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Options to purchase Old Cartesian common stock held by the reporting person were converted into options to purchase shares of Series A Preferred Stock in connection with the acquisition."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Prior to the Automatic Conversion, the option was exercisable for 213.823 shares of Series A Preferred Stock and would have become exercisable for the remaining 213.823 shares of Series A Preferred Stock in two equal tranches on March 1, 2025 and 2026."}],"balance_after":0,"derivative":{"exercise_price":107.59,"expiration_date":"2033-01-15","underlying":"Series A Non-Voting Convertible Preferred Stock","underlying_shares":427.646},"source":{"system":"sec-edgar","filing":"0001453687-24-000057","document":"wk-form4_1712799040.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368724000057/wk-form4_1712799040.xml","form_type":"4"}},{"id":1543701,"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":"Stock Option (Right to Buy)","published_at":"2024-04-11T01:30:50.000Z","date":"2024-04-08","kind":"exercise","planned":false,"acquired":true,"shares":14254,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"Following the Automatic Conversion, options previously exercisable for shares of Series A Preferred Stock may be exercised solely for shares of Common Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Following the Automatic Conversion, the option is fully exercisable."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"On April 4, 2024, the issuer effected a 1-for-30 reverse stock split (the \"Reverse Stock Split\") of its common stock (\"Common Stock\"). The amount of securities reported on this Form 4 has been adjusted to reflect the Reverse Stock Split."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On April 4, 2024, the issuer effected a 1-for-30 reverse stock split (the \"Reverse Stock Split\") of its common stock (\"Common Stock\"). The amount of securities reported on this Form 4 has been adjusted to reflect the Reverse Stock Split."}],"balance_after":14254,"derivative":{"exercise_price":3.23,"expiration_date":"2031-04-25","underlying":"Common Stock","underlying_shares":14254},"source":{"system":"sec-edgar","filing":"0001453687-24-000057","document":"wk-form4_1712799040.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368724000057/wk-form4_1712799040.xml","form_type":"4"}},{"id":1543700,"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":"Stock Option (Right to Buy)","published_at":"2024-04-11T01:30:50.000Z","date":"2024-04-08","kind":"exercise","planned":false,"acquired":false,"shares":427.645,"ownership":{"direct":true},"footnotes":[{"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. (\"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 Series A Preferred Stock in connection with the acquisition."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On March 27, 2024, the issuer held a special meeting of stockholders (the \"Special Meeting\"). At the Special Meeting, the stockholders of the issuer approved the Reverse Stock Split and the conversion of the issuer's Series A Non-Voting Convertible Preferred Stock (\"Series A Preferred Stock\") into shares of Common Stock. On April 8, 2024, the conversion of the majority of the shares of Series A Preferred Stock occurred automatically (the \"Automatic Conversion\"). The remaining shares of Series A Preferred Stock remain subject to certain beneficial ownership limitations described in the issuer's filings with the Securities and Exchange Commission. Prior to the Automatic Conversion, the option was fully exercisable."}],"balance_after":0,"derivative":{"exercise_price":107.59,"expiration_date":"2031-04-25","underlying":"Series A Non-Voting Convertible Preferred Stock","underlying_shares":427.645},"source":{"system":"sec-edgar","filing":"0001453687-24-000057","document":"wk-form4_1712799040.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368724000057/wk-form4_1712799040.xml","form_type":"4"}},{"id":1543699,"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":"Stock Option (Right to Buy)","published_at":"2024-04-11T01:30:50.000Z","date":"2024-04-08","kind":"exercise","planned":false,"acquired":true,"shares":213820,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"Following the Automatic Conversion, options previously exercisable for shares of Series A Preferred Stock may be exercised solely for shares of Common Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Following the Automatic Conversion, the option is fully exercisable."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"On April 4, 2024, the issuer effected a 1-for-30 reverse stock split (the \"Reverse Stock Split\") of its common stock (\"Common Stock\"). The amount of securities reported on this Form 4 has been adjusted to reflect the Reverse Stock Split."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On April 4, 2024, the issuer effected a 1-for-30 reverse stock split (the \"Reverse Stock Split\") of its common stock (\"Common Stock\"). The amount of securities reported on this Form 4 has been adjusted to reflect the Reverse Stock Split."}],"balance_after":213820,"derivative":{"exercise_price":1.41,"expiration_date":"2026-11-06","underlying":"Common Stock","underlying_shares":213820},"source":{"system":"sec-edgar","filing":"0001453687-24-000057","document":"wk-form4_1712799040.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368724000057/wk-form4_1712799040.xml","form_type":"4"}},{"id":1543698,"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":"Stock Option (Right to Buy)","published_at":"2024-04-11T01:30:50.000Z","date":"2024-04-08","kind":"exercise","planned":false,"acquired":false,"shares":6414.682,"ownership":{"direct":true},"footnotes":[{"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. (\"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 Series A Preferred Stock in connection with the acquisition."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On March 27, 2024, the issuer held a special meeting of stockholders (the \"Special Meeting\"). At the Special Meeting, the stockholders of the issuer approved the Reverse Stock Split and the conversion of the issuer's Series A Non-Voting Convertible Preferred Stock (\"Series A Preferred Stock\") into shares of Common Stock. On April 8, 2024, the conversion of the majority of the shares of Series A Preferred Stock occurred automatically (the \"Automatic Conversion\"). The remaining shares of Series A Preferred Stock remain subject to certain beneficial ownership limitations described in the issuer's filings with the Securities and Exchange Commission. Prior to the Automatic Conversion, the option was fully exercisable."}],"balance_after":0,"derivative":{"exercise_price":46.77,"expiration_date":"2026-11-06","underlying":"Series A Non-Voting Convertible Preferred Stock","underlying_shares":6414.682},"source":{"system":"sec-edgar","filing":"0001453687-24-000057","document":"wk-form4_1712799040.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368724000057/wk-form4_1712799040.xml","form_type":"4"}},{"id":1687665,"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 Operating Officer"}}],"security":"Employee Stock Option (right to buy)","published_at":"2024-01-04T22:03:44.000Z","date":"2024-01-02","kind":"grant","planned":false,"acquired":true,"shares":1965000,"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, 2025. 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, 2028."}],"balance_after":1965000,"derivative":{"exercise_price":0.6552,"expiration_date":"2034-01-01","underlying":"Common  Stock","underlying_shares":1965000},"source":{"system":"sec-edgar","filing":"0001453687-24-000016","document":"wk-form4_1704405809.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368724000016/wk-form4_1704405809.xml","form_type":"4"}},{"id":1687664,"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 Operating Officer"}}],"security":"Common  Stock","published_at":"2024-01-04T22:03:44.000Z","date":"2024-01-02","kind":"grant","planned":false,"acquired":true,"shares":1531000,"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 as to 25% on January 2, 2025. 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, 2028."}],"balance_after":1531000,"source":{"system":"sec-edgar","filing":"0001453687-24-000016","document":"wk-form4_1704405809.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000145368724000016/wk-form4_1704405809.xml","form_type":"4"}},{"id":1740590,"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 Operations Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2023-11-15T21:42:25.000Z","date":"2023-11-13","kind":"grant","planned":false,"acquired":true,"shares":427.645,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On November 13, 2023, the issuer acquired Cartesian Therapeutics, Inc. (\"Cartesian\") in accordance with the terms of an Agreement and Plan of Merger, dated November 13, 2023. Options to purchase Cartesian common stock held by the reporting person were converted into options to purchase shares of Series A Preferred Stock in connection with the acquisition."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Option is currently exercisable for 106.911 shares of Series A Non-Voting Convertible Preferred Stock of the issuer (\"Series A Preferred Stock\") and becomes exercisable for the remaining shares in three equal tranches on March 1, 2024, 2025 and 2026."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F2","text":"Following the approval by the stockholders of the issuer of the conversion of the Series A Preferred Stock into shares of common stock of the issuer (\"Common Stock\"), each share of Series A Preferred Stock will be convertible into 1,000 shares of Common Stock, subject to certain limitations, including that a holder of Series A Preferred Stock is prohibited from converting shares of Series Preferred Stock into shares of Common Stock if, as a result of such conversion, such holder, together with its affiliates, would beneficially own more than 19.9% of the total number of shares of Common Stock issued and outstanding immediately after giving effect to such conversion."}],"balance_after":427.645,"derivative":{"exercise_price":107.59,"expiration_date":"2032-02-29","underlying":"Series A Non-Voting Convertible Preferred Stock","underlying_shares":427.645},"source":{"system":"sec-edgar","filing":"0001062993-23-020924","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000106299323020924/form4.xml","form_type":"4"}},{"id":1740589,"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 Operations Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2023-11-15T21:42:25.000Z","date":"2023-11-13","kind":"grant","planned":false,"acquired":true,"shares":427.645,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On November 13, 2023, the issuer acquired Cartesian Therapeutics, Inc. (\"Cartesian\") in accordance with the terms of an Agreement and Plan of Merger, dated November 13, 2023. Options to purchase Cartesian common stock held by the reporting person were converted into options to purchase shares of Series A Preferred Stock in connection with the acquisition."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Option is fully exercisable."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F2","text":"Following the approval by the stockholders of the issuer of the conversion of the Series A Preferred Stock into shares of common stock of the issuer (\"Common Stock\"), each share of Series A Preferred Stock will be convertible into 1,000 shares of Common Stock, subject to certain limitations, including that a holder of Series A Preferred Stock is prohibited from converting shares of Series Preferred Stock into shares of Common Stock if, as a result of such conversion, such holder, together with its affiliates, would beneficially own more than 19.9% of the total number of shares of Common Stock issued and outstanding immediately after giving effect to such conversion."}],"balance_after":427.645,"derivative":{"exercise_price":107.59,"expiration_date":"2031-04-25","underlying":"Series A Non-Voting Convertible Preferred Stock","underlying_shares":427.645},"source":{"system":"sec-edgar","filing":"0001062993-23-020924","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000106299323020924/form4.xml","form_type":"4"}},{"id":1740588,"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 Operations Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2023-11-15T21:42:25.000Z","date":"2023-11-13","kind":"grant","planned":false,"acquired":true,"shares":6414.682,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On November 13, 2023, the issuer acquired Cartesian Therapeutics, Inc. (\"Cartesian\") in accordance with the terms of an Agreement and Plan of Merger, dated November 13, 2023. Options to purchase Cartesian common stock held by the reporting person were converted into options to purchase shares of Series A Preferred Stock in connection with the acquisition."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Option is fully exercisable."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F2","text":"Following the approval by the stockholders of the issuer of the conversion of the Series A Preferred Stock into shares of common stock of the issuer (\"Common Stock\"), each share of Series A Preferred Stock will be convertible into 1,000 shares of Common Stock, subject to certain limitations, including that a holder of Series A Preferred Stock is prohibited from converting shares of Series Preferred Stock into shares of Common Stock if, as a result of such conversion, such holder, together with its affiliates, would beneficially own more than 19.9% of the total number of shares of Common Stock issued and outstanding immediately after giving effect to such conversion."}],"balance_after":6414.682,"derivative":{"exercise_price":46.77,"expiration_date":"2026-11-06","underlying":"Series A Non-Voting Convertible Preferred Stock","underlying_shares":6414.682},"source":{"system":"sec-edgar","filing":"0001062993-23-020924","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1453687/000106299323020924/form4.xml","form_type":"4"}}]}