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The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote."}],"balance_after":243,"source":{"system":"sec-edgar","filing":"0001209191-23-057369","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1862622/000120919123057369/doc4.xml","form_type":"4"}},{"id":1731461,"issuer":{"id":79017,"kind":"organization","name":"NKGen Biotech, Inc.","symbol":"NKGN"},"owners":[{"id":36423,"kind":"person","name":"Graf James A","position":1,"cik":"0001519672","reported_name":"Graf James A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CFO"}},{"id":84772,"kind":"organization","name":"Graf Acquisition Partners IV LLC","position":2,"cik":"0001862622","reported_name":"Graf Acquisition Partners IV LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-11-22T17:55:20.000Z","date":"2023-11-21","kind":"purchase","planned":false,"acquired":true,"shares":13,"price":2.915,"value":37.895,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.895 to $2.98, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote."}],"balance_after":23,"source":{"system":"sec-edgar","filing":"0001209191-23-056524","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1862622/000120919123056524/doc4.xml","form_type":"4"}},{"id":1731460,"issuer":{"id":79017,"kind":"organization","name":"NKGen Biotech, Inc.","symbol":"NKGN"},"owners":[{"id":36423,"kind":"person","name":"Graf James A","position":1,"cik":"0001519672","reported_name":"Graf James A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CFO"}},{"id":84772,"kind":"organization","name":"Graf Acquisition Partners IV LLC","position":2,"cik":"0001862622","reported_name":"Graf Acquisition Partners IV LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-11-22T17:55:20.000Z","date":"2023-11-20","kind":"purchase","planned":false,"acquired":true,"shares":10,"price":2.94,"value":29.4,"ownership":{"direct":true},"balance_after":10,"source":{"system":"sec-edgar","filing":"0001209191-23-056524","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1862622/000120919123056524/doc4.xml","form_type":"4"}},{"id":1765499,"issuer":{"id":79017,"kind":"organization","name":"NKGen Biotech, Inc.","symbol":"NKGN"},"owners":[{"id":84772,"kind":"organization","name":"Graf Acquisition Partners IV LLC","position":1,"cik":"0001862622","reported_name":"Graf Acquisition Partners IV LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":36423,"kind":"person","name":"Graf James A","position":2,"cik":"0001519672","reported_name":"Graf James A","relationship":{"director":false,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Interim CFO"}}],"security":"Working Capital Warrants","published_at":"2023-10-04T06:10:09.000Z","date":"2023-09-29","kind":"grant","planned":false,"acquired":true,"shares":523140,"price":1.5,"value":784710.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"The Working Capital Warrants were issued to the Sponsor concurrently with the Closing pursuant to a working capital note between the Sponsor and the Issuer."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Sponsor is the record holder of the securities reported herein. 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Mr. Graf has voting and investment discretion with respect to the securities held of record by the Sponsor."}],"balance_after":5244673,"derivative":{"exercise_price":11.5,"exercise_date":"2023-10-29","expiration_date":"2028-09-29","underlying":"Common Stock","underlying_shares":523140},"source":{"system":"sec-edgar","filing":"0001104659-23-106578","document":"tm2327629-1_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1862622/000110465923106578/tm2327629-1_4.xml","form_type":"4"}},{"id":1765498,"issuer":{"id":79017,"kind":"organization","name":"NKGen Biotech, Inc.","symbol":"NKGN"},"owners":[{"id":84772,"kind":"organization","name":"Graf Acquisition Partners IV LLC","position":1,"cik":"0001862622","reported_name":"Graf Acquisition Partners IV LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":36423,"kind":"person","name":"Graf James A","position":2,"cik":"0001519672","reported_name":"Graf James A","relationship":{"director":false,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Interim CFO"}}],"security":"Private Placement Warrants","published_at":"2023-10-04T06:10:09.000Z","date":"2023-09-29","kind":"grant","planned":false,"acquired":true,"shares":4721533,"price":1.5,"value":7082299.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The Private Placement Warrants are reported as acquired for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the \"Exchange Act\"), concurrent with the Closing, because, pursuant to their terms, their exercise was not within the control of the Reporting Persons until the Closing. The Private Placement Warrants were initially acquired in a private placement from the Issuer concurrent with Issuer's initial public offering."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Sponsor is the record holder of the securities reported herein. James A. Graf is the managing member of the Sponsor. 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(f/k/a Graf Acquisition Corp. IV, the \"Issuer\") held by it back to the Issuer for no consideration in connection with the closing of the Issuer's business combination transaction (the \"Closing\")."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Sponsor is the record holder of the securities reported herein. James A. Graf is the managing member of the Sponsor. Mr. Graf has voting and investment discretion with respect to the securities held of record by the Sponsor."}],"balance_after":2436744,"source":{"system":"sec-edgar","filing":"0001104659-23-106578","document":"tm2327629-1_4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1862622/000110465923106578/tm2327629-1_4.xml","form_type":"4"}},{"id":2634158,"issuer":{"id":79017,"kind":"organization","name":"NKGen Biotech, Inc.","symbol":"NKGN"},"owners":[{"id":84772,"kind":"organization","name":"Graf Acquisition Partners IV LLC","position":1,"cik":"0001862622","reported_name":"Graf Acquisition Partners IV LLC","relationship":{"director":false,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}},{"id":36423,"kind":"person","name":"Graf James A","position":2,"cik":"0001519672","reported_name":"Graf James A","relationship":{"director":false,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2021-07-14T16:54:01.000Z","date":"2021-07-14","kind":"other","acquired":false,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On July 14, 2021, Graf Acquisition Partners IV LLC (the \"Sponsor\") transferred 20,000 shares of common stock of the Issuer to Alexandra Lebenthal for $0.006 per share, the initial purchase price paid by the Sponsor for its shares of common stock."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Sponsor is the record holder of the securities reported herein. James A. Graf is the managing member of the Sponsor. Mr. Graf has voting and investment discretion with respect to the securities held of record by the Sponsor."}],"balance_after":4210375,"source":{"system":"sec-edgar","filing":"0001104659-21-092153","document":"tm2122153-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1862622/000110465921092153/tm2122153-2_4seq1.xml","form_type":"4"}},{"id":2686997,"issuer":{"id":79017,"kind":"organization","name":"NKGen Biotech, Inc.","symbol":"NKGN"},"owners":[{"id":84772,"kind":"organization","name":"Graf Acquisition Partners IV LLC","position":1,"cik":"0001862622","reported_name":"Graf Acquisition Partners IV LLC","relationship":{"director":false,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}},{"id":36423,"kind":"person","name":"Graf James A","position":2,"cik":"0001519672","reported_name":"Graf James A","relationship":{"director":false,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2021-06-02T17:13:41.000Z","date":"2021-06-02","kind":"other","acquired":false,"shares":22125,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On June 2, 2021, Graf Acquisition Partners IV LLC (the \"Sponsor\") forfeited at no cost 22,125 shares of common stock of the Issuer in connection with the election by the underwriters of the Issuer's initial public offering of units to exercise an option granted to them to cover over-allotments in part and not in full."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Sponsor is the record holder of the securities reported herein. James A. Graf is the managing member of the Sponsor. Mr. Graf has voting and investment discretion with respect to the securities held of record by the Sponsor."}],"balance_after":4230375,"source":{"system":"sec-edgar","filing":"0001104659-21-075828","document":"tm2118241d1_4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1862622/000110465921075828/tm2118241d1_4.xml","form_type":"4"}}]}