As of May 30, 2026, Caribou Biosciences's top three insider holders are Rachel E. Haurwitz (President And Ceo, 3.37Mn shares), Llc Fmr (Other, 3.32Mn shares), Barbara G Mcclung (Chief Legal Officer, 481.56K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Llc Fmr | - | 0 | 3,323,284 | 29 Jul, 2021 |
| Barbara G Mcclung | Chief Legal Officer | 481,564 | 0 | 24 Feb, 2026 |
| Rachel E. Haurwitz | President And Ceo | 0 | 3,369,395 | 17 Mar, 2025 |
| Timothy P Kelly | Chief Technology Officer | 73,125 | 0 | 27 Feb, 2026 |
| Sriram Ryali | Chief Financial Officer | 72,360 | 0 | 20 Feb, 2026 |
| Steven Kanner | Chief Scientific Officer | 431,556 | 0 | 21 Feb, 2025 |
| Jason O'Byrne | Chief Financial Officer | 59,224 | 0 | 22 Feb, 2024 |
| Ryan Fischesser | Vp Of Finance And Controller | 118,854 | 0 | 22 Nov, 2024 |
| Ruhi Ahmad Khan | Chief Business Officer | 104,998 | 0 | 24 Feb, 2026 |
| Syed Ali-Aamir Rizvi | Chief Medical Officer | 65,000 | 0 | 25 Jan, 2022 |
| Tina M. Albertson | Chief Medical Officer | 68,523 | 0 | 24 Feb, 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 |
|---|---|---|---|---|---|---|---|---|
| 25 Feb, 2026 | Timothy P Kelly | Common Stock | D | 6,228 | $1.93 | 73,125 | D | S |
| 25 Feb, 2026 | Timothy P Kelly | Common Stock | D | 6,228 | $1.93 | 73,125 | D | S |
| 20 Feb, 2026 | Timothy P Kelly | Common Stock | A | 45,000 | $0.00 | 82,500 | D | A |
| 20 Feb, 2026 | Barbara G Mcclung | Common Stock | A | 45,000 | $0.00 | 488,502 | D | A |
| 20 Feb, 2026 | Timothy P Kelly | Common Stock | A | 45,000 | $0.00 | 82,500 | D | A |
| 20 Feb, 2026 | Barbara G Mcclung | Common Stock | A | 45,000 | $0.00 | 488,502 | D | A |
| 20 Feb, 2026 | Tina M. Albertson | Common Stock | A | 55,000 | $0.00 | 69,589 | D | A |
| 20 Feb, 2026 | Ruhi Ahmad Khan | Common Stock | A | 45,000 | $0.00 | 111,936 | D | A |
| 20 Feb, 2026 | Ruhi Ahmad Khan | Common Stock | A | 45,000 | $0.00 | 111,936 | D | A |
| 24 Feb, 2026 | Timothy P Kelly | Common Stock | D | 3,147 | $1.96 | 79,353 | D | S |
| 24 Feb, 2026 | Ruhi Ahmad Khan | Common Stock | D | 6,938 | $1.96 | 104,998 | D | S |
| 24 Feb, 2026 | Timothy P Kelly | Common Stock | D | 3,147 | $1.96 | 79,353 | D | S |
| 24 Feb, 2026 | Ruhi Ahmad Khan | Common Stock | D | 6,938 | $1.96 | 104,998 | D | S |
| 24 Feb, 2026 | Barbara G Mcclung | Common Stock | D | 6,938 | $1.96 | 481,564 | D | S |
| 24 Feb, 2026 | Tina M. Albertson | Common Stock | D | 1,066 | $1.96 | 68,523 | D | S |
| 24 Feb, 2026 | Barbara G Mcclung | Common Stock | D | 6,938 | $1.96 | 481,564 | D | S |
| 20 Feb, 2026 | Barbara G Mcclung | Option to purchase Common Stock | A | 202,500 | $0.00 | 202,500 | D | A |
| 20 Feb, 2026 | Barbara G Mcclung | Option to purchase Common Stock | A | 202,500 | $0.00 | 202,500 | D | A |
| 20 Feb, 2026 | Ruhi Ahmad Khan | Option to purchase Common Stock | A | 202,500 | $0.00 | 202,500 | D | A |
| 20 Feb, 2026 | Ruhi Ahmad Khan | Option to purchase Common Stock | A | 202,500 | $0.00 | 202,500 | D | A |