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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1619856	Caribou Biosciences Inc.	CRBU	Biological Products, (No Disgnostic Substances) (2836)	453728228

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1871155	Ryan Fischesser	C/O Caribou Biosciences, Inc. 2929 7Th Street, Suite 105 Berkeley CA 94710	Vp Of Finance And Controller	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2022-01-11	569	$2.69	102,264	No	4	P	Direct
Common Stock	Acquisiton	2022-01-11	6,818	$4.11	109,082	No	4	P	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Direct
No	4	P	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Option to purchase Common Stock	Disposition	2022-01-11	569	$0.00	569	$2.69
Common Stock	Option to purchase Common Stock	Disposition	2022-01-11	6,818	$0.00	6,818	$4.11

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
6,815		2029-03-18	No	4	X	Direct
20,452		2031-03-29	No	4	X	Direct

Footnotes

These shares were acquired pursuant to the exercise of a stock option, as reported in Table II below.
The exercise price for this stock option was incorrectly reported as $2.68 per share on the reporting person's Form 3 filed on July 23, 2021.
The shares subject to this option have vested or will vest in equal monthly installments until the option is fully vested on January 1, 2023, subject to the reporting person's continued service to the Issuer through the applicable vesting dates.
1/4th of the shares subject to this option vested on January 1, 2022 and an additional 1/48th of the aggregate number of shares subject to the option have vested or will vest on the corresponding day of each month thereafter, subject to the reporting person's continued services to the Issuer through the applicable vesting dates.