<SEC-DOCUMENT>0001145549-23-031099-index.html : 20230525
<SEC-HEADER>0001145549-23-031099.hdr.sgml : 20230525
<ACCEPTANCE-DATETIME>20230525062125
ACCESSION NUMBER:		0001145549-23-031099
CONFORMED SUBMISSION TYPE:	NPORT-P
PUBLIC DOCUMENT COUNT:		5
CONFORMED PERIOD OF REPORT:	20230331
FILED AS OF DATE:		20230525
DATE AS OF CHANGE:		20230525
PERIOD START:           	20231231

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COLUMBIA ACORN TRUST
		CENTRAL INDEX KEY:			0000002110
		IRS NUMBER:				362692100
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		NPORT-P
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-01829
		FILM NUMBER:		23956054

	BUSINESS ADDRESS:	
		STREET 1:		71 S. WACKER DRIVE, SUITE 2500
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		3126349200

	MAIL ADDRESS:	
		STREET 1:		71 S. WACKER DRIVE, SUITE 2500
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	LIBERTY ACORN TRUST
		DATE OF NAME CHANGE:	20010424

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ACORN INVESTMENT TRUST
		DATE OF NAME CHANGE:	19940204

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ACORN FUND INC
		DATE OF NAME CHANGE:	19920703
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000002110
<SERIES-ID>S000009186
<SERIES-NAME>Columbia Acorn USA
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000024962
<CLASS-CONTRACT-NAME>Columbia Acorn USA Class A
<CLASS-CONTRACT-TICKER-SYMBOL>LAUAX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000024964
<CLASS-CONTRACT-NAME>Columbia Acorn USA Class C
<CLASS-CONTRACT-TICKER-SYMBOL>LAUCX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000024965
<CLASS-CONTRACT-NAME>Columbia Acorn USA Institutional Class
<CLASS-CONTRACT-TICKER-SYMBOL>AUSAX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000122740
<CLASS-CONTRACT-NAME>Columbia Acorn USA Advisor Class
<CLASS-CONTRACT-TICKER-SYMBOL>CUSAX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000122741
<CLASS-CONTRACT-NAME>Columbia Acorn USA Institutional 2 Class
<CLASS-CONTRACT-TICKER-SYMBOL>CYSRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000122742
<CLASS-CONTRACT-NAME>Columbia Acorn USA Institutional 3 Class
<CLASS-CONTRACT-TICKER-SYMBOL>CUSYX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>NPORT-P
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>NPORT-EX
<SEQUENCE>2
<FILENAME>nportpoi_acorn.htm
<TEXT>
Document 2 - file: nportpoi_acorn.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>imgcba4d13c1.jpg
<TEXT>
Document 3 - file: imgcba4d13c1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>img6c0b1c4b2.jpg
<TEXT>
Document 4 - file: img6c0b1c4b2.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>imgb895a18e3.jpg
<TEXT>
Document 5 - file: imgb895a18e3.jpg

</DOCUMENT>
</SEC-DOCUMENT>