GFOR Graf Acquisition Corp IV

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K/A

(Amendment No. 1)

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

For the fiscal year ended: December 31, 2023

or

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

For the Transition Period from to.

Commission File Number 001-40427

3001 Daimler Street

Santa Ana, CA, 92705

(Address of Principal Executive Offices) (Zip Code)

(949) 396-6830

(Registrant’s Telephone Number, Including Area Code)

Not applicable

(Former Name, Former Address and Former Fiscal Year, if Changed Since Last Report)

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

Securities registered pursuant to section 12(g) of the Act: none.

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐   No ☒.

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐    No ☒.

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

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

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, 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.

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 has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

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

The aggregate market value of the voting and non-voting common equity held by non-affiliates of Graf Acquisition Corp. IV, our predecessor, as of June 30, 2023, the last business day of the registrant’s most recently completed second fiscal quarter, was approximately $62,842,555, based on the closing price on that day of $10.33.

As of April 29, 2024 there were 22,494,671 shares of common stock issued and outstanding, par value $0.0001 per share.

DOCUMENTS INCORPORATED BY REFERENCE

None.

EXPLANATORY NOTE

INTRODUCTORY NOTE

Merger

On September 29, 2023 (the “Closing Date”), NKGen Biotech, Inc. (formerly known as Graf Acquisition Corp. IV (“Graf”)), a Delaware corporation (“NKGen” or the “Company”), consummated its previously announced merger transaction in accordance with the terms and conditions of the Agreement and Plan of Merger, dated as of April 14, 2023 (the “Merger Agreement”), with Austria Merger Sub, Inc., a Delaware corporation and former wholly-owned subsidiary of Graf (“Merger Sub”) and NKGen Operating Biotech, Inc. (formerly known as NKGen Biotech, Inc.), a Delaware corporation (“Legacy NKGen”), whereby such Merger Agreement contemplated Merger Sub merging with and into Legacy NKGen with the separate corporate existence of Merger Sub ceasing and Legacy NKGen becoming a wholly-owned subsidiary of ours at the Closing (as defined below) (the “Merger” and, together with the other transactions contemplated by the Merger Agreement, the “Business Combination”). In connection with the consummation of the Merger on the Closing Date, Graf changed its name from Graf Acquisition Corp. IV to NKGen Biotech, Inc. and Legacy NKGen changed its name from NKGen Biotech, Inc. to NKGen Operating Biotech, Inc. The closing of the Business Combination is herein referred to as “Closing.”

In connection with the Business Combination, Graf filed a registration statement on Form S-4 (File No. 333-271929) (as amended, the “Registration Statement”) with the U.S. Securities and Exchange Commission (the “SEC”). On August 14, 2023, the Registration Statement was declared effective by the SEC and on August 14, 2023, Graf filed a Definitive Proxy Statement/Prospectus, which was amended and supplemented by the Supplement No.1 and Supplement No.2 to the Definitive Proxy Statement/Prospectus dated September 21, 2023 and September 22, 2023, respectively (as amended and supplemented, the “Definitive Proxy Statement/Prospectus”).

As a result of the Merger and upon the Closing, among other things, (i) all outstanding shares of Legacy NKGen common stock as of immediately prior to the Closing, including outstanding Legacy NKGen convertible notes converted into Legacy NKGen common stock immediately prior to the Closing, were exchanged at an exchange ratio of 0.408 (the “Exchange Ratio”) for an aggregate of 15,595,260 shares of our common stock, par value $0.0001 per share (“our common stock” or “NKGen common stock”) and (2) each option to purchase shares of Legacy NKGen common stock, whether vested or unvested, were assumed and converted into an option to purchase shares of our Common Stock (“Assumed Option”), with each Assumed Option subject to the same terms and conditions as were applicable to the original Legacy NKGen option and with the resulting exercise price and number of shares of our Common Stock purchasable based on the Exchange Ratio and other terms contained in the Merger Agreement.

Unless the context otherwise requires, “we,” “us,” “our” and the “Company” refer to our and its consolidated subsidiaries following the Closing and references to “Graf” refer to Graf Acquisition Corp. IV at or prior to the Closing. All references herein to the “NKGen Board” refer to the board of directors of the Company after giving effect to the Business Combination, and all references herein to the “Legacy NKGen Board” refer to the board of directors of the Legacy NKGen prior to the Business Combination.

In connection with the special meeting of stockholders of Graf, held on September 25, 2023, and the Business Combination, the holders of 3,386,528 shares of Graf’s common stock, par value $0.0001 per share, exercised their right to redeem their shares for cash at a redemption price of approximately $10.4415 per share, for an aggregate redemption amount of approximately $35.4 million. Upon the Closing, the Company received approximately $21.9 million in gross proceeds, comprising approximately $1.7 million from the Graf trust account and approximately $20.2 million from the transactions in relation to the Warrant Subscription Agreements and Securities Purchase Agreement (each as defined below). In addition, in accordance with the Private Placement Agreements (as defined below), approximately $32.9 million in funds were deposited into escrow accounts, which were not received by the Company in connection with the Closing of the Business Combination. The escrowed funds may be released to the Company, the investors, or a combination of both as set forth in Note 4, Private Placement, of the consolidated financial statements.

At the Closing, Graf instructed its transfer agent to separate Graf’s public units into their component securities and, as a result, following the Closing, Graf’s public units are no longer tradeable as a separate security and were delisted from The New York Stock Exchange. On the business day following the Closing, there were 21,888,976 issued and outstanding shares of our Common Stock.

The foregoing description of the Merger Agreement is a summary only and is qualified in its entirety by the full text of the Merger Agreement, a copy of which is attached hereto as Exhibit 2.1, which is incorporated herein by reference.

Capitalized terms used in this Amendment but not otherwise defined herein shall have the meanings ascribed to those terms in the Definitive Proxy Statement/Prospectus.

This report contains references to trademarks belonging to other entities, which are the property of their respective holders. We do not intend our use or display of other companies’ trade names or trademarks to imply a relationship with, or endorsement or sponsorship of us by, any other companies.

CERTAIN DEFINED TERMS

"Bail Note” means the $100,000 aggregate principal amount and 24.64% premium amended and restated short term bridge note, dated April 19, 2024, by and between NKGen and Andrew Bail.

“BDW Secured Note” means that $5,000,000 aggregate principal amount secured convertible promissory notes issued to BDW Investments LLC pursuant to the Equity and Business Loan Agreement (as defined below).

“BDW Warrants” means warrants to purchase 1,000,000 shares of NKGen common stock issued to BDW Investments LLC pursuant to the Equity and Business Loan Agreement (as defined below).

“Business Combination” means the transactions contemplated by the Business Combination Agreement.

“Closing” means the closing of the Business Combination.

“Closing Date” means the date of the Closing.

“Charter” means the amended and restated certificate of incorporation of NKGen, filed with the Secretary of State of the State of Delaware on May 20, 2021 and amended on May 20, 2023 and September 29, 2023.

“Equity and Business Loan Agreement” means that Equity and Business Loan Agreement, dated April 5, 2024, by and between NKGen, Legacy NKGen and BDW Investments LLC.

“Exchange Act” means the U.S. Securities Exchange Act of 1934, as amended.

“Forward Purchase Agreements” means those certain forward purchase agreements dated September 22, 2023, September 26, 2023 and September 29, 2023, by and among Graf and certain investors, as amended on April 18, 2024, February 21, 2024, January 19, 2024, January 11, 2024, January 2, 2024 and December 26, 2023.

“GAAP” means U.S. generally accepted accounting principles.

“Graf” means Graf Acquisition Corp. IV, a Delaware corporation (which, after the Closing, became NKGen Biotech, Inc.).

“Graf IPO” means Graf’s initial public offering, consummated on May 25, 2021, through the sale of 17,161,500 Units at $10.00 per Unit.

“Legacy NKGen” means NKGen Operating Biotech, Inc., a Delaware corporation which, pursuant to the Business Combination, became a direct, wholly owned subsidiary of NKGen Biotech, Inc., and unless the context otherwise requires, its consolidated subsidiaries.

“Merger Agreement” means that Agreement and Plan of Merger, dated as of April 14, 2023, by and among Graf, Merger Sub and Legacy NKGen. 

“Meteora Entities” means Meteora Select Trading Opportunities Master, LP, Meteora Capital Partners, LP, and Meteora Strategic Capital, LLC.

“Meteora Note” means that $330,000 aggregate principal amount of the 12% promissory note entered into pursuant to the Meteora SPA (as defined below).

“Meteora SPA” means that Securities Purchase Agreement, March 26, 2024, by and among NKGen and the Meteora Entities and Letter Agreement, dated April 28, 2024, by and among NKGen and the Meteora Entities.

“Meteora Warrants” means warrants to purchase 660,000 shares of NKGen common stock issued to Meteora Entities pursuant to the Meteora SPA.

“Nasdaq” means the Nasdaq Stock Market LLC.

“NKGen” means the Delaware corporation which, prior to consummation of the Business Combination, was known as Graf Acquisition Corp. IV.

“NKGen Board” means the board of directors of NKGen.

“NKGen Bylaws” or “Bylaws” means the amended and restated bylaws to be adopted by NKGen immediately after the Closing.

“NKGen common stock” or “our common stock” means an issued and outstanding share of common stock, par value $0.0001 per share, of NKGen.

“NKGen Options” means options to acquire NKGen common stock.

“NKMAX” means NKMAX Co., Ltd., the largest stockholder of NKGen, a company formed under the laws of the Republic of Korea.

“PIPE Warrants” means the aggregate 10,209,994 Warrants purchased by those warrant subscribers pursuant to the Warrant Subscription Agreements, each of which is exercisable for cash or cashless exercise under certain circumstances in accordance with the respective Warrant Subscription Agreement.

“Private Warrants” means the 4,721,533 Warrants purchased by the Sponsor concurrently with Graf IPO, each of which is exercisable for cash at an exercise price of $11.50 or cashless exercise under certain circumstances for one share of NKGen common stock.

“Public Warrants” means the 3,432,286 warrants included as a component of the units of Graf sold in the Graf IPO, each of which is exercisable, at an exercise price of $11.50, for one share of NKGen common stock, in accordance with its terms.

“Sandia Note” means that $220,000 aggregate principal amount of the 12% promissory note entered into pursuant to the Sandia SPA.

“Sandia SPA” means that Securities Purchase Agreement, April 1, 2024, by and among NKGen and Sandia Investment Management LP and Letter Agreement, dated April 28, 2024, by and among NKGen and Sandia Investment Management LP.

“Sandia Warrants” means warrants to purchase 440,000 shares of NKGen common stock issued to Sandia Investment Management LP pursuant to the Sandia SPA.

“SEC” means the U.S. Securities and Exchange Commission.

“Securities Purchase Agreement” means the securities purchase agreement in relation to the Senior Convertible Notes and 1,000,000 Warrants issued in connection with the Senior Convertible Notes, each of which was exercisable, at an exercise price of $11.50, for one share of NKGen common stock, by and among Graf and NKMAX, dated September 15, 2023.

“Senior Convertible Notes” means the $10,000,000 aggregate principal amount of 5.0% / 8.0% convertible senior notes due 2027 issued to NKMAX in a private placement pursuant to the Securities Purchase Agreement.

“Sponsor” means Graf Acquisition Partners IV LLC, a Delaware limited liability company.

“Warrant Subscription Agreements” means those certain warrant subscription agreements, dated September 26, 2023 and September 27, 2023, by and among Graf and the warrant investors pursuant to, and on the terms and subject to the conditions of which, the warrant investors have collectively subscribed for and agreed to purchase in private placements an aggregate of 10,209,994 shares of common stock at a purchase price of $1.00 per warrant, resulting in an aggregate purchase price of $10,209,994.

“Warrants” means the Private Warrants, the Public Warrants and the Working Capital Warrants.

“Working Capital Note” means the convertible promissory note issued by Graf to the Sponsor with a principal amount up to $1.5 million on May 15, 2023.

“Working Capital Warrants” means the 523,140 Warrants issued upon conversion of the then outstanding amount under the Working Capital Note upon the Closing, each of which is exercisable, for cash at an exercise price of $11.50, for one share of NKGen common stock, or on cashless exercise, in accordance with its terms.

NKGen Biotech, Inc.

FORM 10-K/A

December 31, 2023

INDEX

PART III

Item 10. Directors, Executive Officers and Corporate Governance

Our business and affairs are managed by or under the direction of the NKGen Board, which has four members. The following table sets forth the name, age and position of each of the directors and executive officers as of April 29, 2024.

Executive Officers and Directors

Paul Song, M.D. Dr. Song has served as our Chief Executive Officer and a member of the NKGen Board since September 2023. He has served as Chairperson of the NKGen Board since March 2024. Dr. Song served as Chief Executive Officer and Vice Chairman of Legacy NKGen from December 2022 to September 2023. He served as Chief Medical Officer of NKMAX, a public Korean biotech company that specializes in the development and manufacture of antibodies and proteins, from March 2016 to January 2021. Dr. Song co-founded and served as Chief Executive Officer and director of Fuse Biotherapeutics, Inc., a private immune modulating therapeutics company, from June 2021 to January 2023. Dr. Song has served as a director of PeproMeme Bio, a private CAR-T company, since March 2022. He is currently on the advisory board of the Pritzker School of Molecular Engineering at The University of Chicago and a director of Mercy Corps and Gideon’s Promise. Dr. Song graduated with honors from the University of Chicago and received his M.D. degree from George Washington University. He completed his residency in radiation oncology at The University of Chicago where he served as Chief Resident and did a brachytherapy fellowship at the Institute Gustave Roussy in Villejuif, France. He was also awarded an ASTRO research fellowship in 1995 for his research in radiation inducible gene therapy.

Yong Man Kim, Ph.D. Dr. Kim has served as our Chief Scientific Officer since September 2023. Dr. Kim served as Chief Scientific Officer of Legacy NKGen from January 2020 to September 2023, and a director of Legacy NKGen from November 2021 to September 2023. Dr. Kim has served as the Chief Scientific Officer of NKMAX, a public Korean biotech company that specializes in the development and manufacture of antibodies and proteins, since September 2017, and a director since March 2021. Prior to his professional career, Dr. Kim was a research professor at Wonkwang University School of Medicine. He has been a visiting Fellow for the Genetic Pharmacology Unit in NINDS, the neurobiological branch of the National Institute of Health. He had his Post-Doc. at the Department of Immunology at the Korea Research Institute of Bioscience and Biotechnology. He earned his PhD in Cell Biology from Chungnam National University in Korea.

Pierre Gagnon. Mr. Gagnon has served as our Chief Operating Officer since September 2023. Mr. Gagnon served as our Chief Operating Officer of Legacy NKGen from November 2021 to September 2023. Prior to that, he served as Global Operations Director of NKMAX, a public Korean biotech company specializing in in the development and manufacture of antibodies and proteins, since August 2009, and as a director from March 2013 to June 2019. He has served as director of ATGEN Canada, Inc. since May 2013. Mr. Gagnon earned his B.A. degree in Business Administration from University of Quebec in Canada.

James A. Graf. Mr. Graf has served our Interim Chief Financial Officer since September 2023. Mr. Graf served as the chief executive officer of Graf from its inception in January 2021 through the closing of the Business Combination in September 2023. Mr. Graf has served as an independent director of Catcha Investment Corp. (NYSE: CHAA) since February 2021. Mr. Graf served as the chief executive officer of Graf Industrial Corp., a blank check company, from June 2018 through its business combination with Velodyne Lidar, Inc. in September 2020. Mr. Graf served as a director of Graf Industrial Corp. from June 2018 to September 2019 and served as a director of Velodyne Lidar, Inc. from September 2020 to February 2021. Mr. Graf served as a director of Platinum Eagle Acquisition Corp. from January 2018 through its business combination with Target Logistics Management, LLC and RL Signor Holdings, LLC in March 2019. Mr. Graf served as the vice president, chief financial officer and treasurer of Double Eagle Acquisition Corp. from its inception in June 2015 through its business combination with Williams Scotsman, Inc. in November 2017. He served as vice president, chief financial officer, treasurer and secretary of Silver Eagle Acquisition Corp. from its inception in April 2013 through Silver Eagle’s business combination with Videocon d2h and he served as vice president, chief financial officer, treasurer and secretary of GEE from its inception in February 2011 to its business combination with Row 44, Inc. and Advanced Inflight Alliance AG in January 2013. He was vice chairman of Global Entertainment AG, the German entity holding GEE’s equity in AIA from 2013 to 2014 and special advisor to GEE in 2013. He served as a special advisor to Videocon d2h from 2015 to 2016. From 2008 to 2011 Mr. Graf served as a managing director of TC Capital Ltd., an investment bank, in Singapore. From 2007 to 2008, Mr. Graf was engaged as a consultant to provide financial advisory services to Metro- Goldwyn-Mayer, Inc. In 2001, Mr. Graf founded and became chief executive officer of Praedea Solutions, Inc., an enterprise software company with operations in the United States, Malaysia and Ukraine. The assets of Praedea Solutions, Inc. were sold in 2006 to a Mergent Inc., a wholly-owned subsidiary of Xinhua Finance Ltd. and renamed Mergent Data Technology, Inc., where Mr. Graf continued to serve as Chief Executive Officer from 2006 to 2007. Praedea Solutions Inc. was renamed PSI Capital Inc. and currently serves as an investment holding company for Mr. Graf’s private investments. Mr. Graf continues to be chief executive of PSI Capital Inc. Prior to founding Praedea, Mr. Graf was a managing director at Merrill Lynch, in Singapore from 1998 to 2000 and a consultant to Merrill Lynch in 2001. From 1996 to 1998, Mr. Graf served as a director and then managing director and president of Deutsche Bank’s investment banking entity in Hong Kong, Deutsche Morgan Grenfell (Hong Kong) Ltd. From 1993 to 1996, he was a vice president at Smith Barney in Hong Kong and Los Angeles. From 1987 to 1993, Mr. Graf was an analyst and then associate at Morgan Stanley in New York, Los Angeles, Hong Kong and Singapore. Mr. Graf received a Bachelor of Arts degree from The University of Chicago in 1987.

Non-Employee Directors

The NKGen Board consists of four directors. In addition to Dr. Song, the NKGen’s directors are:

Michael Klowden. Mr. Klowden has served as a member of NKGen Board since September 2023. Mr. Klowden is currently serving as the executive vice chairman of the board of the Milken Institute, a non- profit, nonpartisan think tank. Prior to this position, Mr. Klowden served as the Milken Institute’s chief executive officer for 21 years, during which time the institute enhanced its reputation and its worldwide outreach, its annual global conference became one of the world’s premier business, finance, and policy gatherings, and multiple specialized centers at the institute were created, including the Asia Center, the California Center, FasterCures, the Center for Financial Markets, the Center for the Future of Aging, the Center for Public Health, and the Center for Strategic Philanthropy. Prior to joining the Milken Institute, Mr. Klowden worked as president of Jefferies Group Inc. (“Jefferies”), a global investment bank and institutional securities firm, from 1995 to 2000, where he was responsible for directing the firm’s transition from a trading firm to a full-service investment bank. Prior to joining Jefferies, Mr. Klowden was a senior partner at the international law firm Morgan, Lewis & Bockius LLP from 1978 to 1995, where he served as a member of the firm’s management committee, was managing partner of the Los Angeles office, and national vice chairman of the firm’s business and finance practice. Mr. Klowden received a bachelor’s degree from The University of Chicago, where he has served as a trustee, and a J.D. from Harvard Law School.

Kathleen Scott. Ms. Scott has served as a member of NKGen Board since September 2023. Ms. Scott has been serving as the chief financial officer of ARS Pharmaceuticals, Inc. (“ARS Pharma”) (Nasdaq: SPRY) since February 2022. Prior to joining ARS Pharma, Ms. Scott was the chief financial officer of various life science companies, including Neurana Pharmaceuticals, Inc. from January 2017 to March 2022, Recros Medica, Inc. from August 2014 to April 2021, Adigica Health, Inc. from February 2016 to March 2021 and Clarify Medical, Inc. from August 2014 to December 2016. Ms. Scott serves on the boards of directors of Dermata Therapeutics, Inc. (Nasdaq: DRMA), where she has served since August 2021, the YMCA of San Diego County and Corporate Directors Forum, and previously served as a member of the board of Conatus Pharmaceuticals Inc. from November 2019 to May 2020. Ms. Scott previously served as a partner at RA Capital Advisors LLC, a San Diego private investment bank, providing financial advisory services and completing mergers, acquisitions, divestitures and restructurings for a broad range of corporate clients, from 1994 to 2010. Ms. Scott started her career as an auditor in Arthur Andersen’s San Diego office, focusing on both public and private clients. Ms. Scott holds a bachelor’s degree in economics/ business from the University of California, Los Angeles and is a CPA and CFA charter holder.

Sangwoo Park. Mr. Park has served as a member of the NKGen Board since September 2023. Mr. Park served as Chairperson of the NKGen Board from September 2023 to March 2024. Mr. Park served as Founder and Executive Chairman of Legacy NKGen from May 2019 to September 2023, and a director of Legacy NKGen from December 2017 to September 2023. Mr. Park has served as the Founder and Chairman of NKMAX Co., Ltd., a public Korean biotech company that specializes in the development and manufacture of antibodies and proteins, since January 2002, and Chief Executive Officer since March 31, 2023. He is currently serves as Chairman and Chief Executive Officer of several subsidiaries and affiliates of NKMAX Co. Ltd.: NKMAX Japan Inc. since November 2017, NKMAX H&D Co., Ltd since June 2016, CoAsia Biotech Inc. since April 2016, ATGEN America, Inc. since February 2014, ATGEN Canada, Inc. since September 2013, and ATGEN Japan, Inc. since September 2017. Mr. Park earned his B.A. degree in economics from Korea University, Seoul Korea.

Family Relationships

There are no family relationships among any of our directors or executive officers.

Involvement in Certain Legal Proceedings

No executive officer or director is a party in a legal proceeding adverse to us or any of our subsidiaries or has a material interest adverse to us or any of our subsidiaries. No executive officer or director has been involved in the last ten years in any of the following:

Board Composition

Our business and affairs are organized under the direction of the NKGen Board. The NKGen Board consists of four members. Upon the Closing, each of Sangwoo Park, Paul Song, Michael Klowden, and Kathleen Scott were elected to serve as directors on the NKGen Board. Dr. Song serves as Chair of the NKGen Board. The primary responsibilities of the NKGen Board is to provide oversight, strategic guidance, counseling and direction to our management. The NKGen Board will meet on a regular basis and additionally as required.

In accordance with the terms of our Charter, the NKGen Board is divided into three classes, Class I, Class II and Class III, with, only one class of directors being elected in each year and each class serving a three-year term. There is no cumulative voting with respect to the election of directors, with the result that the holders of more than 50% of the shares voted for the election of directors can elect all of the directors. Messrs. Song and Klowden were appointed to serve as Class II directors, with terms expiring at the Company’s second annual meeting of stockholders following the Closing; and Mr. Park and Ms. Scott were appointed to serve as Class III directors, with terms expiring at the Company’s third annual meeting of stockholders following the Closing of the Business Combination. Alana McNulty was appointed to serve as Class I director, with a term expiring at the Company’s first annual meeting stockholders following the Closing. Following Ms. McNulty’s resignation from the NKGen Board in February 2024, the Company currently does not have a Class I director. We intend to appoint a new director to replace Ms. McNulty at or before our next annual meeting of stockholders.

At each annual meeting of stockholders to be held after the initial classification, the successors to directors whose terms then expire will be elected to serve from the time of election and qualification until the third annual meeting following their election and until their successors are duly elected and qualified, or their earlier resignation, removal, retirement or death. This classification of the NKGen Board may have the effect of delaying or preventing changes in our control or management. Our directors may be removed for cause by the affirmative vote of the holders of at least 66 2/3% of our voting stock.

Director Independence

Based on information provided by each director concerning his or her background, employment and affiliations each of the directors on the NKGen Board, other than Mr. Park and Dr. Song qualifies as independent directors, as defined under Nasdaq’s listing rules (the “Nasdaq listing rules”). As of the date of this Amendment, the Company only has two independent directors, Mr. Klowden and Ms. Scott, and is not in full compliance with Nasdaq Listing Rule 5605(b)(1), which requires that each company listed on Nasdaq maintains a majority independent board. In addition, we are subject to the rules of the SEC and Nasdaq relating to the membership, qualifications and operations of the audit committee, as discussed below.

The Company received a non-compliance notification from Nasdaq on February 13, 2024 related to our failure to maintain a majority independent board. In accordance with Nasdaq Listing Rule 5605(b)(1)(A), the Company has a “cure period” of until the earlier of the Company’s next annual shareholders’ meeting or February 4, 2025, or if the next annual shareholders’ meeting is held before August 2, 2024, then the Company must evidence compliance no later than August 2, 2024. The Company intends to elect one or more independent directors to serve as a member of the NKGen Board and the audit committee during this cure period.

Role of the NKGen Board in Risk Oversight/Risk Committee

One of the key functions of the NKGen Board is informed oversight of our risk management process. The NKGen Board does not have a standing risk management committee, but rather administers this oversight function directly through the NKGen Board as a whole, as well as through various standing committees of the NKGen Board that address risks inherent in their respective areas of oversight. In particular, the NKGen Board is responsible for monitoring and assessing strategic risk exposure and our audit committee has the responsibility to consider and discuss our major financial risk exposures and the steps its management will take to monitor and control such exposures, including guidelines and policies to govern the process by which risk assessment and management is undertaken. The audit committee also monitors compliance with legal and regulatory requirements. Our compensation committee assesses and monitors whether our compensation plans, policies and programs comply with applicable legal and regulatory requirements.

Board Committees

Effective upon the consummation of the Business Combination, the NKGen Board established an audit committee, a compensation committee and a nominating and corporate governance committee. The NKGen Board has adopted a charter for each of these committees, which comply with the applicable requirements of current Nasdaq listing rules. In addition, from time to time, special committees may be established under the direction of the NKGen Board when the board deems it necessary or advisable to address specific issues. We intend to comply with future requirements to the extent they will be applicable to the Company. Copies of the charters for each committee are available on the investor relations portion of our website.

Audit Committee

Our audit committee consists of Kathleen Scott and Michael Klowden. The NKGen Board determined that each of the members of the audit committee satisfies the independence requirements of the Nasdaq listing rules and Rule 10A-3 under the Exchange Act. Each member of the audit committee can read and understand fundamental financial statements in accordance with applicable audit committee requirements. In arriving at this determination, the NKGen Board examined each audit committee member’s scope of experience and the nature of their prior and/or current employment.

Alana McNulty served as a member of the audit committee from her appointment in September 2023 to February 4, 2024, the effective date of her resignation. Due to her resignation, our audit committee is not in compliance with Nasdaq Listing Rule 5605(c)(2)(A), which require at least three independent directors serve on the audit committee. In accordance with Nasdaq Listing Rule 5605(b)(1)(A), we intend to come into compliance with such rule at or before our next annual meeting of stockholders.

Kathleen Scott serves as the chair of the audit committee. The NKGen Board determined that Kathleen Scott qualifies as an audit committee financial expert within the meaning of SEC regulations and meets the financial sophistication requirements of the Nasdaq listing rules. In making this determination, the NKGen Board considered Kathleen Scott’s formal education and previous experience in financial roles. Both our independent registered public accounting firm and management periodically will meet privately with our audit committee.

The functions of this committee include, among other things:

The composition and function of the audit committee complies with all applicable requirements of the Sarbanes-Oxley Act, SEC rules and regulations and the Nasdaq listing rules.

Compensation Committee

NKGen’s compensation committee consists of Kathleen Scott and Michael Klowden. Kathleen Scott serves as the chair of the compensation committee. The NKGen Board determined that each of the members of the compensation committee is a non-employee director, as defined in Rule 16b-3 promulgated under the Exchange Act and satisfies the independence requirements of Nasdaq. The functions of the committee include, among other things:

The composition and function of the compensation committee complies with all applicable requirements of the Sarbanes-Oxley Act, SEC rules and regulations and Nasdaq listing rules.

Nominating and Corporate Governance Committee

Our nominating and corporate governance committee consists of Kathleen Scott and Michael Klowden. Michael Klowden serves as the chair of the nominating and corporate governance committee. The NKGen Board determined that each of the members of our nominating and corporate governance committee satisfies the independence requirements of Nasdaq. The functions of this committee include, among other things:

The composition and function of the nominating and corporate governance committee complies with all applicable requirements of the Sarbanes-Oxley Act, SEC rules and regulations and Nasdaq listing rules.

Compensation Committee Interlocks and Insider Participation

None of the members of our compensation committee has ever been one of our executive officers or employees. None of our executive officers currently serve, or has served during the last completed fiscal year, on the compensation committee or board of directors of any other entity that has one or more executive officers that will serve as a member of the NKGen Board or compensation committee.

Limitation on Liability and Indemnification of Directors and Officers

Our Charter, which became effective upon the Closing of the Business Combination, eliminates the liability of our officer and directors for monetary damages to the fullest extent permitted by applicable law. The DGCL provides that officers and directors of a corporation will not be personally liable for monetary damages for breach of their fiduciary duties, except for liability:

If the DGCL is amended to authorize corporate action further eliminating or limiting the personal liability of officers and directors, then the liability of our officers and directors will be eliminated or limited to the fullest extent permitted by the DGCL, as so amended.

The NKGen Bylaws require us to indemnify and advance expenses to, to the fullest extent permitted by applicable law, its directors, officers and agents. We plan to maintain a directors’ and officers’ insurance policy pursuant to which our directors and officers are insured against liability for actions taken in their capacities as directors and officers. Finally, our Charter prohibits any retroactive changes to the rights or protections or increase the liability of any officer or director in effect at the time of the alleged occurrence of any act or omission to act giving rise to liability or indemnification.

In addition, we entered into separate indemnification agreements with our directors and executive officers. These agreements, among other things, require us to indemnify our directors and executive officers for certain expenses, including attorneys’ fees, judgments, fines and settlement amounts incurred by a director or executive officer in any action or proceeding arising out of their services as one of our directors or executive officers or any other company or enterprise to which the person provides services at our request.

We believe these provisions in our Charter and NKGen Bylaws are necessary to attract and retain qualified persons as directors and officers.

Code of Business Conduct and Ethics for Employees, Executive Officers and Directors

The NKGen Board adopted a Code of Business Conduct and Ethics (the “Code of Conduct”), applicable to all of NKGen’s employees, executive officers and directors. The Code of Conduct is available on NKGen’s website at www.nkgenbiotech.com. Information contained on or accessible through NKGen’s website is not a part of this Amendment, and the inclusion of NKGen’s website address in this Amendment is an inactive textual reference only. The nominating and corporate governance committee of the NKGen Board is responsible for overseeing the Code of Conduct.

Insider Trading Policy

We have adopted an Insider Trading Policy that governs the purchase, sale and/or other dispositions of the Company’s securities by our directors, officers and employees, as well as their immediate family members and entities controlled by them, and that is designed to promote compliance with insider trading laws, rules and regulations.

Non-Employee Director Compensation

As of the date of the Closing, we had three non-employee directors and two employee directors, Dr. Song and Sangwoo Park. Dr. Song does not receive any additional compensation for his per-Closing service on the Legacy NKGen Board or post-Closing service on the NKGen Board. For a description of Dr. Song’s compensation and employment agreement, see the sections titled “Executive Compensation - 2023 Summary Compensation” and “Executive Compensation - Agreements with NEOs”In 2023, Sangwoo Park served as the Executive Chairman of the Legacy NKGen Board pre-Closing and the NKGen Board post-Closing as well as an employee of the Legacy NKGen pre-Closing and NKGen post-Closing. Mr. Park did not receive any additional compensation for his 2023 board service. For additional information on Mr. Park’s compensation as an NKGen employee, please see the section titled “Certain Relationships and Related Party Transactions.”

The NKGen Board expects to review director compensation periodically to ensure that director compensation remains competitive such that NKGen is able to recruit and retain qualified directors. NKGen has developed a non-employee directors’ compensation program that is designed to align compensation with NKGen’s business objectives and the creation of stockholder value, while enabling NKGen to attract, retain, incentivize and reward directors who contribute to the long-term success of NKGen. The details of the program are as follows:

Non-employee directors’ cash fees have been deferred until the Company is able to meet certain funding goals set by the compensation committee of the NKGen Board.

On February 12, 2024, we granted each our non-employee directors, Mr. Klowden and Ms. Scott, an option to purchase 300,000 shares of NKGen common stock, with an exercise price of $1.62. The option vests in equal monthly installments beginning on the vesting commencement date of October 1, 2023, and ending on October 1, 2026, subject to the director’s continued service with NKGen through each applicable vesting date.

Item 11. Executive Compensation

EXECUTIVE COMPENSATION

We are an “emerging growth company,” as defined in the JOBS Act. As an emerging growth company it is exempt from certain requirements related to executive compensation, including the requirements to hold a nonbinding advisory vote on executive compensation and to provide information relating to the ratio of total compensation of its chief executive officer to the median of the annual total compensation of all of its employees, each as required by the Investor Protection and Securities Reform Act of 2010, which is part of the Dodd-Frank Wall Street Reform and Consumer Protection Act.

Executive Compensation

This section provides an overview of NKGen’s executive compensation programs as they relate to the executive officers named below (the “named executive officers”), including a narrative description of the material factors necessary to understand the information disclosed in the summary compensation table below.

The Legacy NKGen Board has historically determined the compensation of Legacy NKGen’s Chief Executive Officer. The Legacy NKGen Chief Executive Officer has historically determined the compensation for executives that report to him, except that all bonus awards and equity awards were approved by the Legacy NKGen Board. Following the Closing, the compensation committee of the NKGen Board and the NKGen Board, as applicable, will determine the compensation of our executive officers. For the year ended December 31, 2023, NKGen’s named executive officers were:

2023 Summary Compensation Table

The following table presents information regarding the compensation awarded by, earned by or paid to our named executive officers during the fiscal years ended December 31, 2023 and December 31, 2022.

Narrative to Summary Compensation Table

Base Salaries

Base salary is paid to attract and retain qualified talent and is set at a level that is commensurate with the executive’s duties and authorities, contributions, prior experience and sustained performance, as well as considering market competitive levels. Below are the changes made in 2023 to our named executive officers base salary rates:

Bonuses

In 2023, Dr. Song and Mr. Gagnon each earned a discretionary bonus of $150,000 (paid on March 30, 2023) and $60,000 (paid on October 20, 2023), respectively. Our other two named executive officers did not receive any bonus payments in 2023.

Benefits Plans

We maintain the NKGen Retirement Savings 401(k) Plan (the “401(k) Plan”) for our U.S.-based employees, including the named executive officers, who satisfy certain eligibility requirements. The 401(k) Plan is intended to qualify as a tax-qualified plan under Section 401(k) of the Code. The named executive officers are eligible to participate in the 401(k) Plan on the same basis as our other employees. The Code allows eligible employees to contribute, on a pre-tax basis, a portion of their salary, within prescribed limits, through contributions to the 401(k) Plan. Contributions are allocated to each participant’s account and are then invested in selected investment alternatives according to each participant’s directions. We do not provide for a discretionary matching contribution.

Equity Compensation

We did not have a formal policy with respect to the grant of equity incentive awards to our executive officers, or any formal equity ownership guidelines applicable to them prior to the Closing. We generally used equity incentive awards to compensate our executive officers in the form of initial grants in connection with the commencement of employment and also at various other times during their employment. Accordingly, the NKGen Board’s practice has been to periodically review the equity incentive compensation of NKGen’s executive officers and from time-to-time grant equity incentive awards to such executives in the form of stock options.

In January and February 2023, the Legacy NKGen Board granted stock option awards to our executive officers, reflected in the Outstanding Equity Awards table below.

Following the Closing, our compensation committee oversees the compensation policies, plans and programs and reviews and determines compensation to be paid to executive officers, directors and other senior management, as appropriate. The compensation policies followed by us are intended to provide for compensation that is sufficient to attract, motivate and retain executives of the Company and potential other individuals and to establish an appropriate relationship between executive compensation and the creation of stockholder value.

Outstanding Equity Awards as of December 31, 2023

The following table provides information regarding outstanding stock options held by our named executive officers as of December 31, 2023.

Equity Incentive Plans

2023 Plan

We established the 2023 Equity Incentive Plan in connection with the Closing in 2023. The purpose of the 2023 Equity Incentive Plan is: (i) to secure and retain the services of employees, non-employee directors and consultants, (ii) to provide incentives for such persons to exert maximum efforts for the success of the Company and any affiliate, and (iii) to provide a means by which such persons may be given an opportunity to benefit from increases in value of the common stock through the granting of awards. The 2023 Equity Incentive Plan provides for the grant of awards in the form of incentive stock options within the meaning of Section 422 of the Code, nonqualified stock options, stock appreciation rights, restricted stock, restricted stock units, performance awards and other forms of awards. A total of 14,341,200 shares of common stock was initially reserved and available for issuance under the 2023 Equity Incentive Plan, plus the number of shares of common stock that are automatically added on January 1st of each year for a period of up to ten years commencing on January 1, 2024 and ending on (and including) January 1, 2033, in an amount equal to (i) 5% of the total number of shares of the Fully Diluted Common Stock (as defined in the 2023 Equity Incentive Plan) determined as of the day prior to such increase, or (ii) such lesser amount determined by the NKGen Board prior to January 1 of a given year.

2019 Plan

Historically we maintained the 2019 Equity Incentive Plan, which allowed us to make equity incentive awards to Legacy NKGen’s employees, directors and consultants. Upon the effective date of the 2023 Equity Incentive Plan, we ceased using the 2019 Equity Incentive Plan for making equity awards. The 2019 Equity Incentive Plan provided for the grant of awards in the form of incentive stock options within the meaning of Section 422 of the Code, nonqualified stock options and restricted stock. A total of 8,723,922 shares of Legacy NKGen common stock was initially reserved and available for issuance under the 2019 Equity Incentive Plan. Awards previously granted under the plan remain subject to its terms.

2023 ESPP

In connection with the Closing, we adopted the 2023 Employee Stock Purchase Plan (“ESPP”), a broad-based benefit plan in which our employees, including our NEOs, may purchase shares of NKGen’s common stock. The ESPP includes an initial share reserve of 1,195,100 shares of common stock issuance pursuant to future grants under the ESPP, plus the number of shares of common stock that are automatically added on January 1st of each year for a period of up to ten years commencing on January 1, 2024 and ending on (and including) January 1, 2033, in an amount equal to the lesser of (i) 2% of the total number of shares of the Fully Diluted Common Stock (as defined in the ESPP) determined as of the day prior to such increase, and (ii) 2,390,200 shares of common stock (equal to 200% of the ESPP’s initial share reserve).

Agreements with NEOs

The Company has entered into agreements with certain NEOs, the material terms of which are summarized below. Each offer letter described below contains confidentiality, at-will employment, and dispute resolution provisions. Capitalized terms appearing in the following descriptions but not defined therein are defined in the applicable agreement. The below summary is qualified in all respects by reference to the underlying agreement.

Paul Song, M.D.. Dr. Song is a party to an offer letter with Legacy NKGen, dated December 26, 2022 (the “Song Offer Letter”), under which he serves as Chief Executive Officer. The Song Offer Letter provides for an annual base salary of $500,000, a target annual bonus opportunity equal to 50% of his annual base salary during the relevant performance period, and the option to purchase 205,000 shares of Legacy NKGen’s common stock (or 83,722 shares of NKGen’s common stock post-Closing) under the 2019 Equity Incentive Plan. Additionally, the letter provides that Dr. Song is entitled to severance payments under certain situations (as described in the Potential Payments Upon Termination or Change in Control section).

Pierre Gagnon. Mr. Gagnon is a party to an offer letter with Legacy NKGen, dated October 15, 2021 (the “Gagnon Offer Letter”), under which he serves as the Chief Operating Officer. The Gagnon Offer Letter provides for an annual base salary of $300,000.

Yong Man Kim.    Dr. Kim is a party to an offer letter with Legacy NKGen, dated December 15, 2019 (the “Kim Offer Letter”), under which he serves as Chief Scientific Officer. The Kim Offer Letter provides for an annual base salary of $60,000 and the opportunity to purchase shares of the Company’s common stock under the Company’s 2019 Equity Incentive Plan.

Jill M. Jene, Ph.D. Dr. Jene is a party to a separation agreement and general release with Legacy NKGen dated August 24, 2023 (the “Jene Separation Agreement”), under which Dr. Jene received a severance payment of $108,000 and $8,000 in reimbursed legal fees. The Jene Separation Agreement included a confidentiality and non-disclosure agreement.

Potential Payments Upon Termination or Change in Control

Other than Dr. Song, our NEOs are generally ineligible for any payments or benefits on a termination for any reason and/or a change in control.

For Dr. Song, under the Song Offer Letter, if his employment is terminated without Cause (as defined in the Song Offer Letter) by the Company, he is entitled to receive the continuation of his then-current base salary for 18 months and up to 12 months of COBRA premiums.

If Dr. Song’s employment is terminated by the Company without Cause or by Dr. Song with Good Reason (as defined in the Song Offer Letter) on or within the 12 months following a Change in Control (as defined in the Song Offer Letter), subject to satisfying certain conditions, Dr. Song would be entitled to (i) a lump-sum cash payment equal to 24 months of his then-current base salary; (ii) payment of a pro rata portion of his annual bonus for the year of termination; (iii) up to 16 months of COBRA premiums; (iv) accelerated vesting and exercisability of all outstanding time-based stock options and other time-based equity awards held by Dr. Song; and (v) an extension of the period of time during which Dr. Song may exercise any vested, outstanding and unexercised stock options then held by Dr. Song until the earlier of (a) the 1-year anniversary of his separation date; (b) the expiration date of the option; or (c) such earlier date as provided or permitted under the applicable equity plan.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholders Matters

Security Ownership of Certain Beneficial Owners and Management

The following table sets forth information known to the Company regarding the actual beneficial ownership of NKGen common stock as of April 29, 2024, after giving effect to the Closing, by:

Beneficial ownership is determined in accordance with SEC rules, which generally provide that a person has beneficial ownership of a security if he, she or it possesses sole or shared voting or investment power with respect to the security. Under SEC rules, beneficial ownership includes securities that the individual or entity has the right to acquire, such as through exercise of stock options or warrants, within 60 days and are deemed to be outstanding and beneficially owned by the persons holding those options or warrants for the purpose of computing the number of shares beneficially owned and the percentage ownership of that person. They are not, however, deemed to be outstanding and beneficially owned for the purpose of computing the percentage ownership of any other person.

The beneficial ownership percentages set forth in the table below are based on 23,494,671 shares of NKGen common stock issued and outstanding as of April 29, 2024. Unless otherwise noted in the footnotes to the following table, and subject to applicable community property laws, the persons and entities named in the table have sole voting and investment power with respect to their beneficially owned NKGen common stock.

Item 13. Certain Relationships and Related Transactions, and Director Independence

Other than the compensation arrangements for our directors and executive officers, which are described in the section of this prospectus entitled “Executive Compensation”, below is a description of transactions since January 1, 2023, to which we were a party or will be a party, in which:

Graf Related Party Transactions 

Founder Shares 

Contemporaneously with the execution of the Merger Agreement, Graf and NKGen entered into an amended and restated Sponsor Support and Lockup Agreement (as defined below). In connection with the amended and restated Sponsor Support and Lockup Agreement, of the 4,290,375 shares of Graf formerly held by Graf’s sponsor and insiders (“Founder Shares”): (i) 1,773,631 shares were forfeited, (ii) 1,173,631 shares became restricted shares subject to vesting conditions (“Deferred Founder Shares”), and (iii) the remaining 1,343,113 shares are subject to trading restrictions for up to two years and continued to be outstanding and fully vested shares.

Deferred Founder Shares do not have voting rights, do not participate in dividends and are not transferrable. During the vesting period of five years from Closing (“Vesting Period”), if the trading price or price per share consideration upon a change in control for Common Stock is greater than or equal to $14.00 at any 20 trading days in a 30 consecutive trading-day period, then 873,631 Deferred Founder Shares will immediately vest; and if greater than or equal to $20.00 at any 20 trading days in a 30 consecutive trading-day period, then an additional 300,000 Deferred Founder Shares will immediately vest. In the event there is a sale of the Company, then immediately prior to the consummation of such sale, the calculated Acquiror Sale Price, as defined in the agreement, will take into account the number of Deferred Founder Shares that will vest upon a change in control. Upon the expiration of the Vesting Period, unvested Founder Shares will be forfeited and cancelled for no consideration.

Private Warrants 

Simultaneously with the closing of the Graf IPO, Graf consummated the private placement of 4,433,333 Private Warrants at a price of $1.50 per Warrant to the Sponsor, generating proceeds of approximately $6.7 million. Graf consummated the second closing of the private placement on June 2, 2021 simultaneously with the closing of the over-allotment, resulting in the sale of an additional 288,200 Private Warrants, generating additional gross proceeds of approximately $432,000. The Private Warrants are identical to the Public Warrants included in the Units sold in the Graf IPO, except that, so long as they are held by their initial purchasers or their permitted transferees, (i) they will not be redeemable by Graf, (ii) they (including the shares of common stock issuable upon exercise of these Private Placement Warrants) could not, subject to certain limited exceptions, be transferred, assigned or sold until 30 days after Graf completed its initial business combination, (iii) they may be exercised by the holders on a cashless basis and (iv) they will be entitled to registration rights.

Working Capital Warrants

In connection with the the amendment of the first amended and restated certificate of incorporation of Graf, to extend the date by which Graf must consummate an initial business combination from May 25, 2023 to September 29, 2023 , on May 15, 2023, Graf issued a Working Capital Note to the Sponsor with a principal amount up to $1,500,000. The Working Capital Note did not bear interest and was repayable in full upon the earlier of (a) the date of the consummation of Graf’s initial business combination, or (b) the date of Graf’s liquidation. If Graf did not consummate an initial business combination by the Liquidation Date, the Working Capital Note would have been repaid only from funds held outside of the Trust Account or would be forfeited, eliminated or otherwise forgiven. Subject to the terms and conditions of the Merger Agreement, upon maturity, the outstanding principal of the Graf Working Capital Note was converted into Working Capital Warrants, at a price of $1.50 per warrant, at the option of the Sponsor. Such Working Capital Warrants have terms identical to the Private Warrants. Any drawdowns in connection with the Working Capital Note were subject to unanimous written consent of the Graf Board and the consent of the Sponsor. In no event could the quantity of warrants issued exceed one million (1,000,000) warrants. At the Closing, the then outstanding principal amount under the Working Capital Note converted into 523,140 Working Capital Warrants of NKGen.

Sponsor Support and Lockup Agreement 

In connection with the execution of the Merger Agreement, Graf entered into a sponsor support and lockup agreement (the “Sponsor Support and Lockup Agreement”) with the Sponsor, Legacy NKGen and certain of Graf’s directors and officers. Pursuant to the Sponsor Support and Lockup Agreement, the Sponsor and Graf’s directors and officers (the “Sponsor Holders”), among other things, agreed to vote all of their shares of capital stock (and any securities convertible or exercisable into capital stock) in favor of the approval of the Business Combination. In addition, the Sponsor Support and Lockup Agreement provides that 2,947,262 of the shares of NKGen common stock held by the Sponsor immediately after the Closing Date became subject to potential forfeiture if certain triggering events are not achieved prior to the fifth anniversary of the Closing Date (the “Earnout Period”). Pursuant to the Sponsor Support Agreement, (i) 1,473,631 of the shares of NKGen common stock held by the Sponsor Holders will only vest if, during the Earnout Period, the volume weighted average price of NKGen common stock equals or exceeds $14.00 for any twenty trading days within a period of thirty consecutive trading days (“Tranche III Founder Shares”) and (ii) 1,473,631 of the shares of NKGen common stock held by the Sponsor Holders will only vest if, during the Earnout Period (the “Tranche IV Founder Shares” and together with the Tranche III Founder Shares, the “Sponsor Earnout Shares”), the volume weighted average price of NKGen common stock equals or exceeds $16.00 for any twenty trading days within a period of thirty consecutive trading days. Any such shares held by the Sponsor Holders that remain unvested after the Earnout Period will be forfeited and cancelled for no consideration. Additionally, if there was a sale during the Earnout Period, such that such third party acquiror offered $14.00 or more to each holder of NKGen common stock, the Tranche III Founder Shares would be deemed vested and if such third party acquiror offered $16.00 or more to each holder of NKGen common stock, the Tranche IV Founder Shares would be deemed vested. The Sponsor also agreed (i) with respect to 631,557 shares of the common stock held by it (which are not the Sponsor Earnout Shares), to lockup such shares for a period from the Closing Date until the earliest of  (A) 12 months after the Closing and (B) the volume weighted average price of the common stock equals or exceeds $14.00 per share (as adjusted for share splits, share dividends, reorganizations and recapitalizations) for any 20 trading days in a 30 consecutive trading day period starting after 180 days following the Closing and (ii) with respect to an additional 631,556 shares of the common stock held by it (which are not the Sponsor Earnout Shares), to lockup such shares for a period from the Closing Date until the earliest of (A) 24 months after the Closing and (B) the volume weighted average price of the common stock equals or exceeds $14.00 per share (as adjusted for share splits, share dividends, reorganizations and recapitalizations) for any 20 trading days in a 30 consecutive trading day period starting after 12 months following the Closing and (ii) with respect to the Sponsor Earnout Shares, to lockup such shares until their applicable vesting and to the extent that such shares become fully vested, a lock-up period until 30 days following the date upon which such shares become fully vested.

On September 21, 2023, Graf, the Sponsor, Legacy NKGen and certain directors of Graf entered into an amended and restated Sponsor Support and Lockup Agreement to clarify that, in the event there is a sale of the post-Business Combination company, then immediately prior to the consummation of such sale, the calculated Acquiror Sale Price (as defined in the A&R Sponsor Support Agreement) will take into account the number of Sponsor Earnout Shares that will vest upon a change in control.

On September 28, 2023, Graf, the Sponsor, Legacy NKGen and certain directors of Graf entered into a second amended and restated Sponsor Support and Lockup Agreement, pursuant to which the Sponsor agreed to forfeit 600,000 shares of the Tranche III Founder Shares at the Closing for no consideration, reducing to 873,631 shares of NKGen common stock, and forfeited 873,631 shares of the Tranche IV Founder Shares at the Closing for no consideration and increased the volume weighted average price threshold for the vesting of Tranche IV Founder Shares from $16.00 to $20.00 per share.

On September 29, 2023, Graf, the Sponsor, Legacy NKGen and certain directors of Graf entered into a third amended and restated Sponsor Support and Lockup Agreement, pursuant to which the Sponsor agreed to forfeit an additional 300,000 shares of the Tranche IV Founder Shares at the Closing for no consideration.

NKGen Related Party Transactions 

Related Party Loan 

On September 5, 2023, we issued an unsecured promissory note in the principal amount of $300,000 to Lisa J. Ling, an immediate family member of NKGen’s chief executive officer, Paul Y. Song (the “September 2023 Promissory Note”). We borrowed the full principal amount of the September 2023 Promissory Note to cover its operational and business expenses. The September 2023 Promissory Note carried an interest rate of 5.12% per annum. As of December 31, 2023, all outstanding amounts under the September 2023 Promissory Note were fully repaid.

Convertible Note Financings 

Legacy NKGen sold convertible promissory notes with an aggregate principal amount of $375,000 to Mary Ling, who is the mother-in-law of our Chief Executive Officer, Paul Y. Song, in November 2019 and May 2023. The total amount owed to Mary Ling as of September 29, 2023 was approximately $0.4 million, which converted into an aggregate of 48,250 shares of NKGen common stock held by Mary Ling at the Closing.

On February 7, 2024, the Company entered into a bridge loan agreement with Mary Ling for $0.4 million with a 20% premium due at maturity. The related party bridge loan matures at the earlier of (i) 60 days from issuance or (ii) upon a financing event with third parties exceeding $5.0 million. In April 2024 the maturity of the bridge loan was amended to be the earliest of (i) 90 days from issuance, (ii) upon a financing event with third parties exceeding $5.0 million, or (iii) the occurrence of any event of default. Mary Ling is also entitled to receive 400,000 warrants to purchase 400,000 shares of the Company’s common stock each at a strike price of $2.00 per share. 

Securities Purchase Agreement

On September 15, 2023, the Company entered into the Securities Purchase Agreement with NKMAX for total proceeds of $10.0 million, pursuant to the Senior Convertible Notes, which closed on September 29, 2023. Interest began accruing at Closing and is payable semi-annually in arrears, with interest that is paid in kind (if applicable) increasing the principal amount outstanding on each interest payment date. The Company currently expects to make their interest payments in-kind in lieu of periodic cash payments. The Senior Convertible Notes are convertible at any time, in whole or in part, at NKMAX’s option at a conversion price of $10.00 per share of common stock (subject to anti-dilution adjustments in the event of stock splits and the like). The Senior Convertible Notes have a put option which may be exercised by NKMAX 2.5 years after the issuance of the Senior Convertible Notes. No less than six months after exercise of the put option, the Company will be required to repay all principal and accrued interest of the Senior Convertible Notes. Should the put option remain unexercised, the outstanding principal and accrued interest will be due and payable on September 29, 2027. Additionally, as described below, together with the Securities Purchase Agreement, the SPA Warrants (as defined below) were issued to NKMAX, and accordingly, a relative fair value allocation was applied and discount was recognized on the Senior Convertible Notes as set forth in Note 9, Fair Value of Financial Instruments of the consolidated financial statements. There are no financial or non-financial covenants associated with the Senior Convertible Notes. During the year ended December 31, 2023, the Company recorded $0.2 million of interest expense and discount amortization related to the Senior Convertible Notes.

In connection with the Securities Purchase Agreement, 1,000,000 warrants were issued to NKMAX at an exercise price of $11.50 per warrant (“SPA Warrants”). The terms of the SPA Warrants are identical to the terms of the Public Warrants with redemption at the sole discretion of the Company if the Company’s stock price equals or exceeds $18.00 per share and other certain conditions are met. 

Loan Agreements 

NKMAX Loan Agreements

Between August 2019 and December 2022, NKGen entered into multiple loan agreements with NKMAX, its former parent company, in an aggregate principal amount of $62.0 million. The loan agreements accrued interest at an annual rate of 4.6%. On December 20, 2022, NKGen and NKMAX entered into a Loan Conversion Agreement. Pursuant to the Loan Conversion Agreement, NKGen issued 17,002,230 shares of its common stock in full satisfaction of the obligations owed by NKGen under the loan agreements, which was approximately $66.1 million of principal and accrued but unpaid interest.

2023 NKMAX Loan Agreements

From January through April 2023, NKGen entered into additional loan agreements with NKMAX for aggregate gross proceeds of $5.0 million. The terms of the loans included a 4.6% interest rate and a maturity date of December 31, 2024.

Consulting Agreements 

On December 15, 2021, we entered into a consulting agreement with Paul Song, M.D. (the “Song Consulting Agreement”). Pursuant to the Song Consulting Agreement, Dr. Song was compensated for his professional clinical program advisory services. During the term of the Song Consulting Agreement, Dr. Song was paid a monthly retainer of $30,000 and a one-time upfront payment of $25,000. The Song Consulting Agreement was terminated effective December 28, 2022 in connection with Dr. Song’s hiring by NKGen as its Chief Executive Officer and full-time employee. For a description of Dr. Song’s compensation and employment agreement, see the sections titled “Executive Compensation - 2023 Summary Compensation” and “Executive Compensation - Agreements with NEOs.”

Purchases of laboratory supplies

For the years ended December 31, 2023 and December 31, 2022, the Company recorded research and development expenses of $0.6 million and $0.1 million, respectively, associated with the purchase of laboratory supplies from NKMAX. As of December 31, 2023 and December 31, 2022, $0.6 million and less than $0.1 million, respectively, remained outstanding relating to the purchase of laboratory supplies from NKMAX, which were recorded to accounts payable and accrued expenses on the consolidated balance sheet.

NKMAX Intercompany License 

On February 12, 2023, we and NKMAX entered into the Intercompany License, which has been amended in October 2021, April 2023 and August 2023. For a description of the Intercompany License, see the section titled “Business - Licensing Agreements - NKMAX License.”

ATGen Canada Services 

Between January 2021 and December 2022, ATGen Canada, Inc., a subsidiary of NKMAX and sister company to NKGen (“ATGen Canada”), provided us with various services relating to NK Vue, NKMAX’s proprietary blood test for the measurement of immune function, including strategic guidance, training, and commercial readiness activities (the “ATGen Services”). In 2021 and 2022, we paid ATGen Canada $158,900 and $68,264, respectively, for the ATGen Services. As of December 31, 2023, we are not party to any contract with ATGen Canada, and have no ongoing obligation to ATGen Services.

NKGen Support Agreements 

In connection with the execution of the Merger Agreement, certain of Legacy NKGen’s stockholders entered into support agreements with Graf and Legacy NKGen, pursuant to which the such Legacy NKGen stockholders each agreed, among other things, to (i) consent to, and vote to approve and adopt, the Merger Agreement and the Business Combination, subject to certain customary exceptions, (ii) waive any dissenters’ or approval rights under applicable law in connection with the Business Combination, and (iii) not transfer, subject to certain permitted exceptions, any of such stockholders’ shares of NKGen capital stock prior to the Closing Date.

Lock-up Agreement 

In connection with the Business Combination, Graf, the Sponsor and certain stockholders of Legacy NKGen entered into lockup agreements pursuant to which such stockholders agreed, subject to certain exceptions, to not transfer any shares of NKGen common stock held by them for a period of 180 days after the Closing. Notwithstanding the foregoing, the lockup with respect to the Lockup Shares held by NKMAX and Sponsor and their respective permitted transferees will end (i) with respect to 50% of their Lockup Shares, the earlier of (x) the date that is 12 months after the Closing Date and (y) the occurrence of the First Early Release Event and (ii) with respect to the remaining 50% of their Lockup Shares, the earlier of (x) the date that is 24 months after the Closing Date and (y) the occurrence of the Second Early Release Event, provided that with respect to NKMAX, such lockup shares shall not apply to any shares of NKGen common stock that may be issued to NKMAX upon conversion of the Senior Convertible Notes or pursuant to exercise of the SPA Warrants held by NKMAX. The Sponsor and its members are subject to a lockup on substantially similar terms pursuant to the terms of a letter Agreement with Graf, dated May 20, 2021.

On September 20, 2023, Graf waived the requirement that certain Legacy NKGen stockholders holding 5% or more of the shares of Legacy NKGen common stock on a fully-diluted basis as of the date of the Merger Agreement (other than NKMAX and certain NKGen directors and officers) enter into the lockup agreements. The waiver effectively released an aggregate of approximately 1,448,304 of the shares of NKGen common stock held by such Legacy NKGen stockholders, which became not subject to lockup restrictions.

Compensation Arrangements and Stock Option Grants for Executive Officers and Directors

We have employment arrangements with our named executive officers. For a description of these agreements, see the section titled “Executive Compensation — Agreements with NEOs.”

We have granted stock options to its executive officers and directors. For a description of certain of these equity awards, see “Executive Compensation — Outstanding Equity Awards as of December 31, 2023.” In addition, the following table provides information regarding outstanding stock options issued to our officers and directors following December 31, 2022.

Sangwoo Park Employment

For the years ended December 31, 2023 and December 31, 2022, Sangwoo Park, a director and stockholder of the Company, received compensation totaling $4,572,379 and $576,000, respectively, for services rendered as an employee of Legacy NKGen pre-Closing and NKGen post-Closing. Mr. Park did not receive additional compensation for his service as a director of the Company in 2022 or 2023. Mr. Park’s compensation for year ended December 31, 2023, consisted of a $443,077 salary and stock options with a grant date fair value of $4,129,302. For year ended December 31, 2022, Mr. Park’s compensation consisted of a $480,000 salary and a bonus of $96,000.

Indemnification Agreements 

Our Charter provides that we will indemnify our directors and officers to the fullest extent permitted by Delaware law, subject to certain exceptions contained in our proposed constitution.

We also entered into indemnification agreements with each of its directors and executive officers. The indemnification agreements provide the indemnitees with contractual rights to indemnification, and expense advancement and reimbursement, to the fullest extent permitted under Delaware law, subject to certain exceptions contained in those agreements.

Related Person Transaction Policy 

Upon the consummation of the Business Combination, the NKGen Board adopted a written related person transactions policy that sets forth our policies and procedures regarding the identification, review, consideration and oversight of “related person transactions.” For purposes of our policy only, a “related person transaction” will be considered a transaction, arrangement or relationship (or any series of similar transactions, arrangements or relationships) in which we or any of our subsidiaries are participants involving an amount that exceeds $120,000 or 1% of our total assets at the end of the applicable fiscal year, in which any “related person” has a material interest.

Transactions involving compensation for services provided to us as an employee, consultant or director will not be considered related person transactions under this policy. A related person is any executive officer, director, nominee to become a director or a holder of more than 5% of any class of our voting securities (including NKGen common stock), including any of their immediate family members and affiliates, including entities owned or controlled by such persons.

Under the policy, the related person in question or, in the case of transactions with an entity holding more than 5% of any class of our voting securities, an officer with knowledge of a proposed transaction, must present information regarding the proposed related person transaction to our audit committee (or, where review by our audit committee would be inappropriate, to another independent body of the NKGen Board) for review. To identify related person transactions in advance, we will rely on information supplied by our executive officers, directors and certain significant stockholders. In considering related person transactions, our audit committee will take into account the relevant available facts and circumstances, which may include, but are not limited to:

Director Independence

Based on information provided by each director concerning his or her background, employment and affiliations each of the directors on the NKGen Board, other than Mr. Park and Dr. Song qualifies as independent directors, as defined under Nasdaq’s listing rules. As of the date of this Amendment, the Company only has two independent directors, Mr. Klowden and Ms. Scott, and is not in full compliance with Nasdaq Listing Rule 5605(b)(1), which requires that each company listed on Nasdaq maintains a majority independent board. In addition, we are subject to the rules of the SEC and Nasdaq relating to the membership, qualifications and operations of the audit committee, as discussed below.

The Company received a non-compliance notification from Nasdaq on February 13, 2024, related to our failure to maintain a majority independent board. In accordance with Nasdaq Listing Rule 5605(b)(1)(A), the Company has a “cure period” of until the earlier of the Company’s next annual shareholders’ meeting or February 4, 2025, or if the next annual shareholders’ meeting is held before August 2, 2024, then the Company must evidence compliance no later than August 2, 2024. The Company intends to elect one or more independent directors to serve as a member of the NKGen Board and the audit committee during this cure period.

Item 14. Principle Accountant Fees and Services

The following table represents aggregate fees billed or to be billed to the Company for the fiscal years ended December 31, 2023 and 2022 by Ernst & Young LLP, our independent registered public accounting firm.

All fees described above for year ended December 31, 2023, were pre-approved by our audit committee. All fees described above for year ended December 31, 2022, were pre-approved by the audit committee of the Legacy NKGen Board.

PRE-APPROVAL POLICIES AND PROCEDURES

The audit committee’s policy is to pre-approve all audit and permissible non-audit services rendered by Ernst &Young LLP, our independent registered public accounting firm. The audit committee pre-approves specified services in defined categories of audit services, audit-related services and tax services up to specified amounts, as part of the audit committee’s approval of the scope of the engagement of Ernst & Young or on an individual case-by-case basis before Ernst & Young is engaged to provide a service. The audit committee has determined that the rendering of the services other than audit services by Ernst & Young is compatible with maintaining the principal accountant’s independence.

PART IV

Item 15. Exhibits and Financial Statements.