DAVID LEE JOHNSON - 20 Feb 2026 Form 4 Insider Report for Caribou Biosciences, Inc. (CRBU)

Role
Director
Signature
/s/ Barbara G. McClung, as attorney-in-fact
Issuer symbol
CRBU
Transactions as of
20 Feb 2026
Net transactions value
$0
Form type
4
Filing time
20 Feb 2026, 17:27:42 UTC
Previous filing
06 Feb 2026
Next filing
25 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
JOHNSON DAVID LEE Director C/O CARIBOU BIOSCIENCES, INC., 2929 7TH STREET, SUITE 105, BERKELEY /s/ Barbara G. McClung, as attorney-in-fact 20 Feb 2026 0001733883

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction CRBU Option to purchase Common Stock Award $0 +45,000 $0.000000 45,000 20 Feb 2026 Common Stock 45,000 $1.80 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 One-twelfth of the shares subject to this option will vest on each monthly anniversary of the grant date such that the option will be fully vested on February 20, 2027, subject to the reporting person continuing to provide service to the Issuer through each such vesting date.