Data spanning the past 90 days through December 12, 2025 reveals that Caribou Biosciences's three principal insider shareholders consist of Other Llc Fmr (1.46Mn shares), Chief Legal Officer Barbara G Mcclung (443.50K shares), Chief Scientific Officer Steven Kanner (431.56K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Llc Fmr | 1,464,775 | 29 Jul, 2021 | |
| Barbara G Mcclung | Chief Legal Officer | 443,502 | 21 Feb, 2025 |
| Steven Kanner | Chief Scientific Officer | 431,556 | 21 Feb, 2025 |
| Rachel E. Haurwitz | President And CEO | 295,450 | 17 Mar, 2025 |
| Ryan Fischesser | VP Of Finance And Controller | 118,854 | 22 Nov, 2024 |
| Ruhi Ahmad Khan | Chief Business Officer | 66,936 | 21 Feb, 2025 |
| Syed Ali-Aamir Rizvi | Chief Medical Officer | 59,373 | 20 Jan, 2023 |
| Jason O'Byrne | Chief Financial Officer | 59,224 | 22 Feb, 2024 |
| Timothy P Kelly | Chief Technology Officer | 37,500 | 21 Feb, 2025 |
| Sriram Ryali | Chief Financial Officer | 17,360 | 30 Jan, 2025 |
| Tina M. Albertson | Chief Medical Officer | 14,589 | 21 Feb, 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 |
|---|---|---|---|---|---|---|---|---|
| 14 Mar, 2025 | Rachel E. Haurwitz | Common Stock | A | 20,000 | $1.02 | 295,450 | D | P |
| 20 Feb, 2025 | Barbara G Mcclung | Common Stock | A | 37,500 | $0.00 | 447,066 | D | A |
| 20 Feb, 2025 | Timothy P Kelly | Common Stock | A | 37,500 | $0.00 | 37,500 | D | A |
| 20 Feb, 2025 | Steven Kanner | Common Stock | A | 37,500 | $0.00 | 435,120 | D | A |
| 20 Feb, 2025 | Ruhi Ahmad Khan | Common Stock | A | 37,500 | $0.00 | 70,500 | D | A |
| 20 Feb, 2025 | Tina M. Albertson | Common Stock | A | 14,589 | $0.00 | 14,589 | D | A |
| 20 Feb, 2025 | Rachel E. Haurwitz | Common Stock | A | 136,750 | $0.00 | 295,450 | D | A |
| 21 Feb, 2025 | Steven Kanner | Common Stock | D | 3,564 | $1.35 | 431,556 | D | S |
| 21 Feb, 2025 | Ruhi Ahmad Khan | Common Stock | D | 3,564 | $1.35 | 66,936 | D | S |
| 21 Feb, 2025 | Barbara G Mcclung | Common Stock | D | 3,564 | $1.35 | 443,502 | D | S |
| 29 Jan, 2025 | Sriram Ryali | Common Stock | A | 17,360 | $1.42 | 17,360 | D | P |
| 20 Nov, 2024 | Ryan Fischesser | - | - | 118,854 | D | |||
| 20 Nov, 2024 | Ryan Fischesser | Common Stock | A | 25,000 | $0.00 | 118,854 | D | A |
| 20 Feb, 2024 | Ruhi Ahmad Khan | Common Stock | A | 33,000 | $0.00 | 33,000 | D | A |
| 20 Feb, 2024 | Steven Kanner | Common Stock | A | 33,000 | $0.00 | 387,037 | D | A |
| 20 Feb, 2024 | Ruhi Ahmad Khan | - | - | 33,000 | D | |||
| 20 Feb, 2024 | Jason O'Byrne | Common Stock | A | 33,000 | $0.00 | 59,224 | D | A |
| 20 Feb, 2024 | Barbara G Mcclung | Common Stock | A | 33,000 | $0.00 | 409,566 | D | A |
| 20 Feb, 2024 | Rachel E. Haurwitz | Common Stock | A | 118,700 | $0.00 | 158,700 | D | A |
| 06 Feb, 2024 | Steven Kanner | - | - | 354,037 | D |