Caribou Biosciences, Inc. (CRBU) · Insider trading
What Caribou Biosciences's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.
Bought, 12 months
$0
0 insiders, 0 trades
Sold, 12 months
$47,474
4 insiders, 4% under a plan
Net, 12 months
−$47,474
bought less sold
Latest filing
2026-02-27
filings read to 2026-10-19
Who traded, two years
| Insider | Bought | Sold | Trades | Last trade | Holds after |
|---|---|---|---|---|---|
| Ryali SriramChief Financial Officer | $24,651 | – | 1 | 2025-01-29 | 17,360 |
| Haurwitz Rachel E.Director, President and CEO | $20,400 | – | 1 | 2025-03-14 | – |
| McClung Barbara GChief Legal Officer | – | $18,410 | 2 | 2026-02-24 | 481,564 |
| Khan Ruhi AhmadChief Business Officer | – | $18,410 | 2 | 2026-02-24 | 104,998 |
| Kelly Timothy PChief Technology Officer | – | $18,188 | 2 | 2026-02-25 | 73,125 |
| Kanner StevenChief Scientific Officer | – | $4,811 | 1 | 2025-02-21 | 431,556 |
| Albertson Tina M.Chief Medical Officer | – | $2,089 | 1 | 2026-02-24 | 68,523 |
Open-market purchases and sales
Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.
| Date | Insider | Trade | Shares | Price | Value | Holds after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-02-25 | Kelly Timothy PChief Technology Officer | Sale | 6,228 | 1.93 | $12,020 | 73,125 | Form 4 |
| 2026-02-24 | McClung Barbara GChief Legal Officer | Sale | 6,938 | 1.96 | $13,598 | 481,564 | Form 4 |
| 2026-02-24 | Kelly Timothy PChief Technology Officer | Sale | 3,147 | 1.96 | $6,168 | 79,353 | Form 4 |
| 2026-02-24 | Khan Ruhi AhmadChief Business Officer | Sale | 6,938 | 1.96 | $13,598 | 104,998 | Form 4 |
| 2026-02-24 | Albertson Tina M.Chief Medical Officer | Saleplan | 1,066 | 1.96 | $2,089 | 68,523 | Form 4 |
| 2025-03-14 | Haurwitz Rachel E.Director, President and CEO | Buyindirect | 20,000 | 1.02 | $20,400 | 3,369,395 | Form 4 |
| 2025-02-21 | McClung Barbara GChief Legal Officer | Sale | 3,564 | 1.35 | $4,811 | 443,502 | Form 4 |
| 2025-02-21 | Kanner StevenChief Scientific Officer | Sale | 3,564 | 1.35 | $4,811 | 431,556 | Form 4 |
| 2025-02-21 | Khan Ruhi AhmadChief Business Officer | Sale | 3,564 | 1.35 | $4,811 | 66,936 | Form 4 |
| 2025-01-29 | Ryali SriramChief Financial Officer | Buy | 17,360 | 1.42 | $24,651 | 17,360 | Form 4 |
Grants, exercises and other transactions
Pay, tax and paperwork rather than a choice to trade at the market price. Two years.
13 × grant or award
Show them
| Date | Insider | What | Shares | Price | Holds after | Filing |
|---|---|---|---|---|---|---|
| 2026-02-20 | McClung Barbara GChief Legal Officer | Grant or award A | +45,000 | – | 488,502 | Form 4 |
| 2026-02-20 | Kelly Timothy PChief Technology Officer | Grant or award A | +45,000 | – | 82,500 | Form 4 |
| 2026-02-20 | Khan Ruhi AhmadChief Business Officer | Grant or award A | +45,000 | – | 111,936 | Form 4 |
| 2026-02-20 | Albertson Tina M.Chief Medical Officer | Grant or award A | +55,000 | – | 69,589 | Form 4 |
| 2026-02-20 | Haurwitz Rachel E.Director, President and CEO | Grant or award A | +151,700 | – | 447,150 | Form 4 |
| 2026-02-20 | Ryali SriramChief Financial Officer | Grant or award A | +55,000 | – | 72,360 | Form 4 |
| 2025-02-20 | McClung Barbara GChief Legal Officer | Grant or award A | +37,500 | – | 447,066 | Form 4 |
| 2025-02-20 | Haurwitz Rachel E.Director, President and CEO | Grant or award A | +136,750 | – | 295,450 | Form 4 |
| 2025-02-20 | Kelly Timothy PChief Technology Officer | Grant or award A | +37,500 | – | 37,500 | Form 4 |
| 2025-02-20 | Kanner StevenChief Scientific Officer | Grant or award A | +37,500 | – | 435,120 | Form 4 |
| 2025-02-20 | Khan Ruhi AhmadChief Business Officer | Grant or award A | +37,500 | – | 70,500 | Form 4 |
| 2025-02-20 | Albertson Tina M.Chief Medical Officer | Grant or award A | +14,589 | – | 14,589 | Form 4 |
| 2024-11-20 | Fischesser RyanVP of Finance and Controller | Grant or award A | +25,000 | – | 118,854 | Form 4 |
How to read it
- Buy, sale
- Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
- Plan
- A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
- Holds after
- The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
- Value
- Shares times the price the form reports, which is often an average over several fills on the day.
Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.