<SEC-DOCUMENT>0001145549-25-031622-index.html : 20250527
<SEC-HEADER>0001145549-25-031622.hdr.sgml : 20250527
<ACCEPTANCE-DATETIME>20250527090359
ACCESSION NUMBER:		0001145549-25-031622
CONFORMED SUBMISSION TYPE:	NPORT-P
PUBLIC DOCUMENT COUNT:		4
CONFORMED PERIOD OF REPORT:	20250331
FILED AS OF DATE:		20250527
DATE AS OF CHANGE:		20250527
PERIOD START:           	20251231

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COLUMBIA ACORN TRUST
		CENTRAL INDEX KEY:			0000002110
		ORGANIZATION NAME:           	
		EIN:				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:		25984645

	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>S000009185
<SERIES-NAME>Columbia Acorn International
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000024958
<CLASS-CONTRACT-NAME>Columbia Acorn International Class A
<CLASS-CONTRACT-TICKER-SYMBOL>LAIAX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000024961
<CLASS-CONTRACT-NAME>Columbia Acorn International Institutional Class
<CLASS-CONTRACT-TICKER-SYMBOL>ACINX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000097733
<CLASS-CONTRACT-NAME>Columbia Acorn International Institutional 2 Class
<CLASS-CONTRACT-TICKER-SYMBOL>CAIRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000122738
<CLASS-CONTRACT-NAME>Columbia Acorn International Advisor Class
<CLASS-CONTRACT-TICKER-SYMBOL>CCIRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000122739
<CLASS-CONTRACT-NAME>Columbia Acorn International Institutional 3 Class
<CLASS-CONTRACT-TICKER-SYMBOL>CCYIX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000251060
<CLASS-CONTRACT-NAME>Columbia Acorn International Class S
<CLASS-CONTRACT-TICKER-SYMBOL>CCIDX
</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>GRAPHIC
<SEQUENCE>2
<FILENAME>imgdecde0102.jpg
<TEXT>
Document 2 - file: imgdecde0102.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>img292950321.jpg
<TEXT>
Document 3 - file: img292950321.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>NPORT-EX
<SEQUENCE>4
<FILENAME>nportpoi_acorn.htm
<TEXT>
Document 4 - file: nportpoi_acorn.htm

</DOCUMENT>
</SEC-DOCUMENT>