Exhibit 77D

COLUMBIA FUNDS SERIES TRUST - SEMI-ANNUAL N-SAR REPORT FOR THE PERIOD ENDING
9/30/12

Corporate Bond Portfolio
Mortgage- and Asset-Backed Portfolio

--------------------------------------------------------------------------------

ITEM 77D/77Q1(B) - POLICIES WITH RESPECT TO SECURITIES INVESTMENTS:

On May 4, 2012, Form Type 497, ACCESSION NO. 0001193125-12-210858, a supplement
to the registration statement of Columbia Funds Series Trust on behalf of
Corporate Bond Portfolio 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 Fund's prospectus by deleting the fourth
and fifth paragraphs in the Principal Investment Strategies section of the
prospectus in their entirety and replacing them with the following:

     The Adviser evaluates a number of factors in identifying investment
     opportunities and constructing the Fund's portfolio. The selection of
     individual debt obligations is the primary decision in building the
     portfolio.

     The Adviser evaluates a security based on its potential to generate income
     and/or capital appreciation. The Adviser considers, among other factors,
     the creditworthiness of the issuer of the security and the various features
     of the security, such as its interest rate, yield, maturity, any call
     features and value relative to other securities.

     The Adviser also considers local, national and global economic conditions,
     market conditions, interest rate movements and other relevant factors in
     allocating the Fund's assets among issuers, securities, industry sectors
     and maturities.