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 21, 1999 AFFILIATED MANAGERS GROUP, INC. ---------------------------------------------------- (Exact name of Registrant as specified in charter) Delaware 001-13459 043218510 - ---------------------------- ----------------------- ------------------- (State or other jurisdiction (Commission file number) (IRS employer of incorporation) identification no.) Two International Place, 23rd Floor, Boston, MA 02110 ------------------------------------------------------------- (Address of principal executive offices) (Zip code) (617) 747-3300 ------------------------------------------------------ (Registrant's telephone number, including area code)

Item 5. Other Events On October 21, 1999 Affiliated Managers Group, Inc. issued a press release in the form attached hereto as Exhibit 99.1, which press release is incorporated herein by reference. Item 7. Financial Statements and Exhibits (c) Exhibits 99.1 Press Release of Affiliated Managers Group, Inc. issued on October 21, 1999.

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. AFFILIATED MANAGERS GROUP, INC. ------------------------------- (Registrant) Date: November 4, 1999 /s/ Darrell W. Crate ------------------------------- DARRELL W. CRATE Senior Vice President, Chief Financial Officer and Treasurer (and also as Principal Financial and Accounting Officer)

EXHIBIT 99.1 [Letterhead of Affiliated Managers Group, Inc.] AMG ANNOUNCES SHARE REPURCHASE PROGRAM BOSTON, MA, October 21, 1999--Affiliated Managers Group, Inc. (NYSE:AMG), an asset management holding company, today reported that its Board of Directors had authorized a share repurchase program pursuant to which AMG could repurchase up to five percent of AMG's issued and outstanding shares of common stock. The purchases would be effected in open market transactions, with the timing of purchases and the amount of stock purchased determined at the discretion of AMG's management. William J. Nutt, AMG's Chairman and CEO, said, "We believe AMG's prospects are excellent - both in terms of our pipeline of potential investments in new Affiliates and the business outlook for our current group of Affiliates. We do not intend to institute a regular repurchase program over the longer term, but at current values, we believe AMG stock represents an exceptional investment opportunity for our company." Mr. Nutt continued, "Through our strong recurring cash flow and capacity under our senior revolver, we have the financial flexibility to take advantage of share repurchase opportunities like this one, as we have done in the past, while continuing to build long-term shareholder value through accretive investments in new Affiliates." AMG addresses the succession and transition issues facing the principals of growing mid-sized investment management firms. The Company's strategy is to generate growth through investments in new Affiliates, as well as through the internal growth of its existing Affiliates. AMG's innovative transaction structure allows individual members of each Affiliate's management to retain or receive significant direct ownership in their firm while maintaining operating autonomy. In addition, AMG provides centralized assistance to its Affiliates in strategic matters, marketing, distribution, product development, and operations. To date, AMG has made investments in 15 Affiliates, including one pending transaction. These Affiliates collectively managed approximately $74 billion in assets at September 30, 1999. - ------------------------------------------------------------------------------- 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, FULFILLMENT OF THE CONDITIONS TO THE CLOSING OF 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, 1998. # # # For more information on Affiliated Managers Group, please visit AMG's web site at www.amg-boston.com