As of March 23, 2026, Caribou Biosciences's top three insider holders are Rachel E. Haurwitz (President And Ceo, 3.37Mn shares), Llc Fmr (Other, 1.46Mn shares), Barbara G Mcclung (Chief Legal Officer, 481.56K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Rachel E. Haurwitz | President And Ceo | 0 | 3,369,395 | 17 Mar, 2025 |
| Llc Fmr | 0 | 1,464,775 | 29 Jul, 2021 | |
| Barbara G Mcclung | Chief Legal Officer | 481,564 | 0 | 24 Feb, 2026 |
| Rachel E. Haurwitz | President And Ceo | 447,150 | 0 | 20 Feb, 2026 |
| Steven Kanner | Chief Scientific Officer | 431,556 | 0 | 21 Feb, 2025 |
| 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 |
| Timothy P Kelly | Chief Technology Officer | 73,125 | 0 | 27 Feb, 2026 |
| Sriram Ryali | Chief Financial Officer | 72,360 | 0 | 20 Feb, 2026 |
| Tina M. Albertson | Chief Medical Officer | 68,523 | 0 | 24 Feb, 2026 |
| Syed Ali-Aamir Rizvi | Chief Medical Officer | 59,373 | 0 | 20 Jan, 2023 |
| Jason O'Byrne | Chief Financial Officer | 59,224 | 0 | 22 Feb, 2024 |
* 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 |
| 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 | Ruhi Ahmad Khan | Common Stock | A | 45,000 | $0.00 | 111,936 | D | A |
| 20 Feb, 2026 | Tina M. Albertson | Common Stock | A | 55,000 | $0.00 | 69,589 | D | A |
| 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 | 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 |
| 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 | Timothy P Kelly | Option to purchase Common Stock | A | 202,500 | $0.00 | 202,500 | D | A |
| 20 Feb, 2026 | Tina M. Albertson | Option to purchase Common Stock | A | 247,500 | $0.00 | 247,500 | D | A |
| 20 Feb, 2026 | Scott Braunstein | Option to purchase Common Stock | A | 45,000 | $0.00 | 45,000 | D | A |
| 20 Feb, 2026 | Ran Zheng | Option to purchase Common Stock | A | 45,000 | $0.00 | 45,000 | D | A |
| 20 Feb, 2026 | Andrew Guggenhime | Option to purchase Common Stock | A | 45,000 | $0.00 | 45,000 | D | A |
| 20 Feb, 2026 | David Lee Johnson | Option to purchase Common Stock | A | 45,000 | $0.00 | 45,000 | D | A |
| 20 Feb, 2026 | Rachel E. Haurwitz | Common Stock | A | 151,700 | $0.00 | 447,150 | D | A |
| 20 Feb, 2026 | Natalie Sacks | Option to purchase Common Stock | A | 45,000 | $0.00 | 45,000 | D | A |
| 20 Feb, 2026 | Nancy Whiting | Option to purchase Common Stock | A | 45,000 | $0.00 | 45,000 | D | A |