Caribou Biosciences, Inc. — Director's Dealing 2021

Jul 22, 2021

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: Caribou Biosciences, Inc. (CRBU)
CIK: 0001619856
Period of Report: 2021-07-22

Reporting Person: FMR LLC (10% Owner, See Remark 1)

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Series B Preferred Stock	$		Common Stock (770510)		Indirect
Series A-1 Preferred Stock	$		Common Stock (1070427)		Indirect
Series A-1 Preferred Stock	$		Common Stock (17572)		Indirect
Series A-1 Preferred Stock	$		Common Stock (1464775)		Indirect

Footnotes

F1: The Series A-1 and Series B Preferred Stock are convertible on a 1.818-for-1 basis into the number of shares of Common Stock as shown in column 3 at any time at the holder's election, and automatically upon the closing of the Issuer's initial public offering without payment or further consideration, and have no expiration date.