Chicago, December 1, 2006 — Highbury Financial Inc. has finalized the acquisition of substantially all of ABN AMRO’s U.S. mutual funds from ABN AMRO Group. Effective immediately, Aston Asset Management (Aston) is the advisor of 19 no-load mutual funds with total net assets of approximately $5.5 billion.

The mutual funds are now named Aston Funds and the sales and operation teams remain
unchanged. Most of the portfolio management teams are also unaffected. Aston’s primary focus will be on no-load mutual funds and separately managed accounts.

Aston has entered into sub-advisory agreements with several ABN AMRO Asset
Management affiliates who presently manage some of the funds, including ABN AMRO Asset
Management, Inc., Montag & Caldwell, Inc., TAMRO Capital Partners LLC, Veredus Asset
Management LLC and River Road Asset Management LLC. Aston has retained existing subadvisory agreements with Optimum Investment Advisors and MFS, and added new fixed income advisors Taplin, Canida & Habacht and McDonnell Investment Management.
In making the announcement, Stuart D. Bilton, CEO of Aston, stated, “This is an exciting
time for our organization. Our talented subadvisers will remain in place and our sales force will provide national distribution for new and existing products.”

Bilton also added, “We look forward to continuing to provide shareholders with superior
products and service.”

For more information on the funds currently managed by Aston please call 800-597-9704
or visit www.astonasset.com.

To learn more about ABN AMRO Funds or other mutual fund companies, visit our Fund Companies. For particular fund information, visit Fund Selector.