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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
Common Stock	Disposition	2022-10-06	10,000	$10.80	110,366	No	4	S	Direct
Common Stock	Acquisiton	2022-10-06	2,839	$2.69	113,205	No	4	M	Direct
Common Stock	Acquisiton	2022-10-06	2,839	$4.11	116,044	No	4	M	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	S	Direct
No	4	M	Direct
No	4	M	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	2022-10-06	2,839	$0.00	2,839	$2.69
Common Stock	Option to purchase Common Stock	Disposition	2022-10-06	2,839	$0.00	2,839	$4.11

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
1,704		2029-03-18	No	4	M	Direct
15,337		2031-03-29	No	4	M	Direct

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.67 to $10.94, inclusive. The reporting person undertakes to provide to Caribou Biosciences, Inc., any security holder of Caribou Biosciences, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4.
Includes 4,848 shares represented by restricted stock units ("RSUs") that vest in two equal annual installments beginning on August 22, 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, 2020 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 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 until the option is fully vested on January 1, 2025, subject to the reporting person's continued service to the Issuer through the applicable vesting dates.