0001193125-15-335330.txt : 20151001 0001193125-15-335330.hdr.sgml : 20151001 20151001161659 ACCESSION NUMBER: 0001193125-15-335330 CONFORMED SUBMISSION TYPE: 497K PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20151001 DATE AS OF CHANGE: 20151001 EFFECTIVENESS DATE: 20151001 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: 497K SEC ACT: 1933 Act SEC FILE NUMBER: 002-34223 FILM NUMBER: 151137211 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 C000094632 Columbia Acorn Fund Class I CANIX C000122735 Columbia Acorn Fund Class R4 CEARX C000122736 Columbia Acorn Fund Class R5 CRBRX C000122737 Columbia Acorn Fund Class Y CRBYX 497K 1 d72934d497k.htm COLUMBIA ACORN TRUST Columbia Acorn Trust

Supplement dated October 1, 2015

to the Prospectus and Summary Prospectus dated May 1, 2015,

as supplemented May 1, 2015, for the following Fund:

COLUMBIA ACORN TRUST

Columbia Acorn® Fund

Effective October 1, 2015, as anticipated on May 1, 2015, Robert A. Mohn has stepped down from his portfolio management role with Columbia Acorn Fund and from his roles as Domestic Chief Investment Officer of Columbia Wanger Asset Management, LLC (“CWAM”) and Vice President of Columbia Acorn Trust (the “Trust”). P. Zachary Egan, Fritz Kaegi and David L. Frank will continue in their current portfolio management roles with the Fund.

Accordingly, the Prospectus and Summary Prospectus for the Fund are hereby supplemented immediately by removing all references to Robert A. Mohn that appear under the headings Summary of the Fund – Fund Management and More Information About the Fund – Primary Service Providers – Portfolio Managers.

The Prospectus and Summary Prospectus for the Fund are also hereby supplemented immediately to reflect that and P. Zachary Egan, President of CWAM and trustee of the Trust, and formerly the International Chief Investment Officer of CWAM, has become Chief Investment Officer of CWAM.

Shareholders should retain this Supplement for future reference.

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