Exhibit 77D

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Item 77D/77Q1(b) - Policies with Respect to Securities Investments:

On December 10, 2012, Form Type 497, Accession No. 0001193125-12-496220 , a
supplement to the registration statement of Columbia Acorn Trust on behalf of
Columbia Thermostat Fund was filed with the SEC. It is hereby incorporated by
reference as part of the response to these Items 77D and 77Q1(b) of Form N-SAR.
The supplement made material changes to the disclosure in the Principal
Investment Strategies section of the Columbia Thermostat Fund's prospectuses to
make certain changes to the underlying bond funds in which it invests (the
"Portfolio Funds"). Specifically, the investment adviser has removed Columbia
U.S. Treasury Index Fund and added Columbia Short Term Bond Fund at a weighting
of 40% among the bond Portfolio Funds. The investment adviser has also reduced
the weighting of Columbia Intermediate Bond Fund from 50% to 30% among the bond
Portfolio Funds.