
Cash and cash equivalents	$ 41,092	119,317
Level 2
Assets
Total assets		29,716
Level 2 \| U.S. Treasury securities
Assets
Investments		26,835
Level 2 \| Agency securities
Assets
Investments		$ 2,881

Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Inventory
Raw materials	$ 4,806	$ 436
Work in process	1,560	1,075
Finished goods	351	902
Total Inventories	$ 6,717	$ 2,413

Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Accrued Expenses
Payroll and related costs	$ 2,129	$ 7,746
Clinical trials and drug development	3,867	4,701
Accrued license agreement payment		4,000
Professional fees	858	1,236
Selling and commercial liabilities	6,106	3,901
Short-term lease liabilities	804	774
Other	395	501
Total accrued expenses	$ 14,159	$ 22,859

Loss Per Share of Common Stock - Basic and diluted net loss per share as the exercise price (Details)	Nov. 30, 2022 $ / shares
Loss Per Share of Common Stock
Warrant exercise price (in dollars per share)	$ 0.001

Loss Per Share of Common Stock - Anti-dilutive securities (Details) - shares	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Antidilutive securities
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	10,565,340	8,453,977
Restricted stock awards and restricted stock units
Antidilutive securities
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	2,142,272	1,265,316
Stock options
Antidilutive securities
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	8,423,068	7,188,661

Stockholders' Equity - Other (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 30, 2022	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	May 31, 2024	Jan. 01, 2024
Stockholders' Equity
Total compensation cost		$ 4,830	$ 4,006	$ 14,940	$ 11,638
Maximum percentage of beneficial ownership for exercise of Pre-funded Warrants	9.99%
Maximum percentage increase or decrease of beneficial ownership for exercise of Pre-funded Warrants	19.99%
Threshold limit for giving prior notice	61 days
Public Offering
Stockholders' Equity
Number of shares of common stock issued	12,421,053
Proceeds from Issuance or Sale of Equity	$ 64,500
Number of pre-funded warrants (in shares)	2,105,264
Research and development
Stockholders' Equity
Total compensation cost		1,353	1,519	4,629	4,329
Selling, general and administrative
Stockholders' Equity
Total compensation cost		$ 3,477	$ 2,487	9,981	$ 7,309
Restructuring costs
Stockholders' Equity
Total compensation cost				$ 330
Series A Convertible Preferred Stock
Shares
Conversion of Series A Convertible Preferred Stock (in shares)		0	0	0
Preferred stock, shares outstanding		0	4,300	0	4,300
Number of common shares issuable upon conversion of stock			860,000		860,000
Employee Stock Option
Stock Options
Outstanding (in shares)		8,423,068		8,423,068
Outstanding, weighted-average exercise price (in dollars per share)		$ 8.94		$ 8.94
Granted (in shares)				2,430,868
Granted (in dollars per share)				$ 7.11
Restricted Stock Units
Stockholders' Equity
Vesting period				3 years
Shares
Issued (in shares)				1,963,350
Awards outstanding (in shares)		2,142,272		2,142,272
2014 Plan
Stockholders' Equity
Common stock reserved for issuance (in shares)		0		0			3,090,220
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant							0
2014 Plan \| Employee Stock Option
Stock Options
Outstanding (in shares)		5,916,369		5,916,369
Granted (in shares)				1,540,519
Equity Incentive Plan, Employee Inducements \| Employee Stock Option
Stock Options
Outstanding (in shares)		1,768,122		1,768,122
Granted (in shares)				123,975
2024 Plan
Stockholders' Equity
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant		3,885,857		3,885,857
Stock Options
Outstanding (in shares)		738,577		738,577
2024 Plan \| Maximum
Stockholders' Equity
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized						4,000,000
2024 Plan \| Employee Stock Option
Stock Options
Granted (in shares)				766,374

Stockholders' Equity - Equity Distribution Agreement (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Jul. 09, 2020
Stockholders' Equity
Maximum value of shares that may be issued and sold under Equity Distribution Agreement	$ 48,600,000		$ 48,600,000		$ 75,000,000
Maximum commission rate, expressed as a percentage of the gross proceeds from each sale of shares of common stock, equity distribution agreement			3.00%
Issuance of shares under equity distribution agreement (in shares)	0	0	0	0

Commitments and Contingencies - Leases (Details)	9 Months Ended
Commitments and Contingencies - Leases (Details)	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Commitments and Contingencies
Right-of-use assets	$ 500,000	$ 1,000,000.0
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Operating lease liabilities	$ 804,000	$ 1,400,000
Gain (loss) on termination of lease	$ 800,000
Real estate
Commitments and Contingencies
Operating lease agreement term	78 months
Operating lease renewal term	60 months
Weighted average remaining lease term	12 months
Number of leases entered	1
Clinical site equipment
Commitments and Contingencies
Operating lease agreement term	18 months

Commitments and Contingencies - Lease costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Commitments and Contingencies
Total lease costs	$ 100	$ 100	$ 1,400	$ 400
Weighted-average incremental borrowing rate used to determine right-of-use assets and lease liabilities	11.00%		11.00%
Impairment losses of ROU assets	$ 0		$ 757		$ 0
Maximum
Commitments and Contingencies
Short-term operating lease costs	$ 100	$ 100	$ 100	$ 100

Commitments and Contingencies - Maturities of operating lease liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Maturities of operating lease liabilities:
Remainder of 2024	$ 211
2025	642
Total lease payments	853
Less: imputed interest	(49)
Total lease liabilities	804	$ 1,400
Current operating lease liabilities	$ 804
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued Liabilities, Current	Accrued Liabilities, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Accrued Liabilities, Noncurrent	Other Accrued Liabilities, Noncurrent

Notes Payable - Narratives (Details) $ in Thousands			1 Months Ended				9 Months Ended
Notes Payable - Narratives (Details) $ in Thousands	Jun. 06, 2024 USD ($)	May 11, 2021 USD ($) tranche	Jun. 30, 2024 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2021 USD ($)	May 31, 2021 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Aug. 31, 2023 USD ($)	Oct. 31, 2022	Oct. 27, 2022 USD ($)	Sep. 30, 2022
Notes Payable
Contractual exit fees							$ 2,003
Amortization of debt issuance costs							2,278	$ 1,659
Total debt commitments							75,000		$ 58,100
Minimum liquidity covenant, cash and cash equivalents							$ 15,000
Debt Instrument Principal payments Reduction Percentage							50.00%
From 2025 to Maturity Date
Notes Payable
Percentage of periodic principal payment		5.00%
Term Loan Tranche B
Notes Payable
Repayments of Lines of Credit	$ 15,000		$ 15,000
Penalty for prepayment							$ 300
Term Loan Tranche C
Notes Payable
Debt commitment, terminated									$ 25,000
Oaktree Capital Management LP Credit Agreement
Notes Payable
Term of loan facility		5 years
Maximum borrowing capacity available under the credit agreement		$ 125,000
Number of tranches \| tranche		5
Proceeds from line of credit				$ 30,000	$ 30,000	$ 15,000
Accrued interest rate (as a percent)		11.50%
Upfront fee (as a percent)		2.00%
Commitment fee (as a percent)		0.75%
Commitment fee accrual period		120 days
Debt issuance costs											$ 500
Debt issuance costs				1,800	1,200	4,400
Contractual exit fees					600	300
Interest expense							7,800
Interest on term loan							6,300
Amortization of debt issuance costs							$ 1,500
Exit fee, percentage		2.67%								2.67%	2.00%	2.00%
Oaktree Capital Management LP Credit Agreement \| Maximum
Notes Payable
Contractual exit fees				600
Oaktree Capital Management LP Credit Agreement \| Scenario Of Prepayment Between May 11, 2024 To May 11, 2025
Notes Payable
Prepayment premium (as a percent)		2.00%
Oaktree Capital Management LP Credit Agreement \| Scenario Of Prepayment After May 11, 2025
Notes Payable
Prepayment premium (as a percent)		0.00%
Oaktree Capital Management LP Credit Agreement \| Beginning on June 30, 2024 And Continuing Until 2025
Notes Payable
Percentage of periodic principal payment		2.50%
Oaktree Capital Management LP Credit Agreement \| Term Loans Tranche A-1
Notes Payable
Proceeds from line of credit						$ 15,000
Oaktree Capital Management LP Credit Agreement \| Term Loans Tranche A-2
Notes Payable
Proceeds from line of credit					$ 30,000
Oaktree Capital Management LP Credit Agreement \| Term Loan Tranche B
Notes Payable
Proceeds from line of credit				30,000
Oaktree Capital Management LP Credit Agreement \| Term Loan Tranche B \| Maximum
Notes Payable
Commitment fees				$ 100

Notes Payable - Composition of debt (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Aug. 31, 2023
Notes Payable
Gross proceeds	$ 75,000		$ 58,100
Contractual exit fees	2,003
Principal payments including associated exit fees	(19,251)
Unamortized debt discount and issuance costs	(2,564)
Total note payable	55,188
Current portion of note payable	13,475	$ 11,551
Non-current portion of note payable	$ 41,713	$ 61,423

Notes Payable - Debt maturities (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Notes Payable
Remainder of 2024	$ 1,875
2025	15,000
2026	39,375
Total	$ 56,250

Revenue Interest Financing Agreement - Terms (Details) - USD ($) $ in Millions			1 Months Ended	9 Months Ended
	Oct. 24, 2024	Oct. 28, 2022	Jun. 30, 2024	Sep. 30, 2024
Revenue Interest Financing Agreement
Total issuance costs			$ 0.1	$ 2.6
Estimated effective annual interest rate, percentage				17.00%
Each calendar quarter from and after the Closing Date through and including the quarter ended June 30, 2026 \| Sagard
Revenue Interest Financing Agreement
Quarterly payments expressed as a percentage of the U.S. net sales of Ztalmy and all other pharmaceutical products that contain ganaxolene, required under the revenue interest financing agreement.		7.50%
Revenue Interest Financing Agreement \| Oaktree Capital Management LP Credit Agreement
Revenue Interest Financing Agreement
Minimum cash and cash equivalents required to be maintained deposits after repayment		$ 10.0
Revenue Interest Financing Agreement \| Sagard
Revenue Interest Financing Agreement
Investment amount		$ 32.5
Hard Cap expressed as a percentage of the Investment Amount		190.00%
Hard cap amount		$ 61.8
Revenue Interest Financing Agreement \| Each calendar quarter from and after the Closing Date through and including the quarter ended June 30, 2026 \| Sagard
Revenue Interest Financing Agreement
Quarterly payments due, expressed as a percentage of the first $100 million in annual Product Revenue of the Included Products		15.00%
Quarterly payments due, expressed as a percentage of the annual Product Revenue of the Included Products in excess of $100 million		7.50%
Annual Product Revenue Threshold		$ 100.0
Revenue Interest Financing Agreement \| Period Ending December 31, 2027 \| Sagard
Revenue Interest Financing Agreement
Minimum amount expressed as a percentage of the Investment Amount		100.00%
Revenue Interest Financing Agreement \| Period Ending December 31, 2032 \| Sagard
Revenue Interest Financing Agreement
Minimum amount expressed as a percentage of the Investment Amount		190.00%
Revenue Interest Financing Agreement \| On or Before Third Anniversary
Revenue Interest Financing Agreement
Payments at repurchase price investment percent		160.00%
Revenue Interest Financing Agreement \| After Third Anniversary
Revenue Interest Financing Agreement
Payments at repurchase price investment percent		180.00%
Royalty monetization agreement \| After Fourth Anniversary
Revenue Interest Financing Agreement
Payments at repurchase price investment percent		190.00%
Subsequent events
Revenue Interest Financing Agreement
Estimated effective annual interest rate, percentage	13.00%

Revenue Interest Financing Agreement - Summary of Activity (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Revenue Interest Financing Agreement
Revenue Interest Financing Starting Balance	$ 35,977	$ 30,877
Non-cash interest expense	4,528	4,421
Amortization of debt discount	441	194
Payments	(1,744)	(736)
Revenue Interest Financing Ending Balance	39,202	34,756
Current portion of revenue interest financing liability	3,163	1,901	$ 2,211
Long-term portion of revenue interest financing liability	36,039	32,855	33,766
Revenue Interest Financing Balance	$ 39,202	$ 34,756	$ 35,977

Collaboration Revenue - Narrative (Details) $ in Thousands, € in Millions			1 Months Ended			3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 30, 2021 USD ($)	Jul. 30, 2021 EUR (€) item	Jul. 31, 2023 EUR (€)	May 31, 2023 USD ($)	Dec. 31, 2022 USD ($) item product	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($) item	Dec. 31, 2023 USD ($)
License and Collaboration Revenue
Contract liability						$ 400	$ 500	$ 400	$ 500
Net Contract Liability						18,108		18,108			$ 17,545
Collaboration revenue
License and Collaboration Revenue
Collaboration revenue						17	18	53	36
Collaboration Agreement with Orion
License and Collaboration Revenue
Upfront fee received	$ 29,600	€ 25.0
Number of days from receipt of the final report, in which the collaboration agreement may be terminated	90 days	90 days
Percentage of upfront fee which must be refunded in the event of termination		75.00%
Amount of payment receivable upon achievement of specific clinical and commercial achievements \| €		€ 97.0
Term of collaboration agreement	10 years	10 years
Number of performance obligations \| item		3
Collaboration revenue										$ 12,700
Milestone payments receivable for commercial sales \| €			€ 10.0
Number Of Months After First Commercial Sales.			18 months
Transaction Price						37,880		37,880			37,880
Contract liability						12,691		12,691			13,709
Contract asset						1,277		1,277			2,912
Net Contract Liability						11,414		11,414			10,797
Offset by contract asset						1,277		1,277			2,912
Incremental costs incurred in obtaining the agreement						2,000		2,000
Capitalized contract costs						900		900
Collaboration Agreement with Orion \| Selling, general and administrative
License and Collaboration Revenue
Contract acquisition costs included in selling, general and administrative expense								1,100
Collaboration Agreement with Orion \| License Revenue
License and Collaboration Revenue
Transaction Price						21,660		21,660			21,660
Collaboration Agreement with Orion \| Development and Regulatory Services
License and Collaboration Revenue
Amortization of transaction price as a reduction of research and development costs								1,000
Transaction Price						6,717		6,717			6,717
Contract liability						3,188		3,188			4,206
Collaboration Agreement with Orion \| Supply of License Product
License and Collaboration Revenue
Transaction Price						9,503		9,503			9,503
Contract liability						9,503		9,503			9,503
Collaboration Agreement with Tenacia
License and Collaboration Revenue
Upfront fee received					$ 10,000
Aggregate amount					256,000
Milestone regulatory approvals					15,000
Aggregative sales based milestone					$ 241,000
Number of performance obligations \| item					2					2
Number of commitments represent distinct performance \| item					2					2
Right to receive upfront fee cash payment, number of days after effective date.					45 days
Right to receive royalty, number of years after first commercial sales					10 years
Transaction Price						10,000		10,000			10,000
Contract liability						7,002		7,002			7,002
Contract asset						700		700			700
Net Contract Liability						6,302		6,302			6,302
Offset by contract asset						700		700			700
Incremental costs incurred in obtaining the agreement						1,000		1,000
Capitalized contract costs						700		700
Cost of product revenue								200
Number of Selected Products to which milestone payments applicable \| product					1
Collaboration Agreement with Tenacia \| Selling, general and administrative
License and Collaboration Revenue
Contract acquisition costs included in selling, general and administrative expense								100
Collaboration Agreement with Tenacia \| License Revenue
License and Collaboration Revenue
Collaboration revenue						0	0	0	0
Transaction Price						2,998		2,998			2,998
Collaboration Agreement with Tenacia \| Collaboration revenue
License and Collaboration Revenue
Transaction Price						3,000		3,000			3,000
Collaboration Agreement with Tenacia \| Supply of License Product
License and Collaboration Revenue
Transaction Price						7,002		7,002			7,002
Contract liability						7,002		7,002			$ 7,002
Biologix Distribution and Supply Agreement
License and Collaboration Revenue
Upfront fee received				$ 500
Biologix Distribution and Supply Agreement \| Maximum
License and Collaboration Revenue
Collaboration revenue						$ 100	$ 100	$ 100	$ 100

Collaboration Revenue - Allocation of the transaction price to the performance obligations (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
License and Collaboration Revenue
Contract Liability	$ 400		$ 500
Net Contract Liability	18,108	$ 17,545
Collaboration Agreement with Orion
License and Collaboration Revenue
Transaction Price	37,880	37,880
Cumulative Collaboration Revenue Recognized	25,189	24,171
Contract Liability	12,691	13,709
Less Total Contract Asset	1,277	2,912
Net Contract Liability	11,414	10,797
Collaboration Agreement with Orion \| License Revenue
License and Collaboration Revenue
Transaction Price	21,660	21,660
Cumulative Collaboration Revenue Recognized	21,660	21,660
Collaboration Agreement with Orion \| Development and Regulatory Services
License and Collaboration Revenue
Transaction Price	6,717	6,717
Cumulative Collaboration Revenue Recognized	3,529	2,511
Contract Liability	3,188	4,206
Collaboration Agreement with Orion \| Supply of License Product
License and Collaboration Revenue
Transaction Price	9,503	9,503
Contract Liability	9,503	9,503
Collaboration Agreement with Tenacia
License and Collaboration Revenue
Transaction Price	10,000	10,000
Cumulative Collaboration Revenue Recognized	2,998	2,998
Contract Liability	7,002	7,002
Less Total Contract Asset	700	700
Net Contract Liability	6,302	6,302
Collaboration Agreement with Tenacia \| License Revenue
License and Collaboration Revenue
Transaction Price	2,998	2,998
Cumulative Collaboration Revenue Recognized	2,998	2,998
Collaboration Agreement with Tenacia \| Supply of License Product
License and Collaboration Revenue
Transaction Price	7,002	7,002
Contract Liability	$ 7,002	$ 7,002

Restructuring Costs - Other (Details) - USD ($) $ in Thousands		9 Months Ended
	Apr. 30, 2024	Sep. 30, 2024	Dec. 31, 2023
Restructuring Costs
Percentage of workforce impacted by RIF	20.00%
Restructuring Costs		$ 1,950
Unpaid restructuring costs		0
Employee Severance
Restructuring Costs
Restructuring Costs		1,193
Contract Termination
Restructuring Costs
Restructuring Costs		$ 759

Restructuring Costs - Summary of Changes (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2024 USD ($)
Restructuring Balances
Restructuring costs as of beginning of period
Restructuring costs incurred	1,950
Restructuring costs paid	(1,622)
Less noncash stock-based compensation expense related to RIF	(330)
Restructuring costs payable at end of period	0
Employee Severance
Restructuring Balances
Restructuring costs incurred	1,193
Contract Termination
Restructuring Balances
Restructuring costs incurred	$ 759

Subsequent Events (Details) - USD ($) $ in Millions			1 Months Ended
Subsequent Events (Details) - USD ($) $ in Millions	Nov. 04, 2024	Apr. 30, 2024	Oct. 31, 2024
Subsequent Events
Percentage of workforce impacted by RIF		20.00%
Subsequent events
Subsequent Events
Percentage of workforce impacted by RIF	45.00%		45.00%
Severance and other employee-related costs	$ 1.5

Marinus Pharmaceuticals (NASDAQ:MRNS)
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