Caribou Biosciences Inc
Ownership
Ownership Structure
Who owns Caribou Biosciences Inc (CRBU)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 96.0% of the shares are freely tradable; institutional investors hold 44.5%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Pfizer Inc | 4.38 | 4,690,431 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.51 | 3,767,228 | +0.0 | 03/31/2026 |
| Renaissance Technologies Corp | 2.42 | 2,590,497 | +58.0 | 03/31/2026 |
| Kynam Capital Management, LP | 2.34 | 2,503,302 | +0.0 | 06/30/2026 |
| BlackRock Inc | 2.00 | 2,143,085 | +0.1 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.81 | 3,013,973 | +0.0 | 08/31/2026 |
| iShares Russell 2000 ETF | 2.11 | 2,258,117 | -0.6 | 08/31/2026 |
| ACATIS Datini Valueflex Fonds A | 1.87 | 2,000,000 | +0.0 | 07/31/2026 |
| Canada Life US Small-Mid Cap Growth F | 1.35 | 1,444,168 | +0.0 | 06/30/2026 |
| Selectra J. Lamarck Biotech A | 1.33 | 1,430,600 | +0.0 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: September 28, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.