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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 TMpd2GvMxvBeePOldN3bNa9IBpZyESb1FmRRJsrMnyDkc19Dw42/dHfhmZ5Fn6Kk
 Aq1ZTgA1i+6nXWNJlGT6Nw==

<SEC-DOCUMENT>9999999997-04-039783.txt : 20041007
<SEC-HEADER>9999999997-04-039783.hdr.sgml : 20041007
<ACCEPTANCE-DATETIME>20041007095025
<PAPER>
ACCESSION NUMBER:		9999999997-04-039783
CONFORMED SUBMISSION TYPE:	40-33
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20041006
DATE AS OF CHANGE:		20041007
EFFECTIVENESS DATE:		20041006

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:		40-33
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-01829
		FILM NUMBER:		04044418

	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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<SEQUENCE>1
<FILENAME>9999999997-04-039783.paper
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This document was generated as part of a paper submission.
Please reference the Document Control Number 04044418 for access to the original document.
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