SEC EDGAR Submission 0001193125-20-065236

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<ACCEPTANCE-DATETIME>20200306171854

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ACCESSION NUMBER:		0001193125-20-065236

CONFORMED SUBMISSION TYPE:	N-14

PUBLIC DOCUMENT COUNT:		11

FILED AS OF DATE:		20200306

DATE AS OF CHANGE:		20200422


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

		SEC ACT:		1933 Act

		SEC FILE NUMBER:	333-236972

		FILM NUMBER:		20695822



	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>S000009187

<SERIES-NAME>Columbia Acorn Select

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000024966

<CLASS-CONTRACT-NAME>Columbia Acorn Select Class A

<CLASS-CONTRACT-TICKER-SYMBOL>LTFAX

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</TARGET-DATA>

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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>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>S000009187

<SERIES-NAME>Columbia Acorn Select

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000024968

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

<CLASS-CONTRACT-TICKER-SYMBOL>LTFCX

</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>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>

</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>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

</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>S000009187

<SERIES-NAME>Columbia Acorn Select

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000122744

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

<CLASS-CONTRACT-TICKER-SYMBOL>CSLRX

</CLASS-CONTRACT>

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</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>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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</TARGET-DATA>

</MERGER>

<MERGER>

<ACQUIRING-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<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>

</SERIES>

</ACQUIRING-DATA>

<TARGET-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000033622

<SERIES-NAME>Columbia Acorn Emerging Markets Fund

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000103328

<CLASS-CONTRACT-NAME>Columbia Acorn Emerging Markets Fund Class A

<CLASS-CONTRACT-TICKER-SYMBOL>CAGAX

</CLASS-CONTRACT>

</SERIES>

</TARGET-DATA>

</MERGER>

<MERGER>

<ACQUIRING-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000009185

<SERIES-NAME>Columbia Acorn International

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000024960

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

<CLASS-CONTRACT-TICKER-SYMBOL>LAICX

</CLASS-CONTRACT>

</SERIES>

</ACQUIRING-DATA>

<TARGET-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000033622

<SERIES-NAME>Columbia Acorn Emerging Markets Fund

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000103329

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

<CLASS-CONTRACT-TICKER-SYMBOL>CGMCX

</CLASS-CONTRACT>

</SERIES>

</TARGET-DATA>

</MERGER>

<MERGER>

<ACQUIRING-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000009185

<SERIES-NAME>Columbia Acorn International

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000024961

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

<CLASS-CONTRACT-TICKER-SYMBOL>ACINX

</CLASS-CONTRACT>

</SERIES>

</ACQUIRING-DATA>

<TARGET-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000033622

<SERIES-NAME>Columbia Acorn Emerging Markets Fund

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000103331

<CLASS-CONTRACT-NAME>Columbia Acorn Emerging Markets Fund Institutional Class

<CLASS-CONTRACT-TICKER-SYMBOL>CEFZX

</CLASS-CONTRACT>

</SERIES>

</TARGET-DATA>

</MERGER>

<MERGER>

<ACQUIRING-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000009185

<SERIES-NAME>Columbia Acorn International

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000097733

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

<CLASS-CONTRACT-TICKER-SYMBOL>CAIRX

</CLASS-CONTRACT>

</SERIES>

</ACQUIRING-DATA>

<TARGET-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000033622

<SERIES-NAME>Columbia Acorn Emerging Markets Fund

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000122754

<CLASS-CONTRACT-NAME>Columbia Acorn Emerging Markets Fund Institutional 2 Class

<CLASS-CONTRACT-TICKER-SYMBOL>CANRX

</CLASS-CONTRACT>

</SERIES>

</TARGET-DATA>

</MERGER>

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<ACQUIRING-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000009185

<SERIES-NAME>Columbia Acorn International

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000122738

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

<CLASS-CONTRACT-TICKER-SYMBOL>CCIRX

</CLASS-CONTRACT>

</SERIES>

</ACQUIRING-DATA>

<TARGET-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000033622

<SERIES-NAME>Columbia Acorn Emerging Markets Fund

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000122753

<CLASS-CONTRACT-NAME>Columbia Acorn Emerging Markets Fund Advisor Class

<CLASS-CONTRACT-TICKER-SYMBOL>CAERX

</CLASS-CONTRACT>

</SERIES>

</TARGET-DATA>

</MERGER>

<MERGER>

<ACQUIRING-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000009185

<SERIES-NAME>Columbia Acorn International

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000122739

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

<CLASS-CONTRACT-TICKER-SYMBOL>CCYIX

</CLASS-CONTRACT>

</SERIES>

</ACQUIRING-DATA>

<TARGET-DATA>

CENTRAL INDEX KEY:			0000002110

<SERIES>

<SERIES-ID>S000033622

<SERIES-NAME>Columbia Acorn Emerging Markets Fund

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000128887

<CLASS-CONTRACT-NAME>Columbia Acorn Emerging Markets Fund Institutional 3 Class

<CLASS-CONTRACT-TICKER-SYMBOL>CPHRX

</CLASS-CONTRACT>

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<DOCUMENT>
<TYPE>N-14
<SEQUENCE>1
<FILENAME>d872284dn14.htm
<DESCRIPTION>COLUMBIA ACORN TRUST
<TEXT>
Document 1 - file: d872284dn14.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(11)
<SEQUENCE>2
<FILENAME>d872284dex9911.htm
<DESCRIPTION>OPINION AND CONSENT OF PERKINS COIE LLP
<TEXT>
Document 2 - file: d872284dex9911.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(14)
<SEQUENCE>3
<FILENAME>d872284dex9914.htm
<DESCRIPTION>CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
<TEXT>
Document 3 - file: d872284dex9914.htm

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<TYPE>GRAPHIC
<SEQUENCE>5
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<TEXT>
Document 5 - file: g872284g0305122506908.jpg

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<SEQUENCE>6
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Document 6 - file: g872284g0305123101264.jpg

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<FILENAME>g872284g18v24.jpg
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<TEXT>
Document 7 - file: g872284g18v24.jpg

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Document 8 - file: g872284g22c32.jpg

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Document 9 - file: g872284g90e89.jpg

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Document 10 - file: g872284g90m50.jpg

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Document 11 - file: g884166g56x79.jpg

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<TYPE>CORRESP
<SEQUENCE>12
<FILENAME>filename12.htm
<TEXT>
Document 12 - file: filename12.htm

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