According to recent filings covering the 90 days ending January 10, 2026, the three most significant insider holders at Cartesian Therapeutics are Director Timothy A Springer (9.30Mn shares), Director Murat Kalayoglu (5.07Mn shares), TenPercentOwner Elizabeth Hoge (4.56Mn shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Timothy A Springer | 9,302,798 | 06 Jan, 2026 | |
| Murat Kalayoglu | 5,066,837 | 06 Jan, 2026 | |
| Elizabeth Hoge | 4,555,260 | 15 Oct, 2024 | |
| Peter G Traber | Chief Medical Officer | 15,059 | 26 Sep, 2023 |
| Carsten Brunn | President And Ceo | 323,530 | 08 Jan, 2026 |
| Lloyd P. Johnston | Chief Operations Officer | 8,850 | 06 Jan, 2023 |
| Takashi Kei Kishimoto | Chief Scientific Officer | 7,510 | 01 Jun, 2023 |
| Aymeric Sallin | 5,933 | 04 Jan, 2024 | |
| Michael Singer | 152,352 | 06 Jan, 2026 | |
| Blaine Davis | Chief Financial Officer | 121,220 | 08 Jan, 2026 |
| Emily English | Chief Operations Officer | 94,226 | 06 Jan, 2026 |
| Kevin Tan | Chief Financial Officer | 2,566 | 05 Jan, 2022 |
| Christopher M Jewell | Chief Scientific Officer | 62,490 | 13 Jan, 2025 |
| Metin Kurtoglu | Chief Technology Officer | 62,258 | 07 Jan, 2025 |
| Milos Miljkovic | Chief Medical Officer | 58,820 | 08 Jan, 2026 |
| Timothy C Barabe | 56,966 | 06 Jan, 2026 | |
| Carrie Smith Cox | 15,629 | 06 Jan, 2025 | |
| Patrick J Zenner | 12,974 | 06 Jan, 2026 | |
| Nishan M Desilva | 11,366 | 06 Jan, 2026 | |
| Kemal Malik | 11,133 | 06 Jan, 2026 | |
| June Ann Seymour | Chief Accounting Officer | 6,500 | 06 Jan, 2026 |
| Adrian Ion Bot | 5,800 | 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 |
|---|---|---|---|---|---|---|---|---|
| 06 Jan, 2026 | Carsten Brunn | Common Stock | D | 23,766 | $6.82 | 323,530 | D | S |
| 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 | Timothy A Springer | Common Stock | A | 2,600 | $0.00 | 8,646,285 | D | A |
| 02 Jan, 2026 | Patrick J Zenner | Common Stock | A | 2,600 | $0.00 | 12,974 | D | A |
| 02 Jan, 2026 | Timothy C Barabe | Common Stock | A | 2,600 | $0.00 | 56,966 | D | A |
| 02 Jan, 2026 | Nishan M Desilva | Common Stock | A | 2,600 | $0.00 | 11,366 | D | A |
| 02 Jan, 2026 | Carsten Brunn | Common Stock | A | 143,200 | $0.00 | 347,296 | 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 | Michael Singer | Common Stock | A | 2,600 | $0.00 | 56,133 | D | A |
| 02 Jan, 2026 | Milos Miljkovic | Common Stock | A | 27,000 | $0.00 | 62,393 | D | A |
| 02 Jan, 2026 | Emily English | Common Stock | A | 24,000 | $0.00 | 94,226 | D | A |
| 02 Jan, 2026 | June Ann Seymour | Common Stock | A | 6,500 | $0.00 | 6,500 | D | A |
| 30 Dec, 2025 | Emily English | Common Stock | A | 7,500 | $3.30 | 70,226 | D | M |
| 16 Dec, 2025 | Adrian Ion Bot | - | - | 5,800 | D | |||
| 16 Dec, 2025 | Adrian Ion Bot | Common Stock | A | 5,800 | $0.00 | 5,800 | D | A |
| 04 Dec, 2025 | Timothy C Barabe | Common Stock | A | 30,000 | $6.86 | 54,366 | D | P |
| 28 Nov, 2025 | Emily English | Common Stock | A | 7,500 | $3.30 | 62,726 | D | M |