<SEC-DOCUMENT>0001193125-20-039735-index.html : 20200218
<SEC-HEADER>0001193125-20-039735.hdr.sgml : 20200218
<ACCEPTANCE-DATETIME>20200218090609
ACCESSION NUMBER:		0001193125-20-039735
CONFORMED SUBMISSION TYPE:	425
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20200218
DATE AS OF CHANGE:		20200218

SUBJECT COMPANY:	

	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:		425
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-01829
		FILM NUMBER:		20623748

	BUSINESS ADDRESS:	
		STREET 1:		227 W MONROE STE 3000
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		3126349200

	MAIL ADDRESS:	
		STREET 1:		227 W MONROE STE 3000
		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

FILED BY:		

	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:		425

	BUSINESS ADDRESS:	
		STREET 1:		227 W MONROE STE 3000
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		3126349200

	MAIL ADDRESS:	
		STREET 1:		227 W MONROE STE 3000
		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>
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CENTRAL INDEX KEY:			0000002110
<SERIES>
<SERIES-ID>S000009184
<SERIES-NAME>Columbia Acorn Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000024954
<CLASS-CONTRACT-NAME>Columbia Acorn Fund Class A
<CLASS-CONTRACT-TICKER-SYMBOL>LACAX
</CLASS-CONTRACT>
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<TARGET-DATA>
CENTRAL INDEX KEY:			0000002110
<SERIES>
<SERIES-ID>S000009187
<SERIES-NAME>Columbia Acorn Select
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000024966
<CLASS-CONTRACT-NAME>Columbia Acorn Select Class A
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CENTRAL INDEX KEY:			0000002110
<SERIES>
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<SERIES-NAME>Columbia Acorn Fund
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<CLASS-CONTRACT-ID>C000024956
<CLASS-CONTRACT-NAME>Columbia Acorn Fund Class C
<CLASS-CONTRACT-TICKER-SYMBOL>LIACX
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CENTRAL INDEX KEY:			0000002110
<SERIES>
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<SERIES-NAME>Columbia Acorn Select
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<CLASS-CONTRACT-NAME>Columbia Acorn Select Class C
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<MERGER>
<ACQUIRING-DATA>
CENTRAL INDEX KEY:			0000002110
<SERIES>
<SERIES-ID>S000009184
<SERIES-NAME>Columbia Acorn Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000024957
<CLASS-CONTRACT-NAME>Columbia Acorn Fund Institutional Class
<CLASS-CONTRACT-TICKER-SYMBOL>ACRNX
</CLASS-CONTRACT>
</SERIES>
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<TARGET-DATA>
CENTRAL INDEX KEY:			0000002110
<SERIES>
<SERIES-ID>S000009187
<SERIES-NAME>Columbia Acorn Select
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000024969
<CLASS-CONTRACT-NAME>Columbia Acorn Select Institutional Class
<CLASS-CONTRACT-TICKER-SYMBOL>ACTWX
</CLASS-CONTRACT>
</SERIES>
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<MERGER>
<ACQUIRING-DATA>
CENTRAL INDEX KEY:			0000002110
<SERIES>
<SERIES-ID>S000009184
<SERIES-NAME>Columbia Acorn Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000122735
<CLASS-CONTRACT-NAME>Columbia Acorn Fund Advisor Class
<CLASS-CONTRACT-TICKER-SYMBOL>CEARX
</CLASS-CONTRACT>
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CENTRAL INDEX KEY:			0000002110
<SERIES>
<SERIES-ID>S000009187
<SERIES-NAME>Columbia Acorn Select
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000122743
<CLASS-CONTRACT-NAME>Columbia Acorn Select Advisor Class
<CLASS-CONTRACT-TICKER-SYMBOL>CSSRX
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CENTRAL INDEX KEY:			0000002110
<SERIES>
<SERIES-ID>S000009184
<SERIES-NAME>Columbia Acorn Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000122736
<CLASS-CONTRACT-NAME>Columbia Acorn Fund Institutional 2 Class
<CLASS-CONTRACT-TICKER-SYMBOL>CRBRX
</CLASS-CONTRACT>
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<TARGET-DATA>
CENTRAL INDEX KEY:			0000002110
<SERIES>
<SERIES-ID>S000009187
<SERIES-NAME>Columbia Acorn Select
<CLASS-CONTRACT>
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<CLASS-CONTRACT-NAME>Columbia Acorn Select Institutional 2 Class
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<ACQUIRING-DATA>
CENTRAL INDEX KEY:			0000002110
<SERIES>
<SERIES-ID>S000009184
<SERIES-NAME>Columbia Acorn Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000122737
<CLASS-CONTRACT-NAME>Columbia Acorn Fund Institutional 3 Class
<CLASS-CONTRACT-TICKER-SYMBOL>CRBYX
</CLASS-CONTRACT>
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<TARGET-DATA>
CENTRAL INDEX KEY:			0000002110
<SERIES>
<SERIES-ID>S000009187
<SERIES-NAME>Columbia Acorn Select
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000122745
<CLASS-CONTRACT-NAME>Columbia Acorn Select Institutional 3 Class
<CLASS-CONTRACT-TICKER-SYMBOL>CSLYX
</CLASS-CONTRACT>
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</SEC-HEADER>
<DOCUMENT>
<TYPE>425
<SEQUENCE>1
<FILENAME>d883988d425.htm
<DESCRIPTION>COLUMBIA ACORN TRUST
<TEXT>
Document 1 - file: d883988d425.htm

</DOCUMENT>
</SEC-DOCUMENT>