0001193125-11-266414.txt : 20111007 0001193125-11-266414.hdr.sgml : 20111007 20111007105545 ACCESSION NUMBER: 0001193125-11-266414 CONFORMED SUBMISSION TYPE: 497 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20111007 DATE AS OF CHANGE: 20111007 EFFECTIVENESS DATE: 20111007 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: 111131151 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 S000009185 Columbia Acorn International C000024958 Columbia Acorn International Class A LAIAX C000024959 Columbia Acorn International Class B LIABX C000024960 Columbia Acorn International Class C LAICX C000094633 Columbia Acorn International Class I CARIX C000097732 Columbia Acorn International Class R CACRX C000097733 Columbia Acorn International Class R5 497 1 d240127d497.htm COLUMBIA ACORN TRUST Columbia Acorn Trust

COLUMBIA ACORN TRUST

ColumbiaSM Acorn International®

(the “Fund”)

Supplement dated October 7, 2011 to

the Prospectuses for Class A, Class B, Class C, Class I, Class R and Class R5 Shares of the Fund and

the Statement of Additional Information for the Fund,

each dated May 1, 2011

On August 15, 2011, Class R and Class R5 shares of the Fund commenced operations in connection with the completed merger of two series of RiverSource International Managers Series, Inc. into the Fund (the “Reorganization”). Effective immediately, the prospectuses for Class A, Class B, Class C, Class R and Class R5 shares of the Fund and the Statement of Additional Information for the Fund, each dated May 1, 2011, are hereby supplemented to reflect that, in connection with the Reorganization:

 

  1. Class R and Class R5 shares of the Fund commenced operations on August 15, 2011; and

 

  2. Effective August 12, 2011, Columbia Management Investment Services Corp., the Fund’s transfer agent, has contractually agreed, through August 14, 2013, to waive a portion of total annual Fund operating expenses attributable to transfer agency fees incurred by Class A shares, Class B shares and Class C shares. Pursuant to this agreement, total annual Fund operating expenses will be reduced by 0.04% for Class A shares, 0.03% for Class B shares and 0.02% for Class C shares.

Shareholders should retain this Supplement for future reference.

C-1566-3 A (10/11)