UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(D) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported) October 30, 2014

Affiliated Managers Group, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Delaware

(State or Other Jurisdiction of Incorporation)

(617) 747-3300

(Registrant’s Telephone Number, Including Area Code)

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

£            Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

£            Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

£            Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

£            Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

ITEM 5.02                                Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On October 30, 2014, Dr. Rita M. Rodriguez notified Affiliated Managers Group, Inc. (the “Company”) of her decision to retire from the Board of Directors of the Company, effective December 31, 2014.  Dr. Rodriguez, who has served on the Board of Directors for 15 years, also serves as chair of the Audit Committee and as a member of the Nominating and Governance Committee.  Following the retirement of Dr. Rodriguez, Dwight D. Churchill, who has been a member of the Company’s Board of Directors and Audit Committee since February 2010, will serve as chair of the Audit Committee.

A copy of the press release announcing Dr. Rodriguez’s retirement is furnished as Exhibit 99.1 hereto.

ITEM 9.01                                Financial Statements and Exhibits.

(d)                                 Exhibits.

* This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, nor shall it be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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EXHIBIT INDEX

* This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, nor shall it be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934.

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Exhibit 99.1

AMG Announces Retirement of Rita M. Rodriguez from its Board of Directors

BOSTON, November 3, 2014 – Affiliated Managers Group, Inc. (NYSE: AMG) today announced that Dr. Rita M. Rodriguez has decided to retire from its Board of Directors, effective December 31, 2014.  Dr. Rodriguez has been a director of AMG since January 2000.

“On behalf of our Board and AMG’s management team, we thank Rita for her outstanding service and longstanding commitment to the Company,” stated Sean M. Healey, Chairman and Chief Executive Officer of AMG.  “Rita has been an extraordinary Board member, and we greatly appreciate the leadership, insight and expertise she has provided over the past 15 years. We wish Rita the very best in her retirement.”

Dr. Rodriguez serves as chair of the Audit Committee and is also a member of the Nominating and Governance Committee.  Following the retirement of Dr. Rodriguez, Dwight D. Churchill, who has been a member of AMG’s Board and Audit Committee since February 2010, will serve as chair of the Audit Committee.

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 September 30, 2014, the aggregate assets under management of AMG’s Affiliates were approximately $617 billion, pro forma for a recent investment, in more than 400 investment products 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 Securities and Exchange Commission.  Reference is hereby made to the “Risk Factors” set forth in the Company’s Form 10-K for the year ended December 31, 2013.

AMG routinely posts information that may be significant for investors in the Investor Relations section of its website, and encourages investors to consult that section regularly.  For additional information, please visit www.amg.com.

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