Affiliated Managers Group, Inc. (NYSE: AMG) today announced the completion of its investment in Yacktman Asset Management LP (“Yacktman”). With approximately $17 billion of assets under management, Yacktman is a highly-regarded investment manager specializing in large-cap equities through a unique, value-oriented approach. The firm seeks to make investments in high-quality businesses at low valuations with the goal of generating outperformance over the long term. The firm’s two flagship mutual funds, The Yacktman Fund and The Yacktman Focused Fund, are ranked in the top decile in Morningstar’s Large Value category for the trailing 3-, 5- and 10-year periods, with five-star ratings assigned to both funds. In addition, Yacktman serves a number of institutional investors and high-net-worth individuals through separately managed accounts and sub-advisory mandates. The firm was founded in 1992 and is led by Donald Yacktman, Stephen Yacktman, Jason Subotky and Russell Wilkins. As part of the transaction, all of Yacktman’s senior professionals have agreed to long-term commitments with the firm. In addition, Yacktman’s two mutual funds have become part of the Managers family of funds. The terms of the transaction were not disclosed. About Affiliated Managers Group AMG is a global asset management company with equity investments in leading boutique investment management firms. AMG’s innovative partnership approach allows each Affiliate’s management team to own significant equity in their firm while maintaining operational autonomy. AMG’s strategy is to generate growth through the internal growth of existing Affiliates, as well as through investments in new Affiliates. In addition, AMG provides centralized assistance to its Affiliates in strategic matters, marketing, distribution, product development and operations. As of March 31, 2012, the aggregate assets under management of AMG’s Affiliates were approximately $392 billion (pro forma for announced investments) across a broad range of investment styles, asset classes and distribution channels. For more information, please visit the Company’s website at www.amg.com. 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 close pending investments, 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 SEC. Reference is hereby made to the “Risk Factors” set forth in AMG’s Form 10-K for the year ended December 31, 2011. AMG routinely posts information that may be significant for investors in the Investor Information section of its website, and encourages investors to consult that section regularly. For additional information, please visit www.amg.com .