{"transactions":[{"id":814410,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":53584,"kind":"person","name":"Hoge Elizabeth","position":1,"cik":"0002000987","reported_name":"Hoge Elizabeth","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":53585,"kind":"organization","name":"Seven One Eight Three Four Irrevocable Trust","position":2,"cik":"0002000959","reported_name":"Seven One Eight Three Four Irrevocable Trust","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A Non-Voting Convertible Preferred Stock","published_at":"2026-04-06T20:28:25.000Z","date":"2026-04-02","kind":"exercise","planned":false,"acquired":false,"shares":22740.03,"ownership":{"direct":false,"nature":"as trustee"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"On April 2, 2026, Seven One Eight Three Four Irrevocable Trust (the \"Trust\") elected to convert a portion of its shares of the issuer's Series A Non-Voting Convertible Preferred Stock into shares of the issuer's common stock. The remaining shares of the issuer's Series A Non-Voting Convertible Preferred Stock held by the Trust are subject to a beneficial ownership limitation."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On November 13, 2023, the issuer acquired the private Delaware corporation which was then known as Cartesian Therapeutics, Inc. in accordance with the terms of an Agreement and Plan of Merger, dated November 13, 2023 (the \"Merger\"). These securities represent merger consideration payable as a result of the closing of the Merger and securities purchased in a private placement in November 2023."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On April 2, 2026, Seven One Eight Three Four Irrevocable Trust (the \"Trust\") elected to convert a portion of its shares of the issuer's Series A Non-Voting Convertible Preferred Stock into shares of the issuer's common stock. The remaining shares of the issuer's Series A Non-Voting Convertible Preferred Stock held by the Trust are subject to a beneficial ownership limitation."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On April 2, 2026, Seven One Eight Three Four Irrevocable Trust (the \"Trust\") elected to convert a portion of its shares of the issuer's Series A Non-Voting Convertible Preferred Stock into shares of the issuer's common stock. The remaining shares of the issuer's Series A Non-Voting Convertible Preferred Stock held by the Trust are subject to a beneficial ownership limitation."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares are held by the Trust. The reporting person is a trustee of the Trust."}],"balance_after":33662.224,"derivative":{"underlying":"Common Stock","underlying_shares":758001},"source":{"system":"sec-edgar","filing":"0002064832-26-000149","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000206483226000149/form4.xml","form_type":"4"}},{"id":814409,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":53584,"kind":"person","name":"Hoge Elizabeth","position":1,"cik":"0002000987","reported_name":"Hoge Elizabeth","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":53585,"kind":"organization","name":"Seven One Eight Three Four Irrevocable Trust","position":2,"cik":"0002000959","reported_name":"Seven One Eight Three Four Irrevocable Trust","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-04-06T20:28:25.000Z","date":"2026-04-02","kind":"exercise","planned":false,"acquired":true,"shares":758001,"ownership":{"direct":false,"nature":"as trustee"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On April 2, 2026, Seven One Eight Three Four Irrevocable Trust (the \"Trust\") elected to convert a portion of its shares of the issuer's Series A Non-Voting Convertible Preferred Stock into shares of the issuer's common stock. The remaining shares of the issuer's Series A Non-Voting Convertible Preferred Stock held by the Trust are subject to a beneficial ownership limitation."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares are held by the Trust. The reporting person is a trustee of the Trust."}],"balance_after":5313261,"source":{"system":"sec-edgar","filing":"0002064832-26-000149","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000206483226000149/form4.xml","form_type":"4"}},{"id":814408,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":53583,"kind":"person","name":"Kalayoglu Murat","position":1,"cik":"0002000002","reported_name":"Kalayoglu Murat","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A Non-Voting Convertible Preferred Stock","published_at":"2026-04-06T20:28:06.000Z","date":"2026-04-02","kind":"exercise","planned":false,"acquired":false,"shares":22740.03,"ownership":{"direct":false,"nature":"by trust"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"On April 2, 2026, a trust (the \"Trust\") for the benefit of the reporting person's spouse and children elected to convert a portion of its shares of the issuer's Series A Non-Voting Convertible Preferred Stock into shares of the issuer's common stock. The remaining shares of the issuer's Series A Non-Voting Convertible Preferred Stock held by the Trust are subject to a beneficial ownership limitation."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On November 13, 2023, the issuer acquired the private Delaware corporation which was then known as Cartesian Therapeutics, Inc. in accordance with the terms of an Agreement and Plan of Merger, dated November 13, 2023 (the \"Merger\"). These securities represent merger consideration payable as a result of the closing of the Merger and securities purchased in a private placement in November 2023."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On April 2, 2026, a trust (the \"Trust\") for the benefit of the reporting person's spouse and children elected to convert a portion of its shares of the issuer's Series A Non-Voting Convertible Preferred Stock into shares of the issuer's common stock. The remaining shares of the issuer's Series A Non-Voting Convertible Preferred Stock held by the Trust are subject to a beneficial ownership limitation."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On April 2, 2026, a trust (the \"Trust\") for the benefit of the reporting person's spouse and children elected to convert a portion of its shares of the issuer's Series A Non-Voting Convertible Preferred Stock into shares of the issuer's common stock. The remaining shares of the issuer's Series A Non-Voting Convertible Preferred Stock held by the Trust are subject to a beneficial ownership limitation."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares are held by the Trust for the benefit of the reporting person's spouse and children. The reporting person's spouse is a trustee of the Trust."}],"balance_after":33662.224,"derivative":{"underlying":"Common Stock","underlying_shares":758001},"source":{"system":"sec-edgar","filing":"0002064832-26-000148","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000206483226000148/form4.xml","form_type":"4"}},{"id":814407,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":53583,"kind":"person","name":"Kalayoglu Murat","position":1,"cik":"0002000002","reported_name":"Kalayoglu Murat","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-04-06T20:28:06.000Z","date":"2026-04-02","kind":"exercise","planned":false,"acquired":true,"shares":758001,"ownership":{"direct":false,"nature":"by trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On April 2, 2026, a trust (the \"Trust\") for the benefit of the reporting person's spouse and children elected to convert a portion of its shares of the issuer's Series A Non-Voting Convertible Preferred Stock into shares of the issuer's common stock. The remaining shares of the issuer's Series A Non-Voting Convertible Preferred Stock held by the Trust are subject to a beneficial ownership limitation."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares are held by the Trust for the benefit of the reporting person's spouse and children. The reporting person's spouse is a trustee of the Trust."}],"balance_after":5313261,"source":{"system":"sec-edgar","filing":"0002064832-26-000148","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000206483226000148/form4.xml","form_type":"4"}},{"id":843848,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":60971,"kind":"person","name":"Singer Michael","position":1,"cik":"0002000122","reported_name":"Singer Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common  Stock","published_at":"2026-03-13T20:14:52.000Z","date":"2026-03-13","kind":"gift","planned":false,"acquired":false,"shares":6555,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":49578,"source":{"system":"sec-edgar","filing":"0001453687-26-000066","document":"wk-form4_1773432889.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000066/wk-form4_1773432889.xml","form_type":"4"}},{"id":943142,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69763,"kind":"person","name":"Miljkovic Milos","position":1,"cik":"0002000282","reported_name":"Miljkovic Milos","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common  Stock","published_at":"2026-01-08T21:19:56.000Z","date":"2026-01-06","kind":"sale","planned":false,"acquired":false,"shares":3573,"price":6.8197,"value":24366.7881,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":58820,"source":{"system":"sec-edgar","filing":"0001453687-26-000046","document":"wk-form4_1767907193.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000046/wk-form4_1767907193.xml","form_type":"4"}},{"id":943141,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69762,"kind":"person","name":"Davis Blaine","position":1,"cik":"0001802188","reported_name":"Davis Blaine","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common  Stock","published_at":"2026-01-08T21:19:50.000Z","date":"2026-01-06","kind":"sale","planned":false,"acquired":false,"shares":10591,"price":6.8197,"value":72227.4427,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":121220,"source":{"system":"sec-edgar","filing":"0001453687-26-000045","document":"wk-form4_1767907186.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000045/wk-form4_1767907186.xml","form_type":"4"}},{"id":943290,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69769,"kind":"person","name":"Brunn Carsten","position":1,"cik":"0001760229","reported_name":"Brunn Carsten","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-01-08T16:20:02.000Z","date":"2026-01-06","kind":"sale","planned":false,"acquired":false,"shares":23766,"price":6.8197,"value":162076.9902,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":323530,"source":{"system":"sec-edgar","filing":"0001453687-26-000047","document":"wk-form4_1767907199.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1760229/000145368726000047/wk-form4_1767907199.xml","form_type":"4"}},{"id":946577,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69990,"kind":"person","name":"Malik Kemal","position":1,"cik":"0001797921","reported_name":"Malik Kemal","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2026-01-06T21:19:14.000Z","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":"0001453687-26-000037","document":"wk-form4_1767734348.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000037/wk-form4_1767734348.xml","form_type":"4"}},{"id":946576,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69990,"kind":"person","name":"Malik Kemal","position":1,"cik":"0001797921","reported_name":"Malik Kemal","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common  Stock","published_at":"2026-01-06T21:19:14.000Z","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":11133,"source":{"system":"sec-edgar","filing":"0001453687-26-000037","document":"wk-form4_1767734348.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000037/wk-form4_1767734348.xml","form_type":"4"}},{"id":946575,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69763,"kind":"person","name":"Miljkovic Milos","position":1,"cik":"0002000282","reported_name":"Miljkovic Milos","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Employee Stock Option (right to buy)","published_at":"2026-01-06T21:19:04.000Z","date":"2026-01-02","kind":"grant","planned":false,"acquired":true,"shares":77000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option vests as to 25% on January 2, 2027. The remainder of the underlying shares will vest in 36 equal monthly installments thereafter."}],"balance_after":77000,"derivative":{"exercise_price":6.76,"expiration_date":"2036-01-01","underlying":"Common  Stock","underlying_shares":77000},"source":{"system":"sec-edgar","filing":"0001453687-26-000036","document":"wk-form4_1767734342.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000036/wk-form4_1767734342.xml","form_type":"4"}},{"id":946574,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69763,"kind":"person","name":"Miljkovic Milos","position":1,"cik":"0002000282","reported_name":"Miljkovic Milos","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common  Stock","published_at":"2026-01-06T21:19:04.000Z","date":"2026-01-02","kind":"grant","planned":false,"acquired":true,"shares":27000,"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 as to 25% on January 2, 2027. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2030."}],"balance_after":62393,"source":{"system":"sec-edgar","filing":"0001453687-26-000036","document":"wk-form4_1767734342.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000036/wk-form4_1767734342.xml","form_type":"4"}},{"id":946579,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69762,"kind":"person","name":"Davis Blaine","position":1,"cik":"0001802188","reported_name":"Davis Blaine","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Employee Stock Option (right to buy)","published_at":"2026-01-06T21:18:46.000Z","date":"2026-01-02","kind":"grant","planned":false,"acquired":true,"shares":109000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option vests as to 25% on January 2, 2027. The remainder of the underlying shares will vest in 36 equal monthly installments thereafter."}],"balance_after":109000,"derivative":{"exercise_price":6.76,"expiration_date":"2036-01-01","underlying":"Common  Stock","underlying_shares":109000},"source":{"system":"sec-edgar","filing":"0001453687-26-000033","document":"wk-form4_1767734322.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000033/wk-form4_1767734322.xml","form_type":"4"}},{"id":946578,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69762,"kind":"person","name":"Davis Blaine","position":1,"cik":"0001802188","reported_name":"Davis Blaine","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common  Stock","published_at":"2026-01-06T21:18:46.000Z","date":"2026-01-02","kind":"grant","planned":false,"acquired":true,"shares":37000,"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 as to 25% on January 2, 2027. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2030."}],"balance_after":131811,"source":{"system":"sec-edgar","filing":"0001453687-26-000033","document":"wk-form4_1767734322.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000033/wk-form4_1767734322.xml","form_type":"4"}},{"id":946573,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":28773,"kind":"person","name":"BARABE TIMOTHY C","position":1,"cik":"0001237409","reported_name":"BARABE TIMOTHY C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2026-01-06T21:18:38.000Z","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":"0001453687-26-000032","document":"wk-form4_1767734312.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000032/wk-form4_1767734312.xml","form_type":"4"}},{"id":946572,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":28773,"kind":"person","name":"BARABE TIMOTHY C","position":1,"cik":"0001237409","reported_name":"BARABE TIMOTHY C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-01-06T21:18:38.000Z","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":56966,"source":{"system":"sec-edgar","filing":"0001453687-26-000032","document":"wk-form4_1767734312.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000032/wk-form4_1767734312.xml","form_type":"4"}},{"id":946571,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":60971,"kind":"person","name":"Singer Michael","position":1,"cik":"0002000122","reported_name":"Singer Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2026-01-06T21:18:19.000Z","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":"0001453687-26-000030","document":"wk-form4_1767734296.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000030/wk-form4_1767734296.xml","form_type":"4"}},{"id":946570,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":60971,"kind":"person","name":"Singer Michael","position":1,"cik":"0002000122","reported_name":"Singer Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common  Stock","published_at":"2026-01-06T21:18:19.000Z","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":56133,"source":{"system":"sec-edgar","filing":"0001453687-26-000030","document":"wk-form4_1767734296.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000030/wk-form4_1767734296.xml","form_type":"4"}},{"id":947732,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2026-01-06T21:18:13.000Z","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":"0001453687-26-000029","document":"wk-form4_1767734290.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368726000029/wk-form4_1767734290.xml","form_type":"4"}},{"id":947731,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-01-06T21:18:13.000Z","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":8646285,"source":{"system":"sec-edgar","filing":"0001453687-26-000029","document":"wk-form4_1767734290.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368726000029/wk-form4_1767734290.xml","form_type":"4"}},{"id":946568,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":53583,"kind":"person","name":"Kalayoglu Murat","position":1,"cik":"0002000002","reported_name":"Kalayoglu Murat","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2026-01-06T21:18:07.000Z","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":"0001453687-26-000028","document":"wk-form4_1767734285.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000028/wk-form4_1767734285.xml","form_type":"4"}},{"id":946567,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":53583,"kind":"person","name":"Kalayoglu Murat","position":1,"cik":"0002000002","reported_name":"Kalayoglu Murat","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common  Stock","published_at":"2026-01-06T21:18:07.000Z","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":511577,"source":{"system":"sec-edgar","filing":"0001453687-26-000028","document":"wk-form4_1767734285.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368726000028/wk-form4_1767734285.xml","form_type":"4"}},{"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":946866,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69769,"kind":"person","name":"Brunn Carsten","position":1,"cik":"0001760229","reported_name":"Brunn Carsten","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (right to buy)","published_at":"2026-01-06T16:19:20.000Z","date":"2026-01-02","kind":"grant","planned":false,"acquired":true,"shares":415700,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option vests as to 25% on January 2, 2027. The remainder of the underlying shares will vest in 36 equal monthly installments thereafter."}],"balance_after":415700,"derivative":{"exercise_price":6.76,"expiration_date":"2036-01-01","underlying":"Common  Stock","underlying_shares":415700},"source":{"system":"sec-edgar","filing":"0001453687-26-000038","document":"wk-form4_1767734357.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1760229/000145368726000038/wk-form4_1767734357.xml","form_type":"4"}},{"id":946865,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69769,"kind":"person","name":"Brunn Carsten","position":1,"cik":"0001760229","reported_name":"Brunn Carsten","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-01-06T16:19:20.000Z","date":"2026-01-02","kind":"grant","planned":false,"acquired":true,"shares":143200,"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 as to 25% on January 2, 2027. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2030."}],"balance_after":347296,"source":{"system":"sec-edgar","filing":"0001453687-26-000038","document":"wk-form4_1767734357.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1760229/000145368726000038/wk-form4_1767734357.xml","form_type":"4"}},{"id":947570,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70084,"kind":"person","name":"ZENNER PATRICK J","position":1,"cik":"0001139036","reported_name":"ZENNER PATRICK J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2026-01-06T16:18:59.000Z","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":"0001453687-26-000035","document":"wk-form4_1767734336.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1139036/000145368726000035/wk-form4_1767734336.xml","form_type":"4"}},{"id":947569,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70084,"kind":"person","name":"ZENNER PATRICK J","position":1,"cik":"0001139036","reported_name":"ZENNER PATRICK J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-01-06T16:18:59.000Z","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":12974,"source":{"system":"sec-edgar","filing":"0001453687-26-000035","document":"wk-form4_1767734336.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1139036/000145368726000035/wk-form4_1767734336.xml","form_type":"4"}},{"id":947463,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70081,"kind":"person","name":"Seymour June Ann","position":1,"cik":"0002093716","reported_name":"Seymour June Ann","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Employee Stock Option (right to buy)","published_at":"2026-01-06T16:18:53.000Z","date":"2026-01-02","kind":"grant","planned":false,"acquired":true,"shares":19000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option vests as to 25% on January 2, 2027. The remainder of the underlying shares will vest in 36 equal monthly installments thereafter."}],"balance_after":19000,"derivative":{"exercise_price":6.76,"expiration_date":"2036-01-01","underlying":"Common  Stock","underlying_shares":19000},"source":{"system":"sec-edgar","filing":"0001453687-26-000034","document":"wk-form4_1767734330.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2093716/000145368726000034/wk-form4_1767734330.xml","form_type":"4"}},{"id":947462,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70081,"kind":"person","name":"Seymour June Ann","position":1,"cik":"0002093716","reported_name":"Seymour June Ann","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Common  Stock","published_at":"2026-01-06T16:18:53.000Z","date":"2026-01-02","kind":"grant","planned":false,"acquired":true,"shares":6500,"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 as to 25% on January 2, 2027. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2030."}],"balance_after":6500,"source":{"system":"sec-edgar","filing":"0001453687-26-000034","document":"wk-form4_1767734330.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2093716/000145368726000034/wk-form4_1767734330.xml","form_type":"4"}},{"id":947282,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Employee Stock Option (right to buy)","published_at":"2026-01-06T16:18:28.000Z","date":"2026-01-02","kind":"grant","planned":false,"acquired":true,"shares":71000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option vests as to 25% on January 2, 2027. The remainder of the underlying shares will vest in 36 equal monthly installments thereafter."}],"balance_after":71000,"derivative":{"exercise_price":6.76,"expiration_date":"2036-01-01","underlying":"Common  Stock","underlying_shares":71000},"source":{"system":"sec-edgar","filing":"0001453687-26-000031","document":"wk-form4_1767734302.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368726000031/wk-form4_1767734302.xml","form_type":"4"}},{"id":947281,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Common  Stock","published_at":"2026-01-06T16:18:28.000Z","date":"2026-01-02","kind":"grant","planned":false,"acquired":true,"shares":24000,"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 as to 25% on January 2, 2027. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2030."}],"balance_after":94226,"source":{"system":"sec-edgar","filing":"0001453687-26-000031","document":"wk-form4_1767734302.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368726000031/wk-form4_1767734302.xml","form_type":"4"}},{"id":955372,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2026-01-02T16:03:30.000Z","date":"2025-12-30","kind":"exercise","planned":false,"acquired":false,"shares":7500,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"On November 13, 2023, the issuer acquired the Delaware corporation which was then-known as Cartesian Therapeutics, Inc. (\"Old Cartesian\") in accordance with the terms of an Agreement and Plan of Merger, dated November 13, 2023. Options to purchase Old Cartesian common stock held by the reporting person were converted into options to purchase shares of the issuer's common stock in connection with the merger."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options are currently fully vested and exercisable."}],"balance_after":19369,"derivative":{"exercise_price":3.3,"expiration_date":"2031-04-25","underlying":"Common  Stock","underlying_shares":7500},"source":{"system":"sec-edgar","filing":"0001453687-26-000002","document":"wk-form4_1767387807.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368726000002/wk-form4_1767387807.xml","form_type":"4"}},{"id":955371,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Common  Stock","published_at":"2026-01-02T16:03:30.000Z","date":"2025-12-30","kind":"exercise","planned":false,"acquired":true,"shares":7500,"price":3.3,"value":24750.0,"ownership":{"direct":true},"balance_after":70226,"source":{"system":"sec-edgar","filing":"0001453687-26-000002","document":"wk-form4_1767387807.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368726000002/wk-form4_1767387807.xml","form_type":"4"}},{"id":963084,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":71193,"kind":"person","name":"Bot Adrian Ion","position":1,"cik":"0002101801","reported_name":"Bot Adrian Ion","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T22:05:19.000Z","date":"2025-12-16","kind":"grant","planned":false,"acquired":true,"shares":17200,"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 December 16, 2028."}],"balance_after":17200,"derivative":{"exercise_price":8.29,"expiration_date":"2035-12-15","underlying":"Common  Stock","underlying_shares":17200},"source":{"system":"sec-edgar","filing":"0001453687-25-000144","document":"wk-form4_1766095515.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000144/wk-form4_1766095515.xml","form_type":"4"}},{"id":963083,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":71193,"kind":"person","name":"Bot Adrian Ion","position":1,"cik":"0002101801","reported_name":"Bot Adrian Ion","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common  Stock","published_at":"2025-12-18T22:05:19.000Z","date":"2025-12-16","kind":"grant","planned":false,"acquired":true,"shares":5800,"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 following the date of grant so that the underlying shares will be fully vested on December 16, 2028."}],"balance_after":5800,"source":{"system":"sec-edgar","filing":"0001453687-25-000144","document":"wk-form4_1766095515.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000144/wk-form4_1766095515.xml","form_type":"4"}},{"id":977539,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":28773,"kind":"person","name":"BARABE TIMOTHY C","position":1,"cik":"0001237409","reported_name":"BARABE TIMOTHY C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-12-08T21:07:12.000Z","date":"2025-12-04","kind":"purchase","planned":false,"acquired":true,"shares":30000,"price":6.8599,"value":205797.0,"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 $6.80 to $6.90. 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":54366,"source":{"system":"sec-edgar","filing":"0001453687-25-000132","document":"wk-form4_1765228029.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000132/wk-form4_1765228029.xml","form_type":"4"}},{"id":983855,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-02T16:02:47.000Z","date":"2025-11-28","kind":"exercise","planned":false,"acquired":false,"shares":7500,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"On November 13, 2023, the issuer acquired the Delaware corporation which was then-known as Cartesian Therapeutics, Inc. (\"Old Cartesian\") in accordance with the terms of an Agreement and Plan of Merger, dated November 13, 2023. Options to purchase Old Cartesian common stock held by the reporting person were converted into options to purchase shares of the issuer's common stock in connection with the merger."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options are currently fully vested and exercisable."}],"balance_after":26869,"derivative":{"exercise_price":3.3,"expiration_date":"2031-04-25","underlying":"Common  Stock","underlying_shares":7500},"source":{"system":"sec-edgar","filing":"0001453687-25-000130","document":"wk-form4_1764709364.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368725000130/wk-form4_1764709364.xml","form_type":"4"}},{"id":983854,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Common  Stock","published_at":"2025-12-02T16:02:47.000Z","date":"2025-11-28","kind":"exercise","planned":false,"acquired":true,"shares":7500,"price":3.3,"value":24750.0,"ownership":{"direct":true},"balance_after":62726,"source":{"system":"sec-edgar","filing":"0001453687-25-000130","document":"wk-form4_1764709364.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368725000130/wk-form4_1764709364.xml","form_type":"4"}},{"id":993723,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":60971,"kind":"person","name":"Singer Michael","position":1,"cik":"0002000122","reported_name":"Singer Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common  Stock","published_at":"2025-11-19T23:35:47.000Z","date":"2025-11-18","kind":"gift","planned":false,"acquired":false,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":53533,"source":{"system":"sec-edgar","filing":"0001453687-25-000127","document":"wk-form4_1763595344.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000127/wk-form4_1763595344.xml","form_type":"4"}},{"id":1012706,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70081,"kind":"person","name":"Seymour June Ann","position":1,"cik":"0002093716","reported_name":"Seymour June Ann","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Employee Stock Option (right to buy)","published_at":"2025-10-28T16:05:51.000Z","date":"2025-10-27","kind":"grant","planned":false,"acquired":true,"shares":50000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option vests as to 25% on October 27, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on October 27, 2029."}],"balance_after":50000,"derivative":{"exercise_price":8.85,"expiration_date":"2035-10-27","underlying":"Common  Stock","underlying_shares":50000},"source":{"system":"sec-edgar","filing":"0001453687-25-000112","document":"wk-form4_1761681948.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2093716/000145368725000112/wk-form4_1761681948.xml","form_type":"4"}},{"id":1149527,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-05-14T16:15:52.000Z","date":"2025-05-12","kind":"exercise","planned":false,"acquired":false,"shares":7500,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"On November 13, 2023, the issuer acquired the Delaware corporation which was then-known as Cartesian Therapeutics, Inc. (\"Old Cartesian\") in accordance with the terms of an Agreement and Plan of Merger, dated November 13, 2023. Options to purchase Old Cartesian common stock held by the reporting person were converted into options to purchase shares of the issuer's common stock in connection with the merger."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options are currently fully vested and exercisable."}],"balance_after":34369,"derivative":{"exercise_price":3.3,"expiration_date":"2031-04-25","underlying":"Common  Stock","underlying_shares":7500},"source":{"system":"sec-edgar","filing":"0001453687-25-000089","document":"wk-form4_1747253745.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368725000089/wk-form4_1747253745.xml","form_type":"4"}},{"id":1149526,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Common  Stock","published_at":"2025-05-14T16:15:52.000Z","date":"2025-05-12","kind":"exercise","planned":false,"acquired":true,"shares":7500,"price":3.3,"value":24750.0,"ownership":{"direct":true},"balance_after":55226,"source":{"system":"sec-edgar","filing":"0001453687-25-000089","document":"wk-form4_1747253745.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368725000089/wk-form4_1747253745.xml","form_type":"4"}},{"id":1171126,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-04-16T16:35:51.000Z","date":"2025-04-15","kind":"exercise","planned":false,"acquired":false,"shares":7500,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"On November 13, 2023, the issuer acquired the Delaware corporation which was then-known as Cartesian Therapeutics, Inc. (\"Old Cartesian\") in accordance with the terms of an Agreement and Plan of Merger, dated November 13, 2023. Options to purchase Old Cartesian common stock held by the reporting person were converted into options to purchase shares of the issuer's common stock in connection with the merger."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options are currently fully vested and exercisable."}],"balance_after":41869,"derivative":{"exercise_price":3.3,"expiration_date":"2031-04-25","underlying":"Common  Stock","underlying_shares":7500},"source":{"system":"sec-edgar","filing":"0001453687-25-000068","document":"wk-form4_1744835744.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368725000068/wk-form4_1744835744.xml","form_type":"4"}},{"id":1171125,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Common  Stock","published_at":"2025-04-16T16:35:51.000Z","date":"2025-04-15","kind":"exercise","planned":false,"acquired":true,"shares":7500,"price":3.3,"value":24750.0,"ownership":{"direct":true},"balance_after":47726,"source":{"system":"sec-edgar","filing":"0001453687-25-000068","document":"wk-form4_1744835744.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368725000068/wk-form4_1744835744.xml","form_type":"4"}},{"id":1173556,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-04-11T21:29:40.000Z","date":"2025-04-11","kind":"purchase","planned":false,"acquired":true,"shares":36338,"price":10.7726,"value":391454.7388,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported is a weighted average price. The shares were purchased in multiple transactions at per share prices ranging from $10.395 to $11.00. 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by TAS Partners LLC. The reporting person is the managing member of TAS Partners LLC. The reporting person disclaims beneficial ownership of the securities held by TAS Partners LLC except to the extent of his pecuniary interest therein, if any."}],"balance_after":656513,"source":{"system":"sec-edgar","filing":"0001453687-25-000066","document":"wk-form4_1744406973.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000066/wk-form4_1744406973.xml","form_type":"4"}},{"id":1173555,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-04-11T21:29:40.000Z","date":"2025-04-11","kind":"purchase","planned":false,"acquired":true,"shares":6412,"price":10.7726,"value":69073.9112,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported is a weighted average price. The shares were purchased in multiple transactions at per share prices ranging from $10.395 to $11.00. 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":8643685,"source":{"system":"sec-edgar","filing":"0001453687-25-000066","document":"wk-form4_1744406973.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000066/wk-form4_1744406973.xml","form_type":"4"}},{"id":1173554,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-04-11T21:29:40.000Z","date":"2025-04-10","kind":"purchase","planned":false,"acquired":true,"shares":3451,"price":10.9231,"value":37695.6181,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by TAS Partners LLC. The reporting person is the managing member of TAS Partners LLC. The reporting person disclaims beneficial ownership of the securities held by TAS Partners LLC except to the extent of his pecuniary interest therein, if any."}],"balance_after":620175,"source":{"system":"sec-edgar","filing":"0001453687-25-000066","document":"wk-form4_1744406973.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000066/wk-form4_1744406973.xml","form_type":"4"}},{"id":1173553,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-04-11T21:29:40.000Z","date":"2025-04-10","kind":"purchase","planned":false,"acquired":true,"shares":45144,"price":10.4345,"value":471055.068,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported is a weighted average price. The shares were purchased in multiple transactions at per share prices ranging from $9.918 to $10.7461. 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by TAS Partners LLC. The reporting person is the managing member of TAS Partners LLC. The reporting person disclaims beneficial ownership of the securities held by TAS Partners LLC except to the extent of his pecuniary interest therein, if any."}],"balance_after":616724,"source":{"system":"sec-edgar","filing":"0001453687-25-000066","document":"wk-form4_1744406973.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000066/wk-form4_1744406973.xml","form_type":"4"}},{"id":1173552,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-04-11T21:29:40.000Z","date":"2025-04-10","kind":"purchase","planned":false,"acquired":true,"shares":609,"price":10.9231,"value":6652.1679,"ownership":{"direct":true},"balance_after":8637273,"source":{"system":"sec-edgar","filing":"0001453687-25-000066","document":"wk-form4_1744406973.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000066/wk-form4_1744406973.xml","form_type":"4"}},{"id":1173551,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-04-11T21:29:40.000Z","date":"2025-04-10","kind":"purchase","planned":false,"acquired":true,"shares":7966,"price":10.4345,"value":83121.227,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported is a weighted average price. The shares were purchased in multiple transactions at per share prices ranging from $9.918 to $10.7461. 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":8636664,"source":{"system":"sec-edgar","filing":"0001453687-25-000066","document":"wk-form4_1744406973.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000066/wk-form4_1744406973.xml","form_type":"4"}},{"id":1173550,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-04-11T21:29:40.000Z","date":"2025-04-09","kind":"purchase","planned":false,"acquired":true,"shares":178,"price":9.9509,"value":1771.2602,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. The shares were purchased in multiple transactions at per share prices ranging from $9.95 to $9.97. 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by TAS Partners LLC. The reporting person is the managing member of TAS Partners LLC. The reporting person disclaims beneficial ownership of the securities held by TAS Partners LLC except to the extent of his pecuniary interest therein, if any."}],"balance_after":571580,"source":{"system":"sec-edgar","filing":"0001453687-25-000066","document":"wk-form4_1744406973.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000066/wk-form4_1744406973.xml","form_type":"4"}},{"id":1173549,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-04-11T21:29:40.000Z","date":"2025-04-09","kind":"purchase","planned":false,"acquired":true,"shares":41604,"price":9.4264,"value":392175.9456,"ownership":{"direct":false,"nature":"See Footnote"},"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 $8.95 to $9.91. 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by TAS Partners LLC. The reporting person is the managing member of TAS Partners LLC. The reporting person disclaims beneficial ownership of the securities held by TAS Partners LLC except to the extent of his pecuniary interest therein, if any."}],"balance_after":571402,"source":{"system":"sec-edgar","filing":"0001453687-25-000066","document":"wk-form4_1744406973.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000066/wk-form4_1744406973.xml","form_type":"4"}},{"id":1173548,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-04-11T21:29:40.000Z","date":"2025-04-09","kind":"purchase","planned":false,"acquired":true,"shares":31,"price":9.9509,"value":308.4779,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. The shares were purchased in multiple transactions at per share prices ranging from $9.95 to $9.97. 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":8628698,"source":{"system":"sec-edgar","filing":"0001453687-25-000066","document":"wk-form4_1744406973.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000066/wk-form4_1744406973.xml","form_type":"4"}},{"id":1173547,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-04-11T21:29:40.000Z","date":"2025-04-09","kind":"purchase","planned":false,"acquired":true,"shares":7342,"price":9.4264,"value":69208.6288,"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 $8.95 to $9.91. 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":8628667,"source":{"system":"sec-edgar","filing":"0001453687-25-000066","document":"wk-form4_1744406973.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000066/wk-form4_1744406973.xml","form_type":"4"}},{"id":1196024,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-03-20T23:50:25.000Z","date":"2025-03-20","kind":"purchase","planned":false,"acquired":true,"shares":54889,"price":15.5877,"value":855593.2653,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported is a weighted average price. The shares were purchased in multiple transactions at per share prices ranging from $15.00 to $15.9222. 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":8621325,"source":{"system":"sec-edgar","filing":"0001453687-25-000062","document":"wk-form4_1742514619.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000062/wk-form4_1742514619.xml","form_type":"4"}},{"id":1196023,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-03-20T23:50:25.000Z","date":"2025-03-19","kind":"purchase","planned":false,"acquired":true,"shares":20234,"price":14.9729,"value":302961.6586,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. The shares were purchased in multiple transactions at per share prices ranging from $14.85 to $15.00. 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":8566436,"source":{"system":"sec-edgar","filing":"0001453687-25-000062","document":"wk-form4_1742514619.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000062/wk-form4_1742514619.xml","form_type":"4"}},{"id":1196022,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-03-20T23:50:25.000Z","date":"2025-03-18","kind":"purchase","planned":false,"acquired":true,"shares":14740,"price":14.4233,"value":212599.442,"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 $13.7242 to $14.53. 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":8546202,"source":{"system":"sec-edgar","filing":"0001453687-25-000062","document":"wk-form4_1742514619.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000062/wk-form4_1742514619.xml","form_type":"4"}},{"id":1302836,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-01-15T21:08:27.000Z","date":"2025-01-14","kind":"purchase","planned":false,"acquired":true,"shares":4022,"price":18,"value":72396.0,"ownership":{"direct":true},"balance_after":8531462,"source":{"system":"sec-edgar","filing":"0001453687-25-000047","document":"wk-form4_1736975300.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000047/wk-form4_1736975300.xml","form_type":"4"}},{"id":1302835,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-01-15T21:08:27.000Z","date":"2025-01-13","kind":"purchase","planned":false,"acquired":true,"shares":8983,"price":17.7822,"value":159737.5026,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. The shares were purchased in multiple transactions at per share prices ranging from $17.40 to $18.00. 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":8527440,"source":{"system":"sec-edgar","filing":"0001453687-25-000047","document":"wk-form4_1736975300.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000047/wk-form4_1736975300.xml","form_type":"4"}},{"id":1302834,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-01-15T21:08:27.000Z","date":"2025-01-13","kind":"purchase","planned":false,"acquired":true,"shares":7962,"price":16.8576,"value":134220.2112,"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 $16.40 to $17.3124. 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":8518457,"source":{"system":"sec-edgar","filing":"0001453687-25-000047","document":"wk-form4_1736975300.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000047/wk-form4_1736975300.xml","form_type":"4"}},{"id":1304272,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":84184,"kind":"person","name":"Jewell Christopher M","position":1,"cik":"0002000226","reported_name":"Jewell Christopher M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-01-13T21:09:06.000Z","date":"2025-01-10","kind":"exercise","planned":false,"acquired":false,"shares":9000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"On November 13, 2023, the Issuer acquired the private Delaware corporation which was then known as Cartesian Therapeutics, Inc. (\"Old Cartesian\") in accordance with the terms of an Agreement and Plan of Merger, dated November 13, 2023. Options to purchase Old Cartesian common stock held by the reporting person were converted into options to purchase shares of the Issuer's Series A Preferred Stock in connection with the merger. On April 8, 2024, these options previously exercisable for shares of Series A Preferred Stock became exercisable solely for shares of the Issuer's Common Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option is currently exercisable for an additional 51,089 shares of Common Stock and becomes exercisable for an additional 2,969 shares of Common Stock each month until it is fully exercisable on June 16, 2025."}],"balance_after":67432,"derivative":{"exercise_price":3.23,"expiration_date":"2033-01-15","underlying":"Common  Stock","underlying_shares":9000},"source":{"system":"sec-edgar","filing":"0001453687-25-000045","document":"wk-form4_1736802540.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000045/wk-form4_1736802540.xml","form_type":"4"}},{"id":1304271,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":84184,"kind":"person","name":"Jewell Christopher M","position":1,"cik":"0002000226","reported_name":"Jewell Christopher M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common  Stock","published_at":"2025-01-13T21:09:06.000Z","date":"2025-01-10","kind":"exercise","planned":false,"acquired":true,"shares":9000,"price":3.23,"value":29070.0,"ownership":{"direct":true},"balance_after":62490,"source":{"system":"sec-edgar","filing":"0001453687-25-000045","document":"wk-form4_1736802540.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000045/wk-form4_1736802540.xml","form_type":"4"}},{"id":1307909,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":84326,"kind":"person","name":"Kurtoglu Metin","position":1,"cik":"0002000284","reported_name":"Kurtoglu Metin","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Common  Stock","published_at":"2025-01-08T01:05:42.000Z","date":"2025-01-06","kind":"sale","planned":false,"acquired":false,"shares":2458,"price":16.8322,"value":41373.5476,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":62258,"source":{"system":"sec-edgar","filing":"0001453687-25-000040","document":"wk-form4_1736298335.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000040/wk-form4_1736298335.xml","form_type":"4"}},{"id":1307908,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":84326,"kind":"person","name":"Kurtoglu Metin","position":1,"cik":"0002000284","reported_name":"Kurtoglu Metin","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Common  Stock","published_at":"2025-01-08T01:05:42.000Z","date":"2025-01-03","kind":"sale","planned":false,"acquired":false,"shares":2417,"price":16.7219,"value":40416.8323,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":64716,"source":{"system":"sec-edgar","filing":"0001453687-25-000040","document":"wk-form4_1736298335.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000040/wk-form4_1736298335.xml","form_type":"4"}},{"id":1307911,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69763,"kind":"person","name":"Miljkovic Milos","position":1,"cik":"0002000282","reported_name":"Miljkovic Milos","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common  Stock","published_at":"2025-01-08T01:05:31.000Z","date":"2025-01-06","kind":"sale","planned":false,"acquired":false,"shares":948,"price":16.8322,"value":15956.9256,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":35393,"source":{"system":"sec-edgar","filing":"0001453687-25-000039","document":"wk-form4_1736298325.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000039/wk-form4_1736298325.xml","form_type":"4"}},{"id":1307910,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69763,"kind":"person","name":"Miljkovic Milos","position":1,"cik":"0002000282","reported_name":"Miljkovic Milos","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common  Stock","published_at":"2025-01-08T01:05:31.000Z","date":"2025-01-03","kind":"sale","planned":false,"acquired":false,"shares":932,"price":16.7219,"value":15584.8108,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":36341,"source":{"system":"sec-edgar","filing":"0001453687-25-000039","document":"wk-form4_1736298325.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000039/wk-form4_1736298325.xml","form_type":"4"}},{"id":1307907,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":84184,"kind":"person","name":"Jewell Christopher M","position":1,"cik":"0002000226","reported_name":"Jewell Christopher M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common  Stock","published_at":"2025-01-08T01:05:21.000Z","date":"2025-01-06","kind":"sale","planned":false,"acquired":false,"shares":1286,"price":16.8322,"value":21646.2092,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":53490,"source":{"system":"sec-edgar","filing":"0001453687-25-000038","document":"wk-form4_1736298315.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000038/wk-form4_1736298315.xml","form_type":"4"}},{"id":1307906,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":84184,"kind":"person","name":"Jewell Christopher M","position":1,"cik":"0002000226","reported_name":"Jewell Christopher M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common  Stock","published_at":"2025-01-08T01:05:21.000Z","date":"2025-01-03","kind":"sale","planned":false,"acquired":false,"shares":1264,"price":16.7219,"value":21136.4816,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":54776,"source":{"system":"sec-edgar","filing":"0001453687-25-000038","document":"wk-form4_1736298315.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000038/wk-form4_1736298315.xml","form_type":"4"}},{"id":1307904,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69762,"kind":"person","name":"Davis Blaine","position":1,"cik":"0001802188","reported_name":"Davis Blaine","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common  Stock","published_at":"2025-01-08T01:04:49.000Z","date":"2025-01-06","kind":"sale","planned":false,"acquired":false,"shares":4028,"price":16.8322,"value":67800.1016,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":94811,"source":{"system":"sec-edgar","filing":"0001453687-25-000035","document":"wk-form4_1736298282.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000035/wk-form4_1736298282.xml","form_type":"4"}},{"id":1307903,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69762,"kind":"person","name":"Davis Blaine","position":1,"cik":"0001802188","reported_name":"Davis Blaine","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common  Stock","published_at":"2025-01-08T01:04:49.000Z","date":"2025-01-03","kind":"sale","planned":false,"acquired":false,"shares":3961,"price":16.7219,"value":66235.4459,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":98839,"source":{"system":"sec-edgar","filing":"0001453687-25-000035","document":"wk-form4_1736298282.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000035/wk-form4_1736298282.xml","form_type":"4"}},{"id":1308440,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Common  Stock","published_at":"2025-01-07T20:05:11.000Z","date":"2025-01-06","kind":"sale","planned":false,"acquired":false,"shares":906,"price":16.8322,"value":15249.9732,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":40226,"source":{"system":"sec-edgar","filing":"0001453687-25-000037","document":"wk-form4_1736298303.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368725000037/wk-form4_1736298303.xml","form_type":"4"}},{"id":1308439,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Common  Stock","published_at":"2025-01-07T20:05:11.000Z","date":"2025-01-03","kind":"sale","planned":false,"acquired":false,"shares":891,"price":16.7219,"value":14899.2129,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":41132,"source":{"system":"sec-edgar","filing":"0001453687-25-000037","document":"wk-form4_1736298303.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368725000037/wk-form4_1736298303.xml","form_type":"4"}},{"id":1308157,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69769,"kind":"person","name":"Brunn Carsten","position":1,"cik":"0001760229","reported_name":"Brunn Carsten","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2025-01-07T20:04:59.000Z","date":"2025-01-06","kind":"sale","planned":false,"acquired":false,"shares":8708,"price":16.8322,"value":146574.7976,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":204096,"source":{"system":"sec-edgar","filing":"0001453687-25-000036","document":"wk-form4_1736298292.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1760229/000145368725000036/wk-form4_1736298292.xml","form_type":"4"}},{"id":1308156,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69769,"kind":"person","name":"Brunn Carsten","position":1,"cik":"0001760229","reported_name":"Brunn Carsten","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2025-01-07T20:04:59.000Z","date":"2025-01-03","kind":"sale","planned":false,"acquired":false,"shares":8563,"price":16.7219,"value":143189.6297,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees."}],"balance_after":212804,"source":{"system":"sec-edgar","filing":"0001453687-25-000036","document":"wk-form4_1736298292.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1760229/000145368725000036/wk-form4_1736298292.xml","form_type":"4"}},{"id":1310439,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":84184,"kind":"person","name":"Jewell Christopher M","position":1,"cik":"0002000226","reported_name":"Jewell Christopher M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Employee Stock Option (right to buy)","published_at":"2025-01-06T21:21:16.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":47400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option vests as to 25% on January 2, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2029."}],"balance_after":47400,"derivative":{"exercise_price":16.93,"expiration_date":"2035-01-01","underlying":"Common  Stock","underlying_shares":47400},"source":{"system":"sec-edgar","filing":"0001453687-25-000027","document":"wk-form4_1736198467.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000027/wk-form4_1736198467.xml","form_type":"4"}},{"id":1310438,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":84184,"kind":"person","name":"Jewell Christopher M","position":1,"cik":"0002000226","reported_name":"Jewell Christopher M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common  Stock","published_at":"2025-01-06T21:21:16.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":16100,"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 as to 25% on January 2, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2029."}],"balance_after":56040,"source":{"system":"sec-edgar","filing":"0001453687-25-000027","document":"wk-form4_1736198467.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000027/wk-form4_1736198467.xml","form_type":"4"}},{"id":1310436,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69762,"kind":"person","name":"Davis Blaine","position":1,"cik":"0001802188","reported_name":"Davis Blaine","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Employee Stock Option (right to buy)","published_at":"2025-01-06T21:20:53.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":64600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This option vests as to 25% on January 2, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2029."}],"balance_after":64600,"derivative":{"exercise_price":16.93,"expiration_date":"2035-01-01","underlying":"Common  Stock","underlying_shares":64600},"source":{"system":"sec-edgar","filing":"0001453687-25-000025","document":"wk-form4_1736198446.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000025/wk-form4_1736198446.xml","form_type":"4"}},{"id":1310435,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69762,"kind":"person","name":"Davis Blaine","position":1,"cik":"0001802188","reported_name":"Davis Blaine","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common  Stock","published_at":"2025-01-06T21:20:53.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":22000,"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 as to 25% on January 2, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2029."},{"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":102800,"source":{"system":"sec-edgar","filing":"0001453687-25-000025","document":"wk-form4_1736198446.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000025/wk-form4_1736198446.xml","form_type":"4"}},{"id":1310434,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69763,"kind":"person","name":"Miljkovic Milos","position":1,"cik":"0002000282","reported_name":"Miljkovic Milos","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Employee Stock Option (right to buy)","published_at":"2025-01-06T21:20:30.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":56000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option vests as to 25% on January 2, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2029."}],"balance_after":56000,"derivative":{"exercise_price":16.93,"expiration_date":"2035-01-01","underlying":"Common  Stock","underlying_shares":56000},"source":{"system":"sec-edgar","filing":"0001453687-25-000023","document":"wk-form4_1736198423.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000023/wk-form4_1736198423.xml","form_type":"4"}},{"id":1310433,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69763,"kind":"person","name":"Miljkovic Milos","position":1,"cik":"0002000282","reported_name":"Miljkovic Milos","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common  Stock","published_at":"2025-01-06T21:20:30.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":19000,"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 as to 25% on January 2, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2029."}],"balance_after":37273,"source":{"system":"sec-edgar","filing":"0001453687-25-000023","document":"wk-form4_1736198423.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000023/wk-form4_1736198423.xml","form_type":"4"}},{"id":1310432,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":53583,"kind":"person","name":"Kalayoglu Murat","position":1,"cik":"0002000002","reported_name":"Kalayoglu Murat","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2025-01-06T21:20:20.000Z","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":"0001453687-25-000022","document":"wk-form4_1736198413.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000022/wk-form4_1736198413.xml","form_type":"4"}},{"id":1310431,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":53583,"kind":"person","name":"Kalayoglu Murat","position":1,"cik":"0002000002","reported_name":"Kalayoglu Murat","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common  Stock","published_at":"2025-01-06T21:20:20.000Z","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."}],"balance_after":508977,"source":{"system":"sec-edgar","filing":"0001453687-25-000022","document":"wk-form4_1736198413.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000022/wk-form4_1736198413.xml","form_type":"4"}},{"id":1310430,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":28773,"kind":"person","name":"BARABE TIMOTHY C","position":1,"cik":"0001237409","reported_name":"BARABE TIMOTHY C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2025-01-06T21:20:10.000Z","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":"0001453687-25-000021","document":"wk-form4_1736198402.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000021/wk-form4_1736198402.xml","form_type":"4"}},{"id":1310429,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":28773,"kind":"person","name":"BARABE TIMOTHY C","position":1,"cik":"0001237409","reported_name":"BARABE TIMOTHY C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-01-06T21:20:10.000Z","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."}],"balance_after":24366,"source":{"system":"sec-edgar","filing":"0001453687-25-000021","document":"wk-form4_1736198402.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000021/wk-form4_1736198402.xml","form_type":"4"}},{"id":1311552,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2025-01-06T21:19:59.000Z","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":"0001453687-25-000020","document":"wk-form4_1736198391.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000020/wk-form4_1736198391.xml","form_type":"4"}},{"id":1311551,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":39790,"kind":"person","name":"SPRINGER TIMOTHY A","position":1,"cik":"0001055624","reported_name":"SPRINGER TIMOTHY A","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-01-06T21:19:59.000Z","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."}],"balance_after":8510495,"source":{"system":"sec-edgar","filing":"0001453687-25-000020","document":"wk-form4_1736198391.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1055624/000145368725000020/wk-form4_1736198391.xml","form_type":"4"}},{"id":1310428,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69990,"kind":"person","name":"Malik Kemal","position":1,"cik":"0001797921","reported_name":"Malik Kemal","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2025-01-06T21:19:48.000Z","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":"0001453687-25-000019","document":"wk-form4_1736198381.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000019/wk-form4_1736198381.xml","form_type":"4"}},{"id":1310427,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69990,"kind":"person","name":"Malik Kemal","position":1,"cik":"0001797921","reported_name":"Malik Kemal","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common  Stock","published_at":"2025-01-06T21:19:48.000Z","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."}],"balance_after":8533,"source":{"system":"sec-edgar","filing":"0001453687-25-000019","document":"wk-form4_1736198381.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000019/wk-form4_1736198381.xml","form_type":"4"}},{"id":1310426,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":84326,"kind":"person","name":"Kurtoglu Metin","position":1,"cik":"0002000284","reported_name":"Kurtoglu Metin","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Employee Stock Option (right to buy)","published_at":"2025-01-06T21:19:37.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":47400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option vests as to 25% on January 2, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2029."}],"balance_after":47400,"derivative":{"exercise_price":16.93,"expiration_date":"2035-01-01","underlying":"Common  Stock","underlying_shares":47400},"source":{"system":"sec-edgar","filing":"0001453687-25-000018","document":"wk-form4_1736198370.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000018/wk-form4_1736198370.xml","form_type":"4"}},{"id":1310425,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":84326,"kind":"person","name":"Kurtoglu Metin","position":1,"cik":"0002000284","reported_name":"Kurtoglu Metin","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Common  Stock","published_at":"2025-01-06T21:19:37.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":16100,"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 as to 25% on January 2, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2029."}],"balance_after":67133,"source":{"system":"sec-edgar","filing":"0001453687-25-000018","document":"wk-form4_1736198370.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000018/wk-form4_1736198370.xml","form_type":"4"}},{"id":1310424,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":60971,"kind":"person","name":"Singer Michael","position":1,"cik":"0002000122","reported_name":"Singer Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2025-01-06T21:19:26.000Z","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":"0001453687-25-000017","document":"wk-form4_1736198360.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000017/wk-form4_1736198360.xml","form_type":"4"}},{"id":1310423,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":60971,"kind":"person","name":"Singer Michael","position":1,"cik":"0002000122","reported_name":"Singer Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common  Stock","published_at":"2025-01-06T21:19:26.000Z","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."}],"balance_after":73533,"source":{"system":"sec-edgar","filing":"0001453687-25-000017","document":"wk-form4_1736198360.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368725000017/wk-form4_1736198360.xml","form_type":"4"}},{"id":1311477,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":10815,"kind":"person","name":"COX CARRIE SMITH","position":1,"cik":"0001110753","reported_name":"COX CARRIE SMITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2025-01-06T21:19:16.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":8000,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":8000,"derivative":{"exercise_price":16.93,"exercise_date":"2026-01-02","expiration_date":"2035-01-01","underlying":"Common  Stock","underlying_shares":8000},"source":{"system":"sec-edgar","filing":"0001453687-25-000016","document":"wk-form4_1736198350.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1110753/000145368725000016/wk-form4_1736198350.xml","form_type":"4"}},{"id":1311476,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":10815,"kind":"person","name":"COX CARRIE SMITH","position":1,"cik":"0001110753","reported_name":"COX CARRIE SMITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common  Stock","published_at":"2025-01-06T21:19:16.000Z","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":15629,"source":{"system":"sec-edgar","filing":"0001453687-25-000016","document":"wk-form4_1736198350.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1110753/000145368725000016/wk-form4_1736198350.xml","form_type":"4"}},{"id":1310830,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69769,"kind":"person","name":"Brunn Carsten","position":1,"cik":"0001760229","reported_name":"Brunn Carsten","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (right to buy)","published_at":"2025-01-06T16:21:27.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":169100,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This option vests as to 25% on January 2, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2029."}],"balance_after":169100,"derivative":{"exercise_price":16.93,"expiration_date":"2035-01-01","underlying":"Common  Stock","underlying_shares":169100},"source":{"system":"sec-edgar","filing":"0001453687-25-000028","document":"wk-form4_1736198480.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1760229/000145368725000028/wk-form4_1736198480.xml","form_type":"4"}},{"id":1310829,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":69769,"kind":"person","name":"Brunn Carsten","position":1,"cik":"0001760229","reported_name":"Brunn Carsten","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2025-01-06T16:21:27.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":57500,"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 as to 25% on January 2, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2029."},{"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":221367,"source":{"system":"sec-edgar","filing":"0001453687-25-000028","document":"wk-form4_1736198480.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1760229/000145368725000028/wk-form4_1736198480.xml","form_type":"4"}},{"id":1311250,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Employee Stock Option (right to buy)","published_at":"2025-01-06T16:21:04.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":47400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option vests as to 25% on January 2, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2029."}],"balance_after":47400,"derivative":{"exercise_price":16.93,"expiration_date":"2035-01-01","underlying":"Common  Stock","underlying_shares":47400},"source":{"system":"sec-edgar","filing":"0001453687-25-000026","document":"wk-form4_1736198457.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368725000026/wk-form4_1736198457.xml","form_type":"4"}},{"id":1311249,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70053,"kind":"person","name":"English Emily","position":1,"cik":"0002019791","reported_name":"English Emily","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operations Officer"}}],"security":"Common  Stock","published_at":"2025-01-06T16:21:04.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":16100,"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 as to 25% on January 2, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on January 2, 2029."}],"balance_after":42023,"source":{"system":"sec-edgar","filing":"0001453687-25-000026","document":"wk-form4_1736198457.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2019791/000145368725000026/wk-form4_1736198457.xml","form_type":"4"}},{"id":1311412,"issuer":{"id":6015,"kind":"organization","name":"Cartesian Therapeutics, Inc."},"owners":[{"id":70084,"kind":"person","name":"ZENNER PATRICK J","position":1,"cik":"0001139036","reported_name":"ZENNER PATRICK J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2025-01-06T16:20:42.000Z","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":"0001453687-25-000024","document":"wk-form4_1736198433.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1139036/000145368725000024/wk-form4_1736198433.xml","form_type":"4"}}],"next_cursor":"2025-01-06T16:20:42.000000Z,1311412"}