<SEC-DOCUMENT>0001193125-17-365722-index.html : 20171211
<SEC-HEADER>0001193125-17-365722.hdr.sgml : 20171211
<ACCEPTANCE-DATETIME>20171211102021
ACCESSION NUMBER:		0001193125-17-365722
CONFORMED SUBMISSION TYPE:	40-17G
PUBLIC DOCUMENT COUNT:		18
FILED AS OF DATE:		20171211
DATE AS OF CHANGE:		20171211
EFFECTIVENESS DATE:		20171211

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:		40-17G
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-01829
		FILM NUMBER:		171248677

	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
</SEC-HEADER>
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<DESCRIPTION>COLUMBIA ACORN TRUST
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Document 1 - file: d506715d4017g.htm

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Document 2 - file: g506715page003a.jpg

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Document 3 - file: g506715page003b.jpg

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Document 5 - file: g506715page020.jpg

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Document 15 - file: g506715page034.jpg

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Document 18 - file: g506715stm1b.jpg

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