<SEC-DOCUMENT>0001193125-23-029902-index.html : 20230522
<SEC-HEADER>0001193125-23-029902.hdr.sgml : 20230522

<ACCEPTANCE-DATETIME>20230209153258

<PRIVATE-TO-PUBLIC>

ACCESSION NUMBER:		0001193125-23-029902

CONFORMED SUBMISSION TYPE:	N-14/A

PUBLIC DOCUMENT COUNT:		4

FILED AS OF DATE:		20230209

DATE AS OF CHANGE:		20230210


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:		N-14/A

		SEC ACT:		1933 Act

		SEC FILE NUMBER:	333-269553

		FILM NUMBER:		23605872



	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>

<MERGER-SERIES-AND-CLASSES-CONTRACTS>

<MERGER>

<ACQUIRING-DATA>

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>

</SERIES>

</ACQUIRING-DATA>

<TARGET-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<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>

</SERIES>

</TARGET-DATA>

</MERGER>

<MERGER>

<ACQUIRING-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000009184

<SERIES-NAME>Columbia Acorn Fund

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000024956

<CLASS-CONTRACT-NAME>Columbia Acorn Fund Class C

<CLASS-CONTRACT-TICKER-SYMBOL>LIACX

</CLASS-CONTRACT>

</SERIES>

</ACQUIRING-DATA>

<TARGET-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000009186

<SERIES-NAME>Columbia Acorn USA

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000024964

<CLASS-CONTRACT-NAME>Columbia Acorn USA Class C

<CLASS-CONTRACT-TICKER-SYMBOL>LAUCX

</CLASS-CONTRACT>

</SERIES>

</TARGET-DATA>

</MERGER>

<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>

</ACQUIRING-DATA>

<TARGET-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000009186

<SERIES-NAME>Columbia Acorn USA

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000024965

<CLASS-CONTRACT-NAME>Columbia Acorn USA Institutional Class

<CLASS-CONTRACT-TICKER-SYMBOL>AUSAX

</CLASS-CONTRACT>

</SERIES>

</TARGET-DATA>

</MERGER>

<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>

</SERIES>

</ACQUIRING-DATA>

<TARGET-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000009186

<SERIES-NAME>Columbia Acorn USA

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000122740

<CLASS-CONTRACT-NAME>Columbia Acorn USA Advisor Class

<CLASS-CONTRACT-TICKER-SYMBOL>CUSAX

</CLASS-CONTRACT>

</SERIES>

</TARGET-DATA>

</MERGER>

<MERGER>

<ACQUIRING-DATA>

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>

</SERIES>

</ACQUIRING-DATA>

<TARGET-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000009186

<SERIES-NAME>Columbia Acorn USA

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000122741

<CLASS-CONTRACT-NAME>Columbia Acorn USA Institutional 2 Class

<CLASS-CONTRACT-TICKER-SYMBOL>CYSRX

</CLASS-CONTRACT>

</SERIES>

</TARGET-DATA>

</MERGER>

<MERGER>

<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>

</SERIES>

</ACQUIRING-DATA>

<TARGET-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000009186

<SERIES-NAME>Columbia Acorn USA

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000122742

<CLASS-CONTRACT-NAME>Columbia Acorn USA Institutional 3 Class

<CLASS-CONTRACT-TICKER-SYMBOL>CUSYX

</CLASS-CONTRACT>

</SERIES>

</TARGET-DATA>

</MERGER>

</MERGER-SERIES-AND-CLASSES-CONTRACTS>

</SERIES-AND-CLASSES-CONTRACTS-DATA>

</SEC-HEADER>

<DOCUMENT>
<TYPE>N-14/A
<SEQUENCE>1
<FILENAME>d438955dn14a.htm
<DESCRIPTION>COLUMBIA ACORN TRUST
<TEXT>
Document 1 - file: d438955dn14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g438955g00s01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g438955g00s01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g438955g00s02.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g438955g00s02.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>COVER
<SEQUENCE>5
<FILENAME>filename5.htm
<TEXT>
Document 5 - file: filename5.htm

</DOCUMENT>
</SEC-DOCUMENT>