<SEC-DOCUMENT>0001193125-20-229824-index.html : 20200825
<SEC-HEADER>0001193125-20-229824.hdr.sgml : 20200825
<ACCEPTANCE-DATETIME>20200825153400
ACCESSION NUMBER:		0001193125-20-229824
CONFORMED SUBMISSION TYPE:	POS EX
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20200825
DATE AS OF CHANGE:		20200825
EFFECTIVENESS DATE:		20200825

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:		POS EX
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-236783
		FILM NUMBER:		201132164

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>POS EX
<SEQUENCE>1
<FILENAME>d80634dposex.htm
<DESCRIPTION>COLUMBIA ACORN TRUST
<TEXT>
Document 1 - file: d80634dposex.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(12)
<SEQUENCE>2
<FILENAME>d80634dex9912.htm
<DESCRIPTION>OPINION AND CONSENT OF VEDDER PRICE P.C.
<TEXT>
Document 2 - file: d80634dex9912.htm

</DOCUMENT>
</SEC-DOCUMENT>