8-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 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) November 2, 2004

Affiliated Managers Group, Inc.
(Exact Name of Registrant as Specified in Its Charter)
Delaware
(State or Other Jurisdiction of Incorporation)
001-13459	04-3218510
(Commission File Number)	(IRS Employer Identification No.)
600 Hale Street Prides Crossing, Massachusetts	01965
(Address of Principal Executive Offices)	(Zip Code)
(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):

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

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

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

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

ITEM 7.01             Regulation FD Disclosure

On November 2, 2004, Affiliated Managers Group, Inc. announced that it has completed its previously announced purchase of an additional 19% interest in Friess Associates, LLC from Friess Associates’ founder and Chairman, Foster Friess, pursuant to the terms of AMG’s original investment in the firm on October 31, 2001.

ITEM 9.01             Financial Statements and Exhibits

(c)Exhibits.

Exhibit No.	Description
99.1*	Press Release issued November 2, 2004.

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

	AFFILIATED MANAGERS GROUP, INC.
Date:  November 2, 2004
	By:	/s/ Darrell W. Crate
		Name:	Darrell W. Crate
		Title:	Chief Financial Officer, Executive Vice President and Treasurer

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EXHIBIT INDEX

Exhibit No.	Description
99.1*	Press Release issued November 2, 2004.

*  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.

EX-99.1

Exhibit 99.1

Contact: Darrell W. Crate
Affiliated Managers Group, Inc.
(617) 747-3300

AMG Completes Purchase of Additional 19% Interest in Friess Associates

Boston, MA, November 2, 2004 – Affiliated Managers Group, Inc. (NYSE: AMG) announced that it has completed its previously announced purchase of an additional 19% interest in Friess Associates, LLC (“Friess Associates”) from Friess Associates’ founder and Chairman, Foster Friess, pursuant to the terms of AMG’s original investment in the firm on October 31, 2001.  AMG now holds a 70% interest in Friess Associates.  The remaining equity ownership of the firm is held by a broad group of Friess Associates professionals.

Friess Associates is the advisor to the highly regarded Brandywine family of no-load mutual funds and also advises separate portfolios for charitable foundations, major corporations and high net worth individuals.  Friess Associates manages growth equity portfolios with a discipline that focuses on companies whose earnings are typically growing by at least 20% per year and whose stocks sell at reasonable price-to-earnings ratios.  Friess Associates’ management team is led by Chief Executive Officer and Chief Investment Officer, Bill D’Alonzo, as well as a deep team of seasoned investment professionals.

Founded in 1993, AMG is an asset management company that acquires and holds majority equity investments in a diverse group of mid-sized investment management firms.  Pro forma for its pending investment in TimesSquare Capital Management and acquisition of the Fremont Funds, AMG’s affiliated investment management firms managed approximately $109 billion in assets as of September 30, 2004.

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, 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, 2003.

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