a497.htm

-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, N2SSZY19VScWcLC2wwNPsLc7CkDk8l0kwOQruPL1RVQcwFy44dAK3Bva6tkc1Rot +GnqpOnPiTQsqdnJDwqchQ== 0000898432-10-001297.txt : 20101001 0000898432-10-001297.hdr.sgml : 20101001 20101001094049 ACCESSION NUMBER: 0000898432-10-001297 CONFORMED SUBMISSION TYPE: 497 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20101001 DATE AS OF CHANGE: 20101001 EFFECTIVENESS DATE: 20101001 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: 497 SEC ACT: 1933 Act SEC FILE NUMBER: 002-34223 FILM NUMBER: 101100839 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

0000002110 S000009184 Columbia Acorn Fund

C000094632 Columbia Acorn Fund Class I

0000002110 S000009185 Columbia Acorn International

C000094633 Columbia Acorn International Class I

0000002110 S000009186 Columbia Acorn USA

C000094634 Columbia Acorn USA Class I

0000002110 S000009187 Columbia Acorn Select

C000094635 Columbia Acorn Select Class I

0000002110 S000009188 Columbia Acorn International Select

C000094636 Columbia Acorn International Select Class I

497 1 a497.htm a497.htm

COLUMBIA ACORN TRUST

227 W. MONROE STREET, SUITE 3000

CHICAGO, IL 60602

October 1, 2010

BY EDGAR

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Ladies and Gentlemen:

Columbia Acorn Trust

Columbia Acorn Fund

Columbia Acorn International

Columbia Acorn USA

Columbia Acorn Select

Columbia Acorn International Select

1933 Act Registration No. 002-34223

1940 Act Registration No. 811-01829

In accordance with Rule 497(j) of Regulation C under the Securities Act of 1933, Columbia Acorn Trust (the “Trust”) certifies that:

a.

the forms of prospectuses and statement of additional information for the Class I shares of Columbia Acorn Fund, Columbia Acorn International, Columbia Acorn USA, Columbia Acorn Select and Columbia Acorn International Select, each a series of the Trust, that would have been filed under paragraph (c) of Rule 497 would not have differed from that contained in the most recent post-effective amendment to the Trust’s registration statement on Form N-1A; and

b.

the text of the most recent post-effective amendment to the Trust’s registration statement was filed with the Commission via EDGAR on September 27, 2010.

Very truly yours,

COLUMBIA ACORN TRUST

By:	/s/ Bruce H. Lauer
	Bruce H. Lauer, Vice President, Secretary and Treasurer

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