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                                                                August 22, 2006

                         Columbia Young Investor Fund
                        SPECIAL MEETING OF SHAREHOLDERS
                               September 6, 2006

                                  3rd REQUEST

We recently distributed proxy materials relating to a Special Meeting of
Shareholders of the Columbia Young Investor Fund scheduled for September 6,
2006, at 10:00 a.m., EST.

        Your vote for this important meeting has not yet been received.

We encourage you to utilize one of the following options today to record your
vote:

1. By Phone: For automated telephone voting, call 866.241.6192 24 hours a day,
   and follow the recorded instructions. If you would like to speak to a proxy
   agent, please call 866.233.2079. Representatives are available to take your
   vote Monday through Friday between 9 a.m. and 11:00 p.m. and on Saturday
   from 12 p.m. to 6 p.m. EST.

2. By Internet: Visit https://vote.proxy-direct.com and follow the on-screen
   instructions.

3. By Fax: Complete the enclosed proxy card and fax it to us toll-free at
   888.796.9932 before September 6, 2006.

4. By Mail: If you prefer to vote by mail, please complete the proxy card and
   return it in the enclosed postage-paid envelope.

                Remember, your vote counts. Please vote today.

Your vote will help reduce the need for additional solicitation efforts or
costly meeting adjournments. As the Special Meeting approaches, certain
shareholders of each fund may receive a telephone call from a representative of
Computershare Fund Services if their votes have not yet been received.

Thank you for your prompt attention to this matter.

                                                                   16395-R2-REG



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                                                                August 22, 2006

                      Columbia Small Company Equity Fund
                        SPECIAL MEETING OF SHAREHOLDERS
                               September 6, 2006

                                  3rd REQUEST

We recently distributed proxy materials relating to a special meeting of
shareholders of the Columbia Small Company Equity Fund, scheduled for September
6, 2006, at 10:00 a.m., EST.

        Your vote for this important meeting has not yet been received.

We encourage you to utilize one of the following options today to record your
vote:

1. By Phone: You may cast your vote by telephone by calling the toll free
   number listed on the enclosed proxy card and entering the control number
   printed on the card.

2. By Internet: You may cast your vote using the Internet by logging on to the
   Internet address printed on the enclosed proxy card and following the
   instructions on the website.

3. By Mail: If you prefer to vote by mail, please complete the proxy card and
   return it in the enclosed postage-paid envelope.

                Remember, your vote counts. Please vote today.

Your vote will help reduce the need for additional solicitation efforts or
costly meeting adjournments. As the Special Meeting approaches, certain
shareholders of each fund may receive a telephone call from a representative of
Computershare Fund Services if their votes have not yet been received.

Thank you for your prompt attention to this matter.

                                                                   16391-R2-ADP



[GRAPHIC APPEARS HERE]
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                                                                August 22, 2006

                      Columbia Small Company Equity Fund
                        SPECIAL MEETING OF SHAREHOLDERS
                               September 6, 2006

                                  3rd REQUEST

We recently distributed proxy materials relating to a Special Meeting of
Shareholders of the Columbia Small Company Equity Fund scheduled for September
6, 2006, at 10:00 a.m., EST.

        Your vote for this important meeting has not yet been received.

We encourage you to utilize one of the following options today to record your
vote:

1. By Phone: For automated telephone voting, call 866.241.6192 24 hours a day,
   and follow the recorded instructions. If you would like to speak to a proxy
   agent, please call 866.233.2079. Representatives are available to take your
   vote Monday through Friday between 9 a.m. and 11:00 p.m. and on Saturday
   from 12 p.m. to 6 p.m. EST.

2. By Internet: Visit https://vote.proxy-direct.com and follow the on-screen
   instructions.

3. By Fax: Complete the enclosed proxy card and fax it to us toll-free at
   888.796.9932 before September 6, 2006.

4. By Mail: If you prefer to vote by mail, please complete the proxy card and
   return it in the enclosed postage-paid envelope.

                Remember, your vote counts. Please vote today.

Your vote will help reduce the need for additional solicitation efforts or
costly meeting adjournments. As the Special Meeting approaches, certain
shareholders of each fund may receive a telephone call from a representative of
Computershare Fund Services if their votes have not yet been received.

Thank you for your prompt attention to this matter.

                                                                   16391-R2-REG



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                                                                August 22, 2006

                       Columbia Tax-Managed Growth Fund
                          Columbia Growth Stock Fund
                        SPECIAL MEETING OF SHAREHOLDERS
                               September 6, 2006

                                  3rd REQUEST

We recently distributed proxy materials relating to a special meeting of
shareholders of Columbia Tax-Managed Growth Fund and Columbia Growth Stock
Fund, scheduled for September 6, 2006, at 10:00 a.m., EST.

        Your vote for this important meeting has not yet been received.

We encourage you to utilize one of the following options today to record your
vote:

1. By Phone: You may cast your vote by telephone by calling the toll free
   number listed on the enclosed proxy card and entering the control number
   printed on the card.

2. By Internet: You may cast your vote using the Internet by logging on to the
   Internet address printed on the enclosed proxy card and following the
   instructions on the website.

3. By Mail: If you prefer to vote by mail, please complete the proxy card and
   return it in the enclosed postage-paid envelope.

                Remember, your vote counts. Please vote today.

Your vote will help reduce the need for additional solicitation efforts or
costly meeting adjournments. As the Special Meeting approaches, certain
shareholders of each fund may receive a telephone call from a representative of
Computershare Fund Services if their votes have not yet been received.

Thank you for your prompt attention to this matter.

                                                                   16392-R2-ADP



[GRAPHIC APPEARS HERE]
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                                                                August 22, 2006

                       Columbia Tax-Managed Growth Fund
                          Columbia Growth Stock Fund
                        SPECIAL MEETING OF SHAREHOLDERS
                               September 6, 2006

                                  3rd REQUEST

We recently distributed proxy materials relating to a Special Meeting of
Shareholders of the Columbia Tax-Managed Growth Fund and Columbia Growth Stock
Fund scheduled for September 6, 2006, at 10:00 a.m., EST.

        Your vote for this important meeting has not yet been received.

We encourage you to utilize one of the following options today to record your
vote:

1. By Phone: For automated telephone voting, call 866.241.6192 24 hours a day,
   and follow the recorded instructions. If you would like to speak to a proxy
   agent, please call 866.233.2079. Representatives are available to take your
   vote Monday through Friday between 9 a.m. and 11:00 p.m. and on Saturday
   from 12 p.m. to 6 p.m. EST.

2. By Internet: Visit https://vote.proxy-direct.com and follow the on-screen
   instructions.

3. By Fax: Complete the enclosed proxy card and fax it to us toll-free at
   888.796.9932 before September 6, 2006.

4. By Mail: If you prefer to vote by mail, please complete the proxy card and
   return it in the enclosed postage-paid envelope.

                Remember, your vote counts. Please vote today.

Your vote will help reduce the need for additional solicitation efforts or
costly meeting adjournments. As the Special Meeting approaches, certain
shareholders of each fund may receive a telephone call from a representative of
Computershare Fund Services if their votes have not yet been received.

Thank you for your prompt attention to this matter.

                                                                   16392-R2-REG



[GRAPHIC APPEARS HERE]
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                                                                August 22, 2006

                         Columbia Young Investor Fund
                        SPECIAL MEETING OF SHAREHOLDERS
                               September 6, 2006

                                  3rd REQUEST

We recently distributed proxy materials relating to a special meeting of
shareholders of Columbia Young Investor Fund, scheduled for September 6, 2006,
at 10:00 a.m., EST.

        Your vote for this important meeting has not yet been received.

We encourage you to utilize one of the following options today to record your
vote:

1. By Phone: You may cast your vote by telephone by calling the toll free
   number listed on the enclosed proxy card and entering the control number
   printed on the card.

2. By Internet: You may cast your vote using the Internet by logging on to the
   Internet address printed on the enclosed proxy card and following the
   instructions on the website.

3. By Mail: If you prefer to vote by mail, please complete the proxy card and
   return it in the enclosed postage-paid envelope.

                Remember, your vote counts. Please vote today.

Your vote will help reduce the need for additional solicitation efforts or
costly meeting adjournments. As the Special Meeting approaches, certain
shareholders of each fund may receive a telephone call from a representative of
Computershare Fund Services if their votes have not yet been received.

Thank you for your prompt attention to this matter.

                                                                   16395-R2-ADP