Last 12 months
Inside the activity.
1 purchase rows · 3 sale rows
Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.Monthly counts
| Month | Purchases | Sales |
|---|---|---|
| Nov 2025 | 0 | 0 |
| Dec 2025 | 1 | 0 |
| Jan 2026 | 0 | 3 |
| Feb 2026 | 0 | 0 |
| Mar 2026 | 0 | 0 |
| Apr 2026 | 0 | 0 |
| May 2026 | 0 | 0 |
| Jun 2026 | 0 | 0 |
| Jul 2026 | 0 | 0 |
| Aug 2026 | 0 | 0 |
| Sep 2026 | 0 | 0 |
| Oct 2026 | 0 | 0 |
Latest available
Insider transactions
Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Owner / reported role | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| April 02, 2026 Filed Apr 6, 2026 20:28 UTC |
Hoge Elizabeth10% owner
|
Exercise / conversionSeries A Non-Voting Convertible Preferred Stock · Derivative | 22,740.03 | Not disclosed | Not disclosed |
DisclosureSEC source: 0002064832-26-000149 · form4.xml · derivative · entry 3 Hoge Elizabeth · CIK 0002000987 · 10% owner Seven One Eight Three Four Irrevocable Trust · CIK 0002000959 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: No plan indicated Ownership: Indirect · as trustee Disclosed balance after: 33,662.224 Underlying: Common Stock · 758,001 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: 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. F3 · price: 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. F1 · derivative.exercise_date: 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. F1 · derivative.expiration_date: 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. F2 · ownership.nature: Shares are held by the Trust. The reporting person is a trustee of the Trust. Read SEC document |
| April 02, 2026 Filed Apr 6, 2026 20:28 UTC |
Hoge Elizabeth10% owner
|
Exercise / conversionCommon Stock | 758,001 | Not disclosed | Not disclosed |
DisclosureSEC source: 0002064832-26-000149 · form4.xml · nonDerivative · entry 1 Hoge Elizabeth · CIK 0002000987 · 10% owner Seven One Eight Three Four Irrevocable Trust · CIK 0002000959 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: No plan indicated Ownership: Indirect · as trustee Disclosed balance after: 5,313,261 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · price: 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. F2 · ownership.nature: Shares are held by the Trust. The reporting person is a trustee of the Trust. Read SEC document |
| April 02, 2026 Filed Apr 6, 2026 20:28 UTC |
Kalayoglu Murat10% owner
|
Exercise / conversionSeries A Non-Voting Convertible Preferred Stock · Derivative | 22,740.03 | Not disclosed | Not disclosed |
DisclosureSEC source: 0002064832-26-000148 · form4.xml · derivative · entry 3 Kalayoglu Murat · CIK 0002000002 · 10% owner 10b5-1 filing: No plan indicated Ownership: Indirect · by trust Disclosed balance after: 33,662.224 Underlying: Common Stock · 758,001 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: 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. F3 · price: 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. F1 · derivative.exercise_date: 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. F1 · derivative.expiration_date: 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. F2 · ownership.nature: 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. Read SEC document |
| April 02, 2026 Filed Apr 6, 2026 20:28 UTC |
Kalayoglu Murat10% owner
|
Exercise / conversionCommon Stock | 758,001 | Not disclosed | Not disclosed |
DisclosureSEC source: 0002064832-26-000148 · form4.xml · nonDerivative · entry 1 Kalayoglu Murat · CIK 0002000002 · 10% owner 10b5-1 filing: No plan indicated Ownership: Indirect · by trust Disclosed balance after: 5,313,261 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · price: 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. F2 · ownership.nature: 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. Read SEC document |
| March 13, 2026 Filed Mar 13, 2026 20:14 UTC |
Singer MichaelDirector
|
GiftCommon Stock | 6,555 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-26-000066 · wk-form4_1773432889.xml · nonDerivative · entry 1 Singer Michael · CIK 0002000122 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 49,578 Read SEC document |
| January 06, 2026 Filed Jan 8, 2026 16:20 UTC |
Brunn CarstenDirector · President and CEO
|
SaleCommon Stock | 23,766 | $6.82 | $162,076.99 |
DisclosureSEC source: 0001453687-26-000047 · wk-form4_1767907199.xml · nonDerivative · entry 1 Brunn Carsten · CIK 0001760229 · Director · President and CEO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 323,530 F1 · price: Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees. Read SEC document |
| January 06, 2026 Filed Jan 8, 2026 21:19 UTC |
Miljkovic MilosChief Medical Officer
|
SaleCommon Stock | 3,573 | $6.82 | $24,366.79 |
DisclosureSEC source: 0001453687-26-000046 · wk-form4_1767907193.xml · nonDerivative · entry 1 Miljkovic Milos · CIK 0002000282 · Chief Medical Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 58,820 F1 · price: Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees. Read SEC document |
| January 06, 2026 Filed Jan 8, 2026 21:19 UTC |
Davis BlaineChief Financial Officer
|
SaleCommon Stock | 10,591 | $6.82 | $72,227.44 |
DisclosureSEC source: 0001453687-26-000045 · wk-form4_1767907186.xml · nonDerivative · entry 1 Davis Blaine · CIK 0001802188 · Chief Financial Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 121,220 F1 · price: Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:18 UTC |
SPRINGER TIMOTHY ADirector · 10% owner
|
GrantStock Option (Right to Buy) · Derivative | 7,800 | $0.00 Strike: $6.76 | $0.00 |
DisclosureSEC source: 0001453687-26-000029 · wk-form4_1767734290.xml · derivative · entry 4 SPRINGER TIMOTHY A · CIK 0001055624 · Director · 10% owner 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,800 Underlying: Common Stock · 7,800 shares Expires 2036-01-01 Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:18 UTC |
SPRINGER TIMOTHY ADirector · 10% owner
|
GrantCommon Stock | 2,600 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-26-000029 · wk-form4_1767734290.xml · nonDerivative · entry 1 SPRINGER TIMOTHY A · CIK 0001055624 · Director · 10% owner 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 8,646,285 F1 · acquired: Each Restricted Stock Unit represents a contingent right to receive one share of common stock, which will vest in full on January 2, 2027. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 16:18 UTC |
ZENNER PATRICK JDirector
|
GrantStock Option (Right to Buy) · Derivative | 7,800 | $0.00 Strike: $6.76 | $0.00 |
DisclosureSEC source: 0001453687-26-000035 · wk-form4_1767734336.xml · derivative · entry 2 ZENNER PATRICK J · CIK 0001139036 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,800 Underlying: Common Stock · 7,800 shares Expires 2036-01-01 Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 16:18 UTC |
ZENNER PATRICK JDirector
|
GrantCommon Stock | 2,600 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-26-000035 · wk-form4_1767734336.xml · nonDerivative · entry 1 ZENNER PATRICK J · CIK 0001139036 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 12,974 F1 · acquired: Each Restricted Stock Unit represents a contingent right to receive one share of common stock, which will vest in full on January 2, 2027. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 16:18 UTC |
Seymour June AnnChief Accounting Officer
|
GrantEmployee Stock Option (right to buy) · Derivative | 19,000 | $0.00 Strike: $6.76 | $0.00 |
DisclosureSEC source: 0001453687-26-000034 · wk-form4_1767734330.xml · derivative · entry 2 Seymour June Ann · CIK 0002093716 · Chief Accounting Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 19,000 Underlying: Common Stock · 19,000 shares Expires 2036-01-01 F2 · derivative.exercise_date: This option vests as to 25% on January 2, 2027. The remainder of the underlying shares will vest in 36 equal monthly installments thereafter. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 16:18 UTC |
Seymour June AnnChief Accounting Officer
|
GrantCommon Stock | 6,500 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-26-000034 · wk-form4_1767734330.xml · nonDerivative · entry 1 Seymour June Ann · CIK 0002093716 · Chief Accounting Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 6,500 F1 · acquired: 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. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 16:18 UTC |
English EmilyChief Operations Officer
|
GrantEmployee Stock Option (right to buy) · Derivative | 71,000 | $0.00 Strike: $6.76 | $0.00 |
DisclosureSEC source: 0001453687-26-000031 · wk-form4_1767734302.xml · derivative · entry 2 English Emily · CIK 0002019791 · Chief Operations Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 71,000 Underlying: Common Stock · 71,000 shares Expires 2036-01-01 F2 · derivative.exercise_date: This option vests as to 25% on January 2, 2027. The remainder of the underlying shares will vest in 36 equal monthly installments thereafter. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 16:18 UTC |
English EmilyChief Operations Officer
|
GrantCommon Stock | 24,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-26-000031 · wk-form4_1767734302.xml · nonDerivative · entry 1 English Emily · CIK 0002019791 · Chief Operations Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 94,226 F1 · acquired: 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. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 16:19 UTC |
Brunn CarstenDirector · President and CEO
|
GrantEmployee Stock Option (right to buy) · Derivative | 415,700 | $0.00 Strike: $6.76 | $0.00 |
DisclosureSEC source: 0001453687-26-000038 · wk-form4_1767734357.xml · derivative · entry 2 Brunn Carsten · CIK 0001760229 · Director · President and CEO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 415,700 Underlying: Common Stock · 415,700 shares Expires 2036-01-01 F2 · derivative.exercise_date: This option vests as to 25% on January 2, 2027. The remainder of the underlying shares will vest in 36 equal monthly installments thereafter. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 16:19 UTC |
Brunn CarstenDirector · President and CEO
|
GrantCommon Stock | 143,200 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-26-000038 · wk-form4_1767734357.xml · nonDerivative · entry 1 Brunn Carsten · CIK 0001760229 · Director · President and CEO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 347,296 F1 · acquired: 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. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 16:19 UTC |
DeSilva Nishan MDirector
|
GrantStock Option (Right to Buy) · Derivative | 7,800 | $0.00 Strike: $6.76 | $0.00 |
DisclosureSEC source: 0001453687-26-000039 · wk-form4_1767734365.xml · derivative · entry 2 DeSilva Nishan M · CIK 0001492386 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,800 Underlying: Common Stock · 7,800 shares Expires 2036-01-01 Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 16:19 UTC |
DeSilva Nishan MDirector
|
GrantCommon Stock | 2,600 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-26-000039 · wk-form4_1767734365.xml · nonDerivative · entry 1 DeSilva Nishan M · CIK 0001492386 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 11,366 F1 · acquired: Each Restricted Stock Unit represents a contingent right to receive one share of common stock, which will vest in full on January 2, 2027. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:18 UTC |
Davis BlaineChief Financial Officer
|
GrantEmployee Stock Option (right to buy) · Derivative | 109,000 | $0.00 Strike: $6.76 | $0.00 |
DisclosureSEC source: 0001453687-26-000033 · wk-form4_1767734322.xml · derivative · entry 2 Davis Blaine · CIK 0001802188 · Chief Financial Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 109,000 Underlying: Common Stock · 109,000 shares Expires 2036-01-01 F2 · derivative.exercise_date: This option vests as to 25% on January 2, 2027. The remainder of the underlying shares will vest in 36 equal monthly installments thereafter. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:18 UTC |
Davis BlaineChief Financial Officer
|
GrantCommon Stock | 37,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-26-000033 · wk-form4_1767734322.xml · nonDerivative · entry 1 Davis Blaine · CIK 0001802188 · Chief Financial Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 131,811 F1 · acquired: 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. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:19 UTC |
Malik KemalDirector
|
GrantStock Option (Right to Buy) · Derivative | 7,800 | $0.00 Strike: $6.76 | $0.00 |
DisclosureSEC source: 0001453687-26-000037 · wk-form4_1767734348.xml · derivative · entry 2 Malik Kemal · CIK 0001797921 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,800 Underlying: Common Stock · 7,800 shares Expires 2036-01-01 Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:19 UTC |
Malik KemalDirector
|
GrantCommon Stock | 2,600 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-26-000037 · wk-form4_1767734348.xml · nonDerivative · entry 1 Malik Kemal · CIK 0001797921 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 11,133 F1 · acquired: Each Restricted Stock Unit represents a contingent right to receive one share of common stock, which will vest in full on January 2, 2027. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:19 UTC |
Miljkovic MilosChief Medical Officer
|
GrantEmployee Stock Option (right to buy) · Derivative | 77,000 | $0.00 Strike: $6.76 | $0.00 |
DisclosureSEC source: 0001453687-26-000036 · wk-form4_1767734342.xml · derivative · entry 2 Miljkovic Milos · CIK 0002000282 · Chief Medical Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 77,000 Underlying: Common Stock · 77,000 shares Expires 2036-01-01 F2 · derivative.exercise_date: This option vests as to 25% on January 2, 2027. The remainder of the underlying shares will vest in 36 equal monthly installments thereafter. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:19 UTC |
Miljkovic MilosChief Medical Officer
|
GrantCommon Stock | 27,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-26-000036 · wk-form4_1767734342.xml · nonDerivative · entry 1 Miljkovic Milos · CIK 0002000282 · Chief Medical Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 62,393 F1 · acquired: 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. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:18 UTC |
BARABE TIMOTHY CDirector
|
GrantStock Option (Right to Buy) · Derivative | 7,800 | $0.00 Strike: $6.76 | $0.00 |
DisclosureSEC source: 0001453687-26-000032 · wk-form4_1767734312.xml · derivative · entry 2 BARABE TIMOTHY C · CIK 0001237409 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,800 Underlying: Common Stock · 7,800 shares Expires 2036-01-01 Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:18 UTC |
BARABE TIMOTHY CDirector
|
GrantCommon Stock | 2,600 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-26-000032 · wk-form4_1767734312.xml · nonDerivative · entry 1 BARABE TIMOTHY C · CIK 0001237409 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 56,966 F1 · acquired: Each Restricted Stock Unit represents a contingent right to receive one share of common stock, which will vest in full on January 2, 2027. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:18 UTC |
Singer MichaelDirector
|
GrantStock Option (Right to Buy) · Derivative | 7,800 | $0.00 Strike: $6.76 | $0.00 |
DisclosureSEC source: 0001453687-26-000030 · wk-form4_1767734296.xml · derivative · entry 8 Singer Michael · CIK 0002000122 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,800 Underlying: Common Stock · 7,800 shares Expires 2036-01-01 Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:18 UTC |
Singer MichaelDirector
|
GrantCommon Stock | 2,600 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-26-000030 · wk-form4_1767734296.xml · nonDerivative · entry 1 Singer Michael · CIK 0002000122 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 56,133 F1 · acquired: Each Restricted Stock Unit represents a contingent right to receive one share of common stock, which will vest in full on January 2, 2027. Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:18 UTC |
Kalayoglu MuratDirector · 10% owner
|
GrantStock Option (Right to Buy) · Derivative | 7,800 | $0.00 Strike: $6.76 | $0.00 |
DisclosureSEC source: 0001453687-26-000028 · wk-form4_1767734285.xml · derivative · entry 3 Kalayoglu Murat · CIK 0002000002 · Director · 10% owner 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,800 Underlying: Common Stock · 7,800 shares Expires 2036-01-01 Read SEC document |
| January 02, 2026 Filed Jan 6, 2026 21:18 UTC |
Kalayoglu MuratDirector · 10% owner
|
GrantCommon Stock | 2,600 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-26-000028 · wk-form4_1767734285.xml · nonDerivative · entry 1 Kalayoglu Murat · CIK 0002000002 · Director · 10% owner 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 511,577 F1 · acquired: Each Restricted Stock Unit represents a contingent right to receive one share of common stock, which will vest in full on January 2, 2027. Read SEC document |
| December 30, 2025 Filed Jan 2, 2026 16:03 UTC |
English EmilyChief Operations Officer
|
Exercise / conversionStock Option (Right to Buy) · Derivative | 7,500 | Not disclosed Strike: $3.30 | Not disclosed |
DisclosureSEC source: 0001453687-26-000002 · wk-form4_1767387807.xml · derivative · entry 2 English Emily · CIK 0002019791 · Chief Operations Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 19,369 Underlying: Common Stock · 7,500 shares Expires 2031-04-25 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · price: 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. F1 · derivative.exercise_date: These options are currently fully vested and exercisable. Read SEC document |
| December 30, 2025 Filed Jan 2, 2026 16:03 UTC |
English EmilyChief Operations Officer
|
Exercise / conversionCommon Stock | 7,500 | $3.30 | $24,750.00 |
DisclosureSEC source: 0001453687-26-000002 · wk-form4_1767387807.xml · nonDerivative · entry 1 English Emily · CIK 0002019791 · Chief Operations Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 70,226 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| December 16, 2025 Filed Dec 18, 2025 22:05 UTC |
Bot Adrian IonDirector
|
GrantStock Option (Right to Buy) · Derivative | 17,200 | $0.00 Strike: $8.29 | $0.00 |
DisclosureSEC source: 0001453687-25-000144 · wk-form4_1766095515.xml · derivative · entry 2 Bot Adrian Ion · CIK 0002101801 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 17,200 Underlying: Common Stock · 17,200 shares Expires 2035-12-15 F2 · derivative.exercise_date: This award will vest in 36 equal monthly installments, so that it shall be fully vested on December 16, 2028. Read SEC document |
| December 16, 2025 Filed Dec 18, 2025 22:05 UTC |
Bot Adrian IonDirector
|
GrantCommon Stock | 5,800 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-25-000144 · wk-form4_1766095515.xml · nonDerivative · entry 1 Bot Adrian Ion · CIK 0002101801 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 5,800 F1 · kind: 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. Read SEC document |
| December 04, 2025 Filed Dec 8, 2025 21:07 UTC |
BARABE TIMOTHY CDirector
|
PurchaseCommon Stock | 30,000 | $6.86 | $205,797.00 |
DisclosureSEC source: 0001453687-25-000132 · wk-form4_1765228029.xml · nonDerivative · entry 1 BARABE TIMOTHY C · CIK 0001237409 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 54,366 F1 · price: 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. Read SEC document |
| November 28, 2025 Filed Dec 2, 2025 16:02 UTC |
English EmilyChief Operations Officer
|
Exercise / conversionStock Option (Right to Buy) · Derivative | 7,500 | Not disclosed Strike: $3.30 | Not disclosed |
DisclosureSEC source: 0001453687-25-000130 · wk-form4_1764709364.xml · derivative · entry 2 English Emily · CIK 0002019791 · Chief Operations Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 26,869 Underlying: Common Stock · 7,500 shares Expires 2031-04-25 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · price: 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. F1 · derivative.exercise_date: These options are currently fully vested and exercisable. Read SEC document |
| November 28, 2025 Filed Dec 2, 2025 16:02 UTC |
English EmilyChief Operations Officer
|
Exercise / conversionCommon Stock | 7,500 | $3.30 | $24,750.00 |
DisclosureSEC source: 0001453687-25-000130 · wk-form4_1764709364.xml · nonDerivative · entry 1 English Emily · CIK 0002019791 · Chief Operations Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 62,726 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| November 18, 2025 Filed Nov 19, 2025 23:35 UTC |
Singer MichaelDirector
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GiftCommon Stock | 20,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001453687-25-000127 · wk-form4_1763595344.xml · nonDerivative · entry 1 Singer Michael · CIK 0002000122 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 53,533 Read SEC document |
| October 27, 2025 Filed Oct 28, 2025 16:05 UTC |
Seymour June AnnChief Accounting Officer
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GrantEmployee Stock Option (right to buy) · Derivative | 50,000 | $0.00 Strike: $8.85 | $0.00 |
DisclosureSEC source: 0001453687-25-000112 · wk-form4_1761681948.xml · derivative · entry 1 Seymour June Ann · CIK 0002093716 · Chief Accounting Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 50,000 Underlying: Common Stock · 50,000 shares Expires 2035-10-27 F1 · derivative.exercise_date: 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. Read SEC document |
| May 12, 2025 Filed May 14, 2025 16:15 UTC |
English EmilyChief Operations Officer
|
Exercise / conversionStock Option (Right to Buy) · Derivative | 7,500 | Not disclosed Strike: $3.30 | Not disclosed |
DisclosureSEC source: 0001453687-25-000089 · wk-form4_1747253745.xml · derivative · entry 2 English Emily · CIK 0002019791 · Chief Operations Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 34,369 Underlying: Common Stock · 7,500 shares Expires 2031-04-25 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · price: 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. F1 · derivative.exercise_date: These options are currently fully vested and exercisable. Read SEC document |
| May 12, 2025 Filed May 14, 2025 16:15 UTC |
English EmilyChief Operations Officer
|
Exercise / conversionCommon Stock | 7,500 | $3.30 | $24,750.00 |
DisclosureSEC source: 0001453687-25-000089 · wk-form4_1747253745.xml · nonDerivative · entry 1 English Emily · CIK 0002019791 · Chief Operations Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 55,226 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| April 15, 2025 Filed Apr 16, 2025 16:35 UTC |
English EmilyChief Operations Officer
|
Exercise / conversionStock Option (Right to Buy) · Derivative | 7,500 | Not disclosed Strike: $3.30 | Not disclosed |
DisclosureSEC source: 0001453687-25-000068 · wk-form4_1744835744.xml · derivative · entry 2 English Emily · CIK 0002019791 · Chief Operations Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 41,869 Underlying: Common Stock · 7,500 shares Expires 2031-04-25 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · price: 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. F1 · derivative.exercise_date: These options are currently fully vested and exercisable. Read SEC document |
| April 15, 2025 Filed Apr 16, 2025 16:35 UTC |
English EmilyChief Operations Officer
|
Exercise / conversionCommon Stock | 7,500 | $3.30 | $24,750.00 |
DisclosureSEC source: 0001453687-25-000068 · wk-form4_1744835744.xml · nonDerivative · entry 1 English Emily · CIK 0002019791 · Chief Operations Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 47,726 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| April 11, 2025 Filed Apr 11, 2025 21:29 UTC |
SPRINGER TIMOTHY ADirector · 10% owner
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PurchaseCommon Stock | 36,338 | $10.77 | $391,454.74 |
DisclosureSEC source: 0001453687-25-000066 · wk-form4_1744406973.xml · nonDerivative · entry 10 SPRINGER TIMOTHY A · CIK 0001055624 · Director · 10% owner 10b5-1 filing: No plan indicated Ownership: Indirect · See Footnote Disclosed balance after: 656,513 F5 · price: 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. F3 · ownership.nature: 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. Read SEC document |
| April 11, 2025 Filed Apr 11, 2025 21:29 UTC |
SPRINGER TIMOTHY ADirector · 10% owner
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PurchaseCommon Stock | 6,412 | $10.77 | $69,073.91 |
DisclosureSEC source: 0001453687-25-000066 · wk-form4_1744406973.xml · nonDerivative · entry 9 SPRINGER TIMOTHY A · CIK 0001055624 · Director · 10% owner 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 8,643,685 F5 · price: 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. Read SEC document |
| April 10, 2025 Filed Apr 11, 2025 21:29 UTC |
SPRINGER TIMOTHY ADirector · 10% owner
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PurchaseCommon Stock | 3,451 | $10.92 | $37,695.62 |
DisclosureSEC source: 0001453687-25-000066 · wk-form4_1744406973.xml · nonDerivative · entry 8 SPRINGER TIMOTHY A · CIK 0001055624 · Director · 10% owner 10b5-1 filing: No plan indicated Ownership: Indirect · See Footnote Disclosed balance after: 620,175 F3 · ownership.nature: 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. Read SEC document |
| April 10, 2025 Filed Apr 11, 2025 21:29 UTC |
SPRINGER TIMOTHY ADirector · 10% owner
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PurchaseCommon Stock | 45,144 | $10.43 | $471,055.07 |
DisclosureSEC source: 0001453687-25-000066 · wk-form4_1744406973.xml · nonDerivative · entry 7 SPRINGER TIMOTHY A · CIK 0001055624 · Director · 10% owner 10b5-1 filing: No plan indicated Ownership: Indirect · See Footnote Disclosed balance after: 616,724 F4 · price: 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. F3 · ownership.nature: 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. Read SEC document |
| April 10, 2025 Filed Apr 11, 2025 21:29 UTC |
SPRINGER TIMOTHY ADirector · 10% owner
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PurchaseCommon Stock | 609 | $10.92 | $6,652.17 |
DisclosureSEC source: 0001453687-25-000066 · wk-form4_1744406973.xml · nonDerivative · entry 6 SPRINGER TIMOTHY A · CIK 0001055624 · Director · 10% owner 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 8,637,273 Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.