Columbia Acorn A (Columbia Acorn Tr, Acorn Fd Cl ) fond

The fund invests a majority of its net assets in the common stock of small- and mid-sized companies with market capitalizations generally in the range of market capitalizations in the Russell 2500 Growth Index, the fund's benchmark, (the index) at the time of purchase. It invests the majority of its assets in U.S. companies, but also may invest up to 33% of its total assets in foreign companies in developed markets (for example, Japan, Canada and the United Kingdom) and in emerging markets.