{"transactions":[{"id":764073,"issuer":{"id":5242,"kind":"organization","name":"Verastem, Inc.","symbol":"VSTM"},"owners":[{"id":44283,"kind":"person","name":"Tollefson Karin Anna","position":1,"cik":"0001976551","reported_name":"Tollefson Karin Anna","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-26T22:23:36.000Z","date":"2026-05-21","kind":"grant","planned":false,"acquired":true,"shares":36000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"RSUs granted to the Reporting Person under the Issuer's Amended and Restated 2021 Equity Incentive Plan. Each RSU represents the contingent right to receive one share of Common Stock. The RSUs vest in twelve substantially equal installments (rounded down to the nearest whole share on each vesting date except with respect to the final vesting date on which the remaining unvested portion shall vest). The first eleven installments shall vest beginning on the last day of each month over a period from June, 2026 to April, 2027 and the last installment shall vest on the earlier of (i) the day before the 2027 Annual Meeting of Stockholders is held or (ii) May 31, 2027, provided that the Reporting Person continues to serve as a director of the Issuer on each such vesting date."}],"balance_after":52666,"source":{"system":"sec-edgar","filing":"0001104659-26-066428","document":"tm2615478-3_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1976551/000110465926066428/tm2615478-3_4seq1.xml","form_type":"4"}},{"id":1133661,"issuer":{"id":5242,"kind":"organization","name":"Verastem, Inc.","symbol":"VSTM"},"owners":[{"id":44283,"kind":"person","name":"Tollefson Karin Anna","position":1,"cik":"0001976551","reported_name":"Tollefson Karin Anna","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2025-05-27T21:43:08.000Z","date":"2025-05-22","kind":"grant","planned":false,"acquired":true,"shares":12500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The stock option vests in twelve equal installments (rounded down to the nearest whole share on each vesting date except with respect to the final vesting date on which the remaining unvested portion shall vest). The first eleven installments shall vest beginning on the last day of each month over a period from June, 2025 to April, 2026 and the last installment shall vest on the earlier of (i) the day before the 2026 Annual Meeting of Stockholders is held or (ii) May 31, 2026, provided that the Reporting Person continues to serve as a director of the Issuer on each such vesting date."}],"balance_after":12500,"derivative":{"exercise_price":7.48,"expiration_date":"2035-05-22","underlying":"Common Stock","underlying_shares":12500},"source":{"system":"sec-edgar","filing":"0001104659-25-053095","document":"tm2516118-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1976551/000110465925053095/tm2516118-3_4seq1.xml","form_type":"4"}},{"id":1133660,"issuer":{"id":5242,"kind":"organization","name":"Verastem, Inc.","symbol":"VSTM"},"owners":[{"id":44283,"kind":"person","name":"Tollefson Karin Anna","position":1,"cik":"0001976551","reported_name":"Tollefson Karin Anna","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-05-27T21:43:08.000Z","date":"2025-05-22","kind":"grant","planned":false,"acquired":true,"shares":8333,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"RSUs granted to the Reporting Person under the Issuer's Amended and Restated 2021 Equity Incentive Plan. Each RSU represents the contingent right to receive one share of Common Stock. The RSUs vest in twelve equal installments (rounded down to the nearest whole share on each vesting date except with respect to the final vesting date on which the remaining unvested portion shall vest). The first eleven installments shall vest beginning on the last day of each month over a period from June, 2025 to April, 2026 and the last installment shall vest on the earlier of (i) the day before the 2026 Annual Meeting of Stockholders is held or (ii) May 31, 2026, provided that the Reporting Person continues to serve as a director of the Issuer on each such vesting date."}],"balance_after":16666,"source":{"system":"sec-edgar","filing":"0001104659-25-053095","document":"tm2516118-3_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1976551/000110465925053095/tm2516118-3_4seq1.xml","form_type":"4"}},{"id":1473494,"issuer":{"id":5242,"kind":"organization","name":"Verastem, Inc.","symbol":"VSTM"},"owners":[{"id":44283,"kind":"person","name":"Tollefson Karin Anna","position":1,"cik":"0001976551","reported_name":"Tollefson Karin Anna","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2024-06-21T00:29:07.000Z","date":"2024-06-18","kind":"grant","planned":false,"acquired":true,"shares":12500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The stock option vests in twelve equal installments (rounded down to the nearest whole share on each vesting date except with respect to the final vesting date on which the remaining unvested portion shall vest). The first eleven installments shall vest beginning on the last day of each month over a period from June, 2024 to April, 2025 and the last installment shall vest on the earlier of (i) the day before the 2025 Annual Meeting of Stockholders is held or (ii) May 31, 2025, provided that the Reporting Person continues to serve as a director of the Issuer on each such vesting date."}],"balance_after":12500,"derivative":{"exercise_price":3.27,"expiration_date":"2034-06-18","underlying":"Common Stock","underlying_shares":12500},"source":{"system":"sec-edgar","filing":"0001104659-24-073603","document":"tm2417704-8_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1976551/000110465924073603/tm2417704-8_4seq1.xml","form_type":"4"}},{"id":1473493,"issuer":{"id":5242,"kind":"organization","name":"Verastem, Inc.","symbol":"VSTM"},"owners":[{"id":44283,"kind":"person","name":"Tollefson Karin Anna","position":1,"cik":"0001976551","reported_name":"Tollefson Karin Anna","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-06-21T00:29:07.000Z","date":"2024-06-18","kind":"grant","planned":false,"acquired":true,"shares":8333,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Restricted stock units (\"RSUs\") granted to the Reporting Person under the Issuer's Amended and Restated 2021 Equity Incentive Plan. Each RSU represents the contingent right to receive one share of Common Stock. The RSUs vest in twelve equal installments (rounded down to the nearest whole share on each vesting date except with respect to the final vesting date on which the remaining unvested portion shall vest). The first eleven installments shall vest beginning on the last day of each month over a period from June, 2024 to April, 2025 and the last installment shall vest on the earlier of (i) the day before the 2025 Annual Meeting of Stockholders is held or (ii) May 31, 2025, provided that the Reporting Person continues to serve as a director of the Issuer on each such vesting date."}],"balance_after":8333,"source":{"system":"sec-edgar","filing":"0001104659-24-073603","document":"tm2417704-8_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1976551/000110465924073603/tm2417704-8_4seq1.xml","form_type":"4"}},{"id":1891848,"issuer":{"id":5242,"kind":"organization","name":"Verastem, Inc.","symbol":"VSTM"},"owners":[{"id":44283,"kind":"person","name":"Tollefson Karin Anna","position":1,"cik":"0001976551","reported_name":"Tollefson Karin Anna","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2023-05-16T20:31:46.000Z","date":"2023-05-15","kind":"grant","planned":false,"acquired":true,"shares":187500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"125,000 of the stock options vest in twelve equal quarterly installments beginning each three successive month period following May 15, 2023 (the \"Option Grant Date\") until the third anniversary of the Option Grant Date (with the number of shares vesting on each vesting date rounded down to the nearest whole share, except with respect to the final vesting date on which all remaining unvested shares shall vest)."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"62,500 of the stock options vests in twelve equal installments (rounded down to the nearest whole share on each vesting date except with respect to the final vesting date on which the remaining unvested portion shall vest). The first eleven installments shall vest beginning on the last day of each month over a period from June, 2023 to April, 2024 and the last installment shall vest on the earlier of (i) the day before the 2024 Annual Meeting of Stockholders is held or (ii) May 31, 2024, provided that the Reporting Person continues to serve as a director of the Company on each such vesting date."}],"balance_after":187500,"derivative":{"exercise_price":0.42,"expiration_date":"2033-05-15","underlying":"Common Stock","underlying_shares":187500},"source":{"system":"sec-edgar","filing":"0001104659-23-061414","document":"tm2315836-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1976551/000110465923061414/tm2315836-2_4seq1.xml","form_type":"4"}}]}