497 1 d455095d497.htm COLUMBIA ACORN TRUST Columbia Acorn Trust

The interactive data file included as an exhibit to this filing relates to the supplement to the prospectus for Columbia Thermostat Fund filed pursuant to Rule 497(e) under the Securities Act of 1933, as amended, on December 10, 2012 (Accession No. 0001193125-12-496220), which is incorporated herein by reference.