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Caribou Biosciences, Inc. (CRBU)

Caribou Biosciences, Inc. (CRBU) Insider Trading

Directors, officers and holders of more than 10% of CRBU report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 50 transactions on file: 2 with code P, 8 with code S and 40 with other codes.

DateInsiderCodeShares
Feb 25, 2026Kelly Timothy PS Sale6,228
Feb 24, 2026MCCLUNG BARBARA GS Sale6,938
Feb 24, 2026Khan Ruhi AhmadS Sale6,938
Feb 24, 2026Kelly Timothy PS Sale3,147
Feb 24, 2026Albertson Tina M.S Sale1,066
Feb 20, 2026Haurwitz Rachel E.A Award682,500
Feb 20, 2026Kelly Timothy PA Award202,500
Feb 20, 2026MCCLUNG BARBARA GA Award202,500
Feb 20, 2026Albertson Tina M.A Award55,000
Feb 20, 2026Albertson Tina M.A Award247,500
Feb 20, 2026Khan Ruhi AhmadA Award202,500
Feb 20, 2026Ryali SriramA Award55,000
Feb 20, 2026Haurwitz Rachel E.A Award151,700
Feb 20, 2026Kelly Timothy PA Award45,000
Feb 20, 2026Whiting NancyA Award45,000
Feb 20, 2026JOHNSON DAVID LEEA Award45,000
Feb 20, 2026GUGGENHIME ANDREWA Award45,000
Feb 20, 2026Braunstein ScottA Award45,000
Feb 20, 2026Ryali SriramA Award247,500
Feb 20, 2026Khan Ruhi AhmadA Award45,000
Feb 20, 2026Sacks NatalieA Award45,000
Feb 20, 2026Richardson-Heron DaraA Award45,000
Feb 20, 2026Zheng RanA Award45,000
Feb 20, 2026MCCLUNG BARBARA GA Award45,000
Mar 14, 2025Haurwitz Rachel E.P Purchase20,000
Feb 21, 2025Khan Ruhi AhmadS Sale3,564
Feb 21, 2025MCCLUNG BARBARA GS Sale3,564
Feb 21, 2025Kanner StevenS Sale3,564
Feb 20, 2025GUGGENHIME ANDREWA Award40,500
Feb 20, 2025Albertson Tina M.A Award14,589
Feb 20, 2025MCCLUNG BARBARA GA Award37,500
Feb 20, 2025Khan Ruhi AhmadA Award37,500
Feb 20, 2025Kelly Timothy PA Award37,500
Feb 20, 2025Kanner StevenA Award37,500
Feb 20, 2025Haurwitz Rachel E.A Award618,250
Feb 20, 2025Zheng RanA Award40,500
Feb 20, 2025Richardson-Heron DaraA Award40,500
Feb 20, 2025JOHNSON DAVID LEEA Award40,500
Feb 20, 2025Haurwitz Rachel E.A Award136,750
Feb 20, 2025Albertson Tina M.A Award66,137
Feb 20, 2025Braunstein ScottA Award40,500
Feb 20, 2025MCCLUNG BARBARA GA Award170,000
Feb 20, 2025Khan Ruhi AhmadA Award170,000
Feb 20, 2025Kelly Timothy PA Award170,000
Feb 20, 2025Kanner StevenA Award170,000
Feb 20, 2025Whiting NancyA Award40,500
Feb 20, 2025Sacks NatalieA Award40,500
Jan 29, 2025Ryali SriramP Purchase17,360
Jan 10, 2025Ryali SriramA Award300,000
Nov 20, 2024Fischesser RyanA Award25,000

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.