{"transactions":[{"id":946648,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70000,"kind":"person","name":"DeSilva Nishan M","position":1,"cik":"0001492386","reported_name":"DeSilva Nishan M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2026-01-06T16:19:28.000Z","date":"2026-01-02","kind":"grant","planned":false,"acquired":true,"shares":7800,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":7800,"derivative":{"exercise_price":6.76,"exercise_date":"2027-01-02","expiration_date":"2036-01-01","underlying":"Common  Stock","underlying_shares":7800},"source":{"system":"sec-edgar","filing":"0001453687-26-000039","document":"wk-form4_1767734365.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1492386/000145368726000039/wk-form4_1767734365.xml","form_type":"4"}},{"id":946647,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70000,"kind":"person","name":"DeSilva Nishan M","position":1,"cik":"0001492386","reported_name":"DeSilva Nishan M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-01-06T16:19:28.000Z","date":"2026-01-02","kind":"grant","planned":false,"acquired":true,"shares":2600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of common stock, which will vest in full on January 2, 2027."}],"balance_after":11366,"source":{"system":"sec-edgar","filing":"0001453687-26-000039","document":"wk-form4_1767734365.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1492386/000145368726000039/wk-form4_1767734365.xml","form_type":"4"}},{"id":1310532,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70000,"kind":"person","name":"DeSilva Nishan M","position":1,"cik":"0001492386","reported_name":"DeSilva Nishan M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2025-01-06T16:19:06.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":7800,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":7800,"derivative":{"exercise_price":16.93,"exercise_date":"2026-01-02","expiration_date":"2035-01-01","underlying":"Common  Stock","underlying_shares":7800},"source":{"system":"sec-edgar","filing":"0001453687-25-000015","document":"wk-form4_1736198338.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1492386/000145368725000015/wk-form4_1736198338.xml","form_type":"4"}},{"id":1310531,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70000,"kind":"person","name":"DeSilva Nishan M","position":1,"cik":"0001492386","reported_name":"DeSilva Nishan M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-01-06T16:19:06.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":2600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of common stock, which will vest in full on January 2, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On April 4, 2024, the issuer effected a 1-for-30 reverse stock split of its common stock (the \"Reverse Stock Split\").  The amount of securities reported on this Form 4 have been adjusted to reflect the Reverse Stock Split."}],"balance_after":8766,"source":{"system":"sec-edgar","filing":"0001453687-25-000015","document":"wk-form4_1736198338.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1492386/000145368725000015/wk-form4_1736198338.xml","form_type":"4"}},{"id":1687720,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70000,"kind":"person","name":"DeSilva Nishan M","position":1,"cik":"0001492386","reported_name":"DeSilva Nishan M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2024-01-04T17:05:35.000Z","date":"2024-01-02","kind":"grant","planned":false,"acquired":true,"shares":228000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This award will vest in 36 equal monthly installments, so that it shall be fully vested on January 2, 2027."}],"balance_after":228000,"derivative":{"exercise_price":0.6552,"expiration_date":"2034-01-01","underlying":"Common  Stock","underlying_shares":228000},"source":{"system":"sec-edgar","filing":"0001453687-24-000020","document":"wk-form4_1704405920.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1492386/000145368724000020/wk-form4_1704405920.xml","form_type":"4"}},{"id":1687719,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70000,"kind":"person","name":"DeSilva Nishan M","position":1,"cik":"0001492386","reported_name":"DeSilva Nishan M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-01-04T17:05:35.000Z","date":"2024-01-02","kind":"grant","planned":false,"acquired":true,"shares":178000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of common stock, which will vest in three equal annual installments so that the underlying shares will be fully vested on January 2, 2027."}],"balance_after":185000,"source":{"system":"sec-edgar","filing":"0001453687-24-000020","document":"wk-form4_1704405920.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1492386/000145368724000020/wk-form4_1704405920.xml","form_type":"4"}},{"id":1740642,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70000,"kind":"person","name":"DeSilva Nishan M","position":1,"cik":"0001492386","reported_name":"DeSilva Nishan M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2023-11-15T17:18:52.000Z","date":"2023-11-13","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":75000,"price":0.93,"value":69750.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This option, which provided for vesting in full on January 2, 2024, was canceled in the Merger in exchange for a cash payment of $69,750, representing the difference between the exercise price of the option and $2.06, the Cash-out Amount as applied in the Merger."}],"balance_after":0,"derivative":{"exercise_price":1.13,"expiration_date":"2033-01-01","underlying":"Common Stock","underlying_shares":75000},"source":{"system":"sec-edgar","filing":"0001453687-23-000086","document":"wk-form4_1700086723.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1492386/000145368723000086/wk-form4_1700086723.xml","form_type":"4"}},{"id":1740641,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70000,"kind":"person","name":"DeSilva Nishan M","position":1,"cik":"0001492386","reported_name":"DeSilva Nishan M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2023-11-15T17:18:52.000Z","date":"2023-11-13","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":40000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This option, which provided for vesting in full on January 3, 2023, was canceled in the Merger."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option, which provided for vesting in full on January 3, 2023, was canceled in the Merger."}],"balance_after":0,"derivative":{"exercise_price":3.31,"expiration_date":"2032-01-02","underlying":"Common Stock","underlying_shares":40000},"source":{"system":"sec-edgar","filing":"0001453687-23-000086","document":"wk-form4_1700086723.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1492386/000145368723000086/wk-form4_1700086723.xml","form_type":"4"}},{"id":1740640,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70000,"kind":"person","name":"DeSilva Nishan M","position":1,"cik":"0001492386","reported_name":"DeSilva Nishan M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2023-11-15T17:18:52.000Z","date":"2023-11-13","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":80000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This option, which provided for vesting in thirty-six (36) substantially equal monthly installments over three years following the date of grant on June 23, 2021, was canceled in the merger (the \"Merger\") between Selecta Biosciences, Inc. and Cartesian Therapeutics, Inc."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option, which provided for vesting in thirty-six (36) substantially equal monthly installments over three years following the date of grant on June 23, 2021, was canceled in the merger (the \"Merger\") between Selecta Biosciences, Inc. and Cartesian Therapeutics, Inc."}],"balance_after":0,"derivative":{"exercise_price":4.57,"expiration_date":"2031-06-22","underlying":"Common Stock","underlying_shares":80000},"source":{"system":"sec-edgar","filing":"0001453687-23-000086","document":"wk-form4_1700086723.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1492386/000145368723000086/wk-form4_1700086723.xml","form_type":"4"}},{"id":2067415,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70000,"kind":"person","name":"DeSilva Nishan M","position":1,"cik":"0001492386","reported_name":"DeSilva Nishan M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2023-01-04T17:02:30.000Z","date":"2023-01-02","kind":"grant","acquired":true,"shares":75000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Common Stock underlying this award will vest in full on January 2, 2024."}],"balance_after":75000,"derivative":{"exercise_price":1.13,"expiration_date":"2033-01-01","underlying":"Common Stock","underlying_shares":75000},"source":{"system":"sec-edgar","filing":"0001453687-23-000020","document":"wf-form4_167286972909668.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1492386/000145368723000020/wf-form4_167286972909668.xml","form_type":"4"}},{"id":2443857,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70000,"kind":"person","name":"DeSilva Nishan M","position":1,"cik":"0001492386","reported_name":"DeSilva Nishan M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2022-01-05T16:33:33.000Z","date":"2022-01-03","kind":"grant","acquired":true,"shares":40000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Common Stock underlying this award will vest in full on January 3, 2023."}],"balance_after":40000,"derivative":{"exercise_price":3.31,"expiration_date":"2032-01-02","underlying":"Common Stock","underlying_shares":40000},"source":{"system":"sec-edgar","filing":"0001453687-22-000018","document":"wf-form4_164141836846044.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1492386/000145368722000018/wf-form4_164141836846044.xml","form_type":"4"}},{"id":2483722,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70000,"kind":"person","name":"DeSilva Nishan M","position":1,"cik":"0001492386","reported_name":"DeSilva Nishan M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-12-06T16:25:25.000Z","date":"2021-12-02","kind":"purchase","acquired":true,"shares":7000,"price":2.9604,"value":20722.8,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported is a weighted average price. The shares were purchased in multiple transactions at per share prices ranging from $2.8999 to $2.9899. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote."}],"balance_after":7000,"source":{"system":"sec-edgar","filing":"0001453687-21-000163","document":"wf-form4_163882590930406.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1492386/000145368721000163/wf-form4_163882590930406.xml","form_type":"4"}},{"id":2637019,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70000,"kind":"person","name":"DeSilva Nishan M","position":1,"cik":"0001492386","reported_name":"DeSilva Nishan M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2021-07-09T16:21:24.000Z","date":"2021-06-23","kind":"grant","acquired":true,"shares":80000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option vests in thirty-six (36) substantially equal monthly installments over three years following the date of grant."}],"balance_after":80000,"derivative":{"exercise_price":4.57,"expiration_date":"2031-06-22","underlying":"Common Stock","underlying_shares":80000},"source":{"system":"sec-edgar","filing":"0001453687-21-000090","document":"wf-form4_162586206787394.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1492386/000145368721000090/wf-form4_162586206787394.xml","form_type":"4"}}]}