Caribou Biosciences, Inc. (CRBU) ownership: Top institutional holder: Pfizer Inc ($8.35M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| Pfizer Inc | 4690431.00 | $8.35M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3767228.00 | $7.16M | 2026-03-31 |
| VANGUARD GROUP INC | 4304198.00 | $6.84M | 2025-12-31 |
| RENAISSANCE TECHNOLOGIES LLC | 2590497.00 | $4.92M | 2026-03-31 |
| Kynam Capital Management, LP | 2503302.00 | $4.76M | 2026-03-31 |
| BlackRock, Inc. | 2143085.00 | $4.07M | 2026-03-31 |
| TWO SIGMA INVESTMENTS, LP | 1759934.00 | $3.34M | 2026-03-31 |
| BANK OF AMERICA CORP /DE/ | 1297167.00 | $2.46M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-02-25 | |
| Sell | null | 2026-02-24 | |
| Sell | null | 2026-02-24 | |
| Sell | null | 2026-02-24 | |
| Sell | null | 2026-02-24 | |
| Sell | null | 2026-02-20 | |
| Sell | null | 2026-02-20 | |
| Sell | null | 2026-02-20 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.