<SEC-DOCUMENT>0000315066-21-001645-index.html : 20210729
<SEC-HEADER>0000315066-21-001645.hdr.sgml : 20210729
<ACCEPTANCE-DATETIME>20210729145259
ACCESSION NUMBER:		0000315066-21-001645
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210727
FILED AS OF DATE:		20210729
DATE AS OF CHANGE:		20210729

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FMR LLC
		CENTRAL INDEX KEY:			0000315066
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40631
		FILM NUMBER:		211126751

	BUSINESS ADDRESS:	
		STREET 1:		245 SUMMER STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02210
		BUSINESS PHONE:		6175706339

	MAIL ADDRESS:	
		STREET 1:		245 SUMMER STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02210

	FORMER NAME:	
		FORMER CONFORMED NAME:	FMR CORP
		DATE OF NAME CHANGE:	19920717

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Caribou Biosciences, Inc.
		CENTRAL INDEX KEY:			0001619856
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				453728228
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2929 7TH STREET, SUITE 105
		CITY:			BERKELEY
		STATE:			CA
		ZIP:			94710
		BUSINESS PHONE:		510-982-6030

	MAIL ADDRESS:	
		STREET 1:		2929 7TH STREET, SUITE 105
		CITY:			BERKELEY
		STATE:			CA
		ZIP:			94710
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
</SEC-DOCUMENT>