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(\"Qualified Fund\"). EcoR1 is the investment adviser and general partner of private funds, including Qualified Fund (collectively, the \"Funds\"). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The filers disclaim beneficial ownership of such securities except to the extent of their pecuniary interests therein."}],"balance_after":3174519,"source":{"system":"sec-edgar","filing":"0000935836-26-000208","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1587114/000093583626000208/ownership.xml","form_type":"4"}},{"id":802880,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":22253,"kind":"person","name":"Lizzul Paul F.","position":1,"cik":"0001711462","reported_name":"Lizzul Paul F.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-04-22T20:05:24.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":21400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration."},{"field":"kind","element":"transactionCoding","label":"F8","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F12","text":"The RSUs vests as to 25% of the total RSUs annually commencing on January 6, 2027 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F12","text":"The RSUs vests as to 25% of the total RSUs annually commencing on January 6, 2027 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":21400,"derivative":{"underlying":"Common Stock","underlying_shares":21400},"source":{"system":"sec-edgar","filing":"0001711462-26-000009","document":"form4-04222026_040419.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1711462/000171146226000009/form4-04222026_040419.xml","form_type":"4"}},{"id":802879,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":22253,"kind":"person","name":"Lizzul Paul F.","position":1,"cik":"0001711462","reported_name":"Lizzul Paul F.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-04-22T20:05:24.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":25575,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration."},{"field":"kind","element":"transactionCoding","label":"F8","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F11","text":"The RSUs vests as to 25% of the total RSUs annually commencing on January 7, 2026 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F11","text":"The RSUs vests as to 25% of the total RSUs annually commencing on January 7, 2026 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":25575,"derivative":{"underlying":"Common Stock","underlying_shares":25575},"source":{"system":"sec-edgar","filing":"0001711462-26-000009","document":"form4-04222026_040419.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1711462/000171146226000009/form4-04222026_040419.xml","form_type":"4"}},{"id":802878,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":22253,"kind":"person","name":"Lizzul Paul F.","position":1,"cik":"0001711462","reported_name":"Lizzul Paul F.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-04-22T20:05:24.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":21110,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration."},{"field":"kind","element":"transactionCoding","label":"F8","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F10","text":"The RSUs vests as to 25% of the total RSUs annually commencing on January 3, 2025 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F10","text":"The RSUs vests as to 25% of the total RSUs annually commencing on January 3, 2025 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":21110,"derivative":{"underlying":"Common Stock","underlying_shares":21110},"source":{"system":"sec-edgar","filing":"0001711462-26-000009","document":"form4-04222026_040419.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1711462/000171146226000009/form4-04222026_040419.xml","form_type":"4"}},{"id":802877,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":22253,"kind":"person","name":"Lizzul Paul F.","position":1,"cik":"0001711462","reported_name":"Lizzul Paul F.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-04-22T20:05:24.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":6145,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration."},{"field":"kind","element":"transactionCoding","label":"F8","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The RSUs vests as to 25% of the total RSUs annually commencing on January 6, 2024 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F9","text":"The RSUs vests as to 25% of the total RSUs annually commencing on January 6, 2024 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":6145,"derivative":{"underlying":"Common Stock","underlying_shares":6145},"source":{"system":"sec-edgar","filing":"0001711462-26-000009","document":"form4-04222026_040419.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1711462/000171146226000009/form4-04222026_040419.xml","form_type":"4"}},{"id":802876,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":22253,"kind":"person","name":"Lizzul Paul F.","position":1,"cik":"0001711462","reported_name":"Lizzul Paul F.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:24.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":29000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The stock option vests as to 25% of the total shares on January 6, 2027, and thereafter vests as to 1/48 of the total shares monthly until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":29000,"derivative":{"exercise_price":11.75,"expiration_date":"2036-01-06","underlying":"Common Stock","underlying_shares":29000},"source":{"system":"sec-edgar","filing":"0001711462-26-000009","document":"form4-04222026_040419.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1711462/000171146226000009/form4-04222026_040419.xml","form_type":"4"}},{"id":802875,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":22253,"kind":"person","name":"Lizzul Paul F.","position":1,"cik":"0001711462","reported_name":"Lizzul Paul F.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:24.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":97200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The stock option vests as to 25% of the total shares on January 7, 2026, and thereafter vests as to 1/48 of the total shares monthly until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":97200,"derivative":{"exercise_price":3.97,"expiration_date":"2035-01-06","underlying":"Common Stock","underlying_shares":97200},"source":{"system":"sec-edgar","filing":"0001711462-26-000009","document":"form4-04222026_040419.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1711462/000171146226000009/form4-04222026_040419.xml","form_type":"4"}},{"id":802874,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":22253,"kind":"person","name":"Lizzul Paul F.","position":1,"cik":"0001711462","reported_name":"Lizzul Paul F.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:24.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":115540,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The stock option vests as to 25% of the total shares on January 3, 2025, and thereafter vests as to 1/48 of the total shares monthly until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":115540,"derivative":{"exercise_price":5.67,"expiration_date":"2034-01-02","underlying":"Common Stock","underlying_shares":115540},"source":{"system":"sec-edgar","filing":"0001711462-26-000009","document":"form4-04222026_040419.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1711462/000171146226000009/form4-04222026_040419.xml","form_type":"4"}},{"id":802873,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":22253,"kind":"person","name":"Lizzul Paul F.","position":1,"cik":"0001711462","reported_name":"Lizzul Paul F.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:24.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":67070,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock option is fully vested and exercisable."}],"balance_after":67070,"derivative":{"exercise_price":6.22,"expiration_date":"2033-01-05","underlying":"Common Stock","underlying_shares":67070},"source":{"system":"sec-edgar","filing":"0001711462-26-000009","document":"form4-04222026_040419.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1711462/000171146226000009/form4-04222026_040419.xml","form_type":"4"}},{"id":802872,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":22253,"kind":"person","name":"Lizzul Paul F.","position":1,"cik":"0001711462","reported_name":"Lizzul Paul F.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:24.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":70000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock option is fully vested and exercisable."}],"balance_after":70000,"derivative":{"exercise_price":8.14,"expiration_date":"2032-02-09","underlying":"Common Stock","underlying_shares":70000},"source":{"system":"sec-edgar","filing":"0001711462-26-000009","document":"form4-04222026_040419.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1711462/000171146226000009/form4-04222026_040419.xml","form_type":"4"}},{"id":802871,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":22253,"kind":"person","name":"Lizzul Paul F.","position":1,"cik":"0001711462","reported_name":"Lizzul Paul F.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:24.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":45000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock option is fully vested and exercisable."}],"balance_after":45000,"derivative":{"exercise_price":7.95,"expiration_date":"2031-02-09","underlying":"Common Stock","underlying_shares":45000},"source":{"system":"sec-edgar","filing":"0001711462-26-000009","document":"form4-04222026_040419.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1711462/000171146226000009/form4-04222026_040419.xml","form_type":"4"}},{"id":802870,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":22253,"kind":"person","name":"Lizzul Paul F.","position":1,"cik":"0001711462","reported_name":"Lizzul Paul F.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:24.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":83500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock option is fully vested and exercisable."}],"balance_after":83500,"derivative":{"exercise_price":4.95,"expiration_date":"2030-07-29","underlying":"Common Stock","underlying_shares":83500},"source":{"system":"sec-edgar","filing":"0001711462-26-000009","document":"form4-04222026_040419.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1711462/000171146226000009/form4-04222026_040419.xml","form_type":"4"}},{"id":802869,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":10095,"kind":"person","name":"Ware J. Anthony","position":1,"cik":"0001715429","reported_name":"Ware J. 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As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2027 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2027 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":4000,"derivative":{"underlying":"Common Stock","underlying_shares":4000},"source":{"system":"sec-edgar","filing":"0001715429-26-000003","document":"form4-04222026_040417.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1715429/000171542926000003/form4-04222026_040417.xml","form_type":"4"}},{"id":802868,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":10095,"kind":"person","name":"Ware J. 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As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The stock option vests as to 1/12 of the total shares monthly commencing on February 6, 2026 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":5500,"derivative":{"exercise_price":11.75,"expiration_date":"2036-01-06","underlying":"Common Stock","underlying_shares":5500},"source":{"system":"sec-edgar","filing":"0001478916-26-000005","document":"form4-04222026_040415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1478916/000147891626000005/form4-04222026_040415.xml","form_type":"4"}},{"id":802736,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":25051,"kind":"person","name":"Schmid John P.","position":1,"cik":"0001478916","reported_name":"Schmid John P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:20.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":16510,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock option is fully vested and exercisable."}],"balance_after":16510,"derivative":{"exercise_price":3.97,"expiration_date":"2035-01-06","underlying":"Common Stock","underlying_shares":16510},"source":{"system":"sec-edgar","filing":"0001478916-26-000005","document":"form4-04222026_040415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1478916/000147891626000005/form4-04222026_040415.xml","form_type":"4"}},{"id":802735,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":25051,"kind":"person","name":"Schmid John P.","position":1,"cik":"0001478916","reported_name":"Schmid John P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:20.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":16510,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock option is fully vested and exercisable."}],"balance_after":16510,"derivative":{"exercise_price":5.67,"expiration_date":"2034-01-02","underlying":"Common Stock","underlying_shares":16510},"source":{"system":"sec-edgar","filing":"0001478916-26-000005","document":"form4-04222026_040415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1478916/000147891626000005/form4-04222026_040415.xml","form_type":"4"}},{"id":802734,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":25051,"kind":"person","name":"Schmid John P.","position":1,"cik":"0001478916","reported_name":"Schmid John P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:20.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":10600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock option is fully vested and exercisable."}],"balance_after":10600,"derivative":{"exercise_price":6.22,"expiration_date":"2033-01-05","underlying":"Common Stock","underlying_shares":10600},"source":{"system":"sec-edgar","filing":"0001478916-26-000005","document":"form4-04222026_040415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1478916/000147891626000005/form4-04222026_040415.xml","form_type":"4"}},{"id":802733,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":25051,"kind":"person","name":"Schmid John P.","position":1,"cik":"0001478916","reported_name":"Schmid John P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:20.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":9200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock option is fully vested and exercisable."}],"balance_after":9200,"derivative":{"exercise_price":8.14,"expiration_date":"2032-02-09","underlying":"Common Stock","underlying_shares":9200},"source":{"system":"sec-edgar","filing":"0001478916-26-000005","document":"form4-04222026_040415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1478916/000147891626000005/form4-04222026_040415.xml","form_type":"4"}},{"id":802732,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":25051,"kind":"person","name":"Schmid John P.","position":1,"cik":"0001478916","reported_name":"Schmid John P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:20.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":11000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock option is fully vested and exercisable."}],"balance_after":11000,"derivative":{"exercise_price":7.95,"expiration_date":"2031-02-09","underlying":"Common Stock","underlying_shares":11000},"source":{"system":"sec-edgar","filing":"0001478916-26-000005","document":"form4-04222026_040415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1478916/000147891626000005/form4-04222026_040415.xml","form_type":"4"}},{"id":802731,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":25051,"kind":"person","name":"Schmid John P.","position":1,"cik":"0001478916","reported_name":"Schmid John P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:20.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":11000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock option is fully vested and exercisable."}],"balance_after":11000,"derivative":{"exercise_price":4.43,"expiration_date":"2030-02-11","underlying":"Common Stock","underlying_shares":11000},"source":{"system":"sec-edgar","filing":"0001478916-26-000005","document":"form4-04222026_040415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1478916/000147891626000005/form4-04222026_040415.xml","form_type":"4"}},{"id":802730,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":25051,"kind":"person","name":"Schmid John P.","position":1,"cik":"0001478916","reported_name":"Schmid John P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:20.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":6000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock option is fully vested and exercisable."}],"balance_after":6000,"derivative":{"exercise_price":18.43,"expiration_date":"2029-02-07","underlying":"Common Stock","underlying_shares":6000},"source":{"system":"sec-edgar","filing":"0001478916-26-000005","document":"form4-04222026_040415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1478916/000147891626000005/form4-04222026_040415.xml","form_type":"4"}},{"id":802729,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":25051,"kind":"person","name":"Schmid John P.","position":1,"cik":"0001478916","reported_name":"Schmid John P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:20.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":6000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock option is fully vested and exercisable."}],"balance_after":6000,"derivative":{"exercise_price":28.03,"expiration_date":"2028-02-01","underlying":"Common Stock","underlying_shares":6000},"source":{"system":"sec-edgar","filing":"0001478916-26-000005","document":"form4-04222026_040415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1478916/000147891626000005/form4-04222026_040415.xml","form_type":"4"}},{"id":802728,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":25051,"kind":"person","name":"Schmid John P.","position":1,"cik":"0001478916","reported_name":"Schmid John P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2026-04-22T20:05:20.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":15000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the \"Separation Agreement\"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock option is fully vested and exercisable."}],"balance_after":15000,"derivative":{"exercise_price":6.58,"expiration_date":"2027-02-23","underlying":"Common Stock","underlying_shares":15000},"source":{"system":"sec-edgar","filing":"0001478916-26-000005","document":"form4-04222026_040415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1478916/000147891626000005/form4-04222026_040415.xml","form_type":"4"}},{"id":802716,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":37244,"kind":"person","name":"Orwin John A","position":1,"cik":"0001477384","reported_name":"Orwin John A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-04-22T20:05:17.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":6000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration."},{"field":"kind","element":"transactionCoding","label":"F6","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2027 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F9","text":"The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2027 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":6000,"derivative":{"underlying":"Common Stock","underlying_shares":6000},"source":{"system":"sec-edgar","filing":"0001477384-26-000004","document":"form4-04222026_040413.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1477384/000147738426000004/form4-04222026_040413.xml","form_type":"4"}},{"id":802715,"issuer":{"id":4696,"kind":"organization","name":"First Tracks Biotherapeutics, Inc.","symbol":"TRAX"},"owners":[{"id":37244,"kind":"person","name":"Orwin John A","position":1,"cik":"0001477384","reported_name":"Orwin John A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-04-22T20:05:17.000Z","date":"2026-04-20","kind":"grant","planned":false,"acquired":true,"shares":6030,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration."},{"field":"kind","element":"transactionCoding","label":"F6","text":"Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2026 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2026 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":6030,"derivative":{"underlying":"Common Stock","underlying_shares":6030},"source":{"system":"sec-edgar","filing":"0001477384-26-000004","document":"form4-04222026_040413.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1477384/000147738426000004/form4-04222026_040413.xml","form_type":"4"}}],"next_cursor":"2026-04-22T20:05:17.000000Z,802715"}