SECURITIES AND EXCHANGE COMMISSION
                                Washington, D.C. 20549

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                                       FORM 8-K

                                    CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of the 
                           Securities Exchange Act of 1934

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           Date of Report (Date of earliest event reported): March 20, 1998



                           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 2.  Acquisition or Disposition of Assets

     On March 20, 1998, Affiliated Managers Group, Inc. ("AMG") acquired a 
68% interest in Essex Investment Management Company, LLC ("Essex"), 
successor to Essex Investment Management Company, Inc. In the transaction, a 
wholly-owned subsidiary of AMG merged into Essex Investment Company, Inc. 
with AMG paying $69.6 million in a combination of cash and the assumption of 
liabilities (all of which were satisfied at closing), and 1,750,942 shares of 
AMG's newly designated Series C Non-Voting Convertible Stock (the "Series C 
Stock"). Each share of Series C Stock will automatically convert into one 
share of AMG's Common Stock, $.01 par value per share, on March 20, 1999, or 
upon certain extraordinary events. Following the transaction, senior 
executives at Essex own the remaining 32% interest in Essex.

     This transaction will be accounted for under the purchase method of 
accounting. AMG financed the cash portion of the purchase price out of 
borrowings under AMG's existing $300 million revolving credit facility.

     Essex is a Boston-based investment advisor which manages approximately 
$4.6 billion for a variety of institutional and private clients. Founded in 
1976 by Joseph C. McNay, Chairman and Chief Investment Officer, Essex 
specializes in investing in growth equities and fixed income securities 
employing a fundamental research-driven approach. As part of the transaction, 
Mr. McNay, as well as Steven D. Cutler, President, and Steven R. Clark, 
Executive Vice President, entered into ten (10) year employment contracts 
with Essex.

Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits

     (a)  Financial Statements of Businesses Acquired.

     Audited balance sheets of Essex Investment Management Company, Inc. as of 
November 30, 1997 and November 30, 1996 and audited statements of income and 
cash flows for the three years ended November 30, 1997.

     To be filed by amendment on or before June 3, 1998.

     (b)  Pro Forma Financial Statements.

     Pro forma condensed balance sheet as of December 31, 1997, pro forma 
condensed statements of income for the year then ended, and accompanying 
explanatory notes.
               
     To be filed by amendment on or before June 3, 1998.

     (c)  Exhibits.

Number  Description
- ------  -----------

2.7     Agreement and Plan of Reorganization, dated as of January 15, 1998, by
        and among Affiliated Managers Group, Inc., Constitution Merger Sub,
        Inc., Essex Investment Management Company, Inc. and certain
        stockholders of Essex Investment Management Company, Inc. (1)




2.8     Amendment to Agreement and Plan of Reorganization dated March 
        19, 1998, by and among Affiliated Managers Group, Inc., Constitution 
        Merger Sub, Inc., Essex Investment Management Company, Inc. and 
        certain of the stockholders of Essex Investment Management Company, 
        Inc. (1)

10.15   Essex Investment Management Company, LLC Amended and Restated Limited
        Liability Company Agreement dated March 20, 1998, by and among 
        Affiliated Managers Group, Inc. and the members identified therein. 
        (1)

10.16   Form of Employment Agreement. (1)

99.1    Press release, dated January 15, 1998 (filed for informational 
        purposes).

99.2    Press Release, dated March 20, 1998.

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(1) Incorporated by reference to the exhibit of that number in the Company's 
    Annual Report on Form 10-K for the fiscal year ended December 31, 1997.




 
                                     SIGNATURES 

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

                                   AFFILIATED MANAGERS GROUP, INC.

                                   By: /s/ Sean M. Healey
                                      -----------------------------
                                      Name:  Sean M. Healey
                                      Title: Executive Vice President


DATE: April 3, 1998





                                    EXHIBIT INDEX

Number     Description
- ------     -----------
2.7        Agreement and Plan of Reorganization, dated as of January 15, 1998,
           by and among Affiliated Managers Group, Inc., Constitution Merger 
           Sub, Inc., Essex Investment Management Company, Inc. and certain
           stockholders of Essex Investment Management Company, Inc. (1)
         
2.8        Amendment to Agreement and Plan of Reorganization dated March 
           19, 1998, by and among Affiliated Managers Group, Inc., 
           Constitution Merger Sub, Inc., Essex Investment Management Company,
           Inc. and certain of the stockholders of Essex Investment Management
           Company, Inc. (1)
         
10.14      Amended and Restated Limited Liability Company Agreement of Essex
           Investment Management Company, LLC, dated March 20, 1998. (1)
         
10.15      Form of Employment Agreement. (1)

99.1       Press release, dated January 15, 1998 (filed for informational 
           purposes).

99.2       Press Release, dated March 20, 1998.

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(1) Incorporated by reference to the exhibit of that number in the Company's 
    Annual Report on Form 10-K for the fiscal year ended December 31, 1997.