CRBU
Caribou Biosciences, Inc.
NASDAQ · Healthcare · Biotechnology · US
$1.57
+0.00%0
Insider buys (3m)
0
Insider sells (3m)
$0.00
Net value (3m)
-18.5%
Price return (3m)
Form 4 filings
| Date | Insider | Activity | Shares | Price |
|---|---|---|---|---|
| Feb 27, 2026 | Kelly Timothy P · officer: Chief Technology Officer | Sale | 6,228 | $1.93 |
| Feb 24, 2026 | Albertson Tina M. · officer: Chief Medical Officer | A-Award | 55,000 | $0.00 |
| Feb 24, 2026 | Khan Ruhi Ahmad · officer: Chief Business Officer | A-Award | 202,500 | $1.80 |
| Feb 24, 2026 | Khan Ruhi Ahmad · officer: Chief Business Officer | Sale | 6,938 | $1.96 |
| Feb 24, 2026 | Khan Ruhi Ahmad · officer: Chief Business Officer | A-Award | 45,000 | $0.00 |
| Feb 24, 2026 | MCCLUNG BARBARA G · officer: Chief Legal Officer | A-Award | 202,500 | $1.80 |
| Feb 24, 2026 | MCCLUNG BARBARA G · officer: Chief Legal Officer | Sale | 6,938 | $1.96 |
| Feb 24, 2026 | MCCLUNG BARBARA G · officer: Chief Legal Officer | A-Award | 45,000 | $0.00 |
| Feb 24, 2026 | Kelly Timothy P · officer: Chief Technology Officer | A-Award | 202,500 | $1.80 |
| Feb 24, 2026 | Kelly Timothy P · officer: Chief Technology Officer | Sale | 3,147 | $1.96 |
| Feb 24, 2026 | Kelly Timothy P · officer: Chief Technology Officer | A-Award | 45,000 | $0.00 |
| Feb 24, 2026 | Albertson Tina M. · officer: Chief Medical Officer | Sale | 1,066 | $1.96 |
| Feb 24, 2026 | Albertson Tina M. · officer: Chief Medical Officer | A-Award | 247,500 | $1.80 |
| Feb 20, 2026 | Haurwitz Rachel E. · director, officer: President and CEO | A-Award | 151,700 | $0.00 |
| Feb 20, 2026 | Ryali Sriram · officer: Chief Financial Officer | A-Award | 55,000 | $0.00 |
| Feb 20, 2026 | Braunstein Scott · director | A-Award | 45,000 | $1.80 |
| Feb 20, 2026 | GUGGENHIME ANDREW · director | A-Award | 45,000 | $1.80 |
| Feb 20, 2026 | JOHNSON DAVID LEE · director | A-Award | 45,000 | $1.80 |
| Feb 20, 2026 | Richardson-Heron Dara · director | A-Award | 45,000 | $1.80 |
| Feb 20, 2026 | Sacks Natalie · director | A-Award | 45,000 | $1.80 |
| Feb 20, 2026 | Whiting Nancy · director | A-Award | 45,000 | $1.80 |
| Feb 20, 2026 | Zheng Ran · director | A-Award | 45,000 | $1.80 |
| Feb 20, 2026 | Ryali Sriram · officer: Chief Financial Officer | A-Award | 247,500 | $1.80 |
| Feb 20, 2026 | Haurwitz Rachel E. · director, officer: President and CEO | A-Award | 682,500 | $1.80 |
| Mar 17, 2025 | Haurwitz Rachel E. · director, officer: President and CEO | Purchase | 20,000 | $1.02 |
| Feb 21, 2025 | Zheng Ran · director | A-Award | 40,500 | $1.41 |
| Feb 21, 2025 | Haurwitz Rachel E. · director, officer: President and CEO | A-Award | 618,250 | $1.41 |
| Feb 21, 2025 | Haurwitz Rachel E. · director, officer: President and CEO | A-Award | 136,750 | $0.00 |
| Feb 21, 2025 | Albertson Tina M. · officer: Chief Medical Officer | A-Award | 66,137 | $1.41 |
| Feb 21, 2025 | Albertson Tina M. · officer: Chief Medical Officer | A-Award | 14,589 | $0.00 |
Institutional positioning
13F filings over the trailing two quarters
New 51Increased 74Reduced 64Sold out 22
| Filer | Action | Shares | Filed |
|---|---|---|---|
| BlackRock, Inc. | Increased | 7,815,843 | Aug 7, 2026 |
| PFIZER INC | Unchanged | 4,690,431 | May 12, 2026 |
| PFIZER INC | Unchanged | 4,690,431 | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 4,208,568 | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 3,767,228 | May 15, 2026 |
| MACKENZIE FINANCIAL CORP | Increased | 3,650,796 | Aug 13, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 2,773,545 | Aug 13, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 2,590,497 | May 14, 2026 |
| Kynam Capital Management, LP | Unchanged | 2,503,302 | Aug 14, 2026 |
| KYNAM CAPITAL MANAGEMENT, LP | Unchanged | 2,503,302 | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 2,374,894 | Aug 12, 2026 |
| BLACKROCK, INC. | Increased | 2,143,085 | May 13, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 1,774,474 | Aug 13, 2026 |
| TWO SIGMA INVESTMENTS, LP | Increased | 1,759,934 | May 15, 2026 |
| STATE STREET CORP | Increased | 1,632,914 | Aug 7, 2026 |
Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Feb 27, 2026