-----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, DRYfVfr4O7hPVtl2rivjfAkEZ8Un+vlfvUE6ds6VLAjo/wMsQi7oS1dlbETMzt4j BGWF3tcJ6JhriTGTkJEqgA== 0000898432-09-001211.txt : 20090930 0000898432-09-001211.hdr.sgml : 20090930 20090930094406 ACCESSION NUMBER: 0000898432-09-001211 CONFORMED SUBMISSION TYPE: 497 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20090930 DATE AS OF CHANGE: 20090930 EFFECTIVENESS DATE: 20090930 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: 091094509 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 C000024954 Columbia Acorn Fund Class A LACAX C000024955 Columbia Acorn Fund Class B LACBX C000024956 Columbia Acorn Fund Class C LIACX C000024957 Columbia Acorn Fund Class Z ACRNX 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 C000024961 Columbia Acorn International Class Z ACINX 0000002110 S000009186 Columbia Acorn USA C000024962 Columbia Acorn USA Class A LAUAX C000024963 Columbia Acorn USA Class B LAUBX C000024964 Columbia Acorn USA Class C LAUCX C000024965 Columbia Acorn USA Class Z AUSAX 0000002110 S000009187 Columbia Acorn Select C000024966 Columbia Acorn Select Class A LTFAX C000024967 Columbia Acorn Select Class B LTFBX C000024968 Columbia Acorn Select Class C LTFCX C000024969 Columbia Acorn Select Class Z ACTWX 0000002110 S000009188 Columbia Acorn International Select C000024970 Columbia Acorn International Select Class A LAFAX C000024971 Columbia Acorn International Select Class B LFFBX C000024972 Columbia Acorn International Select Class C LFFCX C000024973 Columbia Acorn International Select Class Z ACFFX 0000002110 S000009189 Columbia Thermostat Fund C000024974 Columbia Thermostat Fund Class A CTFAX C000024975 Columbia Thermostat Fund Class B CTFBX C000024976 Columbia Thermostat Fund Class C CTFDX C000024977 Columbia Thermostat Fund Class Z COTZX 497 1 columbiaacorntrust_497.htm

 

COLUMBIA ACORN TRUST

ColumbiaSM Acorn® Fund

ColumbiaSM Acorn International®

ColumbiaSM Acorn USA®

ColumbiaSM Acorn International Select®

ColumbiaSM Acorn Select®

ColumbiaSM Thermostat Fund®

(Each a “Fund” and together the “Funds”)

Supplement dated September 30, 2009 to the Prospectuses
and Statement of Additional Information dated May 1, 2009

On September 29, 2009, Bank of America Corporation, the indirect parent company of Columbia Wanger Asset Management, L.P. (the “Advisor”), entered into an agreement to sell a portion of the asset management business of Columbia Management Group, LLC to Ameriprise Financial, Inc.  The transaction (“Transaction”) includes a sale of the Advisor.  The Transaction is subject to certain approvals and other conditions to closing, and is currently expected to close in the spring of 2010.
 

Under the Investment Company Act of 1940, the closing of the Transaction will cause each Fund’s current investment advisory agreement with the Advisor to terminate. In connection with the Transaction, the Board of Trustees of the Funds (the “Board”) will be asked to consider and approve a new investment advisory agreement with the Advisor covering each Fund. If approved by the Board, each Fund’s new investment advisory agreement with the Advisor will be submitted to the shareholders of such Fund for their approval.

 

Shareholders should retain this Supplement for future reference.

 
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