Caribou Biosciences, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Haurwitz Rachel E. | President and CEO | Purchase | 20,000 | $1.02 | $20,400 | 3,369,395 | Mar 14, 2025 |
| MCCLUNG BARBARA G | Chief Legal Officer | Award / Grant | 37,500 | — | — | 447,066 | Feb 21, 2025 |
| Haurwitz Rachel E. | President and CEO | Award / Grant | 136,750 | — | — | 295,450 | Feb 20, 2025 |
| Albertson Tina M. | Chief Medical Officer | Award / Grant | 14,589 | — | — | 14,589 | Feb 20, 2025 |
| Khan Ruhi Ahmad | Chief Business Officer | Sale | 3,564 | $1.35 | $4,811 | 66,936 | Feb 20, 2025 |
| Kelly Timothy P | Chief Technology Officer | Award / Grant | 37,500 | — | — | 37,500 | Feb 20, 2025 |
| Kanner Steven | Chief Scientific Officer | Sale | 3,564 | $1.35 | $4,811 | 431,556 | Feb 20, 2025 |
| Ryali Sriram | Chief Financial Officer | Purchase | 17,360 | $1.42 | $24,651 | 17,360 | Jan 29, 2025 |
| Fischesser Ryan | VP of Finance and Controller | Award / Grant | 25,000 | — | — | 118,854 | Nov 20, 2024 |
| O'Byrne Jason | Chief Financial Officer | Award / Grant | 33,000 | — | — | 59,224 | Feb 20, 2024 |
| MCCLUNG BARBARA G | Chief Legal Officer | Award / Grant | 33,000 | — | — | 409,566 | Feb 20, 2024 |
| Khan Ruhi Ahmad | Chief Business Officer | Award / Grant | 33,000 | — | — | 33,000 | Feb 20, 2024 |
| Haurwitz Rachel E. | President and CEO | Award / Grant | 118,700 | — | — | 158,700 | Feb 20, 2024 |
| Kanner Steven | Chief Scientific Officer | Award / Grant | 33,000 | — | — | 387,037 | Feb 20, 2024 |
| Kanner Steven | Chief Scientific Officer | Option Exercise | 30,577 | $2.69 | $82,252 | 354,037 | Feb 6, 2024 |
| Haurwitz Rachel E. | President and CEO | Option Exercise | 10,000 | $2.96 | $29,600 | 40,000 | Jun 8, 2023 |
| Haurwitz Rachel E. | President and CEO | Option Exercise | 10,000 | $2.96 | $29,600 | 30,000 | Mar 20, 2023 |
| Rizvi Syed Ali-aamir | Chief Medical Officer | Sale | 5,627 | $6.31 | $35,506 | 59,373 | Jan 19, 2023 |
| Kanner Steven | Chief Scientific Officer | Option Exercise | 21,401 | $2.69 | $57,569 | 323,460 | Dec 2, 2022 |
| Fischesser Ryan | VP of Finance and Controller | Sale | 10,000 | $10.80 | $108,000 | 110,366 | Oct 6, 2022 |
| MCCLUNG BARBARA G | Chief Legal Officer | Option Exercise | 27,518 | $2.69 | $74,023 | 376,566 | Sep 15, 2022 |
| Kanner Steven | Chief Scientific Officer | Option Exercise | 43,248 | $2.69 | $116,337 | 345,307 | Aug 25, 2022 |
| Fischesser Ryan | VP of Finance and Controller | Award / Grant | 4,848 | — | — | 120,366 | Aug 22, 2022 |
| Kanner Steven | Chief Scientific Officer | Option Exercise | 68,306 | $1.81 | $123,634 | 295,945 | May 13, 2022 |
| Haurwitz Rachel E. | President and CEO | Option Exercise | 10,000 | $2.96 | $29,600 | 20,000 | May 9, 2022 |
| Fischesser Ryan | VP of Finance and Controller | Option Exercise | 1,136 | $2.69 | $3,056 | 114,380 | May 5, 2022 |
| Fischesser Ryan | VP of Finance and Controller | Option Exercise | 1,138 | $4.11 | $4,677 | 113,244 | Mar 15, 2022 |
| Kanner Steven | Chief Scientific Officer | Option Exercise | 1,549 | $4.11 | $6,366 | 227,639 | Mar 4, 2022 |
| O'Byrne Jason | Chief Financial Officer | Option Exercise | 24,336 | $4.11 | $100,021 | 24,336 | Feb 8, 2022 |
| Haurwitz Rachel E. | President and CEO | Option Exercise | 10,000 | $2.96 | $29,600 | 3,359,395 | Jan 26, 2022 |
| Haurwitz Rachel E. | President and CEO | Option Exercise | 10,000 | $2.96 | $29,600 | 10,000 | Jan 26, 2022 |
| Rizvi Syed Ali-aamir | Chief Medical Officer | Award / Grant | 60,000 | — | — | 65,000 | Jan 25, 2022 |
| Fischesser Ryan | VP of Finance and Controller | Purchase | 569 | $2.69 | $1,531 | 102,264 | Jan 11, 2022 |
| Fischesser Ryan | VP of Finance and Controller | Purchase | 1,136 | $2.69 | $3,056 | 101,695 | Dec 20, 2021 |
| MCCLUNG BARBARA G | Chief Legal Officer | Purchase | 6,115 | $2.69 | $16,449 | 348,971 | Dec 7, 2021 |
| MCCLUNG BARBARA G | Chief Legal Officer | Purchase | 9,176 | $2.69 | $24,683 | 342,801 | Oct 20, 2021 |
| Kanner Steven | Chief Scientific Officer | Purchase | 698 | $1.81 | $1,263 | 200,417 | Oct 12, 2021 |
| Fischesser Ryan | VP of Finance and Controller | Purchase | 1,746 | $2.69 | $4,697 | 100,559 | Oct 11, 2021 |
| Haurwitz Rachel E. | President and CEO | Gift | 3,349,395 | — | — | 3,349,395 | Sep 27, 2021 |
| FMR LLC | — | C | 770,510 | — | — | 770,510 | Jul 27, 2021 |