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

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)


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

For the Quarterly Period Ended September 28, 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 No. 001-39110

ONTO INNOVATION INC.

(Exact name of registrant as specified in its charter)

    Delaware

    94-2276314

    (State or other jurisdiction of
incorporation or organization)

    (I.R.S. Employer
Identification Number)

16 Jonspin Road, Wilmington, Massachusetts 01887

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (978) 253-6200

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, $0.001 par value per share	ONTO	New York Stock Exchange (NYSE)

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 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 on October 15, 2024 was 49,391,299.

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TABLE OF CONTENTS


Item No.		Page
	PART I FINANCIAL INFORMATION

Item 1.	Financial Statements (unaudited)	1
	Condensed Consolidated Statements of Operations for the three and nine months ended September 28, 2024 and September 30, 2023	1
	Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 28, 2024 and September 30, 2023	2
	Condensed Consolidated Balance Sheets at September 28, 2024 and December 30, 2023	3
	Condensed Consolidated Statements of Cash Flows for the nine months ended September 28, 2024 and September 30, 2023	4
	Condensed Consolidated Statements of Stockholders’ Equity for the three and nine months ended September 28, 2024 and September 30, 2023	5
	Notes to Condensed Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	18
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	24
Item 4.	Controls and Procedures	24

	PART II OTHER INFORMATION

Item 1.	Legal Proceedings	25
Item 1A.	Risk Factors	25
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	41
Item 3.	Defaults Upon Senior Securities	42
Item 4.	Mine Safety Disclosures	42
Item 5.	Other Information	42
Item 6.	Exhibits	43

Signatures

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PART I FINANCIAL INFORMATION

Item 1. Financial Statements

ONTO INNOVATION INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

(Unaudited)


	Three Months Ended						Nine Months Ended
	September 28,			September 30,			September 28,		September 30,
	2024			2023			2024		2023
Revenue	$	252,210		$	207,185		$	723,382	$	597,012
Cost of revenue		115,831			100,333			340,482		284,724
Gross profit		136,379			106,852			382,900		312,288
Operating expenses:
Research and development		28,277			26,136			81,876		80,421
Sales and marketing		19,451			14,755			56,746		46,416
General and administrative		22,465			18,131			60,298		56,130
Amortization		13,114			13,824			39,338		41,473
Total operating expenses		83,307			72,846			238,258		224,440
Operating income		53,072			34,006			144,642		87,848
Interest income, net		8,667			5,694			24,524		13,900
Other (expense) income, net		(724	)		(1,001	)		10		(2,992	)
Income before provision for income taxes		61,015			38,699			169,176		98,756
Provision for income taxes		7,964			2,813			16,323		7,906
Net income	$	53,051		$	35,886		$	152,853	$	90,850
Earnings per share:
Basic	$	1.07		$	0.73		$	3.10	$	1.86
Diluted	$	1.07		$	0.73		$	3.08	$	1.84
Weighted average number of shares outstanding:
Basic		49,426			49,043			49,333		48,933
Diluted		49,694			49,401			49,669		49,259

The accompanying notes are an integral part of these financial statements.

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ONTO INNOVATION INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)

(Unaudited)


	Three Months Ended					Nine Months Ended
	September 28,		September 30,			September 28,		September 30,
	2024		2023			2024		2023
Net income	$	53,051	$	35,886		$	152,853	$	90,850
Other comprehensive income (loss), net of tax:
Change in net unrealized gains on available-for-sale marketable securities		2,162		672			1,304		1,901
Change in currency translation adjustments		4,859		(2,761	)		270		(4,669	)
Total other comprehensive income (loss), net of tax		7,021		(2,089	)		1,574		(2,768	)
Total comprehensive income	$	60,072	$	33,797		$	154,427	$	88,082

The accompanying notes are an integral part of these financial statements.

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ONTO INNOVATION INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands)

(Unaudited)


	September 28, 2024			December 30, 2023
ASSETS
Current Assets:
Cash and cash equivalents	$	188,738		$	233,508
Marketable securities		666,666			464,303
Accounts receivable, less allowance of $2,613 and $2,659		253,716			226,556
Inventories, net		308,304			327,773
Prepaid expenses and other current assets		40,524			31,127
Total current assets		1,457,948			1,283,267
Property, plant and equipment, net		120,090			103,611
Goodwill		315,811			315,811
Identifiable intangible assets, net		128,086			167,375
Deferred income taxes		34,760			18,836
Other assets		16,670			20,812
Total assets	$	2,073,365		$	1,909,712
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	47,986		$	49,869
Accrued liabilities		43,590			42,062
Deferred revenue		26,769			24,763
Other current liabilities		26,391			31,032
Total current liabilities		144,736			147,726
Other non-current liabilities		25,104			25,451
Total liabilities		169,840			173,177
Commitments and contingencies
Stockholders’ equity:
Common stock		49			49
Additional paid-in capital		1,274,592			1,262,029
Accumulated other comprehensive loss		(6,325	)		(7,899	)
Accumulated earnings		635,209			482,356
Total stockholders’ equity		1,903,525			1,736,535
Total liabilities and stockholders’ equity	$	2,073,365		$	1,909,712

The accompanying notes are an integral part of these financial statements.

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ONTO INNOVATION INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)


	Nine Months Ended
	September 28,			September 30,
	2024			2023
Cash flows from operating activities:
Net income	$	152,853		$	90,850
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Amortization of intangibles		39,338			41,473
Depreciation		10,818			9,018
Share-based compensation		21,826			19,913
Provision for inventory valuation		5,925			6,111
Deferred income taxes		(15,951	)		(21,193	)
Other, net		(97	)		3,005
Changes in operating assets and liabilities		(25,035	)		(38,790	)
Net cash and cash equivalents provided by operating activities		189,677			110,387
Cash flows from investing activities:
Purchases of marketable securities		(538,132	)		(360,273	)
Proceeds from maturities and sales of marketable securities		342,958			314,124
Purchases of property, plant and equipment		(27,277	)		(20,110	)
Net cash and cash equivalents used in investing activities		(222,451	)		(66,259	)
Cash flows from financing activities:
Purchases and retirement of common stock		—			(3,197	)
Tax payments related to shares withheld for share-based compensation plans		(18,441	)		(10,367	)
Payment of contingent consideration for acquired business		(737	)		(803	)
Issuance of shares through share-based compensation plans		9,178			5,285
Net cash and cash equivalents used in financing activities		(10,000	)		(9,082	)
Effect of exchange rate changes on cash and cash equivalents		(1,996	)		(4,333	)
Net (decrease) increase in cash and cash equivalents		(44,770	)		30,713
Cash and cash equivalents at beginning of period		233,508			175,872
Cash and cash equivalents at end of period	$	188,738		$	206,585

Supplemental disclosure of cash flow information:
Income taxes paid (net of refunds)	$	30,232		$	28,935

The accompanying notes are an integral part of these financial statements.

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ONTO INNOVATION INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(In thousands)

(Unaudited)


	Common Stock					Additional Paid-in			Accumulated Other Comprehensive			Accumulated
	Shares			Amount		Capital			Loss			Earnings		Total
Balance at December 30, 2023		49,086		$	49	$	1,262,029		$	(7,899	)	$	482,356	$	1,736,535
Net income		—			—		—			—			46,853		46,853
Share-based compensation		—			—		6,486			—			—		6,486
Issuance of shares through share-based compensation plans, net		169			—		4,015			—			—		4,015
Share-based compensation plan withholdings		(53	)		—		(9,088	)		—			—		(9,088	)
Currency translation		—			—		—			(2,593	)		—		(2,593	)
Unrealized loss on investments		—			—		—			(657	)		—		(657	)
Balance at March 30, 2024		49,202		$	49	$	1,263,442		$	(11,149	)	$	529,209	$	1,781,551
Net income		—			—		—			—			52,949		52,949
Share-based compensation		—			—		8,244			—			—		8,244
Issuance of shares through share-based compensation plans, net		181			—		—			—			—		—
Share-based compensation plan withholdings		(44	)		—		(8,871	)		—			—		(8,871	)
Currency translation		—			—		—			(1,996	)		—		(1,996	)
Unrealized loss on investments		—			—		—			(201	)		—		(201	)
Balance at June 29, 2024		49,339		$	49	$	1,262,815		$	(13,346	)	$	582,158	$	1,831,676
Net income		—			—		—			—			53,051		53,051
Share-based compensation		—			—		7,096			—			—		7,096
Issuance of shares through share-based compensation plans, net		53			—		5,163			—			—		5,163
Share-based compensation plan withholdings		(2	)		—		(482	)		—			—		(482	)
Currency translation		—			—		—			4,859			—		4,859
Unrealized gain on investments		—			—		—			2,162			—		2,162
Balance at September 28, 2024		49,390		$	49	$	1,274,592		$	(6,325	)	$	635,209	$	1,903,525

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	Common Stock					Additional Paid-in			Accumulated Other Comprehensive			Accumulated
	Shares			Amount		Capital			Loss			Earnings			Total
Balance at December 31, 2022		48,684		$	49	$	1,243,631		$	(10,010	)	$	362,756		$	1,596,426
Net income		—			—		—			—			29,068			29,068
Share-based compensation		—			—		6,119			—			—			6,119
Issuance of shares through share-based compensation plans, net		225			—		—			—			—			—
Purchases of common stock		(46	)		—		(1,638	)		—			(1,559	)		(3,197	)
Share-based compensation plan withholdings		(62	)		—		(6,273	)		—			—			(6,273	)
Currency translation		—			—		—			1,090			—			1,090
Unrealized gain on investments		—			—		—			1,392			—			1,392
Balance at April 1, 2023		48,801		$	49	$	1,241,839		$	(7,528	)	$	390,265		$	1,624,625
Net income		—			—		—			—			25,896			25,896
Share-based compensation		—			—		7,745			—			—			7,745
Issuance of shares through share-based compensation plans, net		227			—		5,285			—			—			5,285
Share-based compensation plan withholdings		(56	)		—		(3,676	)		—			—			(3,676	)
Currency translation		—			—		—			(2,998	)		—			(2,998	)
Unrealized loss on investments		—			—		—			(163	)		—			(163	)
Balance at July 1, 2023		48,972		$	49	$	1,251,193		$	(10,689	)	$	416,161		$	1,656,714
Net income		—			—		—			—			35,886			35,886
Share-based compensation		—			—		6,049			—			—			6,049
Issuance of shares through share-based compensation plans, net		109			—		—			—			—			—
Purchases and retirement of common stock		—			—		—			—			—			—
Share-based compensation plan withholdings		(3	)		—		(418	)		—			—			(418	)
Currency translation		—			—		—			(2,761	)		—			(2,761	)
Unrealized loss on investments		—			—		—			672			—			672
Balance at September 30, 2023		49,078		$	49	$	1,256,824		$	(12,778	)	$	452,047		$	1,696,142

The accompanying notes are an integral part of these financial statements.

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ONTO INNOVATION INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except per share data and percentages)

(Unaudited)

NOTE 1. Basis of Presentation

The accompanying interim unaudited Condensed Consolidated Financial Statements have been prepared by Onto Innovation Inc. (together with its consolidated subsidiaries, unless otherwise specified or suggested by the context, the “Company,” “Onto Innovation,” “we,” “our” or “us”) and in the opinion of management reflect all adjustments, consisting of normal recurring accruals, necessary for their fair presentation in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). Preparing financial statements requires management to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Actual amounts could differ materially from reported amounts. The interim results for the three and nine months ended September 28, 2024 are not necessarily indicative of results to be expected for the entire year or any future periods. This interim financial information should be read in conjunction with the financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 30, 2023 (the “2023 Form 10-K”) filed with the Securities and Exchange Commission on February 26, 2024. The accompanying Condensed Consolidated Balance Sheet at December 30, 2023 has been derived from the audited consolidated financial statements included in the 2023 Form 10-K.

The Company operates on a 52- or 53-week fiscal year ending on the Saturday closest to December 31. Our fiscal year ending December 28, 2024 (“fiscal year 2024”) is a 52-week fiscal year. The first quarter of the Company’s fiscal year 2024 ended on March 30, 2024, the second quarter ended on June 29, 2024 and the third quarter ended on September 28, 2024. Our fiscal year ended December 30, 2023 was a 52-week fiscal year. The third quarter of the fiscal year ended December 30, 2023 ended on September 30, 2023.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Estimates made by management include excess and obsolete inventory, fair value of assets acquired and liabilities assumed in a business combination, recoverability and useful lives of property, plant and equipment and identifiable intangible assets, recoverability of goodwill, recoverability of deferred tax assets, allowance for credit losses, liabilities for product warranty, share-based payments and liabilities for tax uncertainties. Actual results could differ from those estimates.

These estimates and assumptions are based on historical experience and on various other factors which the Company believes to be reasonable under the circumstances. The Company may engage third-party valuation specialists to assist with estimates related to the valuation of financial instruments, assets and stock awards associated with various contractual arrangements. Such estimates often require the selection of appropriate valuation methodologies and significant judgment. Actual results could differ from these estimates under different assumptions or circumstances and such differences could be material.

Adoption of Accounting Standards

Recently Adopted or Effective

There have been no recent accounting pronouncements or changes in accounting pronouncements during the three and nine months ended September 28, 2024, as compared to the recent accounting pronouncements described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 30, 2023, that are of significance, or potential significance, to the Company.

Updates Not Yet Effective

In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures,” which expands disclosures about a public entity’s reportable segments and requires more enhanced information about a reportable segment including information

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about the reportable segment’s expenses, interim segment profit or loss, and how a public entity’s chief operating decision maker uses reported segment profit or loss information in assessing segment performance and allocating resources. The guidance is effective for financial statements issued for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The Company is required to adopt this standard in fiscal year 2024 for the annual reporting period ending December 28, 2024, with retrospective disclosure of prior periods presented. The Company expects there will be no material impact on its Consolidated Financial Statements from the adoption of ASU 2023-07.

In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” which requires public entities to disclose consistent categories and greater disaggregation of information in the rate reconciliation and for income taxes paid. It also includes certain other amendments to improve the effectiveness of income tax disclosures. The guidance is effective for financial statements issued for annual periods beginning after December 15, 2024, with early adoption permitted. The Company is required to adopt this standard prospectively in fiscal year 2025 for the annual reporting period ending December 27, 2025. The Company is currently in the process of evaluating the impact of adoption on its Consolidated Financial Statements.

NOTE 2. Fair Value Measurements

Fair Value of Financial Instruments

The Company has evaluated the estimated fair value of financial instruments using available market information and valuations as provided by third-party sources. The use of different market assumptions and/or estimation methodologies could have a significant effect on the estimated fair value amounts. The carrying value of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximates fair value because of the short-term maturity of these instruments.

Fair Value Hierarchy

The Company applies a three-level valuation hierarchy for fair value measurements. This hierarchy prioritizes the inputs into three broad levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the asset or liability. Level 3 inputs are unobservable inputs based on management’s assumptions used to measure assets and liabilities at fair value. A financial asset’s or liability’s fair value measurement classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

The following tables provide the assets and liabilities carried at fair value measured on a recurring basis at September 28, 2024 and December 30, 2023:


	Fair Value Measurements Using Significant Other Observable Inputs (Level 2)
	September 28, 2024		December 30, 2023
Assets:
Available-for-sale debt securities:
Government notes and bonds	$	287,509	$	195,800
Certificates of deposit		75,435		67,467
Commercial paper		157,915		99,635
Corporate bonds		145,807		101,401
Total assets	$	666,666	$	464,303
Liabilities:
Foreign currency forward contracts	$	605	$	1,370
Total liabilities	$	605	$	1,370

Available-for-sale debt securities classified as Level 2 are valued using observable inputs to quoted market prices, benchmark yields, reported trades, broker/dealer quotes or alternative pricing sources with reasonable levels of price transparency. The foreign currency forward contracts are primarily measured based on the foreign currency spot and forward

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rates quoted by the banks or foreign currency dealers. Investment prices are obtained from third-party pricing providers, which model prices utilizing the above observable inputs, for each asset class.

See Note 3 for additional discussion regarding the fair value of the Company’s marketable securities.

NOTE 3. Marketable Securities

At September 28, 2024 and December 30, 2023, marketable securities are categorized as follows:


	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
September 28, 2024
Government notes and bonds	$	286,447	$	1,064	$	2	$	287,509
Certificates of deposit		75,320		115		—		75,435
Commercial paper		157,641		278		4		157,915
Corporate bonds		145,028		788		9		145,807
Total marketable securities	$	664,436	$	2,245	$	15	$	666,666
December 30, 2023
Government notes and bonds	$	195,733	$	393	$	326	$	195,800
Certificates of deposit		67,377		93		3		67,467
Commercial paper		99,591		54		10		99,635
Corporate bonds		101,146		391		136		101,401
Total marketable securities	$	463,847	$	931	$	475	$	464,303

The amortized cost and estimated fair value of marketable securities classified by the maturity date listed on the security, regardless of the Condensed Consolidated Balance Sheets classification, is as follows at September 28, 2024 and December 30, 2023:


	September 28, 2024				December 30, 2023
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	481,132	$	482,238	$	331,136	$	330,937
Due after one through five years		135,329		136,453		132,711		133,366
Due after five through ten years		235		235		—		—
Due after ten years		47,740		47,740		—		—
Total marketable securities	$	664,436	$	666,666	$	463,847	$	464,303

The Company has evaluated its investment policies and determined that all of its marketable securities, which are comprised of debt securities, are to be classified as available-for-sale. The Company’s available-for-sale debt securities are carried at fair value, with the unrealized gains and losses reported in Stockholders’ equity under the caption “Accumulated other comprehensive loss.” Gross realized gains and losses on available-for-sale securities are included in “Other (expense) income, net” on the Condensed Consolidated Statements of Operations and were not material during the three and nine months ended September 28, 2024 and September 30, 2023. The Company records credit losses for its available-for-sale debt securities when it intends to sell the securities, it is more-likely-than not that it will be required to sell the securities before a recovery, or when it does not expect to recover the entire amortized cost basis of the securities. The cost of securities sold is based on the specific identification method.

The Company has determined that the gross unrealized losses on its marketable securities at September 28, 2024 and December 30, 2023 are temporary in nature. The Company regularly reviews its investment portfolio to identify and evaluate marketable securities that have indications of possible impairment from credit losses or other factors. Factors considered in determining whether an unrealized loss is considered to be a credit loss include the length of time and extent to which fair value has been less than the cost basis, credit quality and the Company’s ability and intent to hold the securities for a period of time sufficient to allow for any anticipated recovery in market value.

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The following table summarizes the estimated fair value and gross unrealized holding losses of marketable securities, aggregated by investment instrument and period of time in an unrealized loss position, at September 28, 2024 and December 30, 2023:


	In Unrealized Loss Position For Less Than 12 Months				In Unrealized Loss Position For Greater Than 12 Months
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
September 28, 2024
Government notes and bonds	$	12,439	$	1	$	1,996	$	1
Certificates of deposit		4,360		—		—		—
Commercial paper		20,624		4		—		—
Corporate bonds		16,930		7		6,700		2
Total	$	54,353	$	12	$	8,696	$	3
December 30, 2023
Government notes and bonds	$	82,776	$	325	$	180	$	1
Certificates of deposit		11,839		3		—		—
Commercial paper		20,121		10		—		—
Corporate bonds		20,268		103		5,999		33
Total	$	135,004	$	441	$	6,179	$	34

See Note 2 for additional discussion regarding the fair value of the Company’s marketable securities.

NOTE 4. Derivative Instruments and Hedging Activities

The Company, when it considers it to be appropriate, enters into forward contracts to hedge the economic exposures arising from foreign currency denominated transactions. At September 28, 2024 and December 30, 2023, these contracts were denominated in euro, Chinese renminbi, Japanese yen, Korean won, Singapore dollars, and Taiwanese dollars. Foreign currency forward contracts are not designated as hedges for accounting purposes, and therefore, the change in fair value is recorded in “Other (expense) income, net,” in the Condensed Consolidated Statements of Operations. The Company records its forward contracts at fair value in either “Prepaid expenses and other current assets” or “Other current liabilities” in the Condensed Consolidated Balance Sheets.

The dollar equivalent of the U.S. dollar forward contracts and related fair values as of September 28, 2024 and December 30, 2023 were as follows:


	September 28, 2024			December 30, 2023
Notional amount	$	53,614		$	51,551
Fair value of liability	$	(605	)	$	(1,370	)

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NOTE 5. Purchased Intangible Assets

Intangible Assets

Purchased intangible assets as of September 28, 2024 and December 30, 2023 are as follows:


	Gross Carrying Amount		Accumulated Amortization		Net
September 28, 2024
Finite-lived intangibles:
Developed technology	$	378,246	$	289,357	$	88,889
Customer and distributor relationships		73,321		38,223		35,098
Trademarks and trade names		14,171		10,072		4,099
Total identifiable intangible assets	$	465,738	$	337,652	$	128,086
December 30, 2023
Finite-lived intangibles:
Developed technology	$	378,197	$	254,350	$	123,847
Customer and distributor relationships		73,321		34,782		38,539
Trademarks and trade names		14,171		9,182		4,989
Total identifiable intangible assets	$	465,689	$	298,314	$	167,375

Assuming no change in the gross carrying value of identifiable intangible assets and estimated lives, future estimated amortization expenses are:


	Expected Amortization
Fiscal Year:	Expense
2024 (remainder)	$	9,849
2025		32,587
2026		31,394
2027		23,173
2028		12,288
2029		5,038
Thereafter		13,757
Total	$	128,086

NOTE 6. Balance Sheet Components

Inventories

Inventories, net are comprised of the following:


	September 28, 2024		December 30, 2023
Materials	$	202,934	$	234,471
Work-in-process		81,845		67,816
Finished goods		23,525		25,486
Total inventories, net	$	308,304	$	327,773

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Property, Plant and Equipment

Property, plant and equipment, net is comprised of the following:


	September 28, 2024			December 30, 2023
Machinery and equipment	$	83,006		$	69,828
Land and building		46,583			47,889
Computer equipment and software		30,348			17,790
Leasehold improvements		23,902			22,089
Furniture and fixtures		3,985			3,921
		187,824			161,517
Accumulated depreciation		(67,734	)		(57,906	)
Total property, plant and equipment, net	$	120,090		$	103,611

Other assets

Other assets are comprised of the following:


	September 28, 2024		December 30, 2023
Operating lease right-of-use assets	$	15,021	$	18,360
Other		1,649		2,452
Total other assets	$	16,670	$	20,812

Accrued liabilities

Accrued liabilities are comprised of the following:


	September 28, 2024		December 30, 2023
Payroll and related expenses	$	34,050	$	33,052
Warranty		9,483		8,934
Other		57		76
Total accrued liabilities	$	43,590	$	42,062

Other current liabilities

Other current liabilities are comprised of the following:


	September 28, 2024		December 30, 2023
Customer deposits	$	5,951	$	9,972
Current operating lease obligations		5,458		5,494
Income tax payable		4,463		3,210
Accrued professional fees		815		1,751
Other accrued taxes		6,096		3,570
Other		3,608		7,035
Total other current liabilities	$	26,391	$	31,032

Other non-current liabilities

Other non-current liabilities are comprised of the following:


	September 28, 2024		December 30, 2023
Non-current operating lease obligations	$	10,940	$	14,027
Unrecognized tax benefits (including interest)		8,839		7,358
Deferred revenue		3,197		2,462
Other		2,128		1,604
Total other non-current liabilities	$	25,104	$	25,451

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NOTE 7. Commitments and Contingencies

Intellectual Property Indemnification Obligations

The Company has entered into agreements with customers that include limited intellectual property indemnification obligations that are customary in the industry. These guarantees generally require the Company to compensate the other party for certain damages and costs incurred as a result of third-party intellectual property claims arising from these transactions. The nature of the intellectual property indemnification obligations prevents the Company from making a reasonable estimate of the maximum potential amount it could be required to pay to its customers. Historically, the Company has not made any indemnification payments under such agreements and no amount has been accrued in the accompanying Condensed Consolidated Financial Statements with respect to these indemnification guarantees.

Warranty Reserves

The Company generally provides a warranty on its products for a period of 12 to 14 months against defects in material and workmanship. The Company estimates the costs that may be incurred during the warranty period and records a liability in the amount of such costs at the time revenue is recognized. The Company’s estimate is based primarily on historical experience. The Company periodically assesses the adequacy of its recorded warranty liabilities and adjusts the amounts as necessary. Warranty provisions are generally related to current period sales. Settlements of warranty reserves are generally associated with sales that occurred during the 12 to 14 months prior to the period-end.

Changes in the Company’s warranty reserves are as follows:


	Nine Months Ended
	September 28,			September 30,
	2024			2023
Balance, beginning of the period	$	9,380		$	11,830
Accruals		8,756			6,670
Usage		(7,998	)		(9,311	)
Balance, end of the period	$	10,138		$	9,189

Warranty reserves are reported in the Condensed Consolidated Balance Sheets under the captions “Accrued liabilities” and “Other non-current liabilities.”

Legal Matters

From time to time, the Company is subject to legal proceedings and claims in the ordinary course of business. In the opinion of management, any potential liabilities resulting from any current disputes would not have a material adverse effect on the Company’s unaudited interim condensed consolidated financial statements.

Line of Credit

The Company has a credit agreement with a bank that provides for a variable-rate line of credit which is secured by the marketable securities the Company has with the bank. The Company is permitted to borrow up to 70% of the value of eligible securities held at the time the line of credit is accessed, up to a maximum of $100 million. The available line of credit as of September 28, 2024 was $100 million with an available interest rate of 6.6%. The credit agreement is available to the Company until such time that either party terminates the arrangement at their discretion. The Company has not utilized the line of credit as of the date of this filing.

NOTE 8. Revenue

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The following table represents a disaggregation of revenue by timing of revenue:


	Three Months Ended				Nine Months Ended
	September 28,		September 30,		September 28,		September 30,
	2024		2023		2024		2023
Point-in-time	$	237,935	$	194,375	$	679,517	$	559,074
Over-time		14,275		12,810		43,865		37,938
Total revenue	$	252,210	$	207,185	$	723,382	$	597,012

See Note 14 for additional discussion of the Company’s disaggregated revenue in detail.

Contract Liabilities

The Company records contract liabilities when the customer has been billed in advance of the Company completing its performance obligations primarily with respect to liabilities related to service contracts and installation. For contracts that have a duration of one year or less, these amounts are recorded as current deferred revenue in the Condensed Consolidated Balance Sheets. For contracts with a duration longer than one year, these amounts are recorded in other non-current liabilities in the Condensed Consolidated Balance Sheets. As of September 28, 2024 and December 30, 2023, the Company carried a long-term deferred revenue balance of $3,197 and $2,462, respectively.

Changes in deferred revenue were as follows:


	Three Months Ended						Nine Months Ended
	September 28,			September 30,			September 28,			September 30,
	2024			2023			2024			2023
Balance, beginning of the period	$	31,281		$	27,256		$	27,225		$	33,014
Deferral of revenue		15,926			17,749			50,601			52,039
Recognition of current year deferred revenue		(13,173	)		(13,407	)		(33,416	)		(36,542	)
Recognition of prior period deferred revenue		(4,068	)		(4,867	)		(14,444	)		(21,780	)
Balance, end of the period	$	29,966		$	26,731		$	29,966		$	26,731

NOTE 9. Share-Based Compensation

Restricted Stock Unit Activity

A summary of the Company’s restricted stock unit activity with respect to the nine months ended September 28, 2024 is as follows:


	Number of Shares			Weighted Average Grant Date Fair Value
Nonvested at December 30, 2023		584		$	85.41
Granted		163		$	192.34
Vested		(320	)	$	81.12
Forfeited		(13	)	$	98.60
Nonvested at September 28, 2024		414		$	130.34

Of the 414 nonvested shares outstanding at September 28, 2024, 332 are service-based RSUs and 82 are market-based PRSUs. The fair value of the Company’s service-based RSUs was calculated based on the fair market value of the Company’s stock at the date of grant. The fair value of the Company’s market-based PRSUs granted during fiscal years 2024 and 2023 was calculated using a Monte Carlo simulation model at the date of the grant, resulting in a weighted average grant-date fair value per share of $251.51 and $100.79, respectively.

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As of September 28, 2024 and December 30, 2023, there was $34,231 and $26,559 of total unrecognized compensation cost related to restricted stock units granted under the Company’s stock plans, respectively. That cost is expected to be recognized over a weighted average period of 1.4 years following both September 28, 2024 and December 30, 2023, respectively.

NOTE 10. Other (Expense) Income, Net

Other (expense) income, net, is comprised of the following:


	Three Months Ended						Nine Months Ended
	September 28,			September 30,			September 28,			September 30,
	2024			2023			2024			2023
Foreign currency exchange losses, net	$	(704	)	$	(1,009	)	$	(115	)	$	(3,116	)
Other		(20	)		8			125			124
Total other (expense) income, net	$	(724	)	$	(1,001	)	$	10		$	(2,992	)

NOTE 11. Income Taxes

The following table provides details of income taxes:


	Three Months Ended						Nine Months Ended
	September 28,			September 30,			September 28,			September 30,
	2024			2023			2024			2023
Income before income taxes	$	61,015		$	38,699		$	169,176		$	98,756
Provision for income taxes	$	7,964		$	2,813		$	16,323		$	7,906
Effective tax rate		13	%		7	%		10	%		8	%

The income tax provision for the three and nine months ended September 28, 2024 was computed based on the Company’s annual forecast of profit by jurisdiction and forecasted effective tax rate for the year. The increase in the Company’s income tax provision for the three and nine months ended September 28, 2024 as compared to the three and nine months ended September 30, 2023 was primarily due, in each case, to an increase in quarterly earnings, partially offset by an increase in the excess benefits associated with equity compensation. The Company’s recorded effective tax rate for the periods presented is less than the U.S. statutory rate primarily due to projected Foreign Derived Intangible Income deductions, federal research and development tax credits, and excess tax benefits associated with equity compensation.

The Company currently has a partial valuation allowance recorded against certain foreign and state net operating loss and credit carryforwards where the unrealizability of such deferred tax assets is more likely than not. Each quarter, the Company assesses the likelihood that it will be able to recover its deferred tax assets. The Company considers available evidence, both positive and negative, including forecasted earnings, in assessing its need for a valuation allowance. As a result of the Company’s analysis, it concluded that it is more likely than not that a portion of its deferred tax assets will not be realized. Therefore, the Company continues to provide a valuation allowance against certain deferred tax assets. The Company continues to monitor available evidence and may reverse some or all of its remaining valuation allowance in future periods, if appropriate. The Company has a recorded valuation allowance against a certain portion of its deferred tax assets of $13,960 at September 28, 2024 and December 30, 2023.

The Organization for Economic Co-operation and Development (“OECD”) has been working on a Base Erosion and Profits Shifting (“BEPS”) project that would change various aspects of the existing framework under which the Company’s tax obligations are determined in many of the countries in which we operate. As part of the BEPS project, the OECD issued policies aimed to modernize global tax systems, including a country-by-country 15% minimum effective tax rate (“Pillar Two”) for multinational companies. Numerous countries have enacted, or are in the process of enacting, legislation to implement the Pillar Two model rules with a subset of the rules becoming effective during the current year, and the remaining rules becoming effective in later periods. At this point in time, the Company does not expect any material tax impact associated with Pillar Two rules in the countries where it operates. As these rules continue to evolve with new legislation and guidance, the Company will continue to monitor and account for the enactment of Pillar Two and the potential impacts such rules may have on its effective tax rate and cash flows in future years.

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NOTE 12. Earnings Per Share

Basic earnings per share is calculated using the weighted average number of shares of common stock outstanding during the period. Restricted stock units, employee stock purchase grants and stock options are included in the calculation of diluted earnings per share, except when their effect would be anti-dilutive.

The Company’s basic and diluted earnings per share amounts are as follows:


	Three Months Ended				Nine Months Ended
	September 28,		September 30,		September 28,		September 30,
	2024		2023		2024		2023
Numerator:
Net income	$	53,051	$	35,886	$	152,853	$	90,850
Denominator:
Basic earnings per share - weighted average shares outstanding		49,426		49,043		49,333		48,933
Effect of potential dilutive securities:
Restricted stock units and employee stock purchase grants - dilutive shares		268		358		336		326
Diluted earnings per share - weighted average shares outstanding		49,694		49,401		49,669		49,259
Earnings per share:
Basic	$	1.07	$	0.73	$	3.10	$	1.86
Diluted	$	1.07	$	0.73	$	3.08	$	1.84

NOTE 13. Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss, net of tax, were as follows:


	Foreign currency translation adjustments			Net unrealized gains on available-for-sale marketable securities			Accumulated other comprehensive loss
Balance at December 30, 2023	$	(8,664	)	$	765		$	(7,899	)
Net current period other comprehensive income		270			1,304			1,574
Balance at September 28, 2024	$	(8,394	)	$	2,069		$	(6,325	)

	Foreign currency translation adjustments			Net unrealized (losses) gains on available-for-sale marketable securities			Accumulated other comprehensive loss
Balance at December 31, 2022	$	(7,115	)	$	(2,895	)	$	(10,010	)
Net current period other comprehensive (loss) income		(4,669	)		1,901			(2,768	)
Balance at September 30, 2023	$	(11,784	)	$	(994	)	$	(12,778	)

For the nine months ended September 28, 2024 and September 30, 2023, tax effects on net income of amounts recorded in other comprehensive income (loss) were $358 and $407, respectively.

NOTE 14. Segment Reporting and Geographic Information

The Company is engaged in the design, development, manufacture and support of high-performance control metrology, defect inspection, lithography and data analysis systems used by microelectronics device manufacturers. The Company and its subsidiaries currently operate in a single operating segment: the design, development, manufacture and support of high-performance process control defect inspection and metrology, lithography and process control software systems used by microelectronics device manufacturers. Therefore, the Company has one reportable segment. The Company’s chief operating

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decision maker is the Chief Executive Officer (the “CEO”). The CEO allocates resources and assesses performance of the business and other activities at the reportable segment level.

The following table lists the different sources of revenue:


	Three Months Ended								Nine Months Ended
	September 28,				September 30,				September 28,				September 30,
	2024				2023				2024				2023
Systems and software	$	217,135	86	%	$	169,346	82	%	$	622,400	86	%	$	495,523	83	%
Parts		19,995	8	%		20,100	10	%		56,890	8	%		58,665	10	%
Services		15,080	6	%		17,739	8	%		44,092	6	%		42,824	7	%
Total revenue	$	252,210	100	%	$	207,185	100	%	$	723,382	100	%	$	597,012	100	%

The Company’s significant operations outside the United States include sales, service and application offices in Asia and Europe. For geographical revenue reporting, revenue is attributed to the geographic location to which the product is shipped. Revenue by geographic region is as follows:


	Three Months Ended				Nine Months Ended
	September 28,		September 30,		September 28,		September 30,
	2024		2023		2024		2023
Revenue from third parties:
South Korea	$	77,014	$	38,892	$	227,958	$	122,205
Taiwan		78,273		28,084		209,006		85,802
China		32,112		29,785		86,222		108,294
United States		21,979		29,805		61,763		103,756
Southeast Asia		15,589		25,060		55,796		68,040
Japan		12,559		32,597		45,172		60,832
Europe		14,684		22,962		37,465		48,083
Total revenue	$	252,210	$	207,185	$	723,382	$	597,012

The following customers accounted for 10% or more of total revenue for the indicated periods:


	Nine Months Ended
	September 28,			September 30,
	2024			2023
Customer A		20	%		11	%
Customer B		19	%		20	%
Customer C		13	%	^
^ The customer accounted for less than 10% of total revenue during the period.

Three customers’ net accounts receivable balances, were individually greater than 10% of net accounts receivable at September 28, 2024, representing, in the aggregate approximately 43% of the Company’s total net accounts receivable.

Two customers’ net accounts receivable balances, were individually greater than 10% of net accounts receivable at December 30, 2023, representing, in the aggregate approximately 29% of the Company’s total net accounts receivable.

Substantially all of the Company’s long-lived assets are located within the United States of America.

NOTE 15. Share Repurchase Authorization

In February 2024, the Onto Innovation Board of Directors approved a new share repurchase authorization, which allows the Company to repurchase up to $200 million worth of shares of its common stock. Repurchases may be made through both public market and private transactions from time to time. Any amount paid to repurchase the shares in excess of par value, including transaction costs, would be recorded directly as a decrease to additional paid-in capital and accumulated earnings. During the three and nine months ended September 28, 2024, no shares of the Company’s common stock were repurchased under the share repurchase authorization. At September 28, 2024, there was $200 million available for future share repurchases under this share repurchase authorization.

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NOTE 16. Restructuring

From time to time, the Company approves restructuring plans, which include workforce reductions, to streamline operations and align the Company’s cost structure with its business outlook. These restructuring plans may result in charges to cost of goods sold for streamlining of certain manufacturing activities or for inventory write-downs primarily related to the exit of older product lines. Charges to operating expenses primarily include employee severance costs that are paid during the period incurred and charges for streamlining of certain operating activities.

Restructuring expenses recorded in the Condensed Consolidated Statements of Operations are as follows:


	Three Months Ended				Nine Months Ended
	September 28,		September 30,		September 28,		September 30,
	2024		2023		2024		2023
Cost of goods sold	$	1,084	$	—	$	2,575	$	2,279
Operating expenses		2,167		—		3,046		3,226
Total restructuring expenses	$	3,251	$	—	$	5,621	$	5,505

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

Forward-Looking Statements

Certain statements in this Form 10-Q, or incorporated by reference in this Form 10-Q, of Onto Innovation Inc. (referred to in this Form 10-Q, together with its consolidated subsidiaries, unless otherwise specified or suggested by the context, as the “Company,” “Onto Innovation,” “we,” “our” or “us”) may be considered “forward-looking statements” or may be based on “forward-looking statements,” including, but not limited to, those concerning:

•

our business momentum and future growth;

•

technology development, product introduction and acceptance of our products and services;

•

our manufacturing practices and ability to deliver both products and services consistent with our customers’ demands and expectations and to strengthen our market position, including our ability to source components, materials, and equipment due to supply chain delays or shortages;

•

our expectations of the semiconductor market outlook;

•

future revenue, gross profits, research and development and engineering expenses, selling, general and administrative expenses, and cash requirements;

•

the effects of political, economic, legal, and regulatory changes or conflicts on our global operations;

•

the effects of natural disasters or public health emergencies on the global economy and on our customers, suppliers, employees, and business;

•

our dependence on certain significant customers and anticipated trends and developments in and management plans for our business and the markets in which we operate; and

•

our ability to be successful in managing our cost structure and cash expenditures and results of litigation.

Statements contained or incorporated by reference in this Form 10-Q that are not purely historical are forward-looking statements and are subject to safe harbors under Section 27A of the Securities Act of 1933, as amended, Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the Private Securities Litigation Reform Act of 1995. Forward-looking statements may be identified by words such as, but not limited to, “anticipate,” “believe,” “continue,” “estimate,” “expect,” “intend,” “plan,” “should,” “may,” “could,” “will,” “would,” “forecast,” “project” and words or phrases of similar meaning, as they relate to our management or us.

Forward-looking statements contained herein reflect our current expectations, assumptions and projections with respect to future events and are subject to certain risks, uncertainties and assumptions, including, but not limited to, those identified in Part II, Item 1A. “Risk Factors” and elsewhere in this Form 10-Q. Actual results may differ materially and adversely from those included in such forward-looking statements. Forward-looking statements reflect our position as of the date of this Form 10-Q

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and we undertake no obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Critical Accounting Estimates

The preparation of condensed consolidated financial statements and related disclosures in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) requires management to make judgments, assumptions and estimates that affect the amounts reported.

Estimates and assumptions about future events and their effects cannot be determined with certainty. We base our estimates on historical experience and on various other assumptions believed to be applicable and reasonable under the circumstances. These estimates may change as new events occur, as additional information is obtained and as our operating environment changes. In addition, management is periodically faced with uncertainties, the outcomes of which are not within our control and will not be known for prolonged periods of time. Certain of these uncertainties are discussed in our Annual Report on Form 10-K for the fiscal year ended December 30, 2023 (the “2023 Form 10-K”) filed with the Securities and Exchange Commission (the “SEC”) on February 26, 2024 in the Items entitled “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” There have been no material changes in our critical accounting estimates from the information presented in Part II, Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in the 2023 Form 10-K.

For more information, please see our critical accounting estimates as previously disclosed in the 2023 Form 10-K and recent accounting pronouncements discussed in Note 1 to the Condensed Consolidated Financial Statements.

Executive Summary

We are a worldwide leader in the design, development, manufacture and support of metrology and inspection tools for the semiconductor industry, including process control tools that perform optical metrology on patterned and unpatterned wafers, wafer macro-defect inspection, including macro-inspection of both 2D and 3D wafer features, wafer substrate and panel substrate lithography systems, and process control analytical software. Our products are primarily used by silicon wafer manufacturers, semiconductor integrated circuit fabricators, and advanced packaging manufacturers operating in the semiconductor market. Our products are also used for process control in a number of other specialty device manufacturing markets, including light emitting diodes (“LED”), vertical-cavity surface-emitting lasers (“VCSEL”), micro-electromechanical systems (“MEMS”), CMOS image sensors (“CIS”), silicon and compound semiconductor (SiC and GaN) power devices, analog devices, RF filters, data storage, and certain industrial and scientific applications.

We provide process and yield management solutions used in bare silicon wafer production and wafer processing facilities, often referred to as “front-end” manufacturing, and advanced packaging of chips and test facilities, or “back-end” manufacturing, through a portfolio of standalone systems for optical metrology, macro-defect inspection, packaging lithography, as well as transparent and opaque thin film measurements. Our automated and integrated metrology systems measure critical dimensions, device structures, topography, shape, and various thin film compositions, including three-dimensional features and film thickness, as well as optical and material properties. Our primary areas of focus include products that provide critical yield-enhancing and actionable information, which is used by microelectronic device manufacturers to improve yield and time to market of their next-generation devices. Our systems feature sophisticated software and production-worthy automation. In addition, our advanced process control software portfolio includes powerful solutions for standalone tools, groups of tools, and factory-wide and enterprise-wide suites to enhance productivity and achieve significant cost savings. Our systems are backed by worldwide customer service and applications support.

The semiconductor and electronics industries have been characterized by constant technological innovations. We believe that, over the long term, our customers will continue to invest in advanced technologies and new materials to enable smaller design rules and higher density applications that fuel demand for process control equipment.

The following table summarizes certain key financial information for the periods indicated below (in thousands, except per share and percent data):

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	Three Months Ended
	September 28,			June 29,
	2024			2024
Revenue	$	252,210		$	242,327
Gross profit	$	136,379		$	128,236
Gross profit as a percent of revenue		54	%		53	%
Total operating expenses	$	83,307		$	79,403
Net income	$	53,051		$	52,949
Diluted earnings per share	$	1.07		$	1.07

•

In the fiscal quarter ended September 28, 2024 (the “September 2024 quarter”), revenue increased 4.1% compared to the fiscal quarter ended June 29, 2024 (the “June 2024 quarter”), primarily due to increases in sales to NAND and DRAM customers in advanced nodes applications and sales to DRAM customers in specialty devices and advanced packaging. These increases were partially offset by decline in sales to foundry customers during the September 2024 quarter.

•

Gross profit as a percentage of revenue in the September 2024 quarter increased by 1% compared to the June 2024 quarter primarily due to increased volume and change in product mix.

•

Operating expenses in the September 2024 quarter increased by 4.9% compared to the June 2024 quarter primarily due to an increase in restructuring expenses, research and development project costs, and compensation cost.

Our cash, cash equivalents and marketable securities balance increased to $855.4 million at September 28, 2024, compared to $697.8 million at December 30, 2023. This increase was primarily the result of $189.7 million of cash generated from operating activities, and $9.2 million of cash from issuance of shares through share-based compensation plans, partially offset by cash used for capital expenditures of $27.3 million and $18.4 million for tax payments related to net share settlement of employee stock-based compensation plans. Employee headcount at September 28, 2024 was approximately 1,518.

In 2022 and 2023, the United States government implemented additional export regulations for U.S. semiconductor technology sold in China. We have applied for, and in some cases received, export licenses to continue doing business with our customers that are affected by the new export rules. However, the new export controls have continued to negatively impact our net sales in China for the first, second, and third fiscal quarters of 2024.

For a discussion of the risks related to our business and operations, see Part II, Item 1A – Risk Factors of this Form 10-Q.

Results of Operations for the Three and Nine Months Ended September 28, 2024 and September 30, 2023

Revenue. Our revenue is primarily derived from the sale of our systems, software licensing, services and spare parts. Our revenue of $252.2 million increased 21.7% for the three months ended September 28, 2024 as compared to the three months ended September 30, 2023, in which revenue totaled $207.2 million. For the nine months ended September 28, 2024 and September 30, 2023, our revenue totaled $723.4 million and $597.0 million, respectively, representing a year-over-year increase of 21.2%

The following table lists, for the periods indicated, the different sources of our revenue in dollars (thousands) and as percentages of our total revenue:


	Three Months Ended								Nine Months Ended
	September 28,				September 30,				September 28,				September 30,
	2024				2023				2024				2023
Systems and software	$	217,135	86	%	$	169,346	82	%	$	622,400	86	%	$	495,523	83	%
Parts		19,995	8	%		20,100	10	%		56,890	8	%		58,665	10	%
Services		15,080	6	%		17,739	8	%		44,092	6	%		42,824	7	%
Total revenue	$	252,210	100	%	$	207,185	100	%	$	723,382	100	%	$	597,012	100	%

Total systems and software revenue increased $47.8 million and $126.9 million for the three and nine months ended September 28, 2024, respectively, as compared to the three and nine months ended September 30, 2023, respectively. The increases for the three months ended September 28, 2024 were primarily due to an increase in shipments of our inspection and metrology product lines to DRAM and NAND customers, which was partially offset by a decrease in shipments of our lithography product lines to OSAT customers. The increases for the nine months ended September 28, 2024 were primarily due to an increase

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in shipments of our inspection product lines to DRAM and foundry customers, which was partially offset by a decrease in shipments of our metrology and lithography product lines. The decrease in total parts and services revenue for the three and nine months ended September 28, 2024, as compared to the three and nine months ended September 30, 2023, was primarily due to lower demand by several of our customers, resulting in a decline in their spare parts requirements. Parts and services revenue is generated from part sales, maintenance service contracts, and system upgrades, as well as time and material billable service calls.

Gross Profit. Our gross profit has been and will likely continue to be affected by a variety of factors, including manufacturing efficiencies, provision for excess and obsolete inventory, pricing by competitors or suppliers, new product introductions, production volume, customization and reconfiguration of systems, international and domestic sales mix, system and software product mix and parts and service margins.

The following table lists, for the periods indicated, our gross profit in dollars (thousands) and as percentages of our total revenue:


	Three Months Ended						Nine Months Ended
	September 28,			September 30,			September 28,			September 30,
	2024			2023			2024			2023
Gross profit	$	136,379		$	106,852		$	382,900		$	312,288
Gross profit as a percentage of revenue		54.1	%		51.6	%		52.9	%		52.3	%

The increase in gross profit as a percentage of revenue for the three and nine months ended September 28, 2024 as compared to the three and nine months ended September 30, 2023 was primarily due to increased volume and change in product mix.

Operating Expenses.

Our operating expenses consist of:

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Research and Development. We believe that it is critical to continue to make substantial investments in research and development to ensure the availability of innovative technology that meets the current and projected requirements of our customers’ most advanced designs. We have maintained and intend to continue our commitment to investing in research and development in order to continue to offer new products and technologies. Accordingly, we devote a significant portion of our technical, management and financial resources to research and development programs. Research and development expenditures consist primarily of salaries and related expenses of employees engaged in research, design and development activities. They also include consulting fees, the cost of related supplies and legal costs to defend our patents. Our research and development expenses were $28.3 million and $81.9 million for the three and nine month periods ended September 28, 2024, respectively, as compared to $26.1 million and $80.4 million for the three and nine month periods ended September 30, 2023, respectively. The increase in research and development expenses of $2.2 million for the three month period ended September 28, 2024, as compared to the three month period ended September 30, 2023 was primarily due to increases in compensation costs of $1.7 million, product development costs of $0.2 million, travel costs of $0.2 million and depreciation and amortization costs of $0.1 million. The increase in research and development expenses of $1.5 million for the nine month period ended September 28, 2024, as compared to the nine month period ended September 30, 2023, was primarily due to increases in compensation costs of $0.7 million, travel costs of $0.5 million and outside service costs of $0.3 million.

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Sales and Marketing. Sales and marketing expenses are primarily comprised of salaries, commissions and related costs for sales and marketing personnel, as well as other non-personnel related expenses. Our sales and marketing expenses were $19.5 million and $56.7 million for the three and nine month periods ended September 28, 2024, respectively, compared to $14.8 million and $46.4 million for the three and nine month periods ended September 30, 2023, respectively. The increase in sales and marketing expenses of $4.7 million for the three month period ended September 28, 2024, as compared to the three month period ended September 30, 2023, was primarily due to increases in compensations costs of $4.3 million, travel costs of $0.3 million and freight and duty costs of $0.1 million. The increase in sales and marketing expenses of $10.3 million for the nine month period ended September 28, 2024, as compared to the nine month period ended September 30, 2023, was primarily due to increases in compensations costs of $9.4 million, travel costs of $0.4 million, sales and marketing costs of $0.3 million, outside services costs of $0.1 million and freight and duty costs of $0.1 million.

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General and Administrative. General and administrative expenses are primarily comprised of salaries and related costs for corporate and administrative personnel, as well as other non-personnel related expenses. Our general and administrative expenses were $22.5 million and $60.3 million for the three and nine month periods ended September 28, 2024, respectively, as compared to $18.1 million and $56.1 million for the three and nine month periods ended September 30, 2023, respectively. The increase in general and administrative expenses of $4.4 million for the three month period ended September 28, 2024, as compared to the three month period ended September 30, 2023, was primarily due to increases in compensation costs of $3.7 million, other office expense costs of $0.6 million, and travel costs of $0.1 million. The increase in general and administrative expenses of $4.2 million for the nine month period ended September 28, 2024, as compared to the nine month period ended September 30, 2023, was primarily due to increases in compensation costs of $2.6 million, depreciation and amortization of $1.3 million, travel costs of $0.6 million and other office expense costs of $0.4 million, partially offset by an decrease in outside services costs of $0.7 million.

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Amortization of Identifiable Intangible Assets. Amortization of identifiable intangible assets was $13.1 million and $39.3 million for the three and nine month periods ended September 28, 2024, respectively, compared to $13.8 million and $41.5 million for the three and nine month periods ended September 30, 2023, respectively. The decreases in amortization of identifiable intangible assets of $0.7 million and $2.2 million for the three and nine month periods ended September 28, 2024, as compared to the three and nine month periods ended September 30, 2023, respectively, were primarily due to certain assets becoming fully amortized.

Interest income, net. Net interest income was $8.7 million and $24.5 million for the three and nine month periods ended September 28, 2024, respectively, as compared to $5.7 million and $13.9 million for the three and nine month periods ended September 30, 2023, respectively. The increases in net interest income for both the three and nine month periods ended September 28, 2024, as compared to the three and nine month periods ended September 30, 2023, were due to higher cash and marketable securities balances and higher interest rates during the 2024 period.

Other (expense) income, net. Other expense, net was $0.7 million for the three month period ended September 28, 2024, as compared to $1.0 million for the same period in the prior year. Other income, net was $10 thousand for the nine month period ended September 28, 2024, as compared to other expense, net of $3.0 million for the same period in the prior year. Decreases in foreign exchange losses, net during all of the comparative periods presented were the primary drivers in the period over period changes.

Income Taxes. We recorded an income tax provision of $8.0 million and $16.3 million for the three and nine month periods ended September 28, 2024, respectively, as compared to $2.8 million and $7.9 million for the three and nine month periods ended September 30, 2023, respectively. Our effective tax rates of 13% and 10% for the three and nine month periods ended September 28, 2024 respectively, differ from the statutory rate of 21%, primarily due to (i) research and development tax credits, (ii) the deduction related to foreign derived intangible income (“FDII”), and (iii) excess tax benefits associated with equity compensation. Our effective tax rate of 7% and 8% for the three and nine month periods ended September 30, 2023, respectively, differed from the statutory rate of 21%, primarily due to (i) research and development tax credits, (ii) the deduction related to FDII, and (iii) excess tax benefits associated with equity compensation.

Our future effective income tax rate depends on various factors, such as possible changes in tax legislation, the geographic composition of our pre-tax income, the amount of our pre-tax income as business activities fluctuate, non-deductible expenses incurred in connection with business combinations, and research and development tax credits as a percentage of aggregate pre-tax income.

We currently have a partial valuation allowance recorded for certain foreign and state loss and credit carryforwards where the realizability of such deferred tax assets is substantially in doubt. Each quarter we assess the likelihood that we will be able to recover our deferred tax assets primarily relating to state research and development credits. We consider available evidence, both positive and negative, including historical levels of income, expectations and risks associated with estimates of future taxable income and ongoing prudent and feasible tax planning strategies in assessing the need for a valuation allowance. As a result of our analysis, we concluded that it is more likely than not that a portion of our net deferred tax assets will not be realized. Therefore, we continue to provide a valuation allowance against certain net deferred tax assets. We continue to monitor available evidence and may reverse some or all of the valuation allowance in future periods, if appropriate.

The Organization for Economic Co-operation and Development (“OECD”) has been working on a Base Erosion and Profits Shifting project that, upon implementation, would change various aspects of the existing framework under which our tax obligations are determined in many of the countries in which we operate. In this regard, the OECD has proposed policies aiming

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to modernize global tax systems, including a country-by-country 15% minimum effective tax rate (“Pillar Two”) for multinational companies. Numerous countries have enacted, or are in the process of enacting, legislation to implement the Pillar Two model rules with a subset of the rules becoming effective during the current year, and the remaining rules becoming effective in later periods. At this point in time, we do not expect any material tax impact associated with Pillar Two rules in the countries where we operate. As these rules continue to evolve with new legislation and guidance, we will continue to monitor and account for the enactment of Pillar Two and the potential impacts such rules may have on our effective tax rate and cash flows in future years.

Liquidity and Capital Resources

Our cash, cash equivalents and marketable securities consist of the following in dollars (thousands) for the periods indicated:


	September 28,		December 30,
	2024		2023
Cash and cash equivalents	$	188,738	$	233,508
Marketable securities		666,666		464,303
Total cash, cash equivalents and marketable securities	$	855,404	$	697,811

Sources and Uses of Cash

A summary of cash provided by (used in) operating, investing, and financing activities is as follows in dollars (thousands) for the periods indicated:


	Nine Months Ended
	September 28,			September 30,
	2024			2023
Cash provided by operating activities	$	189,677		$	110,387
Cash used in investing activities	$	(222,451	)	$	(66,259	)
Cash used in financing activities	$	(10,000	)	$	(9,082	)

Operating Activities

Net cash and cash equivalents provided by operating activities for the nine months ended September 28, 2024 were $189.7 million. The net cash and cash equivalents provided by operating activities during the nine months ended September 28, 2024 resulted primarily from net income, adjusted to exclude the effect of non-cash operating charges, of $214.7 million. Significant non-cash operating charges included depreciation, amortization, share-based compensation, provision for inventory valuation and deferred income taxes. Cash provided by operating activities for the first nine months of fiscal 2024 increased compared to the corresponding period in fiscal 2023 primarily due to improved inventory management, higher cash collections and higher investment income.

Our working capital was $1,313.2 million at September 28, 2024 and $1,135.5 million at December 30, 2023.

Investing Activities

Net cash and cash equivalents used in investing activities for the nine months ended September 28, 2024 were $222.5 million. During the nine months ended September 28, 2024, net cash and cash equivalents used in investing activities included purchases of marketable securities of $538.1 million and capital expenditures of $27.3 million, partially offset by proceeds from maturities and sales of marketable securities of $343.0 million .

From time to time, we evaluate whether to acquire new or complementary businesses, products or technologies. We may fund all of or a portion of the price of these investments or acquisitions in cash, stock, or a combination of cash and stock.

Financing Activities

Net cash and cash equivalents used in financing activities for the nine months ended September 28, 2024 were $10 million. During the nine months ended September 28, 2024, financing activities used cash primarily for tax payments related to shares withheld to satisfy employee tax obligations in connection with the vesting of awards under share-based compensation plans of $18.4 million, partially offset by proceeds from sales of shares through share-based compensation plans of $9.2 million.

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In February 2024, the Onto Innovation Board of Directors approved a share repurchase authorization, which allows the Company to repurchase up to $200 million worth of shares of its common stock. Repurchases may be made through both public market and private transactions from time to time. During the three and nine months ended September 28, 2024, we repurchased no shares of common stock under this repurchase authorization. As of September 28, 2024, there was $200 million available for future share repurchases under this share repurchase authorization.

We have a credit agreement with a bank that provides for a variable-rate line of credit that is secured by the marketable securities we have with the bank. We are permitted to borrow up to 70% of the value of eligible securities held at the time the line of credit is accessed, up to a maximum of $100 million. As of September 28, 2024, the available line of credit was $100 million with an available interest rate of 6.6%. The credit agreement is available to us until such time that either party terminates the arrangement at its discretion. As of the date of this filing, we have not utilized the line of credit.

Our future capital requirements will depend on many factors, including the timing and amount of our revenue and our investment decisions, which will affect our ability to generate additional cash. We expect that our existing cash, cash equivalents, marketable securities and availability under our line of credit will be sufficient to meet our anticipated cash requirements for working capital, capital expenditures and other cash needs for the next 12 months following the filing of this Form 10-Q. Thereafter, if cash generated from operations and financing activities is insufficient to satisfy our working capital requirements, we may seek additional funding through bank borrowings, sales of securities or other means. A reduction in or volatility with respect to our stock price or a general market downturn could materially impact our ability to sell securities on favorable terms or at all. There can be no assurance that we will be able to raise any such capital on terms acceptable to us or at all.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

There have been no material changes in market risk from the information presented in Part II, Item 7A. “Quantitative and Qualitative Disclosures About Market Risk,” in the 2023 Form 10-K.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time period specified in SEC rules and forms. These controls and procedures are also designed to ensure that such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating disclosure controls and procedures, we have recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. Management is required to apply judgment in evaluating its controls and procedures.

We performed an evaluation under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, to assess the effectiveness of the design and operation of our disclosure controls and procedures under the Exchange Act as of September 28, 2024. Based on that evaluation, our management, including our principal executive officer and principal financial officer, concluded that our disclosure controls and procedures were effective as of September 28, 2024 at the reasonable assurance level.

Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) that occurred during our fiscal quarter ended September 28, 2024 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II OTHER INFORMATION

Item 1. Legal Proceedings

For a description of our material pending legal proceedings refer to the information set forth under “Legal Matters” of Note 7, “Commitments and Contingencies,” to the Condensed Consolidated Financial Statements included in Part 1, Item 1 of this Form 10-Q.

Item 1A. Risk Factors.

Below is a summary of the principal factors and uncertainties that make investing in our company risky. You should read this summary together with the more detailed description of each risk factor contained further below.

Risks Related to Our Operations

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If we do not manage our supply chain effectively, our operating results may be adversely affected, and any increases in material, labor, supplier, logistics and other operating costs, or supply chain delays and shortages, could lower our margins or result in lost sales.

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Variations in the amount of time it takes for us to sell our systems may cause fluctuations in our operating results, which could cause our stock price to decline.

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We are subject to order and shipment uncertainties. Our profitability will decline if we fail to accurately forecast customer demand when managing inventory.

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If we deliver systems with defects, our credibility will be harmed, and the sales and market acceptance of our systems will decrease.

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Our integrated metrology systems are integrated with systems sold independently by wafer fabrication equipment suppliers, and a decrease in sales by these suppliers, or the development of competing systems by these suppliers, could harm our business.

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We must attract and retain experienced senior executives and other key personnel with knowledge of semiconductor device manufacturing and inspection, metrology or lithography equipment and related software to help support our future growth, and competition for such personnel in our industry is high.

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Any prolonged disruption in the operations of our manufacturing facilities could have a material adverse effect on our revenue.

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We outsource select manufacturing activities to third-party service providers, which decreases our control over the performance of these functions, may result in lower quality and functionality of our products, and exposes us to additional supply chain risks.

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Our ability to fulfill our backlog may have an effect on our long-term ability to procure contracts and fulfill current contracts.

Risks Related to Our Customers

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Our largest customers account for a substantial portion of our revenue, and our revenue and cash flows could decline considerably if one or more of these customers were to purchase significantly fewer of our systems or delay or cancel a large order.

Risks Related to Product Development

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If we are not successful in developing new and enhanced products for the semiconductor device manufacturing industry, we will lose sales and market share to our competitors.

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If new products developed by us do not gain general market acceptance, we will be unable to generate revenue and recover our investments, which may result in a write down of inventory.

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Even if we are able to develop new products that gain market acceptance, sales of these new products could impair our ability to sell existing products.

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If our relationships with our large customers deteriorate, our product development activities could be adversely affected.

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Risks Related to Intellectual Property and Data Security

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We may fail to adequately protect our intellectual property and, therefore, lose our competitive advantage.

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Protection of our intellectual property rights, or the efforts of third parties to enforce their own intellectual property rights against us, may result in costly and time-consuming litigation, substantial damages, lost product sales and/or the loss of important intellectual property rights.

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If our network security measures are breached and unauthorized access is obtained to a customer’s data, to our data, or to our information technology systems, we may incur significant legal and financial exposure and liabilities and may experience disruptions in our operations.

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Compliance with data protection laws may be costly and may impede development of new products, and any failure to comply with, or inquiries under, these laws could have a material adverse effect on our business, results of operations and financial condition.

Risks Related to Competition

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Some of our current and potential competitors have significantly greater resources than we do, and increased competition could impair sales of our products or cause us to reduce our prices.

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Because of the high cost of switching equipment vendors in our markets, it is sometimes difficult for us to win new customers from our competitors even if our systems are superior to theirs.

Risks Related to Our International Operations

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Tariffs, export regulations, and other market barriers have impacted and may continue to impact our ability to compete for the business of domestic customers in China and other jurisdictions, which has adversely affected and may continue to adversely affect our, business, financial condition and results of operations.

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We are subject to compliance with domestic and foreign laws and regulations, and the burden of complying with such laws and regulations, or any failure to comply, has adversely affected and may continue to adversely affect our business, financial condition and results of operations.

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Political and economic instability may result in reduced demand for our products.

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Natural disasters, changes in climate, public health crises, and geo-political conflicts could materially adversely affect our worldwide operations (or those of our business partners).

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We may face difficulties in staffing and managing foreign branch operations due to political tensions or cultural differences.

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Currency fluctuations may impact our international sales or expose us to exchange rate risk.

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Our internal controls with respect to anti-corruption laws may not be effective, and any failure to comply with such laws may result in severe sanctions and liabilities, which may negatively affect our business, operating results and financial condition.

Risks Related to Laws, Legal Proceedings, Financial Markets and the Environment

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Changes in tax rates or tax liabilities could affect results.

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Turmoil or fluctuations in the credit markets and the financial services industry may negatively impact our business, results of operations, financial condition or liquidity, and our factoring arrangements may expose us to additional risks.

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We are subject to various environmental laws and regulations that could impose substantial costs upon us, and failure to comply with such laws and regulations may harm our business, operating results and financial condition.

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Legal proceedings, claims and investigations may expose us to increased costs and may negatively affect our business and results of operations.

Risks Related to Growth and Acquisitions

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We may choose to acquire new and complementary businesses, products or technologies instead of developing them ourselves, and we may be unable to complete these acquisitions or may not be able to successfully integrate an acquired business in a cost-effective and non-disruptive manner.

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•

If we cannot effectively manage growth, our business may suffer.

Risks Related to the Global Economy and the Semiconductor Industry

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Cyclicality in the semiconductor device industry has led to substantial decreases in demand for our systems in the past and may, from time to time, continue to do so.

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Our future rate of growth is highly dependent on the development and growth of the market for microelectronic device inspection, lithography and metrology equipment.

General Risk Factors

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Provisions of our charter documents and of Delaware law could discourage potential acquisition proposals and/or delay, deter or prevent a change in control of our company.

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Our stock price is volatile.

Risks Related to Our Operations

We need to continually evaluate our global supply chains and assess opportunities to reduce costs. We must also enhance quality, speed and flexibility to meet changing demand for our products and product mix and uncertain market conditions. Our success also depends in part on refining our cost structure and supply chains so that we have flexibility and can maintain and improve profitability. Deterioration in the tariff environment, political instability or changes in suppliers may cause our costs to increase and, if we are not able to offset the increased costs by charging higher sales prices, will cause a decline in our margins. To improve margins on our products, we would need to negotiate price reductions with our vendors. But we cannot be certain that we will be able to do so in a timely manner, or at all. Failure to achieve the desired level of cost reductions could adversely affect our financial results. Despite our efforts to control costs and increase efficiency in our facilities, changes in demand could still cause us to realize lower operating margins and profitability.

Further, our gross margins and financial performance may be adversely affected by increases in our operating costs, such as material, labor, supplier costs, logistics and energy costs, all of which have been and may continue to be subject to inflationary pressures. Operating costs have increased and may continue to increase further as a result of supply chain disruptions in connection with the sourcing of components, materials, equipment, engineering support, and services, labor shortages, high inflation rates, and cost increases attributable to the COVID-19 pandemic and the effects of the Russia-Ukraine conflict. In addition, we source components for certain of our tools from a supplier in Israel. If the conflict in Israel and the surrounding area escalates, it could disrupt our supply chain, resulting in a material adverse impact on our business.

These risks may be heightened because we obtain some of the components and subassemblies included in our systems from a limited group of suppliers and do not have long-term contracts with many of our suppliers. Our dependence on limited-source suppliers of components and our lack of long-term contracts with certain of our suppliers expose us to several risks, including a potential inability to obtain an adequate supply of components, price increases, late deliveries and poor component quality. A significant number of our suppliers are the sole source or single source for certain components or subassemblies. If such a supplier is unable or unwilling to manufacture and deliver components to us on the time schedule and of the quality or quantity that we require, we may be forced to seek to engage an additional or replacement supplier or redesign our product to use alternative components, which could result in additional expenses and delays in product development or shipment of product to our customers. Disruption or termination of the supply of components has delayed and could in the future delay shipments of some of our systems. Such delays may damage our customer relationships and reduce our sales. The lead time required for shipments of some of our components can be greater than six months. In addition, the lead time required to qualify new suppliers for lasers and certain optics could be as long as a year, and the lead time required to qualify new suppliers of other components could be as long as nine months. In some cases, we may need to purchase components in advance of receiving customer orders for product. If we are unable to accurately predict our component needs, or if our component supply is disrupted, we may miss market opportunities by not being able to meet the demand for our systems. Further, a significant increase in the price of one or more of these components or subassemblies could seriously harm our results of operations and cash flows.

Our efforts to mitigate any cost increases, labor impacts and supply chain delays and shortages may not be successful, and we cannot predict the duration of these current trends or other future increases in operating costs. We may not be able to pass cost increases through to our customers fully (or at all), and if supply chain delays and shortages delay delivery of our products,

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our customers may seek to purchase from our competitors. Any such occurrence may have a material adverse impact on our gross margins and business, financial position, results of operations and cash flows.

Variations in the amount of time it takes for us to sell our systems may cause fluctuations in our operating results, which could cause our stock price to decline.

Variations in the length of our sales cycles could cause our revenue and cash flows, and consequently, our business, financial condition, operating results and cash flows to fluctuate widely from period to period. This variation could cause our stock price to decline. Our customers generally take a long time to evaluate our inspection and/or film metrology systems and many people are involved in the evaluation process. We expend significant resources educating and providing information to our prospective customers regarding the uses and benefits of our systems in the semiconductor fabrication process. The length of time it takes for us to make a sale depends upon many factors, including, but not limited to:

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the efforts of our sales force;

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the complexity of the customer’s fabrication processes;

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the internal technical capabilities and sophistication of the customer;

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the customer’s budgetary constraints; and

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the quality and sophistication of the customer’s current metrology, inspection or lithography equipment.

Because of the number of factors influencing the sales process, the period between our initial contact with a customer and the time when we recognize revenue from that customer and receive payment, if ever, varies widely in length. Our sales cycles, including the time it takes for us to build a product to customer specifications after receiving an order to the time we recognize revenue, typically range from three to twenty-four months. Sometimes our sales cycles can be much longer, particularly with customers in Asia. During these cycles, we commit substantial resources to our sales efforts in advance of receiving any revenue, and we may never receive any revenue from a customer despite our sales efforts. If we do make a sale, our customers often purchase only one of our systems, the performance of which they then evaluate for a lengthy period before purchasing any more of our systems. The number of additional products a customer purchases, if any, depends on many factors, including the customer’s capacity requirements. The period between a customer’s initial purchase and any subsequent purchases can vary from three months to a year or longer, and variations in the length of this period could cause further fluctuations in our operating results and, possibly, in our stock price.

We are subject to order and shipment uncertainties. Our profitability will decline if we fail to accurately forecast customer demand when managing inventory.

We typically plan production and inventory levels based on internal forecasts of customer demand, which can be highly unpredictable and can fluctuate substantially, which could lead to excess inventory write-downs and result in negative impacts on gross margin and net income. We have limited visibility into our customers’ inventories, future customer demand and the product mix that our customers will require, which could adversely affect our production forecasts and operating margins. Certain of our customers have publicly stated their intent to decrease their memory product inventory levels as lead time for components begins to decrease. This has and could continue to result in a temporary decrease in demand for our products as customers delay capacity expansions until inventory levels are sufficiently reduced. In addition, innovation in our industry could render significant portions of our inventory obsolete. If we overestimate our customers’ requirements, we may have excess inventory, which could lead to obsolete inventory and unexpected costs. Conversely, if we underestimate our customers’ requirements, or if we experience sustained disruptions to our supply chain or shipping delays, we may have inadequate inventory, which could lead to foregone revenue opportunities, loss of potential market share and damage to customer relationships as product deliveries may not be made on a timely basis, disrupting our customers’ production schedules. In response to anticipated long lead times to obtain inventory and materials from outside suppliers and foundries, we periodically order materials in advance of customer demand. This advance ordering has in the past and may in the future result in excess inventory levels or unanticipated inventory write-downs if expected orders fail to materialize, or other factors make our products less saleable. In addition, any significant future cancellation or deferral of product orders could adversely affect our revenue and margins, increase inventory write-downs due to obsolete inventory, and adversely affect our operating results and stock price.

Our earnings could be negatively affected, and our inventory levels could materially increase, if we are unable to predict our inventory needs in an accurate and timely manner and adjust our orders for parts and subcomponents in the event that our needs increase or decrease materially due to unexpected increases or decreases in demand for our products. Any material increase in our inventories could result in an adverse effect on our financial position, while any material decrease in our ability to procure needed inventories could result in an inability to supply customer demand for our products, thus adversely affecting our revenue.

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If we deliver systems with defects, our credibility will be harmed, and the sales and market acceptance of our systems will decrease.

Our systems are complex and have occasionally contained errors, defects and bugs when introduced. Defects may be created during probing, bumping, dicing or general handling, and can have a major impact on device and process quality. When this occurs, our credibility and the market acceptance and sales of our systems could be harmed. Further, if our systems contain errors, defects or bugs, computer viruses or malicious code as a result of cyber-attacks to our computer networks, we may be required to expend significant capital and resources to alleviate these problems. Defects could also lead to product liability as a result of product liability lawsuits against us or against our customers. We have agreed to indemnify our customers under certain circumstances against liability arising from defects in our systems provided that we also include a cap on our liability in the related sales agreements. Our product liability insurance policy currently provides both aggregate coverage as well as an overall umbrella coverage. In the event of a successful product liability claim, we could be obligated to pay damages significantly in excess of our product liability insurance limits.

We believe that sales of integrated metrology systems will continue to be an important source of our net revenues. Sales of our integrated metrology systems depend upon the ability of a small number of wafer fabrication equipment suppliers to sell semiconductor manufacturing equipment products that are compatible with our metrology systems as components. If these suppliers are unable to sell such products, if they choose to focus their attention on products that do not integrate with our systems, or if they choose to develop competing systems, our business could suffer.

Our success depends, to a significant degree, upon the continued contributions of our key executive management, engineering, sales and marketing, customer support, finance and manufacturing personnel. The loss of any of these key personnel, each of whom would be extremely difficult to replace, through resignations, retirement or other circumstances, could harm our business and operating results. Despite our employment and noncompetition agreements with key members of our senior management team, these individuals or other key employees may still leave us, which could have a material adverse effect on our business. We do not have key person life insurance on any of our executives. In addition, to support our future growth, we will need to attract and retain additional qualified employees. Competition for such personnel in our industry is intense, and we may not be successful in attracting and retaining qualified employees.

The expansion of high technology companies worldwide and growth in the demand for semiconductors have increased demand and competition for qualified personnel. Competition for engineering and other technical personnel in some of the markets in which we operate is especially intense due to continued increases in the number of technology companies worldwide. In order to attract and retain executives and other key employees, we must provide a competitive compensation package, including cash and stock-based compensation. If the anticipated value of our stock-based incentive awards does not materialize so that they cease to be viewed as valuable, if our profits decrease, or if our total compensation package is not viewed as competitive, our ability to attract, retain and motivate executives and key employees could be weakened.

Any prolonged disruption in the operations of our manufacturing facilities could have a material adverse effect on our revenue.

We produce the majority of our systems in our manufacturing facilities located in Wilmington, Massachusetts, Milpitas, California and Bloomington, Minnesota. We also use contract manufacturers in China, Japan and the United States. Our manufacturing processes are highly complex and require sophisticated and costly equipment and a specially designed facility. As a result, any prolonged disruption in the operations of our manufacturing facilities could seriously harm our ability to satisfy our customer order deadlines. Restrictions on our access to or operation of manufacturing facilities or on our support operations or workforce, or similar limitations for our vendors and suppliers, may impact our ability to meet customer demand and could have a material adverse effect on our financial condition and results of operations. If we cannot timely deliver our systems, our results from operations and cash flows could be materially and adversely affected.

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We outsource select product manufacturing to third-party service providers. Outsourcing reduces our control over the performance of the outsourced functions. Dependence on outsourcing may also adversely affect our ability to bring new products to market. If we do not effectively manage our outsourcing strategy or if third-party service providers do not perform as anticipated, we may experience operational difficulties, increased costs, manufacturing interruptions or inefficiencies in the operation of our supply chain, any or all of which could delay our delivery of products to our customers, and materially and adversely affect our business, financial condition, and results of operations.

Our third-party service providers could also be, and certain of our service providers have been, subject to cybersecurity incidents or other events that negatively impact their operations and their ability to perform services for us in a timely manner or at all. Such disruptions could impact our ability to manufacture products in a timely manner or force us to work with another service provider at a higher cost. Any such event could materially and adversely affect our business, financial condition, and results of operations. In addition, some of our third-party party services providers also have product designs, know-how, data files and other important confidential information regarding our products. If a third-party service provider experiences a cybersecurity event in which such confidential information is publicly exposed or shared with bad actors, it could materially and adversely impact our competitive position in the market.

Our ability to fulfill our backlog may have an effect on our long-term ability to procure contracts and fulfill current contracts.

Our ability to fulfill our backlog may be limited by our ability to devote sufficient financial and human capital resources and may be limited by available material supplies and our suppliers’ own supply chain issues. If we do not fulfill our backlog in a timely manner, we may experience delays in product delivery, which would postpone receipt of revenue from those delayed deliveries. Delayed fulfillment also increases the risk that a customer may change or cancel an order due to evolution of the customer’s technological, production or market needs, which would result in a loss of revenue. Additionally, if we are consistently unable to fulfill our backlog, this may be a disincentive to customers to award large contracts to us in the future until they are comfortable that we can effectively manage our backlog.

Risks Related to Our Customers

Sales to end user customers that individually represent at least ten percent of our revenue typically account for, in the aggregate, a considerable amount of our revenue. We operate in the highly concentrated, capital-intensive semiconductor device manufacturing industry. Historically, a substantial portion of our revenue in each quarter and year has been derived from sales to relatively few customers, and this trend is expected to continue. If any of our key customers were to purchase significantly fewer of our systems in the future, or if they delay or cancel a large order, our revenue and cash flows could meaningfully decline. We expect that we will continue to depend on a small number of large customers for a sizable portion of our revenue. In addition, as large semiconductor device manufacturers seek to establish closer relationships with their suppliers, we expect that our customer base will become even more concentrated.

Risks Related to Product Development

If we are not successful in developing new and enhanced products for the semiconductor device manufacturing industry, we will lose sales and market share to our competitors.

We operate in an industry that is highly competitive and subject to evolving industry standards, rapid technological changes, rapid changes in consumer demands and the rapid introduction of new, higher performance systems with shorter product life cycles. To be competitive in our demanding market, we must continually design, develop and introduce in a timely manner new lithography, inspection and metrology process control systems that meet the performance and price demands of semiconductor device manufacturers. We must also continue to refine our current systems so that they remain competitive. We expect to continue to make significant investments in our research and development activities and at times may make inventory investments prior to commercialization. We may experience difficulties or delays in our development efforts with respect to new systems, and we may not ultimately be successful in our product enhancement efforts to improve and advance products or in responding effectively to technological change, as not all research and development activities result in viable commercial

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products. In addition, we cannot provide assurance that we will be able to develop new products for the most opportunistic new markets and applications. Any significant delay in releasing new systems could cause our products to become obsolete, adversely affect our reputation, give a competitor a first-to-market advantage or cause a competitor to achieve greater market share. Our competitors may also develop products, including through the use of artificial intelligence, that may have performance advantages over systems we currently offer or may offer in the future, which could similarly weaken our competitive position.

Further, customers that may otherwise desire to purchase our products from us and purchase other products from our competitors may nevertheless purchase competing products from our competitors rather than purchase our products due to a variety of reasons, including to gain favorable or volume pricing from our competitors.

If new products developed by us do not gain general market acceptance, we will be unable to generate revenue and recover our investments, which may result in a write down of inventory.

Inspection, lithography and metrology product development is inherently risky because it is difficult to foresee developments in semiconductor device manufacturing technology, coordinate technical personnel, and identify and eliminate system design flaws. Further, our products are leading edge and complex, and often the applications to our customers’ businesses are unique. Any new systems we introduce may not achieve or sustain a significant degree of market acceptance and sales.

We expect to spend a significant amount of time and resources developing new systems and refining our existing systems. In light of the long product development cycles inherent in our industry, these expenditures will be made well in advance of the prospect of deriving revenue from the sale of those systems. The long lead times for some components may also require us to place orders for components and accumulate inventory in advance of market acceptance of our products.

Our ability to commercially introduce and successfully market new systems is subject to a wide variety of challenges during the development cycle, including start-up bugs, design defects, and other matters that could delay introduction of these systems. Since our customers are not obligated by long-term contracts to purchase our systems, our anticipated product orders may not materialize, or orders that are placed may be canceled.

If we do not achieve market acceptance of new products, we may be unable to generate sufficient revenue and cash flow to recover our research and development costs and may experience a write down of our investments in inventory. As a result, our market share, revenue, operating results or stock price could be negatively impacted.

Even if we are able to develop new products that gain market acceptance, sales of these new products could impair our ability to sell existing products.

Competition from our new systems could have a negative effect on sales of our existing systems and the prices that we could charge for these systems. We may also divert sales and marketing resources from our current systems in order to successfully launch and promote our new or next generation systems. This diversion of resources could have a further negative effect on sales of our current systems and the value of inventory.

If our relationships with our large customers deteriorate, our product development activities could be adversely affected.

The success of our product development efforts depends on our ability to anticipate market trends and the price, performance and functionality requirements of semiconductor device manufacturers. In order to anticipate these trends and ensure that critical development projects proceed in a coordinated manner, we must continue to collaborate closely with our largest customers. Our relationships with these and other customers provide us with access to valuable information regarding trends in the semiconductor device industry, which enables us to better plan our product development activities. If our current relationships with our large customers are impaired, or if we are unable to develop similar collaborative relationships with important customers in the future, our product development activities could be adversely affected.

Risks Related to Intellectual Property and Data Security

We may fail to adequately protect our intellectual property and, therefore, lose our competitive advantage.

Our future success and competitive position depend in part upon our ability to obtain and maintain proprietary technology for our principal product families. If we fail to adequately protect our intellectual property, it will give our competitors a significant advantage. We own or have licensed a number of patents relating to our metrology, lithography, wafer and defect inspection systems, as well as artificial intelligence and machine learning systems, and software, including both embedded and application software, and have filed applications for additional patents. Any of our pending patent applications may be rejected, however, and we may be unable to develop additional proprietary technology that is patentable in the future. In addition, the patents that we do own or that have been issued or licensed to us may not provide us with competitive advantages and/or may be

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invalidated, unenforceable and/or challenged by third parties. Third parties may also design around our patents or copy our patented inventions without our knowledge.

In addition to patent protection, we rely upon copyrights for protection of our proprietary software and documentation, trademarks for protection of our brand and source of goods, and trade secret law and confidentiality and non-compete agreements for protection of our confidential and proprietary information and technology. These measures do not guarantee protection of our intellectual property, however. We can give no assurance that our copyrights will be upheld or will successfully deter infringement by third parties. There can be no assurances that our confidentiality agreements with employees and other third parties will be sufficient to protect our trade secrets and proprietary information or that such information will not be disclosed, that others will not independently develop substantially equivalent proprietary information and techniques or otherwise gain access to our trade secrets, or that we can fully protect our trade secrets and proprietary information. Violations by others of our confidentiality agreements and the loss of employees who have specialized knowledge and expertise could harm our competitive position and cause our sales and operating results to decline as a result of increased competition. It is also possible that third parties will misappropriate our trade secrets or other confidential information. We may be subject to cybersecurity breaches in which a third party obtains our confidential information. Third parties may also reverse engineer our products to copy our technology. Failure to protect our trademarks can lead to other companies selling products using confusing similar names, thereby damaging our brand. In some countries, it can be difficult to register trademarks because of the strict examination process or blocking trademarks for other goods. Costly and time-consuming litigation might be necessary to enforce and determine the scope of our intellectual property rights, and failure to obtain or maintain trade secret protection might adversely affect our ability to continue our research or bring products to market. Any of these circumstances could result in harm to our competitive position in the market.

Monitoring and preventing unauthorized use are also difficult and the measures we take to protect our intellectual property rights may not be adequate. There is a risk that we may be unable to adequately protect our intellectual property rights in certain foreign countries. For example, our competitors may independently develop similar technology or duplicate our products. If this occurs, it could be easier for our competitors to develop and sell competing products in these countries. Accordingly, infringement of our intellectual property rights poses a serious risk to our ability to conduct business.

From time to time, we may be required to initiate litigation in order to enforce our intellectual property rights or to determine the non-infringement, scope or validity of a third party’s intellectual property rights. Any litigation, regardless of outcome, could be expensive and time consuming and could subject us to significant liabilities or require us to re-engineer our products or obtain expensive licenses from third parties. There can be no assurance that any patents, copyrights or other intellectual property rights issued to or licensed by us will not be challenged, invalidated or circumvented, or that the rights granted thereunder will provide us with a competitive advantage. Furthermore, there is no assurance that any litigation we are involved in will yield the result that we seek as (i) the lawsuit may be dismissed or there could be an adverse finding, (ii) we may not be able to pursue the lawsuit due to the laws of the applicable country or (iii) there may be a subsequent unfavorable change in law that limits our ability to pursue the lawsuit. For example, litigation discovery practice in China, Japan, South Korea, continental Europe and Taiwan is not as robust as in the United States, so it can be more difficult to determine if a company is infringing on our patents and more challenging to bring a lawsuit.

In addition, our commercial success depends in part on our ability to avoid infringing or misappropriating patents or other intellectual property rights owned by third parties. From time to time, we receive communications from third parties asserting that our products or systems infringe, or may infringe, on the intellectual property rights of these third parties. These claims of infringement may lead to protracted and costly litigation, which could require us to pay substantial damages or have the sale of our products or systems stopped by an injunction. Infringement claims could also cause product or system delays or require us to redesign our products or systems, and these delays could result in the loss of substantial revenue. We may also be required to obtain a license from the third party or cease activities utilizing the third party’s intellectual property rights. We may not be able to enter into such a license or such a license may not be available on commercially reasonable terms. Accordingly, the loss of an intellectual property dispute could hinder our ability to sell our products or systems or make the sale of our products or systems more expensive, which could lead to reduced revenue or lower margins, respectively.

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As part of our business, we store our data and certain data about our customers, vendors and employees in our information technology system. We also rely on our information technology system for business operations. If there is a breach as a result of third-party action, including through the use of artificial intelligence, employee misuse, human error, malfeasance, break-ins or otherwise, of our security measures designed to protect this information and prevent data loss and other security breaches, and someone obtains unauthorized access to our customers’, vendors’ or employees’ data or disrupts our access to our own data and systems, we could face loss of business, regulatory investigations or court orders or damage to our reputation, and we could be required to expend significant capital and other resources to alleviate the problem, as well as incur significant costs and liabilities, including due to litigation, indemnity obligations, damages for contract breach, penalties for violation of applicable laws or regulations, and costs for remediation and other incentives offered to customers.

Cyber-attacks and other malicious internet-based activities continue to increase. The Russia–Ukraine conflict and related sanctions imposed by the U.S. government may expose government entities and public and private U.S. companies to attempted or actual cybersecurity attacks launched in retaliation, and these attacks could materially disrupt our supply chain or our systems and operations or those of our customers and suppliers.

As the techniques used to obtain unauthorized access or sabotage systems change frequently and generally are not identified until they are launched against a target, our ability to anticipate these techniques or to implement adequate preventative measures is reduced. In addition, third parties have made attempts to fraudulently induce employees or users to disclose information to gain access to our data or our customers’ data. As a result of any of these events, our or our customers’ and vendors’ information could be accessed or disclosed improperly. In addition, cybersecurity incidents affecting our customers could result in substantial delays in our ability to ship to those customers or install our products, which could result in delays in revenue recognition or the cancellation of orders. As discussed herein under the heading “We outsource select manufacturing activities to third-party service providers, which decreases our control over the performance of these functions and may result in lower quality and functionality of our products, and exposes us to increased supply chain risks,” cybersecurity incidents affecting our service providers could negatively impact our ability to timely and cost-effectively produce products and/or negatively impact our competitive position in the market. Likewise, cybersecurity events impacting our suppliers could result in substantial delays in our ability to obtain necessary components for our products from those suppliers, which could hamper our ability to ship our products to our customers, harming our results of operations and our customer relationships. Any or all of the above issues could negatively affect our ability to attract new customers, cause existing customers to choose to purchase from our competitors, result in reputational damage or subject us to third-party lawsuits, regulatory fines or other action or liability, which could adversely affect our operating results.

Compliance with data protection laws may be costly and may impede development of new products, and any failure to comply with, or inquiries under, these laws may could have a material adverse effect on our business, results of operations, and financial condition.

The General Data Protection Regulation (“GDPR”) is a regulation in European Union (“EU”) law on data protection and privacy for the individuals within the EU and the European Economic Area (“EEA”). It also addresses the export of personal data outside the EU and EEA areas. The United Kingdom has adopted legislation that substantially implements the GDPR and provides for a similar penalty structure. We are also subject to the California Consumer Privacy Act of 2018 (“CCPA”) and the California Privacy Rights Act (“CPRA”), an amendment and expansion of the CCPA. We may also be subject to other data privacy laws in the United States and the other countries in which we operate. In many cases, these laws apply not only to third-party transactions, but also to transfers of information between us and our subsidiaries, and among the subsidiaries and other parties with which we have commercial relations. The introduction of new products or expansion of our activities in certain jurisdictions may subject us to additional laws and regulations. These U.S. federal and state and foreign laws and regulations, including GDPR which can be enforced by private parties or government entities, are constantly evolving and can be subject to significant change. In addition, the application and interpretation of these laws and regulations, including GDPR, are often uncertain, particularly in our evolving industry, and may be interpreted and applied differently from country to country. Appropriate technical and organizational measures are necessary to implement these data protection principles. These laws and regulations can be costly to comply with and may delay or impede the development of new products, result in negative publicity, increase our operating costs, require significant management time and attention, or subject us to inquiries or investigations, claims or other remedies, including fines, which may be significant, or demands that we modify or cease existing business practices. A failure by us, our suppliers, or other parties with whom we do business to comply with posted privacy policies or with other federal, state, or international privacy-related or data protection laws and regulations, including GDPR, CCPA, CPRA and other new or changing privacy laws and regulations, could result in proceedings against us by governmental entities or others, which could have a material adverse effect on our business, results of operations, and financial condition.

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Risks Related to Competition

Some of our current and potential competitors have significantly greater resources than we do, and increased competition could impair sales of our products or cause us to reduce our prices.

The market for semiconductor capital equipment is highly competitive. We face substantial competition from established companies in each of the markets we serve. We principally compete with KLA, Nova, Camtek, Ushio, Canon, and PDF Solutions. Each of our products also competes with products that use different metrology, inspection or lithography techniques. Some of our competitors have greater financial, engineering, manufacturing and marketing resources, broader product offerings and service capabilities and larger installed customer bases than we do. As a result, these competitors may be able to respond more quickly to new or emerging technologies or market developments by devoting greater resources to the development, promotion and sale of products, which, in turn, could impair sales of our products. Further, there may be significant merger and acquisition activity among our competitors and potential competitors, which, in turn, may provide them with a competitive advantage over us by enabling them to rapidly expand their product offerings and service capabilities to meet a broader range of customer needs.

Many of our existing and potential customers in the semiconductor device manufacturing industry are large companies that require global support and service for their semiconductor capital equipment. Some of our competitors have more extensive support and service infrastructures than we do, which could place us at a disadvantage when competing for the business of global semiconductor device manufacturers. Many of our competitors are investing heavily in the development of new systems that will compete directly with our systems. We have, from time to time, selectively reduced prices on our systems in order to protect our market share, and competitive pressures may necessitate further price reductions. We expect our competitors in each product area to continue to improve the design and performance of their products and to introduce new products with competitive prices and performance characteristics. These product introductions would likely require us to decrease the prices of our systems and increase the level of discounts that we grant our customers. Price reductions or lost sales as a result of these competitive pressures would reduce our total revenue and could adversely impact our financial results.

Because of the high cost of switching equipment vendors in our markets, it is sometimes difficult for us to win new customers from our competitors even if our systems are superior to theirs.

We believe that once a semiconductor device manufacturer has selected one vendor’s capital equipment for a production-line application, the manufacturer generally relies upon that capital equipment and, to the extent possible, subsequent generations of the same vendor’s equipment for the life of the application. Once a vendor’s equipment has been installed in a production line application, a semiconductor device manufacturer must often make substantial technical modifications and may experience production-line downtime in order to switch to another vendor’s equipment. Accordingly, unless our systems offer performance or cost advantages that outweigh a customer’s expense of switching to our systems, it will be difficult for us to achieve significant sales to that manufacturer once it has selected another vendor’s capital equipment for an application.

Risks Related to Our International Operations

The semiconductor device industry is a high-visibility industry in many of the European and Asian countries in which we sell our products. Because the governments of these countries have provided extensive financial support to our semiconductor device manufacturing customers in these countries, we believe that our customers could be disproportionately affected by any trade embargoes, excise taxes, tariffs, or other restrictions imposed by their governments on trade with U.S. companies such as ourselves, particularly with respect to the ongoing tensions between the United States and China.

Over the last several years, the U.S. government has significantly expanded export controls on certain technologies and commodities to certain markets, particularly with respect to semiconductor and other high technology exports to China. For example, the U.S. Department of Commerce (“DoC”) has imposed export controls on the transfer of certain U.S. products and technologies to “military end users” in China, as well as restrictions on the transfer of U.S. products to certain companies, including Huawei Technologies Co., Ltd., and its affiliates. Most recently, in 2022, the DoC imposed new export controls related to the Chinese semiconductor manufacturing, advanced computing, and supercomputer industries. In 2022, the DoC also added a number of companies in China to the Unverified List and Entity List of the Export Administration Regulations (“EAR”), including Yangtze Memory Technologies Co., Ltd (YMTC). In October 2023, the DoC revised and expanded the 2022 export controls.

The effect of these changes, among others, is that Onto Innovation is required to conduct additional end-use diligence and in some instances obtain export licenses before providing products to certain customers. There can be no assurance that export

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licenses applied for by us or our customers will be granted in a timely manner or at all. We have experienced and may continue to experience a temporary loss of revenues while we are obtaining licenses with certain customers affected by export controls. Failure to obtain any required license could result in a reduction of anticipated revenues until we are able to replace unlicensed orders with other customer orders for which a license has been obtained or is not required, and there can be no assurance that replacement orders will be obtained on favorable terms, in a timely manner, or at all. In addition, any licenses that are granted to us or to our customers may have a short duration or require us to satisfy various conditions. Any of these occurrences could have a material adverse effect on our revenues, business, financial condition and results of operations. Further, we hold inventory of products that may be affected by these recent U.S. government actions, including potential order cancellations. If the sale of these products is delayed or we are unable to return or dispose of our inventory on favorable economic terms, we may incur additional carrying costs for the inventory or otherwise record charges associated with this inventory.

The administrative processing, attendant delays and risk of ultimately not obtaining required export approvals also put us at a disadvantage relative to our non-U.S. competitors who may not be required to comply with U.S. export controls. This difficulty and uncertainty has adversely affected our ability to compete for and win business from domestic customers in China.

It is possible that the U.S. government will impose additional export controls on our products or systems, which could lead to further revenue losses. Such changes could result in additional restrictions on our ability to sell products to customers in China and other jurisdictions. Foreign customers affected by current or future U.S. government sanctions, controls or threats of sanctions or controls may respond by developing their own solutions to replace our products or by utilizing our foreign competitors’ products (who are not subject to the same export controls and can fulfill the orders). In addition, these export controls may also reduce overall global demand for our customers’ products or for other products produced or manufactured in the U.S. or based on U.S. technology, in turn reducing demand for our products, which could have a material adverse effect on our business, financial condition and results of operations. Increased restrictions on China exports may also lead to regulatory retaliation by the Chinese government, which may adversely impact our business. International trade disputes could result in increases in tariffs and other trade restrictions and protectionist measures that could adversely impact our operations and reduce the competitiveness of our products relative to local and global competitors.

Our business is subject to risks inherent in doing business internationally, including compliance with, inconsistencies among, and unexpected changes in, a wide variety of foreign laws and regulatory environments, including, among other issues, with respect to employees, protection of our intellectual property, and a wide variety of operational regulations and trade and export controls under domestic, foreign, and international law.

We are faced with various risks that may be associated with our compliance with existing, new, different, inconsistent or conflicting laws, regulations and rules enacted by governments and/or their regulatory agencies in the countries in which we operate as well as rules and policies implemented at our customer sites. These laws, regulations, rules and policies could relate to any of an array of issues including, but not limited to, environmental, tax, intellectual property, trade secrets, product liability, contracts, antitrust, employment, securities, import/export and unfair competition. The cost of maintaining compliance under multiple and changing regulatory regimes may adversely affect our business, financial condition and results of operations, and, in the case of export controls, has adversely affected and may continue to adversely affect our results of operations. As discussed herein under the heading “Tariffs, export regulations, and other market barriers have impacted and may continue to impact both our ability to compete for the business of domestic customers in China and our results of operations,” the U.S. government issued new export control rules in 2022 and 2023 aimed at restricting China’s access to semiconductor equipment and advanced computing technology, among other things. To comply with the new rules, Onto Innovation has had to expend time and resources that might otherwise have been used for revenue generating activities. Further regulatory changes could require additional diversion of resources to compliance efforts. In addition, in the event that we fail to comply with or violate U.S. or foreign laws or regulations or customer policies, we could be subject to civil or criminal claims or proceedings that may result in monetary fines, penalties or other costs against us or our employees, which may adversely affect our operating results, financial condition, customer relations and ability to conduct our business.

Political and economic instability may result in reduced demand for our products.

We are subject to various global risks related to political and economic instabilities in countries in which we derive sales. If terrorist activities, armed conflict, civil or military unrest or political instability occurs outside of the United States, these events may result in reduced demand for our products or adversely affect our supply chain. For example, the Ukraine–Russia geographic region is a major source of critical raw materials used for semiconductor manufacturing (such as neon and palladium), and any supply chain disruptions or shortages of such materials due to the ongoing conflict in that region could impact our customers in

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a manner that reduces demand for our products. Similarly, if the conflict in Israel and the surrounding area escalates further, it could result in disruptions to our supply chain and/or the operations of our customers in a manner that reduces demand for our products.

In addition, due to the complex relationships among China, Hong Kong, Taiwan, and the United States, there is risk that political, diplomatic, and national security influences might lead to trade, technology, or capital disputes, or disruptions affecting the semiconductor industry. In particular, the escalation of geopolitical tensions between China and Taiwan may cause disruptions in the markets in which we operate and lead to a decreased demand for our products, which could adversely affect our business in Asia or have a negative impact on the regional or global economy.

Furthermore, an outbreak of hostilities or other political upheaval in China, Taiwan, Japan, or South Korea, or an economic downturn in Asia or globally, would likely harm the operations of our customers in these countries. The effect of these types of events on our revenue and cash flows could be material because we derive substantial revenue from sales to semiconductor device foundries in Taiwan such as Taiwan Semiconductor Manufacturing Company Ltd., from memory chip manufacturers in South Korea such as Samsung Electronics Co., Ltd., and from semiconductor device manufacturers in Japan such as Toshiba Corporation.

Natural disasters, changes in climate, public health crises, and geo-political conflicts could materially adversely affect our worldwide operations (or those of our business partners).

The occurrence of one or more natural disasters, such as hurricanes, tropical storms, fires, cyclones, earthquakes, tsunamis, flooding, typhoons, volcanic eruptions and weather conditions such as major or extended winter storms, droughts and tornadoes, whether as a result of climate change or otherwise, may disrupt manufacturing or other operations. For example, our Milpitas operations are located near major earthquake fault lines in California. We cannot provide any assurance that alternate means of conducting our operations (whether through alternate production capacity or service providers or otherwise) would be available if a major disruption were to occur or that, if such alternate means were available, they could be obtained on favorable terms.

Our business may also be affected by public health issues (for example, an outbreak of a contagious disease such as COVID-19, avian influenza, measles or Ebola). The effects of the public health crisis caused by the COVID-19 pandemic and the resulting economic impact have affected, and may continue to affect, our operations and those of our suppliers, third-party service providers, and customers. The extent to which the economic effects of the COVID-19 pandemic could continue to impact our business, results of operations, and financial conditions is difficult to predict and depends on numerous evolving factors including any future resurgences of the pandemic and the intensity and duration of any resulting adverse macroeconomic conditions. The COVID-19 pandemic exposed our business, results of operations, and financial condition to the following adverse impacts: disruptions to our supply chain in connection with the sourcing of materials, support, and services; disruption of operations due to unavailability of employees as a result of illness, travel restrictions and other factors; and a decrease in demand for our products; Additional sustained or prolonged outbreaks of COVID-19, or any ongoing, worsening or recurring supply chain disruptions or macroeconomic effects of the pandemic could have a material adverse effect on our business, results of operations, legal exposure, or financial condition and may also heighten many of the other risks described in this “Risk Factors” section.

There may also be conflict or uncertainty in the countries in which we operate, including safety issues, disruptions of service from utilities, nuclear power plant accidents or general economic or political unrest, including war, civil unrest or terrorist attacks. We have no material operations in Russia, Belarus, Ukraine, or Israel. Consequently, to date, our operations have not been materially adversely affected by Russia’s invasion of Ukraine, or the Israel-Hamas conflict. However, if the Russia-Ukraine or Israel-Hamas conflicts escalate further and/or the U.S. or other jurisdictions impose additional sanctions on the governments or entities involved, this could result in disruptions to the global economy and/or supply chains that could adversely affect our business.

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We may face difficulties in staffing and managing foreign branch operations due to political tensions or cultural differences.

During periods of tension between the governments of the United States and certain other countries, it is often difficult for U.S. companies such as ours to staff and manage operations in such countries. Language and other cultural differences may also inhibit our sales and marketing efforts and create internal communication problems among our U.S. and foreign research and development teams, increasing the difficulty of managing multiple remote locations performing various development, quality assurance, and yield ramp analysis projects.

Currency fluctuations may impact our international sales or expose us to exchange rate risk.

A substantial portion of our international sales are denominated in U.S. dollars. As a result, if the dollar rises in value in relation to foreign currencies, our systems will become more expensive to customers outside the United States and may be less competitive with systems produced by competitors outside the United States. These conditions could negatively impact our international sales. Foreign sales also expose us to collection risk in the event it becomes more expensive for our foreign customers to convert their local currencies into U.S. dollars. Additionally, in the event a larger portion of our revenue becomes denominated in foreign currencies, we would be subject to a potentially significant exchange rate risk, and any failure to sufficiently hedge or otherwise manage these risks could materially and adversely affect our financial condition, results of operations, and liquidity.

We are subject to the Foreign Corrupt Practices Act of 1977, as amended (the “FCPA”), and other laws that prohibit improper payments or offers of payments to foreign governments and their officials and political parties by U.S. persons and issuers as defined by the statute, for the purpose of obtaining or retaining business. Also, similar worldwide anti-bribery laws, such as the U.K. Bribery Act and Chinese anti-corruption laws, generally prohibit companies and their intermediaries from making improper payments to non-U.S. officials for the purpose of obtaining or retaining business. Some of our distribution partners are located in parts of the world that have experienced governmental corruption to some degree and, in certain circumstances, strict compliance with anti-bribery laws may conflict with local customs and practices. The policies and procedures we have implemented to discourage these practices by our employees, our existing safeguards and any future improvements may prove to be ineffective, and our employees, consultants, sales agents or distributors may engage in conduct for which we might be held responsible. Violations of the FCPA or international anti-corruption laws may result in severe criminal or civil sanctions, and we may be subject to other liabilities, which could negatively affect our business, operating results and financial condition. In addition, the U.S. government may seek to hold us liable for successor liability FCPA violations committed by companies in which we invest or that we acquire. We cannot assure you that our internal control policies and procedures will protect us from reckless or negligent acts committed by our employees, distributors, partners, consultants or agents.

Risks Related to Laws, Legal Proceedings, Financial Markets and the Environment

Changes in tax rates or tax liabilities could affect results.

As a global company, we are subject to taxation in the United States and various other countries. Significant judgment is required to determine and estimate worldwide tax liabilities. Our future annual and quarterly tax rates could be affected by numerous factors, including changes in the (1) applicable tax laws; (2) composition of earnings in countries with differing tax rates; or (3) recoverability of our deferred tax assets and liabilities. Beginning in 2022, the U.S. Tax Cuts and Jobs Act of 2017 (“TCJA”) eliminated the existing option to deduct research and development expenditures and requires taxpayers to amortize them over five years pursuant to IRC Section 174. Although Congress is considering legislation that would defer the amortization requirement to later years, we have no assurance that the provision will be repealed or otherwise modified. The requirement reduced our cash flows for 2022 and 2023, and may continue to reduce our cash flows unless repealed. In addition, recent proposals to increase the U.S. corporate income tax rate, increase U.S. taxation of international business operations and impose a global minimum tax could have a negative impact on our tax position depending upon the terms of the final enacted legislation. Based on the nature of the uncertainties around specific legislation to be enacted, we have not quantified the impact of this risk. Many countries and organizations such as the Organization for Economic Cooperation and Development are also actively considering changes to existing tax laws or have proposed or enacted new laws that could increase our tax obligations in countries

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where we do business or cause us to change the way we operate our business. Any of these developments or changes in federal, state, or international tax laws or tax rulings could adversely affect our effective tax rate and our results of operations.

In addition, we are subject to regular examination of our income tax returns by the Internal Revenue Service and other tax authorities. We regularly assess the likelihood of favorable or unfavorable outcomes resulting from these examinations to determine the adequacy of our provision for income taxes. Although we believe our tax estimates are reasonable, there can be no assurance that any final determination will not be materially different from the treatment reflected in our historical income tax provisions and accruals, which could materially and adversely affect our results of operations.

In December 2021, the Organization for Economic Co-operation and Development (“OECD”), released guidance covering various topics, including country-by-country reporting, definitional changes to permanent establishment and Base Erosion and Profit Shifting (“BEPS”), an initiative that aims to standardize and modernize global tax policy. The proposed guidance also established a global minimum tax of 15%. Depending on the final form of guidance adopted by OECD members and legislation ultimately enacted, if any, there may be significant consequences for us due to our international business activities, including, but not limited to, an increase in our tax uncertainty and adverse effects on our provision for income taxes.

In the past, global credit markets and the financial services industry have experienced periods of turmoil and upheaval characterized by the tightening of the credit markets, the weakening of the global economy and an unprecedented level of intervention from the United States and other governments. Adverse economic conditions, such as sustained periods of economic uncertainty or a crisis in the financial markets may have a material adverse effect on our liquidity and financial condition if our ability to obtain credit from the capital financial markets, or from trade creditors was impaired. If banks and financial institutions with whom we have banking relationships enter receivership or become insolvent in the future, we may be unable to access, and we may lose, some or all of our existing cash, cash equivalents and investments to the extent those funds are not insured or otherwise protected by the FDIC. In addition, a worsening economy or an economic crisis could also adversely impact our customers’ ability to finance the purchase of systems from us or our suppliers’ ability to provide us with product, either of which may negatively impact our business and results of operations.

Some of our operations use substances regulated under various federal, state, local, and international laws governing the environment, including those relating to the storage, use, discharge, disposal, labeling, and human exposure to hazardous and toxic materials. We could incur costs, fines and civil or criminal sanctions, third-party property damage or personal injury claims, or could be required to incur substantial investigation or remediation costs, if we were to violate or become liable under environmental laws. Liability under environmental laws can be joint and several and without regard to comparative fault. Compliance with current or future environmental laws and regulations could restrict our ability to expand our facilities or require us to acquire additional expensive equipment, modify our manufacturing processes, or incur other significant expenses. For example, we are or expect to become subject to various new or proposed climate-related and other sustainability laws and regulations, including, for example, the state of California’s new climate change disclosure requirements, the EU’s new Corporate Sustainability Reporting Directive and proposed climate-change disclosure requirements from the SEC. Compliance with such laws and regulations, as well as the overall increased focus and scrutiny from the SEC and other regulators, investors, customers, vendors, employees, and other stakeholders concerning environmental, social and governance (“ESG”) and climate matters, could impose additional costs on us. We may unintentionally violate environmental laws or regulations in the future as a result of human error, equipment failure or other causes. In addition to the potential adverse effects on our business operations of such an event, we are committed to maintaining safe working conditions for our employees and sourcing, manufacturing, and distributing our products in a responsible and environmentally friendly manner, and any failure on our part to do so may cause reputational harm for the Company.

Legal proceedings, claims and investigations may expose us to increased costs and may negatively affect our business and results of operations.

We have been from time to time, and in the future may be, involved in legal proceedings or claims regarding any number of matters, including intellectual property infringement, contract disputes, trade compliance, antitrust, environmental regulations, privacy and data protection, securities, product performance, product liability, employment and workplace safety, and other matters. In addition, we may receive, and have received, inquiries, warrants, subpoenas, and other requests for information in connection with government investigations of potential or suspected violations of law by our company and/or other companies

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that we work with. We have also received, and may receive in the future, claims from customers who believe we owe them product warranty protection, indemnification or other obligations.

Legal proceedings, claims, and government investigations, whether with or without merit, may be time-consuming and expensive to respond to and defend. They may also divert management’s attention and our other resources from day-to-day operational matters; constrain our ability to sell products and services; result in adverse judgments for damages, injunctive relief, penalties and fines; and negatively affect our business and results of operations. We cannot predict the outcome of current or future legal proceedings, claims or investigations.

Risks Related to Growth and Acquisitions

Our success depends on our ability to continually enhance and broaden our product offerings in response to customer-anticipated process changes, strategic opportunities for growth, and industry technology trends. To this end, we have, from time to time, engaged in the process of identifying, analyzing and negotiating possible acquisition transactions, and, from time to time, acquiring one or more businesses, and we expect to continue to do so in the future. We may choose to acquire new and complementary businesses, products, technologies and/or services instead of developing them ourselves. We may, however, face competition for acquisition targets from larger and more established companies with greater financial resources, making it more difficult for us to complete acquisitions. We cannot provide any assurance that we will be successful in consummating future acquisitions on favorable terms or that we will realize the benefits that we anticipate from one or more acquisitions that we consummate. Integrating any business, product, technology or service into our current operations could be expensive and time-consuming and/or disrupt our ongoing business. Further, there are numerous risks associated with acquisitions and potential acquisitions, including, but not limited to:

•

diversion of management’s attention from day-to-day operational matters and current products and customers;

•

lack of synergy or the inability to successfully integrate the new business or to realize expected synergies;

•

integration of acquired businesses and their operations, including enterprise resource planning systems, may be costly and time-consuming and divert resources away from other projects;

•

failure to commercialize the new technology or business;

•

failure to meet the expected performance of the new technology or business;

•

failure to retain key employees and customer or supplier relationships;

•

lower-than-expected market opportunities or market acceptance of any new products; and

•

unexpected reduction of sales of existing products as a result of the introduction of new products.

Our inability to consummate one or more acquisitions on favorable terms, or our failure to realize the intended benefits from one or more acquisitions, could have a material adverse effect on our business, liquidity, financial position and/or results of operations, including as a result of our incurrence of indebtedness and related interest expense and our assumption of unforeseen contingent liabilities. We might need to raise additional funds through public or private equity or debt financings to finance any acquisition. In that event, we could be forced to obtain financing on terms that are not favorable to us and, in the case of equity financing, that result in dilution to our stockholders. In addition, any impairment of goodwill or other intangible assets, amortization of intangible assets, write-down of other assets or charges resulting from the costs of acquisitions and purchase accounting could harm our business and operating results.

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If we cannot effectively manage growth, our business may suffer.

Over the long-term, we intend to grow our business by increasing our sales efforts and completing strategic acquisitions. To effectively manage growth, we must, among other things:

•

engage, train and manage a larger sales force and additional service personnel;

•

expand the geographic coverage of our sales force;

•

expand our information systems;

•

identify and successfully integrate acquired businesses into our operations; and

•

administer appropriate financial and administrative control procedures.

Growth of our business will likely challenge our management, financial, operational, technical, sales, administrative, and other resources. Any failure to effectively manage our growth may cause our business to suffer and our stock price to decline.

Risks Related to the Global Economy and the Semiconductor Industry

Cyclicality in the semiconductor device industry has led to substantial decreases in demand for our systems in the past and may, from time to time, continue to do so.

Our operating results are subject to significant variation due to global economic conditions and the cyclical nature of the semiconductor device industry. Our business depends upon the capital expenditures of semiconductor device manufacturers, which, in turn, depend upon the current and anticipated market demand for semiconductors and products using semiconductors. The timing, length and severity of the up-and-down cycles in the semiconductor equipment industry are difficult to predict. In recent history, the industry has experienced significant downturns, generally in connection with declines in economic conditions. This cyclical nature of the industry in which we operate affects our ability to accurately predict future revenue and, thus, future expense levels. When cyclical fluctuations result in lower-than-expected revenue levels, operating results may be adversely affected, and cost reduction measures may be necessary in order for us to remain competitive and financially sound. During a down cycle, we must be in a position to adjust our cost and expense structure to prevailing market conditions and to continue to motivate and retain our key employees. In addition, during periods of rapid growth, we must be able to increase manufacturing capacity and personnel to meet customer demand. We can provide no assurance that these objectives can be met in a timely manner in response to industry cycles, and we cannot predict when and to what extent sales may normalize, or when and to what extent gross margins may improve, following any such occurrence. If we fail to respond to industry cycles, our business could be seriously harmed.

We may also experience supplier or customer issues as a result of adverse macroeconomic conditions. If our customers have difficulties in obtaining capital or financing, this could result in lower sales. Customers with liquidity issues could also result in an increase in bad debt expense. These conditions could also affect our key suppliers, which could affect their ability to supply parts and result in delays of our customer shipments.

Our future rate of growth is highly dependent on the development and growth of the market for microelectronic device inspection, lithography and metrology equipment.

We target our products to address the needs of microelectronic device manufacturers for defect inspection, metrology and lithography. If for any reason the market for microelectronic device inspection, lithography or metrology equipment fails to grow in the long term, we may be unable to maintain current revenue levels in the short term and maintain our historical growth in the long term. Growth in the inspection market is dependent to a large extent upon microelectronic manufacturers replacing manual inspection with automated inspection technology. Growth in the metrology market is dependent to a large extent upon new chip designs and capacity expansion of microelectronic manufacturers. Growth in the lithography market is dependent on the development of cost-effective packaging with high fine pitch RDLs, ultimately migrating to multi-die, large, form-factor packages. There can be no assurance that manufacturers will undertake these actions at the rate we expect.

General Risk Factors

Provisions of our charter documents and of Delaware law could discourage potential acquisition proposals and/or delay, deter or prevent a change in control of our company.

Provisions of our certificate of incorporation and by-laws may inhibit changes in control of our company not approved by our Board of Directors. These provisions also limit the circumstances in which a premium can be paid for our common stock and in which a proxy contest for control of our board may be initiated. These provisions provide for:

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•

a prohibition on stockholder actions through written consent;

•

a requirement that special meetings of stockholders be called only by the chairperson of our Board of Directors or majority of our directors;

•

advance notice requirements for stockholder proposals and director nominations by stockholders;

•

the authority of our Board of Directors to issue, without stockholder approval, preferred stock with such terms as the Board may determine; and

•

the authority of our board, without stockholder approval, to adopt a stockholder rights plan.

We are also entitled to avail ourselves of the protections of Section 203 of the Delaware General Corporation Law, which could inhibit changes in control of the Company.

Our stock price is volatile.

The market price of our common stock has fluctuated widely. Consequently, the current market price of our common stock may not be indicative of future market prices, and we may be unable to sustain or increase the value of an investment in our common stock. Factors affecting our stock price may include:

•

variations in operating results from quarter to quarter;

•

changes in earnings estimates by analysts or our failure to meet analysts’ expectations;

•

changes in the market price per share of our public company customers;

•

market conditions in the semiconductor and other industries into which we sell products;

•

general economic conditions;

•

political changes or uncertainties, including as a result of the upcoming U.S. presidential election, hostilities or natural disasters such as hurricanes and floods;

•

the impact of infectious disease pandemics on the global economy and on our customers, suppliers, employees, and business;

•

low trading volume of our common stock; and

•

the number of firms making a market in our common stock.

In addition, the stock market has experienced periods of significant price and volume fluctuations. These fluctuations have particularly affected the market prices of the securities of high technology companies like ours. Any such market fluctuations in the future could adversely affect the market price of our common stock.

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

In February 2024, the Onto Innovation Board of Directors approved a new share repurchase authorization, which allows the Company to repurchase up to $200 million worth of shares of its common stock. There were no repurchases of common stock under this authorization during the three and nine months ended September 28, 2024. There was $200 million available for future share repurchases under this share repurchase authorization at September 28, 2024. For further information, see Note 15, “Share Repurchase Authorization,” of the Notes to the Condensed Consolidated Financial Statements.

In addition to our share repurchase program, we withhold common stock shares associated with net share settlements to cover tax withholding obligations upon the vesting of restricted stock unit awards under the Company’s equity incentive program. During the three and nine months ended September 28, 2024, we withheld 2 thousand and 99 thousand shares through net share settlements. For the three and nine months ended September 28, 2024, net share settlements cost $0.5 million and $18.4 million, respectively. Please refer to Note 9, “Share-Based Compensation,” of the Notes to the Condensed Consolidated Financial Statements for further discussion regarding our equity incentive plan.

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The following table provides details of common stock purchased during the three months ended September 28, 2024 (in thousands, except per share data):


Period	Total Number of Shares Purchased (1)		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Program		Maximum Approximate Dollar Value of Shares that May Yet be Purchased Under the Program
June 30, 2024 - July 29, 2024		1	$	207.39		—	$	200,000
July 29, 2024 - August 29, 2024		—	$	—		—	$	200,000
August 29, 2024 - September 28,2024		1	$	201.80		—	$	200,000
Three months ended September 28, 2024		2	$	201.82		—

1 Includes shares withheld through net share settlements.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

None.

Item 5. Other Information

Rule 10b5-1 Plan Elections

During the fiscal quarter ended September 28, 2024, the following officers, as defined in Rule 16a-1(f) under the Exchange Act, as amended, adopted a “Rule 10b5-1 trading arrangement” as defined in Regulation S-K Item 408, as follows:

On August 16, 2024, Mark R. Slicer, the Company’s Chief Financial Officer, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 1,100 shares of our common stock. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until August 15, 2025, or earlier if all transactions under the trading arrangement are completed.

On August 26, 2024, Michael P. Plisinski, the Company’s Chief Executive Officer, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 152,267 shares of our common stock. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until December 31, 2025, or earlier if all transactions under the trading arrangement are completed.

On September 11, 2024, Srinivas Vedula, the Company’s Senior Vice President of Customer Success, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of (i) up to 827 shares of our common stock and (ii) up to 100% of the shares of our common stock issued upon the settlement of 1,847 outstanding RSUs, less the number of shares traded to cover tax withholding obligations in connection with the vesting and settlement of such RSUs. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until September 11, 2025, or earlier if all transactions under the trading arrangement are completed.

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Item 6. Exhibits


Exhibit No.	Description

3.1	Amended and Restated Certificate of Incorporation of Onto Innovation Inc., dated October 25, 2019, incorporated by reference to Exhibit 3.2 to the Company’s Form 8-K filed with the SEC on October 28, 2019 (File No. 001-39110).

3.2	Amended and Restated Bylaws of Onto Innovation Inc., dated January 22, 2020, incorporated by reference to Exhibit 3.1 to the Company’s Form 8-K filed with the SEC on January 27, 2020 (File No. 001-39110).

31.1*	Rule 13a-14(a) Certification of Chief Executive Officer of the Registrant pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

31.2*	Rule 13a-14(a) Certification of Chief Financial Officer of the Registrant pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.1**	Certification of the Chief Executive Officer pursuant to 18 U.S.C Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.2**	Certification of the Chief Financial Officer pursuant to 18 U.S.C Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

101.INS*	Inline 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*	Inline XBRL Taxonomy Extension Schema With Embedded Linkbase Documents

104*	Cover Page Interactive Data File (formatted as Inline XBRL and included in Exhibit 101)

* Filed herewith.

** Furnished herewith.

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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.


		Onto Innovation Inc.

Date:	October 31, 2024	By:	/s/ Michael P. Plisinski
		Michael P. Plisinski
		Chief Executive Officer

Date:	October 31, 2024	By:	/s/ Mark R. Slicer
		Mark R. Slicer
		Chief Financial Officer and Principal Accounting Officer

Exhibit 31.1

Rule 13a-14(a) Certification of Chief Executive Officer
Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Michael P. Plisinski, certify that:

I have reviewed this quarterly report on Form 10-Q of Onto Innovation Inc.;

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;

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;

The registrant’s other certifying officer 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:

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;

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;

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

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

The registrant’s other certifying officer 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):

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

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: October 31, 2024




		By:	/s/ Michael P. Plisinski
			Michael P. Plisinski
			Chief Executive Officer

Exhibit 31.2

Rule 13a-14(a) Certification of Chief Financial Officer
Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Mark R. Slicer, certify that:

I have reviewed this quarterly report on Form 10-Q of Onto Innovation Inc.;

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: October 31, 2024




		By:	/s/ Mark R. Slicer
			Mark R. Slicer
			Chief Financial Officer

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Michael P. Plisinski, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Onto Innovation Inc. on Form 10-Q for the period ended September 28, 2024 fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in the Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Onto Innovation Inc.

Date: October 31, 2024




		By:	/s/ Michael P. Plisinski
			Michael P. Plisinski
			Chief Executive Officer

Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Mark R. Slicer, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Onto Innovation Inc. on Form 10-Q for the period ended September 28, 2024 fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in the Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Onto Innovation Inc.

Date: October 31, 2024




		By:	/s/ Mark R. Slicer
			Mark R. Slicer
			Chief Financial Officer

Document and Entity Information Document - shares	9 Months Ended
Document and Entity Information Document - shares	Sep. 28, 2024	Oct. 15, 2024
Cover [Abstract]
Entity Registrant Name	ONTO INNOVATION INC.
Trading Symbol	ONTO
Entity Central Index Key	0000704532
Current Fiscal Year End Date	--12-28
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 28, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Amendment Flag	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Entity Shell Company	false
Title of 12(b) Security	Common Stock, $0.001 par value per share
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		49,391,299
Entity File Number	001-39110
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-2276314
Entity Address, Address Line One	16 Jonspin Road
Entity Address, City or Town	Wilmington
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01887
City Area Code	978
Local Phone Number	253-6200

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Income Statement [Abstract]
Revenue	$ 252,210	$ 207,185	$ 723,382	$ 597,012
Cost of revenue	115,831	100,333	340,482	284,724
Gross profit	136,379	106,852	382,900	312,288
Operating expenses:
Research and development	28,277	26,136	81,876	80,421
Sales and marketing	19,451	14,755	56,746	46,416
General and administrative	22,465	18,131	60,298	56,130
Amortization	13,114	13,824	39,338	41,473
Total operating expenses	83,307	72,846	238,258	224,440
Operating income	53,072	34,006	144,642	87,848
Interest income, net	8,667	5,694	24,524	13,900
Other expense, net	(724)	(1,001)	10	(2,992)
Income before provision for income taxes	61,015	38,699	169,176	98,756
Provision for income taxes	7,964	2,813	16,323	7,906
Net Income, Total	$ 53,051	$ 35,886	$ 152,853	$ 90,850
Earnings per share:
Basic	$ 1.07	$ 0.73	$ 3.1	$ 1.86
Diluted	$ 1.07	$ 0.73	$ 3.08	$ 1.84
Weighted average shares outstanding:
Basic	49,426	49,043	49,333	48,933
Diluted	49,694	49,401	49,669	49,259

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net Income	$ 53,051	$ 35,886	$ 152,853	$ 90,850
Other comprehensive loss, net of tax:
Change in net unrealized gains (losses) on available-for-sale marketable securities	2,162	672	1,304	1,901
Change in currency translation adjustments	4,859	(2,761)	270	(4,669)
Total other comprehensive loss, net of tax	7,021	(2,089)	1,574	(2,768)
Total comprehensive income	$ 60,072	$ 33,797	$ 154,427	$ 88,082

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Current Assets:
Cash and cash equivalents	$ 188,738	$ 233,508
Marketable securities	666,666	464,303
Accounts receivable, less allowance of $2,613 and $2,659	253,716	226,556
Inventories, net	308,304	327,773
Prepaid expenses and other current assets	40,524	31,127
Total current assets	1,457,948	1,283,267
Property, plant and equipment, net	120,090	103,611
Goodwill	315,811	315,811
Identifiable intangible assets, net	128,086	167,375
Deferred income taxes	34,760	18,836
Other assets	16,670	20,812
Total assets	2,073,365	1,909,712
Current liabilities:
Accounts payable	47,986	49,869
Accrued liabilities	43,590	42,062
Deferred revenue	26,769	24,763
Other current liabilities	26,391	31,032
Total current liabilities	144,736	147,726
Other non-current liabilities	25,104	25,451
Total liabilities	169,840	173,177
Commitments and contingencies
Stockholders’ equity:
Common stock	49	49
Additional paid-in capital	1,274,592	1,262,029
Accumulated other comprehensive loss	(6,325)	(7,899)
Retained earnings	635,209	482,356
Total stockholders’ equity	1,903,525	1,736,535
Total liabilities and stockholders’ equity	$ 2,073,365	$ 1,909,712

Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Statement of Financial Position [Abstract]
Allowances for doubtful accounts	$ 2,613	$ 2,659

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net income	$ 152,853	$ 90,850
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Amortization of intangibles	39,338	41,473
Depreciation	10,818	9,018
Share-based compensation	21,826	19,913
Provision for inventory valuation	5,925	6,111
Deferred income taxes	(15,951)	(21,193)
Other, net	(97)	3,005
Changes in operating assets and liabilities, net of effects of business acquired	(25,035)	(38,790)
Net cash and cash equivalents provided by operating activities	189,677	110,387
Cash flows from investing activities:
Purchases of marketable securities	(538,132)	(360,273)
Proceeds from maturities and sales of marketable securities	342,958	314,124
Purchases of property, plant and equipment	(27,277)	(20,110)
Net cash and cash equivalents used in investing activities	(222,451)	(66,259)
Cash flows from financing activities:
Purchases and retirement of common stock	0	(3,197)
Tax payments related to shares withheld for share-based compensation plans	(18,441)	(10,367)
Payment for Contingent Consideration Liability, Financing Activities	737	803
Issuance of shares through share-based compensation plans	9,178	5,285
Net cash and cash equivalents used in financing activities	(10,000)	(9,082)
Effect of exchange rate changes on cash and cash equivalents	(1,996)	(4,333)
Net increase (decrease) in cash and cash equivalents	(44,770)	30,713
Cash and cash equivalents at beginning of period	233,508	175,872
Cash and cash equivalents at end of period	188,738	206,585
Supplemental disclosure of cash flow information:
Income taxes paid (net of refunds)	$ 30,232	$ 28,935

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]
Balance - Beginning Balance at Dec. 31, 2022	$ 1,596,426	$ 49	$ 1,243,631	$ (10,010)	$ 362,756
Balance, Shares - Beginning Balance at Dec. 31, 2022		48,684
Net Income	29,068				29,068
Share-based compensation	6,119		6,119
Issuance of shares through share-based compensation plans, Shares		225
Purchases of common stock	3,197		1,638		1,559
Purchases of common stock (in shares)		46
Share-based compensation plan withholdings	6,273		6,273
Share-based compensation plan withholdings, Shares		62
Currency translation	1,090			1,090
Unrealized gain (loss) on investments	(1,392)			(1,392)
Balance - Ending Balance at Apr. 01, 2023	1,624,625	$ 49	1,241,839	(7,528)	390,265
Balance, shares - Ending Balance at Apr. 01, 2023		48,801
Balance - Beginning Balance at Dec. 31, 2022	1,596,426	$ 49	1,243,631	(10,010)	362,756
Balance, Shares - Beginning Balance at Dec. 31, 2022		48,684
Net Income	90,850
Currency translation	(4,669)
Balance - Ending Balance at Sep. 30, 2023	1,696,142	$ 49	1,256,824	(12,778)	452,047
Balance, shares - Ending Balance at Sep. 30, 2023		49,078
Balance - Beginning Balance at Apr. 01, 2023	1,624,625	$ 49	1,241,839	(7,528)	390,265
Balance, Shares - Beginning Balance at Apr. 01, 2023		48,801
Net Income	25,896				25,896
Share-based compensation	7,745		7,745
Issuance of shares through share-based compensation plans	5,285		5,285
Issuance of shares through share-based compensation plans, Shares		227
Share-based compensation plan withholdings	3,676		3,676
Share-based compensation plan withholdings, Shares		56
Currency translation	(2,998)			(2,998)
Unrealized gain (loss) on investments	(163)			(163)
Balance - Ending Balance at Jul. 01, 2023	1,656,714	$ 49	1,251,193	(10,689)	416,161
Balance, shares - Ending Balance at Jul. 01, 2023		48,972
Net Income	35,886				35,886
Share-based compensation	6,049		6,049
Issuance of shares through share-based compensation plans, Shares		109
Share-based compensation plan withholdings	418		418
Share-based compensation plan withholdings, Shares		3
Currency translation	(2,761)			(2,761)
Unrealized gain (loss) on investments	672			672
Balance - Ending Balance at Sep. 30, 2023	1,696,142	$ 49	1,256,824	(12,778)	452,047
Balance, shares - Ending Balance at Sep. 30, 2023		49,078
Balance - Beginning Balance at Dec. 30, 2023	1,736,535	$ 49	1,262,029	(7,899)	482,356
Balance, Shares - Beginning Balance at Dec. 30, 2023		49,086
Net Income	46,853				46,853
Share-based compensation	6,486		6,486
Issuance of shares through share-based compensation plans	4,015		4,015
Issuance of shares through share-based compensation plans, Shares		169
Share-based compensation plan withholdings	9,088		9,088
Share-based compensation plan withholdings, Shares		53
Currency translation	(2,593)			(2,593)
Unrealized gain (loss) on investments	(657)			(657)
Balance - Ending Balance at Mar. 30, 2024	1,781,551	$ 49	1,263,442	(11,149)	529,209
Balance, shares - Ending Balance at Mar. 30, 2024		49,202
Balance - Beginning Balance at Dec. 30, 2023	1,736,535	$ 49	1,262,029	(7,899)	482,356
Balance, Shares - Beginning Balance at Dec. 30, 2023		49,086
Net Income	$ 152,853
Purchases of common stock (in shares)	0
Currency translation	$ 270
Balance - Ending Balance at Sep. 28, 2024	1,903,525	$ 49	1,274,592	(6,325)	635,209
Balance, shares - Ending Balance at Sep. 28, 2024		49,390
Balance - Beginning Balance at Mar. 30, 2024	1,781,551	$ 49	1,263,442	(11,149)	529,209
Balance, Shares - Beginning Balance at Mar. 30, 2024		49,202
Net Income	52,949				52,949
Share-based compensation	8,244		8,244
Issuance of shares through share-based compensation plans, Shares		181
Share-based compensation plan withholdings	8,871		8,871
Share-based compensation plan withholdings, Shares		44
Currency translation	(1,996)			(1,996)
Unrealized gain (loss) on investments	(201)			(201)
Balance - Ending Balance at Jun. 29, 2024	1,831,676	$ 49	1,262,815	(13,346)	582,158
Balance, shares - Ending Balance at Jun. 29, 2024		49,339
Net Income	53,051				53,051
Share-based compensation	7,096		7,096
Issuance of shares through share-based compensation plans	5,163		5,163
Issuance of shares through share-based compensation plans, Shares		53
Share-based compensation plan withholdings	482		482
Share-based compensation plan withholdings, Shares		2
Currency translation	4,859			4,859
Unrealized gain (loss) on investments	2,162			2,162
Balance - Ending Balance at Sep. 28, 2024	$ 1,903,525	$ 49	$ 1,274,592	$ (6,325)	$ 635,209
Balance, shares - Ending Balance at Sep. 28, 2024		49,390

Basis of Presentation

9 Months Ended

Sep. 28, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

NOTE 1. Basis of Presentation

Use of Estimates

Adoption of Accounting Standards

Recently Adopted or Effective

Updates Not Yet Effective

Fair Value Measurements

9 Months Ended

Sep. 28, 2024

Fair Value Disclosures [Abstract]

Fair Value Measurements

NOTE 2. Fair Value Measurements

Fair Value of Financial Instruments

Fair Value Hierarchy

The following tables provide the assets and liabilities carried at fair value measured on a recurring basis at September 28, 2024 and December 30, 2023:


	Fair Value Measurements Using Significant Other Observable Inputs (Level 2)
	September 28, 2024		December 30, 2023
Assets:
Available-for-sale debt securities:
Government notes and bonds	$	287,509	$	195,800
Certificates of deposit		75,435		67,467
Commercial paper		157,915		99,635
Corporate bonds		145,807		101,401
Total assets	$	666,666	$	464,303
Liabilities:
Foreign currency forward contracts	$	605	$	1,370
Total liabilities	$	605	$	1,370

See Note 3 for additional discussion regarding the fair value of the Company’s marketable securities.

Marketable Securities

9 Months Ended

Sep. 28, 2024

Marketable Securities [Abstract]

Marketable Securities

NOTE 3. Marketable Securities

At September 28, 2024 and December 30, 2023, marketable securities are categorized as follows:


	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
September 28, 2024
Government notes and bonds	$	286,447	$	1,064	$	2	$	287,509
Certificates of deposit		75,320		115		—		75,435
Commercial paper		157,641		278		4		157,915
Corporate bonds		145,028		788		9		145,807
Total marketable securities	$	664,436	$	2,245	$	15	$	666,666
December 30, 2023
Government notes and bonds	$	195,733	$	393	$	326	$	195,800
Certificates of deposit		67,377		93		3		67,467
Commercial paper		99,591		54		10		99,635
Corporate bonds		101,146		391		136		101,401
Total marketable securities	$	463,847	$	931	$	475	$	464,303


	September 28, 2024				December 30, 2023
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	481,132	$	482,238	$	331,136	$	330,937
Due after one through five years		135,329		136,453		132,711		133,366
Due after five through ten years		235		235		—		—
Due after ten years		47,740		47,740		—		—
Total marketable securities	$	664,436	$	666,666	$	463,847	$	464,303


	In Unrealized Loss Position For Less Than 12 Months				In Unrealized Loss Position For Greater Than 12 Months
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
September 28, 2024
Government notes and bonds	$	12,439	$	1	$	1,996	$	1
Certificates of deposit		4,360		—		—		—
Commercial paper		20,624		4		—		—
Corporate bonds		16,930		7		6,700		2
Total	$	54,353	$	12	$	8,696	$	3
December 30, 2023
Government notes and bonds	$	82,776	$	325	$	180	$	1
Certificates of deposit		11,839		3		—		—
Commercial paper		20,121		10		—		—
Corporate bonds		20,268		103		5,999		33
Total	$	135,004	$	441	$	6,179	$	34

See Note 2 for additional discussion regarding the fair value of the Company’s marketable securities.

Derivative Instruments and Hedging Activities

9 Months Ended

Sep. 28, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities

NOTE 4. Derivative Instruments and Hedging Activities

The dollar equivalent of the U.S. dollar forward contracts and related fair values as of September 28, 2024 and December 30, 2023 were as follows:


	September 28, 2024			December 30, 2023
Notional amount	$	53,614		$	51,551
Fair value of liability	$	(605	)	$	(1,370	)

Purchased Intangible Assets

9 Months Ended

Sep. 28, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Purchased Intangible Assets

NOTE 5. Purchased Intangible Assets

Intangible Assets

Purchased intangible assets as of September 28, 2024 and December 30, 2023 are as follows:


	Gross Carrying Amount		Accumulated Amortization		Net
September 28, 2024
Finite-lived intangibles:
Developed technology	$	378,246	$	289,357	$	88,889
Customer and distributor relationships		73,321		38,223		35,098
Trademarks and trade names		14,171		10,072		4,099
Total identifiable intangible assets	$	465,738	$	337,652	$	128,086
December 30, 2023
Finite-lived intangibles:
Developed technology	$	378,197	$	254,350	$	123,847
Customer and distributor relationships		73,321		34,782		38,539
Trademarks and trade names		14,171		9,182		4,989
Total identifiable intangible assets	$	465,689	$	298,314	$	167,375

Assuming no change in the gross carrying value of identifiable intangible assets and estimated lives, future estimated amortization expenses are:


	Expected Amortization
Fiscal Year:	Expense
2024 (remainder)	$	9,849
2025		32,587
2026		31,394
2027		23,173
2028		12,288
2029		5,038
Thereafter		13,757
Total	$	128,086

Balance Sheet Details

9 Months Ended

Sep. 28, 2024

Balance Sheet Detail [Abstract]

Balance Sheet Details

NOTE 6. Balance Sheet Components

Inventories

Inventories, net are comprised of the following:


	September 28, 2024		December 30, 2023
Materials	$	202,934	$	234,471
Work-in-process		81,845		67,816
Finished goods		23,525		25,486
Total inventories, net	$	308,304	$	327,773

Property, Plant and Equipment

Property, plant and equipment, net is comprised of the following:


	September 28, 2024			December 30, 2023
Machinery and equipment	$	83,006		$	69,828
Land and building		46,583			47,889
Computer equipment and software		30,348			17,790
Leasehold improvements		23,902			22,089
Furniture and fixtures		3,985			3,921
		187,824			161,517
Accumulated depreciation		(67,734	)		(57,906	)
Total property, plant and equipment, net	$	120,090		$	103,611

Other assets

Other assets are comprised of the following:


	September 28, 2024		December 30, 2023
Operating lease right-of-use assets	$	15,021	$	18,360
Other		1,649		2,452
Total other assets	$	16,670	$	20,812

Accrued liabilities

Accrued liabilities are comprised of the following:


	September 28, 2024		December 30, 2023
Payroll and related expenses	$	34,050	$	33,052
Warranty		9,483		8,934
Other		57		76
Total accrued liabilities	$	43,590	$	42,062

Other current liabilities

Other current liabilities are comprised of the following:


	September 28, 2024		December 30, 2023
Customer deposits	$	5,951	$	9,972
Current operating lease obligations		5,458		5,494
Income tax payable		4,463		3,210
Accrued professional fees		815		1,751
Other accrued taxes		6,096		3,570
Other		3,608		7,035
Total other current liabilities	$	26,391	$	31,032

Other non-current liabilities

Other non-current liabilities are comprised of the following:


	September 28, 2024		December 30, 2023
Non-current operating lease obligations	$	10,940	$	14,027
Unrecognized tax benefits (including interest)		8,839		7,358
Deferred revenue		3,197		2,462
Other		2,128		1,604
Total other non-current liabilities	$	25,104	$	25,451

Commitments and Contingencies

9 Months Ended

Sep. 28, 2024

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

NOTE 7. Commitments and Contingencies

Intellectual Property Indemnification Obligations

Warranty Reserves

Changes in the Company’s warranty reserves are as follows:


	Nine Months Ended
	September 28,			September 30,
	2024			2023
Balance, beginning of the period	$	9,380		$	11,830
Accruals		8,756			6,670
Usage		(7,998	)		(9,311	)
Balance, end of the period	$	10,138		$	9,189

Warranty reserves are reported in the Condensed Consolidated Balance Sheets under the captions “Accrued liabilities” and “Other non-current liabilities.”

Legal Matters

Line of Credit

Revenue

9 Months Ended

Sep. 28, 2024

Revenue from Contract with Customer [Abstract]

Revenue

NOTE 8. Revenue

The following table represents a disaggregation of revenue by timing of revenue:


	Three Months Ended				Nine Months Ended
	September 28,		September 30,		September 28,		September 30,
	2024		2023		2024		2023
Point-in-time	$	237,935	$	194,375	$	679,517	$	559,074
Over-time		14,275		12,810		43,865		37,938
Total revenue	$	252,210	$	207,185	$	723,382	$	597,012

See Note 14 for additional discussion of the Company’s disaggregated revenue in detail.

Contract Liabilities

Changes in deferred revenue were as follows:


	Three Months Ended						Nine Months Ended
	September 28,			September 30,			September 28,			September 30,
	2024			2023			2024			2023
Balance, beginning of the period	$	31,281		$	27,256		$	27,225		$	33,014
Deferral of revenue		15,926			17,749			50,601			52,039
Recognition of current year deferred revenue		(13,173	)		(13,407	)		(33,416	)		(36,542	)
Recognition of prior period deferred revenue		(4,068	)		(4,867	)		(14,444	)		(21,780	)
Balance, end of the period	$	29,966		$	26,731		$	29,966		$	26,731

Share-Based Compensation

9 Months Ended

Sep. 28, 2024

Share-Based Payment Arrangement [Abstract]

Share-Based Compensation

NOTE 9. Share-Based Compensation

Restricted Stock Unit Activity

A summary of the Company’s restricted stock unit activity with respect to the nine months ended September 28, 2024 is as follows:


	Number of Shares			Weighted Average Grant Date Fair Value
Nonvested at December 30, 2023		584		$	85.41
Granted		163		$	192.34
Vested		(320	)	$	81.12
Forfeited		(13	)	$	98.60
Nonvested at September 28, 2024		414		$	130.34

Other Expense, Net

9 Months Ended

Sep. 28, 2024

Other Income Expense [Abstract]

Other Expense, Net

NOTE 10. Other (Expense) Income, Net

Other (expense) income, net, is comprised of the following:


	Three Months Ended						Nine Months Ended
	September 28,			September 30,			September 28,			September 30,
	2024			2023			2024			2023
Foreign currency exchange losses, net	$	(704	)	$	(1,009	)	$	(115	)	$	(3,116	)
Other		(20	)		8			125			124
Total other (expense) income, net	$	(724	)	$	(1,001	)	$	10		$	(2,992	)

Income Taxes

9 Months Ended

Sep. 28, 2024

Income Tax Disclosure [Abstract]

Income Taxes

NOTE 11. Income Taxes

The following table provides details of income taxes:


	Three Months Ended						Nine Months Ended
	September 28,			September 30,			September 28,			September 30,
	2024			2023			2024			2023
Income before income taxes	$	61,015		$	38,699		$	169,176		$	98,756
Provision for income taxes	$	7,964		$	2,813		$	16,323		$	7,906
Effective tax rate		13	%		7	%		10	%		8	%

Earnings Per Share

9 Months Ended

Sep. 28, 2024

Earnings Per Share [Abstract]

Earnings Per Share

NOTE 12. Earnings Per Share

The Company’s basic and diluted earnings per share amounts are as follows:


	Three Months Ended				Nine Months Ended
	September 28,		September 30,		September 28,		September 30,
	2024		2023		2024		2023
Numerator:
Net income	$	53,051	$	35,886	$	152,853	$	90,850
Denominator:
Basic earnings per share - weighted average shares outstanding		49,426		49,043		49,333		48,933
Effect of potential dilutive securities:
Restricted stock units and employee stock purchase grants - dilutive shares		268		358		336		326
Diluted earnings per share - weighted average shares outstanding		49,694		49,401		49,669		49,259
Earnings per share:
Basic	$	1.07	$	0.73	$	3.10	$	1.86
Diluted	$	1.07	$	0.73	$	3.08	$	1.84

Accumulated Other Comprehensive Income (Loss)

9 Months Ended

Sep. 28, 2024

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income (Loss)

NOTE 13. Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss, net of tax, were as follows:


	Foreign currency translation adjustments			Net unrealized gains on available-for-sale marketable securities			Accumulated other comprehensive loss
Balance at December 30, 2023	$	(8,664	)	$	765		$	(7,899	)
Net current period other comprehensive income		270			1,304			1,574
Balance at September 28, 2024	$	(8,394	)	$	2,069		$	(6,325	)

	Foreign currency translation adjustments			Net unrealized (losses) gains on available-for-sale marketable securities			Accumulated other comprehensive loss
Balance at December 31, 2022	$	(7,115	)	$	(2,895	)	$	(10,010	)
Net current period other comprehensive (loss) income		(4,669	)		1,901			(2,768	)
Balance at September 30, 2023	$	(11,784	)	$	(994	)	$	(12,778	)

For the nine months ended September 28, 2024 and September 30, 2023, tax effects on net income of amounts recorded in other comprehensive income (loss) were $358 and $407, respectively.

Segment Reporting and Geographic Information

9 Months Ended

Sep. 28, 2024

Segment Reporting [Abstract]

Segment Reporting and Geographic Information

NOTE 14. Segment Reporting and Geographic Information

decision maker is the Chief Executive Officer (the “CEO”). The CEO allocates resources and assesses performance of the business and other activities at the reportable segment level.

The following table lists the different sources of revenue:


	Three Months Ended								Nine Months Ended
	September 28,				September 30,				September 28,				September 30,
	2024				2023				2024				2023
Systems and software	$	217,135	86	%	$	169,346	82	%	$	622,400	86	%	$	495,523	83	%
Parts		19,995	8	%		20,100	10	%		56,890	8	%		58,665	10	%
Services		15,080	6	%		17,739	8	%		44,092	6	%		42,824	7	%
Total revenue	$	252,210	100	%	$	207,185	100	%	$	723,382	100	%	$	597,012	100	%


	Three Months Ended				Nine Months Ended
	September 28,		September 30,		September 28,		September 30,
	2024		2023		2024		2023
Revenue from third parties:
South Korea	$	77,014	$	38,892	$	227,958	$	122,205
Taiwan		78,273		28,084		209,006		85,802
China		32,112		29,785		86,222		108,294
United States		21,979		29,805		61,763		103,756
Southeast Asia		15,589		25,060		55,796		68,040
Japan		12,559		32,597		45,172		60,832
Europe		14,684		22,962		37,465		48,083
Total revenue	$	252,210	$	207,185	$	723,382	$	597,012

The following customers accounted for 10% or more of total revenue for the indicated periods:


	Nine Months Ended
	September 28,			September 30,
	2024			2023
Customer A		20	%		11	%
Customer B		19	%		20	%
Customer C		13	%	^
^ The customer accounted for less than 10% of total revenue during the period.

Substantially all of the Company’s long-lived assets are located within the United States of America.

Share Repurchase Authorization	9 Months Ended
Share Repurchase Authorization	Sep. 28, 2024
Share Repurchase Program [Abstract]
Share Repurchase [Text Block]	In February 2024, the Onto Innovation Board of Directors approved a new share repurchase authorization, which allows the Company to repurchase up to $200 million worth of shares of its common stock. Repurchases may be made through both public market and private transactions from time to time. Any amount paid to repurchase the shares in excess of par value, including transaction costs, would be recorded directly as a decrease to additional paid-in capital and accumulated earnings. During the three and nine months ended September 28, 2024, no shares of the Company’s common stock were repurchased under the share repurchase authorization. At September 28, 2024, there was $200 million available for future share repurchases under this share repurchase authorization.

Restructuring

9 Months Ended

Sep. 28, 2024

Restructuring Charges [Abstract]

Restructuring

NOTE 16. Restructuring

Restructuring expenses recorded in the Condensed Consolidated Statements of Operations are as follows:


	Three Months Ended				Nine Months Ended
	September 28,		September 30,		September 28,		September 30,
	2024		2023		2024		2023
Cost of goods sold	$	1,084	$	—	$	2,575	$	2,279
Operating expenses		2,167		—		3,046		3,226
Total restructuring expenses	$	3,251	$	—	$	5,621	$	5,505

Insider Trading Arrangements	9 Months Ended
Insider Trading Arrangements	Sep. 28, 2024
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	Rule 10b5-1 Plan Elections During the fiscal quarter ended September 28, 2024, the following officers, as defined in Rule 16a-1(f) under the Exchange Act, as amended, adopted a “Rule 10b5-1 trading arrangement” as defined in Regulation S-K Item 408, as follows: On August 16, 2024, Mark R. Slicer, the Company’s Chief Financial Officer, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 1,100 shares of our common stock. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until August 15, 2025, or earlier if all transactions under the trading arrangement are completed. On August 26, 2024, Michael P. Plisinski, the Company’s Chief Executive Officer, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 152,267 shares of our common stock. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until December 31, 2025, or earlier if all transactions under the trading arrangement are completed. On September 11, 2024, Srinivas Vedula, the Company’s Senior Vice President of Customer Success, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of (i) up to 827 shares of our common stock and (ii) up to 100% of the shares of our common stock issued upon the settlement of 1,847 outstanding RSUs, less the number of shares traded to cover tax withholding obligations in connection with the vesting and settlement of such RSUs. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until September 11, 2025, or earlier if all transactions under the trading arrangement are completed.
Rule 10b5-1 Arrangement Adopted	false

Basis of Presentation (Policies)	9 Months Ended
Basis of Presentation (Policies)	Sep. 28, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Estimates made by management include excess and obsolete inventory, fair value of assets acquired and liabilities assumed in a business combination, recoverability and useful lives of property, plant and equipment and identifiable intangible assets, recoverability of goodwill, recoverability of deferred tax assets, allowance for credit losses, liabilities for product warranty, share-based payments and liabilities for tax uncertainties. Actual results could differ from those estimates. These estimates and assumptions are based on historical experience and on various other factors which the Company believes to be reasonable under the circumstances. The Company may engage third-party valuation specialists to assist with estimates related to the valuation of financial instruments, assets and stock awards associated with various contractual arrangements. Such estimates often require the selection of appropriate valuation methodologies and significant judgment. Actual results could differ from these estimates under different assumptions or circumstances and such differences could be material.
Adoption of Accounting Standards	Adoption of Accounting Standards Recently Adopted or Effective There have been no recent accounting pronouncements or changes in accounting pronouncements during the three and nine months ended September 28, 2024, as compared to the recent accounting pronouncements described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 30, 2023, that are of significance, or potential significance, to the Company. Updates Not Yet Effective In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures,” which expands disclosures about a public entity’s reportable segments and requires more enhanced information about a reportable segment including information about the reportable segment’s expenses, interim segment profit or loss, and how a public entity’s chief operating decision maker uses reported segment profit or loss information in assessing segment performance and allocating resources. The guidance is effective for financial statements issued for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The Company is required to adopt this standard in fiscal year 2024 for the annual reporting period ending December 28, 2024, with retrospective disclosure of prior periods presented. The Company expects there will be no material impact on its Consolidated Financial Statements from the adoption of ASU 2023-07. In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” which requires public entities to disclose consistent categories and greater disaggregation of information in the rate reconciliation and for income taxes paid. It also includes certain other amendments to improve the effectiveness of income tax disclosures. The guidance is effective for financial statements issued for annual periods beginning after December 15, 2024, with early adoption permitted. The Company is required to adopt this standard prospectively in fiscal year 2025 for the annual reporting period ending December 27, 2025. The Company is currently in the process of evaluating the impact of adoption on its Consolidated Financial Statements.

Fair Value Measurements - (Tables)

9 Months Ended

Sep. 28, 2024

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis

The following tables provide the assets and liabilities carried at fair value measured on a recurring basis at September 28, 2024 and December 30, 2023:


	Fair Value Measurements Using Significant Other Observable Inputs (Level 2)
	September 28, 2024		December 30, 2023
Assets:
Available-for-sale debt securities:
Government notes and bonds	$	287,509	$	195,800
Certificates of deposit		75,435		67,467
Commercial paper		157,915		99,635
Corporate bonds		145,807		101,401
Total assets	$	666,666	$	464,303
Liabilities:
Foreign currency forward contracts	$	605	$	1,370
Total liabilities	$	605	$	1,370

Marketable Securities - (Tables)

9 Months Ended

Sep. 28, 2024

Marketable Securities [Abstract]

Schedule of Marketable Securities by Category

At September 28, 2024 and December 30, 2023, marketable securities are categorized as follows:


	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
September 28, 2024
Government notes and bonds	$	286,447	$	1,064	$	2	$	287,509
Certificates of deposit		75,320		115		—		75,435
Commercial paper		157,641		278		4		157,915
Corporate bonds		145,028		788		9		145,807
Total marketable securities	$	664,436	$	2,245	$	15	$	666,666
December 30, 2023
Government notes and bonds	$	195,733	$	393	$	326	$	195,800
Certificates of deposit		67,377		93		3		67,467
Commercial paper		99,591		54		10		99,635
Corporate bonds		101,146		391		136		101,401
Total marketable securities	$	463,847	$	931	$	475	$	464,303

Schedule of Amortized Cost and Estimated Fair Value of Marketable Securities Classified by Maturity Date


	September 28, 2024				December 30, 2023
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	481,132	$	482,238	$	331,136	$	330,937
Due after one through five years		135,329		136,453		132,711		133,366
Due after five through ten years		235		235		—		—
Due after ten years		47,740		47,740		—		—
Total marketable securities	$	664,436	$	666,666	$	463,847	$	464,303

Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]


	In Unrealized Loss Position For Less Than 12 Months				In Unrealized Loss Position For Greater Than 12 Months
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
September 28, 2024
Government notes and bonds	$	12,439	$	1	$	1,996	$	1
Certificates of deposit		4,360		—		—		—
Commercial paper		20,624		4		—		—
Corporate bonds		16,930		7		6,700		2
Total	$	54,353	$	12	$	8,696	$	3
December 30, 2023
Government notes and bonds	$	82,776	$	325	$	180	$	1
Certificates of deposit		11,839		3		—		—
Commercial paper		20,121		10		—		—
Corporate bonds		20,268		103		5,999		33
Total	$	135,004	$	441	$	6,179	$	34

Derivative Instruments and Hedging Activities (Tables)

9 Months Ended

Sep. 28, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Forward Contracts and Related Fair Values

The dollar equivalent of the U.S. dollar forward contracts and related fair values as of September 28, 2024 and December 30, 2023 were as follows:


	September 28, 2024			December 30, 2023
Notional amount	$	53,614		$	51,551
Fair value of liability	$	(605	)	$	(1,370	)

Purchased Intangible Assets (Tables)

9 Months Ended

Sep. 28, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Purchased Intangible Assets

Intangible Assets

Purchased intangible assets as of September 28, 2024 and December 30, 2023 are as follows:


	Gross Carrying Amount		Accumulated Amortization		Net
September 28, 2024
Finite-lived intangibles:
Developed technology	$	378,246	$	289,357	$	88,889
Customer and distributor relationships		73,321		38,223		35,098
Trademarks and trade names		14,171		10,072		4,099
Total identifiable intangible assets	$	465,738	$	337,652	$	128,086
December 30, 2023
Finite-lived intangibles:
Developed technology	$	378,197	$	254,350	$	123,847
Customer and distributor relationships		73,321		34,782		38,539
Trademarks and trade names		14,171		9,182		4,989
Total identifiable intangible assets	$	465,689	$	298,314	$	167,375

Schedule of Estimated Future Amortization Expenses

Assuming no change in the gross carrying value of identifiable intangible assets and estimated lives, future estimated amortization expenses are:


	Expected Amortization
Fiscal Year:	Expense
2024 (remainder)	$	9,849
2025		32,587
2026		31,394
2027		23,173
2028		12,288
2029		5,038
Thereafter		13,757
Total	$	128,086

Balance Sheet Details (Tables)

9 Months Ended

Sep. 28, 2024

Balance Sheet Detail [Abstract]

Schedule of Inventories

Inventories, net are comprised of the following:


	September 28, 2024		December 30, 2023
Materials	$	202,934	$	234,471
Work-in-process		81,845		67,816
Finished goods		23,525		25,486
Total inventories, net	$	308,304	$	327,773

Schedule of Property, Plant and Equipment, Net

Property, plant and equipment, net is comprised of the following:


	September 28, 2024			December 30, 2023
Machinery and equipment	$	83,006		$	69,828
Land and building		46,583			47,889
Computer equipment and software		30,348			17,790
Leasehold improvements		23,902			22,089
Furniture and fixtures		3,985			3,921
		187,824			161,517
Accumulated depreciation		(67,734	)		(57,906	)
Total property, plant and equipment, net	$	120,090		$	103,611

Schedule of Other Assets

Other assets are comprised of the following:


	September 28, 2024		December 30, 2023
Operating lease right-of-use assets	$	15,021	$	18,360
Other		1,649		2,452
Total other assets	$	16,670	$	20,812

Schedule of Accrued Liabilities

Accrued liabilities are comprised of the following:


	September 28, 2024		December 30, 2023
Payroll and related expenses	$	34,050	$	33,052
Warranty		9,483		8,934
Other		57		76
Total accrued liabilities	$	43,590	$	42,062

Schedule of Other Current Liabilities

Other current liabilities are comprised of the following:


	September 28, 2024		December 30, 2023
Customer deposits	$	5,951	$	9,972
Current operating lease obligations		5,458		5,494
Income tax payable		4,463		3,210
Accrued professional fees		815		1,751
Other accrued taxes		6,096		3,570
Other		3,608		7,035
Total other current liabilities	$	26,391	$	31,032

Schedule of Other Non-Current Liabilities

Other non-current liabilities are comprised of the following:


	September 28, 2024		December 30, 2023
Non-current operating lease obligations	$	10,940	$	14,027
Unrecognized tax benefits (including interest)		8,839		7,358
Deferred revenue		3,197		2,462
Other		2,128		1,604
Total other non-current liabilities	$	25,104	$	25,451

Commitments and Contingencies (Tables)

9 Months Ended

Sep. 28, 2024

Commitments and Contingencies Disclosure [Abstract]

Schedule of Changes in Warranty Reserves

Changes in the Company’s warranty reserves are as follows:


	Nine Months Ended
	September 28,			September 30,
	2024			2023
Balance, beginning of the period	$	9,380		$	11,830
Accruals		8,756			6,670
Usage		(7,998	)		(9,311	)
Balance, end of the period	$	10,138		$	9,189

Revenue (Tables)

9 Months Ended

Sep. 28, 2024

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

The following table represents a disaggregation of revenue by timing of revenue:


	Three Months Ended				Nine Months Ended
	September 28,		September 30,		September 28,		September 30,
	2024		2023		2024		2023
Point-in-time	$	237,935	$	194,375	$	679,517	$	559,074
Over-time		14,275		12,810		43,865		37,938
Total revenue	$	252,210	$	207,185	$	723,382	$	597,012

Schedule of Changes in Deferred Revenue

Changes in deferred revenue were as follows:


	Three Months Ended						Nine Months Ended
	September 28,			September 30,			September 28,			September 30,
	2024			2023			2024			2023
Balance, beginning of the period	$	31,281		$	27,256		$	27,225		$	33,014
Deferral of revenue		15,926			17,749			50,601			52,039
Recognition of current year deferred revenue		(13,173	)		(13,407	)		(33,416	)		(36,542	)
Recognition of prior period deferred revenue		(4,068	)		(4,867	)		(14,444	)		(21,780	)
Balance, end of the period	$	29,966		$	26,731		$	29,966		$	26,731

Share-Based Compensation - (Tables)

9 Months Ended

Sep. 28, 2024

Share-Based Payment Arrangement [Abstract]

Summary of Restricted Stock Unit Activity

A summary of the Company’s restricted stock unit activity with respect to the nine months ended September 28, 2024 is as follows:


	Number of Shares			Weighted Average Grant Date Fair Value
Nonvested at December 30, 2023		584		$	85.41
Granted		163		$	192.34
Vested		(320	)	$	81.12
Forfeited		(13	)	$	98.60
Nonvested at September 28, 2024		414		$	130.34

Other Expense, Net (Tables)

9 Months Ended

Sep. 28, 2024

Other Income Expense [Abstract]

Schedule of Other Expense, Net

Other (expense) income, net, is comprised of the following:


	Three Months Ended						Nine Months Ended
	September 28,			September 30,			September 28,			September 30,
	2024			2023			2024			2023
Foreign currency exchange losses, net	$	(704	)	$	(1,009	)	$	(115	)	$	(3,116	)
Other		(20	)		8			125			124
Total other (expense) income, net	$	(724	)	$	(1,001	)	$	10		$	(2,992	)

Income Taxes - (Tables)

9 Months Ended

Sep. 28, 2024

Income Tax Disclosure [Abstract]

Details of Income Tax

The following table provides details of income taxes:


	Three Months Ended						Nine Months Ended
	September 28,			September 30,			September 28,			September 30,
	2024			2023			2024			2023
Income before income taxes	$	61,015		$	38,699		$	169,176		$	98,756
Provision for income taxes	$	7,964		$	2,813		$	16,323		$	7,906
Effective tax rate		13	%		7	%		10	%		8	%

Earnings Per Share (Tables)

9 Months Ended

Sep. 28, 2024

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Earnings Per Share

The Company’s basic and diluted earnings per share amounts are as follows:


	Three Months Ended				Nine Months Ended
	September 28,		September 30,		September 28,		September 30,
	2024		2023		2024		2023
Numerator:
Net income	$	53,051	$	35,886	$	152,853	$	90,850
Denominator:
Basic earnings per share - weighted average shares outstanding		49,426		49,043		49,333		48,933
Effect of potential dilutive securities:
Restricted stock units and employee stock purchase grants - dilutive shares		268		358		336		326
Diluted earnings per share - weighted average shares outstanding		49,694		49,401		49,669		49,259
Earnings per share:
Basic	$	1.07	$	0.73	$	3.10	$	1.86
Diluted	$	1.07	$	0.73	$	3.08	$	1.84

Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 28, 2024

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Components of Accumulated Other Comprehensive Loss, Net of Tax

The components of accumulated other comprehensive loss, net of tax, were as follows:


	Foreign currency translation adjustments			Net unrealized gains on available-for-sale marketable securities			Accumulated other comprehensive loss
Balance at December 30, 2023	$	(8,664	)	$	765		$	(7,899	)
Net current period other comprehensive income		270			1,304			1,574
Balance at September 28, 2024	$	(8,394	)	$	2,069		$	(6,325	)

	Foreign currency translation adjustments			Net unrealized (losses) gains on available-for-sale marketable securities			Accumulated other comprehensive loss
Balance at December 31, 2022	$	(7,115	)	$	(2,895	)	$	(10,010	)
Net current period other comprehensive (loss) income		(4,669	)		1,901			(2,768	)
Balance at September 30, 2023	$	(11,784	)	$	(994	)	$	(12,778	)

Segment Reporting and Geographic Information - (Tables)

9 Months Ended

Sep. 28, 2024

Segment Reporting [Abstract]

Schedule of Revenue from External Customers by Products and Services

The following table lists the different sources of revenue:


	Three Months Ended								Nine Months Ended
	September 28,				September 30,				September 28,				September 30,
	2024				2023				2024				2023
Systems and software	$	217,135	86	%	$	169,346	82	%	$	622,400	86	%	$	495,523	83	%
Parts		19,995	8	%		20,100	10	%		56,890	8	%		58,665	10	%
Services		15,080	6	%		17,739	8	%		44,092	6	%		42,824	7	%
Total revenue	$	252,210	100	%	$	207,185	100	%	$	723,382	100	%	$	597,012	100	%

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area

For geographical revenue reporting, revenue is attributed to the geographic location to which the product is shipped. Revenue by geographic region is as follows:


	Three Months Ended				Nine Months Ended
	September 28,		September 30,		September 28,		September 30,
	2024		2023		2024		2023
Revenue from third parties:
South Korea	$	77,014	$	38,892	$	227,958	$	122,205
Taiwan		78,273		28,084		209,006		85,802
China		32,112		29,785		86,222		108,294
United States		21,979		29,805		61,763		103,756
Southeast Asia		15,589		25,060		55,796		68,040
Japan		12,559		32,597		45,172		60,832
Europe		14,684		22,962		37,465		48,083
Total revenue	$	252,210	$	207,185	$	723,382	$	597,012

Schedule of Revenue by Major Customer by Reporting Segments

The following customers accounted for 10% or more of total revenue for the indicated periods:


	Nine Months Ended
	September 28,			September 30,
	2024			2023
Customer A		20	%		11	%
Customer B		19	%		20	%
Customer C		13	%	^
^ The customer accounted for less than 10% of total revenue during the period.

Substantially all of the Company’s long-lived assets are located within the United States of America.

Fair Value Measurements - Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale debt securities	$ 666,666	$ 464,303
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	666,666	464,303
Foreign currency forward contracts	605	1,370
Total liabilities	605	1,370
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value, Measurements, Recurring [Member] \| Government notes and bonds [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale debt securities	287,509	195,800
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value, Measurements, Recurring [Member] \| Certificates of deposits [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale debt securities	75,435	67,467
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value, Measurements, Recurring [Member] \| Commercial paper [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale debt securities	157,915	99,635
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value, Measurements, Recurring [Member] \| Corporate bonds [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale debt securities	$ 145,807	$ 101,401

Marketable Securities - Schedule of Marketable Securities by Category (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 664,436	$ 463,847
Gross Unrealized Holding Gains	2,245	931
Gross Unrealized Holding Losses	15	475
Fair Value	666,666	464,303
Government notes and bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	286,447	195,733
Gross Unrealized Holding Gains	1,064	393
Gross Unrealized Holding Losses	2	326
Fair Value	287,509	195,800
Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	75,320	67,377
Gross Unrealized Holding Gains	115	93
Gross Unrealized Holding Losses		3
Fair Value	75,435	67,467
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	157,641	99,591
Gross Unrealized Holding Gains	278	54
Gross Unrealized Holding Losses	4	10
Fair Value	157,915	99,635
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	145,028	101,146
Gross Unrealized Holding Gains	788	391
Gross Unrealized Holding Losses	9	136
Fair Value	$ 145,807	$ 101,401

Marketable Securities - Schedule of Amortized Cost and Estimated Fair Value of Marketable Securities Classified by Maturity Date (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract]
Amortized Cost, Due within one year	$ 481,132	$ 331,136
Amortized Cost, Due after one through five years	135,329	132,711
Amortized Cost, Due after five through ten years	235	0
Amortized Cost, Due after ten years	47,740	0
Amortized Cost	664,436	463,847
Fair Value, Due within one year	482,238	330,937
Fair Value, Due after one through five years	136,453	133,366
Fair Value, Due after five through ten years	235	0
Fair Value, Due after ten years	47,740	0
Fair Value, Total marketable securities	$ 666,666	$ 464,303

Marketable Securities - Summary of Estimated Fair Value and Gross Unrealized Holding Losses of Marketable Securities in Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Schedule of Available-for-sale Securities [Line Items]
In Unrealized Loss Position For Less Than 12 Months, Fair Value	$ 54,353	$ 135,004
In Unrealized Loss Position For Less Than 12 Months, Gross Unrealized Losses	12	441
In Unrealized Loss Position For Greater Than 12 Months, Fair Value	8,696	6,179
In Unrealized Loss Position For Greater Than 12 Months, Gross Unrealized Losses	3	34
Government notes and bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
In Unrealized Loss Position For Less Than 12 Months, Fair Value	12,439	82,776
In Unrealized Loss Position For Less Than 12 Months, Gross Unrealized Losses	1	325
In Unrealized Loss Position For Greater Than 12 Months, Fair Value	1,996	180
In Unrealized Loss Position For Greater Than 12 Months, Gross Unrealized Losses	1	1
Certificates of deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
In Unrealized Loss Position For Less Than 12 Months, Fair Value	4,360	11,839
In Unrealized Loss Position For Less Than 12 Months, Gross Unrealized Losses	0	3
In Unrealized Loss Position For Greater Than 12 Months, Fair Value	0	0
In Unrealized Loss Position For Greater Than 12 Months, Gross Unrealized Losses	0	0
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
In Unrealized Loss Position For Less Than 12 Months, Fair Value	20,624	20,121
In Unrealized Loss Position For Less Than 12 Months, Gross Unrealized Losses	4	10
In Unrealized Loss Position For Greater Than 12 Months, Fair Value	0	0
In Unrealized Loss Position For Greater Than 12 Months, Gross Unrealized Losses	0	0
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
In Unrealized Loss Position For Less Than 12 Months, Fair Value	16,930	20,268
In Unrealized Loss Position For Less Than 12 Months, Gross Unrealized Losses	7	103
In Unrealized Loss Position For Greater Than 12 Months, Fair Value	6,700	5,999
In Unrealized Loss Position For Greater Than 12 Months, Gross Unrealized Losses	$ 2	$ 33

Derivative Instruments and Hedging Activities - Forward Contracts and Related Fair Values (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional amount	$ 53,614	$ 51,551
Fair value of assets (liability)	$ (605)	$ (1,370)

Purchased Intangible Assets - Schedule of Purchased Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Finite Lived Intangible Assets [Line Items]
Finite-lived intangibles assets, Net	$ 128,086
Identifiable intangibles assets, Gross Carrying Amount	465,738	$ 465,689
Identifiable intangibles assets, Accumulated Amortization	337,652	298,314
Identifiable intangibles assets, Net	128,086	167,375
Developed technology [Member]
Finite Lived Intangible Assets [Line Items]
Finite-lived intangibles assets, Gross Carrying Amount	378,246	378,197
Finite-lived intangibles assets, Accumulated Amortization	289,357	254,350
Finite-lived intangibles assets, Net	88,889	123,847
Customer and distributor relationships [Member]
Finite Lived Intangible Assets [Line Items]
Finite-lived intangibles assets, Gross Carrying Amount	73,321	73,321
Finite-lived intangibles assets, Accumulated Amortization	38,223	34,782
Finite-lived intangibles assets, Net	35,098	38,539
Trademarks and trade names [Member]
Finite Lived Intangible Assets [Line Items]
Finite-lived intangibles assets, Gross Carrying Amount	14,171	14,171
Finite-lived intangibles assets, Accumulated Amortization	10,072	9,182
Finite-lived intangibles assets, Net	$ 4,099	$ 4,989

Purchased Intangible Assets - Schedule of Estimated Future Amortization Expenses (Details) $ in Thousands	Sep. 28, 2024 USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2024 (remainder)	$ 9,849
2025	32,587
2026	31,394
2027	23,173
2028	12,288
2029	5,038
Thereafter	13,757
Finite-lived intangibles assets, Net	$ 128,086

Balance Sheet Details - Schedule of Inventories (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Inventory Details [Abstract]
Materials	$ 202,934	$ 234,471
Work-in-process	81,845	67,816
Finished goods	23,525	25,486
Total inventories, net	$ 308,304	$ 327,773

Balance Sheet Details - Schedule of Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 187,824	$ 161,517
Accumulated depreciation and amortization	(67,734)	(57,906)
Total property, plant and equipment, net	120,090	103,611
Land and building [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	46,583	47,889
Machinery and equipment [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	83,006	69,828
Furniture and fixtures [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	3,985	3,921
Computer equipment and software [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	30,348	17,790
Leasehold improvements [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 23,902	$ 22,089

Balance Sheet Details - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Other Assets [Abstract]
Operating lease right-of-use assets	$ 15,021	$ 18,360
Other	1,649	2,452
Total other assets	$ 16,670	$ 20,812

Balance Sheet Details - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Accrued Liabilities, Current [Abstract]
Payroll and related expenses	$ 34,050	$ 33,052
Warranty	9,483	8,934
Other	57	76
Total accrued liabilities	$ 43,590	$ 42,062

Balance Sheet Details - Schedule of Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Other Liabilities, Current [Abstract]
Customer deposits	$ 5,951	$ 9,972
Current operating lease obligations	5,458	5,494
Income tax payable	4,463	3,210
Accrued professional fees	815	1,751
Other accrued taxes	6,096	3,570
Other	3,608	7,035
Total other current liabilities	$ 26,391	$ 31,032

Balance Sheet Details - Schedule of Other Non-Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Other Liabilities, Noncurrent [Abstract]
Non-current operating lease obligations	$ 10,940	$ 14,027
Unrecognized tax benefits (including interest)	$ 8,839	$ 7,358
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Total other non-current liabilities	Total other non-current liabilities
Deferred revenue	$ 3,197	$ 2,462
Other	2,128	1,604
Total other non-current liabilities	$ 25,104	$ 25,451

Commitments and Contingencies - Textual (Details)	9 Months Ended
Commitments and Contingencies - Textual (Details)	Sep. 28, 2024 USD ($)
Commitments And Contingencies [Line Items]
Liabilities recorded for obligations	$ 0
Percentage of maximum borrowing capacity of value of eligible securities	70.00%
Available line of credit	$ 100,000,000
Available interest rate on line of credit	6.60%
Minimum [Member]
Commitments And Contingencies [Line Items]
Warranty period	12 months
Maximum [Member]
Commitments And Contingencies [Line Items]
Warranty period	14 months
Available line of credit	$ 100,000,000

Commitments and Contingencies - Schedule of Changes in Warranty Reserves (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Balance, beginning of the period	$ 9,380	$ 11,830
Accruals	8,756	6,670
Usage	(7,998)	(9,311)
Balance, end of the period	$ 10,138	$ 9,189

Revenue - Schedule of Disaggregation of Revenue by Timing of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Disaggregation Of Revenue [Line Items]
Total revenue	$ 252,210	$ 207,185	$ 723,382	$ 597,012
Transferred at Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	237,935	194,375	679,517	559,074
Transferred Over Time [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 14,275	$ 12,810	$ 43,865	$ 37,938

Revenue - Additional Information (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Revenue from Contract with Customer [Abstract]
Long-term deferred revenue	$ 3,197	$ 2,462

Revenue - Schedule of Changes in Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Deferred Revenue Disclosure [Abstract]
Balance, beginning of the period	$ 31,281	$ 27,256	$ 27,225	$ 33,014
Deferral of revenue	15,926	17,749	50,601	52,039
Revenue Recognized - Current Year	(13,173)	(13,407)	(33,416)	(36,542)
Revenue Recognized - Prior Period	(4,068)	(4,867)	(14,444)	(21,780)
Balance, end of the period	$ 29,966	$ 26,731	$ 29,966	$ 26,731

Share-Based Compensation - Summary of Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs) [Member]	9 Months Ended
	Sep. 28, 2024 $ / shares shares
Activity for RSUs [Roll Forward]
Number of Shares, Beginning balance (in shares) \| shares	584
Number of Shares, Granted (in shares) \| shares	163
Number of Shares, Vested (in shares) \| shares	(320)
Number of Shares, Forfeited (in shares) \| shares	(13)
Number of Shares, Ending balance (in shares) \| shares	414
Weighted Average Grant Date Fair Value for RSUs [Roll Forward]
Weighted Average Grant Date Fair Value, Beginning balance (in dollars per share) \| $ / shares	$ 85.41
Weighted Average Grant Date Fair Value, Granted (in dollars per share) \| $ / shares	192.34
Weighted Average Grant Date Fair Value, Vested (in dollars per share) \| $ / shares	81.12
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share) \| $ / shares	98.6
Weighted Average Grant Date Fair Value, Ending balance (in dollars per share) \| $ / shares	$ 130.34

Share-Based Compensation - Textual (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 28, 2024	Dec. 30, 2023
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of nonvested shares outstanding	414	584
Weighted average grant-date fair value per share	$ 130.34	$ 85.41
Total unrecognized compensation cost related to restricted stock units granted	$ 34,231	$ 26,559
Unrecognized compensation cost related to restricted stock units, weighted average period	1 year 4 months 24 days	1 year 4 months 24 days
Restricted Stock Units, Service-Based RSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of nonvested shares outstanding	332,000
Performance Restricted Stock Units (PRSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of nonvested shares outstanding	82,000
Weighted average grant-date fair value per share	$ 251.51	$ 100.79

Other Expense, Net - Schedule of Other Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Other Income Expense [Abstract]
Foreign currency exchange losses, net	$ (704)	$ (1,009)	$ (115)	$ (3,116)
Other	(20)	8	125	124
Total other expense, net	$ (724)	$ (1,001)	$ 10	$ (2,992)

Income Taxes - Details of Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income before income taxes	$ 61,015	$ 38,699	$ 169,176	$ 98,756
Provision for income taxes	$ 7,964	$ 2,813	$ 16,323	$ 7,906
Effective tax rate	13.00%	7.00%	10.00%	8.00%

Income Taxes - Textual (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Income Tax Disclosure [Abstract]
Deferred tax assets, valuation allowance	$ 13,960	$ 13,960

Earnings Per Share - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 28, 2024	Jun. 29, 2024	Mar. 30, 2024	Sep. 30, 2023	Jul. 01, 2023	Apr. 01, 2023	Sep. 28, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net Income	$ 53,051	$ 52,949	$ 46,853	$ 35,886	$ 25,896	$ 29,068	$ 152,853	$ 90,850
Basic earnings per share - weighted average shares outstanding	49,426			49,043			49,333	48,933
Employee stock options, employee stock purchase grants and restricted stock units - dilutive shares	268			358			336	326
Diluted earnings per share - weighted average shares outstanding	49,694			49,401			49,669	49,259
Earnings per share:
Basic	$ 1.07			$ 0.73			$ 3.1	$ 1.86
Diluted	$ 1.07			$ 0.73			$ 3.08	$ 1.84

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income Loss [Line Items]
Balance - Beginning Balance	$ 1,736,535	$ 1,596,426
Balance - Ending Balance	1,903,525	1,696,142
Accumulated Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance - Beginning Balance	(8,664)	(7,115)
Net current period other comprehensive income	270	(4,669)
Balance - Ending Balance	(8,394)	(11,784)
Accumulated Net Unrealized Losses on Available-for-sale Marketable Securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance - Beginning Balance	765	(2,895)
Net current period other comprehensive income	1,304	1,901
Balance - Ending Balance	2,069	(994)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance - Beginning Balance	(7,899)	(10,010)
Net current period other comprehensive income	(1,574)	(2,768)
Balance - Ending Balance	$ (6,325)	$ (12,778)

Accumulated Other Comprehensive Income (Loss) - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Loss [Abstract]
Tax Effect Marketable Securities	$ 358	$ (407)

Segment Reporting and Geographic Information - Additional Information (Details)	9 Months Ended	12 Months Ended
	Sep. 28, 2024 Customer Segment	Dec. 30, 2023 Customer
Concentration Risk [Line Items]
Number of reportable segments \| Segment	1
Customers Above 10% [Member] \| Customer Concentration Risk [Member] \| Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	43.00%	29.00%
Significant Customer [Member] \| Customer Concentration Risk [Member] \| Accounts Receivable [Member]
Concentration Risk [Line Items]
Number Of Major Customers \| Customer	3	2
Concentration Risk, Percentage	10.00%	10.00%

Segment Reporting and Geographic Information - Schedule of Revenue from External Customers by Products and Services (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Total revenue	$ 252,210	$ 207,185	$ 723,382	$ 597,012
Sales [Member] \| Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Systems and Software [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 217,135	$ 169,346	$ 622,400	$ 495,523
Systems and Software [Member] \| Sales [Member] \| Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	86.00%	82.00%	86.00%	83.00%
Parts Revenue [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 19,995	$ 20,100	$ 56,890	$ 58,665
Parts Revenue [Member] \| Sales [Member] \| Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	8.00%	10.00%	8.00%	10.00%
Service Revenue [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 15,080	$ 17,739	$ 44,092	$ 42,824
Service Revenue [Member] \| Sales [Member] \| Product [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	6.00%	8.00%	6.00%	7.00%

Segment Reporting and Geographic Information - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Total revenue	$ 252,210	$ 207,185	$ 723,382	$ 597,012
South Korea [Member]
Segment Reporting Information [Line Items]
Total revenue	77,014	38,892	227,958	122,205
China [Member]
Segment Reporting Information [Line Items]
Total revenue	32,112	29,785	86,222	108,294
United States [Member]
Segment Reporting Information [Line Items]
Total revenue	21,979	29,805	61,763	103,756
Taiwan [Member]
Segment Reporting Information [Line Items]
Total revenue	78,273	28,084	209,006	85,802
Southeast Asia [Member]
Segment Reporting Information [Line Items]
Total revenue	15,589	25,060	55,796	68,040
Japan [Member]
Segment Reporting Information [Line Items]
Total revenue	12,559	32,597	45,172	60,832
Europe [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 14,684	$ 22,962	$ 37,465	$ 48,083

Segment Reporting and Geographic Information - Schedule of Revenue by Major Customer by Reporting Segments (Details) - Customer Concentration Risk - Sales [Member]	9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023
Customer A
Concentration Risk [Line Items]
Customer concentration risk percentage	20.00%	11.00%
Customer B
Concentration Risk [Line Items]
Customer concentration risk percentage	19.00%	20.00%
Customer C
Concentration Risk [Line Items]
Customer concentration risk percentage	13.00%

Share Repurchase Authorization - Textual (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 28, 2024	Feb. 27, 2024
Share Repurchase Program [Line Items]
Share Repurchase Program, Authorized, Amount		$ 200
Stock Repurchased and Retired During Period, Shares	0
Share Repurchase Program, Remaining Authorized, Amount	$ 200

Disclosure - Restructuring (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Restructuring Charges [Abstract]
Restructuring cost in cost of goods sold	$ 1,084	$ 0	$ 2,575	$ 2,279
RestructuringCost	3,251	0	5,621	5,505
Restructuring costs in operating expenses	$ 2,167	$ 0	$ 3,046	$ 3,226

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