<SEC-DOCUMENT>0001193125-15-346513-index.html : 20151019
<SEC-HEADER>0001193125-15-346513.hdr.sgml : 20151019
<ACCEPTANCE-DATETIME>20151019110205
ACCESSION NUMBER:		0001193125-15-346513
CONFORMED SUBMISSION TYPE:	40-17G
PUBLIC DOCUMENT COUNT:		8
FILED AS OF DATE:		20151019
DATE AS OF CHANGE:		20151019
EFFECTIVENESS DATE:		20151019

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:		151163344

	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>
<DOCUMENT>
<TYPE>40-17G
<SEQUENCE>1
<FILENAME>d63507d4017g.htm
<DESCRIPTION>COLUMBIA ACORN TRUST
<TEXT>
Document 1 - file: d63507d4017g.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g63507covltr_pg01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g63507covltr_pg01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g64018ex_cpg03a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g64018ex_cpg03a.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g64018ex_cpg03b.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g64018ex_cpg03b.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g64018ex_cpg03c.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g64018ex_cpg03c.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g64018p82210832_2015x22x1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g64018p82210832_2015x22x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g64018p82210832_2015x23x1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g64018p82210832_2015x23x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g64018p82210832_2015x2x1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g64018p82210832_2015x2x1.jpg

</DOCUMENT>
</SEC-DOCUMENT>