{"transactions":[{"id":729199,"issuer":{"id":2273,"kind":"organization","name":"Disc Medicine, Inc.","symbol":"IRON"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2026-06-23T20:58:04.000Z","date":"2026-06-18","kind":"grant","planned":false,"acquired":true,"shares":6212,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares underlying this option vest upon the first to occur of (i) the date of the Company's 2027 annual meeting of its stockholders, or (ii) the one-year anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date."}],"balance_after":6212,"derivative":{"exercise_price":70.79,"expiration_date":"2036-06-17","underlying":"Common Stock","underlying_shares":6212},"source":{"system":"sec-edgar","filing":"0001193125-26-279708","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1816736/000119312526279708/ownership.xml","form_type":"4"}},{"id":1111855,"issuer":{"id":2273,"kind":"organization","name":"Disc Medicine, Inc.","symbol":"IRON"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2025-06-13T21:18:49.000Z","date":"2025-06-11","kind":"grant","planned":false,"acquired":true,"shares":10000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares underlying this option vest upon the first to occur of (i) the date of the Company's 2026 annual meeting of its stockholders, or (ii) the one-year anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date."}],"balance_after":10000,"derivative":{"exercise_price":50.86,"expiration_date":"2035-06-10","underlying":"Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0000950170-25-086374","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1816736/000095017025086374/ownership.xml","form_type":"4"}},{"id":1479194,"issuer":{"id":2273,"kind":"organization","name":"Disc Medicine, Inc.","symbol":"IRON"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2024-06-14T20:15:05.000Z","date":"2024-06-12","kind":"grant","planned":false,"acquired":true,"shares":10000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares underlying this option vest upon the first to occur of (i) the date of the Company's 2025 annual meeting of its stockholders, or (ii) the one-year anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date."}],"balance_after":10000,"derivative":{"exercise_price":38.85,"expiration_date":"2034-06-11","underlying":"Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0000950170-24-073671","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1816736/000095017024073671/ownership.xml","form_type":"4"}},{"id":1584286,"issuer":{"id":11424,"kind":"organization","name":"Harpoon Therapeutics, Inc.","symbol":"HARP"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Director Stock Option (Right to 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shares of Common Stock granted under an Issuer equity plan (each, a \"Stock Option\"), to the extent unvested, became fully vested and exercisable effective immediately prior to, and contingent upon, the Effective Time. Pursuant to the terms of the Merger Agreement, at the Effective Time, (i) each Stock Option that was outstanding and unexercised immediately prior to the Effective Time and that had a per share exercise price that is less than the Common Stock Merger Consideration (each, an \"In the Money Option\") was cancelled in exchange for the right to receive an amount in cash (without interest and subject to any applicable withholding or other taxes) equal to the product of (1) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time and (2) the excess of the"},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"(Continued from footnote 6) Common Stock Merger Consideration over the per share exercise price payable for such Stock Option immediately prior to the Effective Time and (ii) each Stock Option other than an In the Money Option then outstanding and unexercised was cancelled with no consideration payable in respect thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding option to purchase shares of Common Stock granted under an Issuer equity plan (each, a \"Stock Option\"), to the extent unvested, became fully vested and exercisable effective immediately prior to, and contingent upon, the Effective Time. Pursuant to the terms of the Merger Agreement, at the Effective Time, (i) each Stock Option that was outstanding and unexercised immediately prior to the Effective Time and that had a per share exercise price that is less than the Common Stock Merger Consideration (each, an \"In the Money Option\") was cancelled in exchange for the right to receive an amount in cash (without interest and subject to any applicable withholding or other taxes) equal to the product of (1) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time and (2) the excess of the"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"(Continued from footnote 6) Common Stock Merger Consideration over the per share exercise price payable for such Stock Option immediately prior to the Effective Time and (ii) each Stock Option other than an In the Money Option then outstanding and unexercised was cancelled with no consideration payable in respect thereof."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding option to purchase shares of Common Stock granted under an Issuer equity plan (each, a \"Stock Option\"), to the extent unvested, became fully vested and exercisable effective immediately prior to, and contingent upon, the Effective Time. Pursuant to the terms of the Merger Agreement, at the Effective Time, (i) each Stock Option that was outstanding and unexercised immediately prior to the Effective Time and that had a per share exercise price that is less than the Common Stock Merger Consideration (each, an \"In the Money Option\") was cancelled in exchange for the right to receive an amount in cash (without interest and subject to any applicable withholding or other taxes) equal to the product of (1) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time and (2) the excess of the"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"(Continued from footnote 6) Common Stock Merger Consideration over the per share exercise price payable for such Stock Option immediately prior to the Effective Time and (ii) each Stock Option other than an In the Money Option then outstanding and unexercised was cancelled with no consideration payable in respect thereof."}],"balance_after":0,"derivative":{"exercise_price":6.657,"underlying":"Common Stock","underlying_shares":2300},"source":{"system":"sec-edgar","filing":"0000950170-24-029439","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000095017024029439/ownership.xml","form_type":"4"}},{"id":1584285,"issuer":{"id":11424,"kind":"organization","name":"Harpoon Therapeutics, Inc.","symbol":"HARP"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Director Stock Option (Right to Buy)","published_at":"2024-03-11T21:22:57.000Z","date":"2024-03-11","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":3214,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the \"Merger Agreement\"), dated as of January 7, 2024, by and among the Issuer, Merck Sharp & Dohme LLC, a New Jersey limited liability company (\"Parent\"), and Hawaii Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent (\"Merger Sub\"), pursuant to which Merger Sub merged with and into the Issuer on March 11, 2024, with the Issuer surviving the merger as a wholly owned subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding option to purchase shares of Common Stock granted under an Issuer equity plan (each, a \"Stock Option\"), to the extent unvested, became fully vested and exercisable effective immediately prior to, and contingent upon, the Effective Time. Pursuant to the terms of the Merger Agreement, at the Effective Time, (i) each Stock Option that was outstanding and unexercised immediately prior to the Effective Time and that had a per share exercise price that is less than the Common Stock Merger Consideration (each, an \"In the Money Option\") was cancelled in exchange for the right to receive an amount in cash (without interest and subject to any applicable withholding or other taxes) equal to the product of (1) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time and (2) the excess of the"},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"(Continued from footnote 6) Common Stock Merger Consideration over the per share exercise price payable for such Stock Option immediately prior to the Effective Time and (ii) each Stock Option other than an In the Money Option then outstanding and unexercised was cancelled with no consideration payable in respect thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding option to purchase shares of Common Stock granted under an Issuer equity plan (each, a \"Stock Option\"), to the extent unvested, became fully vested and exercisable effective immediately prior to, and contingent upon, the Effective Time. Pursuant to the terms of the Merger Agreement, at the Effective Time, (i) each Stock Option that was outstanding and unexercised immediately prior to the Effective Time and that had a per share exercise price that is less than the Common Stock Merger Consideration (each, an \"In the Money Option\") was cancelled in exchange for the right to receive an amount in cash (without interest and subject to any applicable withholding or other taxes) equal to the product of (1) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time and (2) the excess of the"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"(Continued from footnote 6) Common Stock Merger Consideration over the per share exercise price payable for such Stock Option immediately prior to the Effective Time and (ii) each Stock Option other than an In the Money Option then outstanding and unexercised was cancelled with no consideration payable in respect thereof."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding option to purchase shares of Common Stock granted under an Issuer equity plan (each, a \"Stock Option\"), to the extent unvested, became fully vested and exercisable effective immediately prior to, and contingent upon, the Effective Time. Pursuant to the terms of the Merger Agreement, at the Effective Time, (i) each Stock Option that was outstanding and unexercised immediately prior to the Effective Time and that had a per share exercise price that is less than the Common Stock Merger Consideration (each, an \"In the Money Option\") was cancelled in exchange for the right to receive an amount in cash (without interest and subject to any applicable withholding or other taxes) equal to the product of (1) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time and (2) the excess of the"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"(Continued from footnote 6) Common Stock Merger Consideration over the per share exercise price payable for such Stock Option immediately prior to the Effective Time and (ii) each Stock Option other than an In the Money Option then outstanding and unexercised was cancelled with no consideration payable in respect thereof."}],"balance_after":0,"derivative":{"exercise_price":20.1,"underlying":"Common Stock","underlying_shares":3214},"source":{"system":"sec-edgar","filing":"0000950170-24-029439","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000095017024029439/ownership.xml","form_type":"4"}},{"id":1584284,"issuer":{"id":11424,"kind":"organization","name":"Harpoon Therapeutics, Inc.","symbol":"HARP"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Director Stock Option (Right to Buy)","published_at":"2024-03-11T21:22:57.000Z","date":"2024-03-11","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":1016,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the \"Merger Agreement\"), dated as of January 7, 2024, by and among the Issuer, Merck Sharp & Dohme LLC, a New Jersey limited liability company (\"Parent\"), and Hawaii Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent (\"Merger Sub\"), pursuant to which Merger Sub merged with and into the Issuer on March 11, 2024, with the Issuer surviving the merger as a wholly owned subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding option to purchase shares of Common Stock granted under an Issuer equity plan (each, a \"Stock Option\"), to the extent unvested, became fully vested and exercisable effective immediately prior to, and contingent upon, the Effective Time. Pursuant to the terms of the Merger Agreement, at the Effective Time, (i) each Stock Option that was outstanding and unexercised immediately prior to the Effective Time and that had a per share exercise price that is less than the Common Stock Merger Consideration (each, an \"In the Money Option\") was cancelled in exchange for the right to receive an amount in cash (without interest and subject to any applicable withholding or other taxes) equal to the product of (1) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time and (2) the excess of the"},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"(Continued from footnote 6) Common Stock Merger Consideration over the per share exercise price payable for such Stock Option immediately prior to the Effective Time and (ii) each Stock Option other than an In the Money Option then outstanding and unexercised was cancelled with no consideration payable in respect thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding option to purchase shares of Common Stock granted under an Issuer equity plan (each, a \"Stock Option\"), to the extent unvested, became fully vested and exercisable effective immediately prior to, and contingent upon, the Effective Time. Pursuant to the terms of the Merger Agreement, at the Effective Time, (i) each Stock Option that was outstanding and unexercised immediately prior to the Effective Time and that had a per share exercise price that is less than the Common Stock Merger Consideration (each, an \"In the Money Option\") was cancelled in exchange for the right to receive an amount in cash (without interest and subject to any applicable withholding or other taxes) equal to the product of (1) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time and (2) the excess of the"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"(Continued from footnote 6) Common Stock Merger Consideration over the per share exercise price payable for such Stock Option immediately prior to the Effective Time and (ii) each Stock Option other than an In the Money Option then outstanding and unexercised was cancelled with no consideration payable in respect thereof."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding option to purchase shares of Common Stock granted under an Issuer equity plan (each, a \"Stock Option\"), to the extent unvested, became fully vested and exercisable effective immediately prior to, and contingent upon, the Effective Time. Pursuant to the terms of the Merger Agreement, at the Effective Time, (i) each Stock Option that was outstanding and unexercised immediately prior to the Effective Time and that had a per share exercise price that is less than the Common Stock Merger Consideration (each, an \"In the Money Option\") was cancelled in exchange for the right to receive an amount in cash (without interest and subject to any applicable withholding or other taxes) equal to the product of (1) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time and (2) the excess of the"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"(Continued from footnote 6) Common Stock Merger Consideration over the per share exercise price payable for such Stock Option immediately prior to the Effective Time and (ii) each Stock Option other than an In the Money Option then outstanding and unexercised was cancelled with no consideration payable in respect thereof."}],"balance_after":0,"derivative":{"exercise_price":20.1,"underlying":"Common Stock","underlying_shares":1016},"source":{"system":"sec-edgar","filing":"0000950170-24-029439","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000095017024029439/ownership.xml","form_type":"4"}},{"id":1584283,"issuer":{"id":11424,"kind":"organization","name":"Harpoon Therapeutics, Inc.","symbol":"HARP"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Director Stock Option (Right to Buy)","published_at":"2024-03-11T21:22:57.000Z","date":"2024-03-11","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":2033,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the \"Merger Agreement\"), dated as of January 7, 2024, by and among the Issuer, Merck Sharp & Dohme LLC, a New Jersey limited liability company (\"Parent\"), and Hawaii Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent (\"Merger Sub\"), pursuant to which Merger Sub merged with and into the Issuer on March 11, 2024, with the Issuer surviving the merger as a wholly owned subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding option to purchase shares of Common Stock granted under an Issuer equity plan (each, a \"Stock Option\"), to the extent unvested, became fully vested and exercisable effective immediately prior to, and contingent upon, the Effective Time. Pursuant to the terms of the Merger Agreement, at the Effective Time, (i) each Stock Option that was outstanding and unexercised immediately prior to the Effective Time and that had a per share exercise price that is less than the Common Stock Merger Consideration (each, an \"In the Money Option\") was cancelled in exchange for the right to receive an amount in cash (without interest and subject to any applicable withholding or other taxes) equal to the product of (1) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time and (2) the excess of the"},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"(Continued from footnote 6) Common Stock Merger Consideration over the per share exercise price payable for such Stock Option immediately prior to the Effective Time and (ii) each Stock Option other than an In the Money Option then outstanding and unexercised was cancelled with no consideration payable in respect thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding option to purchase shares of Common Stock granted under an Issuer equity plan (each, a \"Stock Option\"), to the extent unvested, became fully vested and exercisable effective immediately prior to, and contingent upon, the Effective Time. Pursuant to the terms of the Merger Agreement, at the Effective Time, (i) each Stock Option that was outstanding and unexercised immediately prior to the Effective Time and that had a per share exercise price that is less than the Common Stock Merger Consideration (each, an \"In the Money Option\") was cancelled in exchange for the right to receive an amount in cash (without interest and subject to any applicable withholding or other taxes) equal to the product of (1) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time and (2) the excess of the"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"(Continued from footnote 6) Common Stock Merger Consideration over the per share exercise price payable for such Stock Option immediately prior to the Effective Time and (ii) each Stock Option other than an In the Money Option then outstanding and unexercised was cancelled with no consideration payable in respect thereof."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding option to purchase shares of Common Stock granted under an Issuer equity plan (each, a \"Stock Option\"), to the extent unvested, became fully vested and exercisable effective immediately prior to, and contingent upon, the Effective Time. Pursuant to the terms of the Merger Agreement, at the Effective Time, (i) each Stock Option that was outstanding and unexercised immediately prior to the Effective Time and that had a per share exercise price that is less than the Common Stock Merger Consideration (each, an \"In the Money Option\") was cancelled in exchange for the right to receive an amount in cash (without interest and subject to any applicable withholding or other taxes) equal to the product of (1) the total number of shares of Common Stock subject to such Stock Option immediately prior to the Effective Time and (2) the excess of the"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"(Continued from footnote 6) Common Stock Merger Consideration over the per share exercise price payable for such Stock Option immediately prior to the Effective Time and (ii) each Stock Option other than an In the Money Option then outstanding and unexercised was cancelled with no consideration payable in respect thereof."}],"balance_after":0,"derivative":{"exercise_price":21.1453,"underlying":"Common Stock","underlying_shares":2033},"source":{"system":"sec-edgar","filing":"0000950170-24-029439","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000095017024029439/ownership.xml","form_type":"4"}},{"id":1584282,"issuer":{"id":11424,"kind":"organization","name":"Harpoon Therapeutics, Inc.","symbol":"HARP"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-03-11T21:22:57.000Z","date":"2024-03-11","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":13224,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the \"Merger Agreement\"), dated as of January 7, 2024, by and among the Issuer, Merck Sharp & Dohme LLC, a New Jersey limited liability company (\"Parent\"), and Hawaii Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent (\"Merger Sub\"), pursuant to which Merger Sub merged with and into the Issuer on March 11, 2024, with the Issuer surviving the merger as a wholly owned subsidiary of Parent (the \"Merger\")."},{"field":"shares","element":"transactionShares","label":"F3","text":"Includes 13,224 RSUs which are subject to rounding as a result of the 1:10 reverse stock split effective September 1, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the \"Effective Time\"), each outstanding RSU was cancelled and automatically converted into the right to receive an amount in cash (without interest and subject to any applicable withholding or other taxes) equal to the product of (i) the Common Stock Merger Consideration (as defined below) payable with respect to such RSU multiplied by (ii) the total number of shares of Common Stock subject to such RSU immediately prior to the Effective Time, with the number of shares of Company Common Stock subject to any such Company RSU that vests based on the achievement of performance goals determined in accordance with the applicable award agreement."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"Pursuant to the terms of the Merger Agreement, at the Effective Time, each outstanding share of Common Stock was cancelled and automatically converted into the right to receive $23.00 in cash, without interest (the \"Common Stock Merger Consideration\")."},{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F2","text":"This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the \"Merger Agreement\"), dated as of January 7, 2024, by and among the Issuer, Merck Sharp & Dohme LLC, a New Jersey limited liability company (\"Parent\"), and Hawaii Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent (\"Merger Sub\"), pursuant to which Merger Sub merged with and into the Issuer on March 11, 2024, with the Issuer surviving the merger as a wholly owned subsidiary of Parent (the \"Merger\")."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000950170-24-029439","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000095017024029439/ownership.xml","form_type":"4"}},{"id":1584281,"issuer":{"id":11424,"kind":"organization","name":"Harpoon Therapeutics, Inc.","symbol":"HARP"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-03-11T21:22:57.000Z","date":"2024-03-08","kind":"grant","planned":false,"acquired":true,"shares":424,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents shares of the Issuer's common stock, par value $0.0001 per share (\"Common Stock\") issuable upon the settlement of restricted stock units (\"RSUs\"). Each RSU represents a contingent right to receive one share of Common Stock. The fully vested RSUs were granted to the Reporting Person pursuant to the Issuer's Non-Employee Director Compensation Policy in lieu of prorated retainer fees totaling $9,753.00 for the first quarter of 2024."}],"balance_after":13224,"source":{"system":"sec-edgar","filing":"0000950170-24-029439","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000095017024029439/ownership.xml","form_type":"4"}},{"id":1692713,"issuer":{"id":11424,"kind":"organization","name":"Harpoon Therapeutics, Inc.","symbol":"HARP"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-01-03T21:30:33.000Z","date":"2024-01-01","kind":"grant","planned":false,"acquired":true,"shares":1072,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares of common stock issuable upon the settlement of restricted stock units (\"RSUs\"). 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The reporting person disclaims beneficial ownership of such securities except to the extent of his respective pecuniary interests therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1433261},"source":{"system":"sec-edgar","filing":"0001140361-21-034645","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000114036121034645/form4.xml","form_type":"4"}},{"id":2541708,"issuer":{"id":5986,"kind":"organization","name":"Pyxis Oncology, Inc.","symbol":"PYXS"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-10-15T21:37:36.000Z","date":"2021-10-13","kind":"purchase","acquired":true,"shares":312500,"price":16,"value":5000000.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These securities are held directly by Arix Bioscience Holdings Limited (\"Arix\"). The reporting person is one of four members of the Investment Committee of Arix and, in such capacity, may be deemed to share voting and dispositive power over the securities held by Arix. The reporting person disclaims beneficial ownership of such securities except to the extent of his respective pecuniary interests therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"These securities are held directly by Arix Bioscience Holdings Limited (\"Arix\"). The reporting person is one of four members of the Investment Committee of Arix and, in such capacity, may be deemed to share voting and dispositive power over the securities held by Arix. The reporting person disclaims beneficial ownership of such securities except to the extent of his respective pecuniary interests therein."}],"balance_after":1745761,"source":{"system":"sec-edgar","filing":"0001140361-21-034645","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000114036121034645/form4.xml","form_type":"4"}},{"id":2541707,"issuer":{"id":5986,"kind":"organization","name":"Pyxis Oncology, Inc.","symbol":"PYXS"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-10-15T21:37:36.000Z","date":"2021-10-13","kind":"exercise","acquired":true,"shares":1433261,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These shares of Series B Convertible Preferred Stock converted automatically and for no additional consideration into Common Stock on a 6.359-for-1 basis upon completion of the Issuer's initial public offering (with fractional shares paid out in cash). The shares of Series B Convertible Preferred Stock had no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These securities are held directly by Arix Bioscience Holdings Limited (\"Arix\"). The reporting person is one of four members of the Investment Committee of Arix and, in such capacity, may be deemed to share voting and dispositive power over the securities held by Arix. The reporting person disclaims beneficial ownership of such securities except to the extent of his respective pecuniary interests therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"These securities are held directly by Arix Bioscience Holdings Limited (\"Arix\"). The reporting person is one of four members of the Investment Committee of Arix and, in such capacity, may be deemed to share voting and dispositive power over the securities held by Arix. The reporting person disclaims beneficial ownership of such securities except to the extent of his respective pecuniary interests therein."}],"balance_after":1433261,"source":{"system":"sec-edgar","filing":"0001140361-21-034645","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000114036121034645/form4.xml","form_type":"4"}},{"id":2544542,"issuer":{"id":5986,"kind":"organization","name":"Pyxis Oncology, Inc.","symbol":"PYXS"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true}}],"security":"Stock Option (Right to buy)","published_at":"2021-10-12T23:47:41.000Z","date":"2021-10-07","kind":"grant","acquired":true,"shares":42191,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These stock options vest as to 1/3 of the shares covered by the option on each annual general meeting of the Issuer's stockholders following the October 7, 2021 grant date, subject to the reporting person's continued service through the applicable vesting date."}],"balance_after":42191,"derivative":{"exercise_price":16,"expiration_date":"2031-10-07","underlying":"Common Stock","underlying_shares":42191},"source":{"system":"sec-edgar","filing":"0001140361-21-034423","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000114036121034423/form4.xml","form_type":"4"}},{"id":2623075,"issuer":{"id":4024,"kind":"organization","name":"Enliven Therapeutics, Inc.","symbol":"ELVN"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-07-28T12:50:13.000Z","date":"2021-07-16","kind":"purchase","acquired":true,"shares":1333333,"price":6,"value":7999998.0,"ownership":{"direct":false,"nature":"By entities affiliated with Arix Bioscience plc"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The shares are directly beneficially owned by Arix Bioscience Holdings Limited (\"Arix Ltd.\"). Arix Bioscience Plc (\"Arix Plc\") is the sole owner and parent of Arix Ltd. and may be deemed to indirectly beneficially own the shares held by Arix Ltd.  Mr. Chin is a managing director of Arix plc.  Each of Arix plc and Mr. Chin  disclaim beneficial ownership of such shares except to the extent of their respective pecuniary interests therein."}],"balance_after":2344072,"source":{"system":"sec-edgar","filing":"0001209191-21-048395","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000120919121048395/doc4.xml","form_type":"4"}},{"id":2650207,"issuer":{"id":4024,"kind":"organization","name":"Enliven Therapeutics, Inc.","symbol":"ELVN"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Options (Right to 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the reporting person providing continuous service to the Issuer and the other terms and conditions of the Issuer's Amended and Restated 2018 Equity Incentive Plan, as amended, the RSUs shall vest in full on June 23, 2022."}],"balance_after":36798,"derivative":{"underlying":"Ordinary Shares","underlying_shares":36798},"source":{"system":"sec-edgar","filing":"0000899243-21-025959","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000089924321025959/doc4.xml","form_type":"4"}},{"id":2712478,"issuer":{"id":11424,"kind":"organization","name":"Harpoon Therapeutics, Inc.","symbol":"HARP"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Director Stock Option (Right to 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The original Form 4 filed on May 7, 2021 erroneously reported this vesting date as May 4, 2022."}],"balance_after":10167,"derivative":{"exercise_price":23.2,"expiration_date":"2031-05-03","underlying":"Common Stock","underlying_shares":10167},"source":{"system":"sec-edgar","filing":"0001209191-21-032951","document":"doc4a.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000120919121032951/doc4a.xml","form_type":"4/A","original_submission_date":"2021-05-07"}},{"id":2723279,"issuer":{"id":11424,"kind":"organization","name":"Harpoon Therapeutics, Inc.","symbol":"HARP"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Director Stock Option (Right to Buy)","published_at":"2021-05-08T01:52:23.000Z","date":"2021-05-04","kind":"grant","acquired":true,"shares":3017,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"50% of the shares subject to the option are fully vested and exercisable, and 25% will vest and become exercisable on September 30, 2021 and December 31, 2021, subject to the continuous service of the Reporting Person on each vesting date."}],"balance_after":3017,"derivative":{"exercise_price":22.5,"expiration_date":"2031-05-03","underlying":"Common Stock","underlying_shares":3017},"source":{"system":"sec-edgar","filing":"0001209191-21-031103","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000120919121031103/doc4.xml","form_type":"4"}},{"id":2723278,"issuer":{"id":11424,"kind":"organization","name":"Harpoon Therapeutics, Inc.","symbol":"HARP"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Director Stock Option (Right to Buy)","published_at":"2021-05-08T01:52:23.000Z","date":"2021-05-04","kind":"grant","acquired":true,"shares":10167,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The stock option will fully vest and become exercisable on May 4, 2022, subject to the continuous service of the Reporting Person with the Issuer on such date."}],"balance_after":10167,"derivative":{"exercise_price":22.5,"expiration_date":"2031-05-03","underlying":"Common Stock","underlying_shares":10167},"source":{"system":"sec-edgar","filing":"0001209191-21-031103","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000120919121031103/doc4.xml","form_type":"4"}},{"id":2814193,"issuer":{"id":72802,"kind":"organization","name":"Iterum Therapeutics plc","symbol":"ITRM"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Ordinary Shares","published_at":"2021-03-03T22:00:41.000Z","date":"2020-07-28","kind":"other","acquired":false,"shares":11857,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were transferred to Arix Bioscience Holdings Limited for no consideration. The reporting person had previously held the position of investment director for Arix Bioscience plc (\"Arix\"), the sole owner and parent of Arix Bioscience Holdings Limited, and had been appointed to the board of the issuer by Arix Bioscience Holdings Limited pursuant to a contractual right it held at that time. Pursuant to an agreement between the reporting person and Arix, following his resignation from Arix, any shares held by the reporting person or received by him from the issuer from the vesting and/or exercise of equity compensation were required to be transferred to Arix Bioscience Holdings Limited."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares were transferred to Arix Bioscience Holdings Limited for no consideration. The reporting person had previously held the position of investment director for Arix Bioscience plc (\"Arix\"), the sole owner and parent of Arix Bioscience Holdings Limited, and had been appointed to the board of the issuer by Arix Bioscience Holdings Limited pursuant to a contractual right it held at that time. Pursuant to an agreement between the reporting person and Arix, following his resignation from Arix, any shares held by the reporting person or received by him from the issuer from the vesting and/or exercise of equity compensation were required to be transferred to Arix Bioscience Holdings Limited."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-21-009419","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000089924321009419/doc4.xml","form_type":"4"}},{"id":3092292,"issuer":{"id":72802,"kind":"organization","name":"Iterum Therapeutics plc","symbol":"ITRM"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock 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subject to the option on the last day of each calendar quarter following the grant date of May 28, 2020 (on June 30, 2020, September 30, 2020, December 31, 2020, and March 31, 2021), subject to the continuous service of the Reporting Person on each vesting date."}],"balance_after":3017,"derivative":{"exercise_price":20.59,"expiration_date":"2030-05-27","underlying":"Common Stock","underlying_shares":3017},"source":{"system":"sec-edgar","filing":"0001209191-20-033319","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000120919120033319/doc4.xml","form_type":"4"}},{"id":3129194,"issuer":{"id":11424,"kind":"organization","name":"Harpoon Therapeutics, Inc.","symbol":"HARP"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin 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2020, the reporting person resigned as an investment director for Arix Bioscience plc, which is the sole owner and parent of Arix Bioscience Holdings Ltd., which holds these securities. As a result of his resignation, the reporting person no longer has any voting power over these securities and therefore has ceased to beneficially own such securities."},{"field":"kind","element":"transactionCoding","label":"F1","text":"On April 7, 2020, the reporting person resigned as an investment director for Arix Bioscience plc, which is the sole owner and parent of Arix Bioscience Holdings Ltd., which holds these securities. As a result of his resignation, the reporting person no longer has any voting power over these securities and therefore has ceased to beneficially own such securities."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On April 7, 2020, the reporting person resigned as an investment director for Arix Bioscience plc, which is the sole owner and parent of Arix Bioscience Holdings Ltd., which holds these securities. As a result of his resignation, the reporting person no longer has any voting power over these securities and therefore has ceased to beneficially own such securities."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On April 7, 2020, the reporting person resigned as an investment director for Arix Bioscience plc, which is the sole owner and parent of Arix Bioscience Holdings Ltd., which holds these securities. As a result of his resignation, the reporting person no longer has any voting power over these securities and therefore has ceased to beneficially own such securities."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Arix Bioscience Holdings Ltd. continues to hold these securities."}],"balance_after":0,"derivative":{"expiration_date":"2025-01-31","underlying":"Ordinary Shares","underlying_shares":1900000},"source":{"system":"sec-edgar","filing":"0000899243-20-010628","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1734389/000089924320010628/doc4.xml","form_type":"4"}},{"id":3179069,"issuer":{"id":72802,"kind":"organization","name":"Iterum Therapeutics plc","symbol":"ITRM"},"owners":[{"id":36001,"kind":"person","name":"Chin Mark","position":1,"cik":"0001734389","reported_name":"Chin Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Ordinary Shares","published_at":"2020-04-10T01:17:08.000Z","date":"2020-04-07","kind":"other","acquired":false,"shares":1089903,"ownership":{"direct":false,"nature":"By Arix Bioscience Holdings Ltd."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On April 7, 2020, the reporting person resigned as an investment director for Arix Bioscience plc, which is the sole owner and parent of Arix Bioscience Holdings Ltd., which holds these securities. As a result of his resignation, the reporting person no longer has any voting power over these securities and therefore has ceased to beneficially own such securities."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On April 7, 2020, the reporting person resigned as an investment director for Arix Bioscience plc, which is the sole owner and parent of Arix Bioscience Holdings Ltd., which holds these securities. 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