Cartesian Therapeutics's top three insider shareholders as of March 23, 2026 are Timothy A Springer (Director, 8.65Mn shares), Elizabeth Hoge (TenPercentOwner, 4.56Mn shares), Murat Kalayoglu (Director, 4.56Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Timothy A Springer | 8,646,285 | 0 | 06 Jan, 2026 | |
| Elizabeth Hoge | 0 | 4,555,260 | 15 Oct, 2024 | |
| Murat Kalayoglu | 0 | 4,555,260 | 15 Oct, 2024 | |
| Timothy A Springer | 0 | 656,513 | 11 Apr, 2025 | |
| Murat Kalayoglu | 511,577 | 0 | 06 Jan, 2026 | |
| Peter G Traber | Chief Medical Officer | 451,826 | 0 | 26 Sep, 2023 |
| Aymeric Sallin | 178,000 | 0 | 04 Jan, 2024 | |
| Blaine Davis | Chief Financial Officer | 121,220 | 0 | 08 Jan, 2026 |
| Michael Singer | 0 | 96,219 | 10 Apr, 2024 | |
| Emily English | Chief Operations Officer | 94,226 | 0 | 06 Jan, 2026 |
| Kevin Tan | Chief Financial Officer | 77,000 | 0 | 05 Jan, 2022 |
| Christopher M Jewell | Chief Scientific Officer | 62,490 | 0 | 13 Jan, 2025 |
| Metin Kurtoglu | Chief Technology Officer | 62,258 | 0 | 07 Jan, 2025 |
| Milos Miljkovic | Chief Medical Officer | 58,820 | 0 | 08 Jan, 2026 |
| Timothy C Barabe | 56,966 | 0 | 06 Jan, 2026 | |
| Michael Singer | 49,578 | 0 | 13 Mar, 2026 | |
| Patrick J Zenner | 12,974 | 0 | 06 Jan, 2026 | |
| Nishan M Desilva | 11,366 | 0 | 06 Jan, 2026 | |
| Kemal Malik | 11,133 | 0 | 06 Jan, 2026 | |
| June Ann Seymour | Chief Accounting Officer | 6,500 | 0 | 06 Jan, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 13 Mar, 2026 | Michael Singer | Common Stock | D | 6,555 | $0.00 | 49,578 | D | G |
| 06 Jan, 2026 | Blaine Davis | Common Stock | D | 10,591 | $6.82 | 121,220 | D | S |
| 06 Jan, 2026 | Milos Miljkovic | Common Stock | D | 3,573 | $6.82 | 58,820 | D | S |
| 02 Jan, 2026 | Michael Singer | Common Stock | A | 2,600 | $0.00 | 56,133 | D | A |
| 02 Jan, 2026 | Emily English | Common Stock | A | 24,000 | $0.00 | 94,226 | D | A |
| 02 Jan, 2026 | Timothy C Barabe | Common Stock | A | 2,600 | $0.00 | 56,966 | D | A |
| 02 Jan, 2026 | Patrick J Zenner | Common Stock | A | 2,600 | $0.00 | 12,974 | D | A |
| 02 Jan, 2026 | Timothy A Springer | Common Stock | A | 2,600 | $0.00 | 8,646,285 | D | A |
| 02 Jan, 2026 | June Ann Seymour | Common Stock | A | 6,500 | $0.00 | 6,500 | D | A |
| 02 Jan, 2026 | Milos Miljkovic | Common Stock | A | 27,000 | $0.00 | 62,393 | D | A |
| 02 Jan, 2026 | Nishan M Desilva | Common Stock | A | 2,600 | $0.00 | 11,366 | D | A |
| 02 Jan, 2026 | Kemal Malik | Common Stock | A | 2,600 | $0.00 | 11,133 | D | A |
| 02 Jan, 2026 | Blaine Davis | Common Stock | A | 37,000 | $0.00 | 131,811 | D | A |
| 02 Jan, 2026 | Murat Kalayoglu | Common Stock | A | 2,600 | $0.00 | 511,577 | D | A |
| 02 Jan, 2026 | Timothy C Barabe | Stock Option (Right to Buy) | A | 7,800 | $0.00 | 7,800 | D | A |
| 02 Jan, 2026 | Patrick J Zenner | Stock Option (Right to Buy) | A | 7,800 | $0.00 | 7,800 | D | A |
| 02 Jan, 2026 | Kemal Malik | Stock Option (Right to Buy) | A | 7,800 | $0.00 | 7,800 | D | A |
| 02 Jan, 2026 | June Ann Seymour | Employee Stock Option (right to buy) | A | 19,000 | $0.00 | 19,000 | D | A |
| 02 Jan, 2026 | Emily English | Employee Stock Option (right to buy) | A | 71,000 | $0.00 | 71,000 | D | A |
| 02 Jan, 2026 | Blaine Davis | Employee Stock Option (right to buy) | A | 109,000 | $0.00 | 109,000 | D | A |