AMG Calls Outstanding Floating Rate Convertible Securities.

BOSTON -- Affiliated Managers Group, Inc. (NYSE: AMG) will redeem all of its outstanding floating rate senior convertible securities due 2033 ("COBRAs") on February 25, 2008. In lieu of redemption, holders of the COBRAs may elect to convert their COBRAs at any time before the close of business on February 21, 2008 in accordance with conversion provisions of the Indenture dated February 25, 2003 governing the COBRAs.

AMG is an asset management company that acquires and holds equity investments in a diverse group of boutique investment management firms. Pro forma for a pending investment, AMG's affiliated investment management firms managed approximately $283 billion in assets as of December 31, 2007.

Certain matters discussed in this press release may constitute forward-looking statements within the meaning of the federal securities laws. Actual results and the timing of certain events could differ materially from those projected in or contemplated by the forward-looking statements due to a number of factors, including changes in the securities or financial markets or in general economic conditions, the availability of equity and debt financing, competition for acquisitions of interests in investment management firms, the ability to complete pending acquisitions, the investment performance of our Affiliates and their ability to effectively market their investment strategies, and other risks detailed from time to time in AMG's filings with the Securities and Exchange Commission. Reference is hereby made to the "Cautionary Statements" set forth in the Company's Form 10-K for the year ended December 31, 2006.

For more information on Affiliated Managers Group, Inc., please visit AMG's Web site at www.amg.com.