Cartesian Therapeutics's three largest insider shareholders as of May 30, 2026 are Timothy A Springer (Director, 8.65Mn shares), Elizabeth Hoge (TenPercentOwner, 5.31Mn shares), Murat Kalayoglu (TenPercentOwner, 5.31Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Timothy A Springer | - | 8,646,285 | 0 | 06 Jan, 2026 |
| Carrie Smith Cox | - | 390,881 | 0 | 04 Jan, 2024 |
| Patrick J Zenner | - | 12,974 | 0 | 06 Jan, 2026 |
| Timothy C Barabe | - | 56,966 | 0 | 06 Jan, 2026 |
| Peter G Traber | Chief Medical Officer | 451,826 | 0 | 26 Sep, 2023 |
| Nishan M Desilva | - | 11,366 | 0 | 06 Jan, 2026 |
| Lloyd P. Johnston | Chief Operations Officer | 265,515 | 0 | 06 Jan, 2023 |
| Takashi Kei Kishimoto | Chief Scientific Officer | 225,316 | 0 | 01 Jun, 2023 |
| Aymeric Sallin | - | 178,000 | 0 | 04 Jan, 2024 |
| Carsten Brunn | President And Ceo | 323,530 | 0 | 08 Jan, 2026 |
| Kemal Malik | - | 11,133 | 0 | 06 Jan, 2026 |
| Kevin Tan | Chief Financial Officer | 77,000 | 0 | 05 Jan, 2022 |
| Murat Kalayoglu | - | 0 | 5,313,261 | 06 Apr, 2026 |
| Michael Singer | - | 110,123 | 60,841 | 15 Nov, 2023 |
| Christopher M Jewell | Chief Scientific Officer | 62,490 | 0 | 13 Jan, 2025 |
| Milos Miljkovic | Chief Medical Officer | 58,820 | 0 | 08 Jan, 2026 |
| Metin Kurtoglu | Chief Technology Officer | 62,258 | 0 | 07 Jan, 2025 |
| Elizabeth Hoge | - | 0 | 5,313,261 | 06 Apr, 2026 |
| Emily English | Chief Operations Officer | 94,226 | 0 | 06 Jan, 2026 |
| June Ann Seymour | Chief Accounting Officer | 6,500 | 0 | 06 Jan, 2026 |
| Adrian Ion Bot | - | 5,800 | 0 | 18 Dec, 2025 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 02 Apr, 2026 | Elizabeth Hoge | Common Stock | A | 758,001 | - | 5,313,261 | I | M |
| 02 Apr, 2026 | Murat Kalayoglu | Common Stock | A | 758,001 | - | 5,313,261 | I | M |
| 02 Apr, 2026 | Elizabeth Hoge | Common Stock | A | 758,001 | - | 5,313,261 | I | M |
| 02 Apr, 2026 | Murat Kalayoglu | Common Stock | A | 758,001 | - | 5,313,261 | I | M |
| 02 Apr, 2026 | Murat Kalayoglu | Series A Non-Voting Convertible Preferred Stock | D | 22,740 | - | 33,662 | I | M |
| 02 Apr, 2026 | Elizabeth Hoge | Series A Non-Voting Convertible Preferred Stock | D | 22,740 | - | 33,662 | I | M |
| 02 Apr, 2026 | Elizabeth Hoge | Series A Non-Voting Convertible Preferred Stock | D | 22,740 | - | 33,662 | I | M |
| 02 Apr, 2026 | Murat Kalayoglu | Series A Non-Voting Convertible Preferred Stock | D | 22,740 | - | 33,662 | I | M |
| 13 Mar, 2026 | Michael Singer | Common Stock | D | 6,555 | $0.00 | 49,578 | D | G |
| 13 Mar, 2026 | Michael Singer | Common Stock | D | 6,555 | $0.00 | 49,578 | D | G |
| 13 Mar, 2026 | Michael Singer | Common Stock | D | 6,555 | $0.00 | 49,578 | D | G |
| 06 Jan, 2026 | Milos Miljkovic | Common Stock | D | 3,573 | $6.82 | 58,820 | D | S |
| 06 Jan, 2026 | Carsten Brunn | Common Stock | D | 23,766 | $6.82 | 323,530 | D | S |
| 06 Jan, 2026 | Milos Miljkovic | Common Stock | D | 3,573 | $6.82 | 58,820 | 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 | Kemal Malik | Common Stock | A | 2,600 | $0.00 | 11,133 | D | A |
| 02 Jan, 2026 | Emily English | Common Stock | A | 24,000 | $0.00 | 94,226 | D | A |
| 02 Jan, 2026 | Murat Kalayoglu | Common Stock | A | 2,600 | $0.00 | 511,577 | D | A |
| 02 Jan, 2026 | June Ann Seymour | Common Stock | A | 6,500 | $0.00 | 6,500 | D | A |