Caribou Biosciences
Develops genome-edited allogeneic CAR-T candidates for blood cancers.
$1.65
After-hours close+0.04 (+2.17%)
At close$1.62(−2.71%)
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Breakdown13F · Form 4
Institutions 49.66%49.25M sharesInsiders 4.66%4.62M sharesOther 45.68%45.31M shares
Shares outstanding 99.18M · Float 89.53M · 90.3% free float
Institutions13F, as of Jun 30, 2026
145 holders · 49.25M shares · 25 new positions · 70 increased · 25 reduced · 23 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Vanguard Capital Management LLC | 4.21M | 4.24% | +441.3K | Aug 13, 2026 |
| Geode Capital Management, LLC | 2.37M | 2.39% | +1.36M | Aug 12, 2026 |
| Two Sigma Investments, LP | 1.05M | 1.05% | −713.7K | Aug 14, 2026 |
| Sixth Street Partners Management Company, L.P. | 775.8K | 0.78% | +775.8Knew | Aug 14, 2026 |
| Vanguard Portfolio Management LLC | 613.8K | 0.62% | +613.8Knew | Aug 13, 2026 |
| Vanguard Fiduciary Trust Co | 606.4K | 0.61% | +86.3K | Aug 13, 2026 |
| Gsa Capital Partners LLP | 463.4K | 0.47% | −17.3K | Aug 6, 2026 |
| Marshall Wace, LLP | 375.7K | 0.38% | −830.0K | Aug 13, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 7.20% | 7.18M | 13G | Jul 27, 2026 ↗ |
| Rachel E. Haurwitzincl. Felix Adler, The City Canyon Family Trust dated May 31, 2021 | 5.00% | 4.72M | 13D | Apr 25, 2025 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Rachel E. Haurwitz | director, officer: President and CEO | 3.82M | 3.85% | Feb 20, 2026 |
| Barbara G. Mcclung | officer: Chief Legal Officer | 481.6K | 0.49% | Feb 24, 2026 |
| Ruhi Ahmad Khan | officer: Chief Business Officer | 105.0K | 0.11% | Feb 24, 2026 |
| Timothy P. Kelly | officer: Chief Technology Officer | 73.1K | 0.07% | Feb 27, 2026 |
| Sriram Ryali | officer: Chief Financial Officer | 72.4K | 0.07% | Feb 20, 2026 |
| Tina M. Albertson | officer: Chief Medical Officer | 68.5K | 0.07% | Feb 24, 2026 |
1 ten-percent owner holds 349.6K shares by Form 4, outside the officers-and-directors figure above · 5 people have not refiled in the last 18 months (686.6K shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Feb 25, 2026 | Timothy P. Kellyofficer: Chief Technology Officer | Sale | 6,228 | $1.93 | 73,125 |
| Feb 24, 2026 | Tina M. Albertsonofficer: Chief Medical Officer | Sale | 1,066 | $1.96 | 68,523 |
| Feb 24, 2026 | Ruhi Ahmad Khanofficer: Chief Business Officer | Sale | 6,938 | $1.96 | 104,998 |
| Feb 24, 2026 | Barbara G. Mcclungofficer: Chief Legal Officer | Sale | 6,938 | $1.96 | 481,564 |
| Feb 24, 2026 | Timothy P. Kellyofficer: Chief Technology Officer | Sale | 3,147 | $1.96 | 79,353 |
CongressHouse and Senate disclosures
Not reported.