Tina M. Albertson - 19 Aug 2024 Form 4 Insider Report for Caribou Biosciences, Inc. (CRBU)

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	+300,000		$0.000000	300,000	19 Aug 2024	Common Stock	300,000	$2.18	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Id	Content
F1	25% of the options will vest upon the one-year anniversary of the grant date, August 19, 2025, and 1/48th will vest monthly thereafter over the 36-month period following the one-year cliff, subject to the reporting person's continued service to the Issuer through the applicable vesting dates.