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    Amendment: SEC Form SCHEDULE 13G/A filed by Affiliated Managers Group Inc.

    11/7/25 12:16:29 PM ET
    $AMG
    Investment Managers
    Finance
    Get the next $AMG alert in real time by email



    SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549


    SCHEDULE 13G


    UNDER THE SECURITIES EXCHANGE ACT OF 1934
    (Amendment No. 6)


    AFFILIATED MANAGERS GROUP, INC.

    (Name of Issuer)


    Common Stock

    (Title of Class of Securities)


    008252108

    (CUSIP Number)


    09/30/2025

    (Date of Event Which Requires Filing of this Statement)


    Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
    Checkbox checked   Rule 13d-1(b)
    Checkbox not checked   Rule 13d-1(c)
    Checkbox not checked   Rule 13d-1(d)






    SCHEDULE 13G

    CUSIP No.
    008252108


    1Names of Reporting Persons

    Morgan Stanley
    2Check the appropriate box if a member of a Group (see instructions)

    Checkbox not checked  (a)
    Checkbox not checked  (b)
    3Sec Use Only
    4Citizenship or Place of Organization

    DELAWARE
    Number of Shares Beneficially Owned by Each Reporting Person With:
    5Sole Voting Power

    0.00
    6Shared Voting Power

    1,796,796.00
    7Sole Dispositive Power

    0.00
    8Shared Dispositive Power

    1,907,109.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    1,983,387.00
    10Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

    Checkbox not checked
    11Percent of class represented by amount in row (9)

    7.0 %
    12Type of Reporting Person (See Instructions)

    HC, CO


    SCHEDULE 13G

    CUSIP No.
    008252108


    1Names of Reporting Persons

    Atlanta Capital Management Company, LLC
    2Check the appropriate box if a member of a Group (see instructions)

    Checkbox not checked  (a)
    Checkbox not checked  (b)
    3Sec Use Only
    4Citizenship or Place of Organization

    DELAWARE
    Number of Shares Beneficially Owned by Each Reporting Person With:
    5Sole Voting Power

    0.00
    6Shared Voting Power

    1,608,717.00
    7Sole Dispositive Power

    0.00
    8Shared Dispositive Power

    1,707,951.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    1,778,903.00
    10Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

    Checkbox not checked
    11Percent of class represented by amount in row (9)

    6.3 %
    12Type of Reporting Person (See Instructions)

    IA, CO


    SCHEDULE 13G

    CUSIP No.
    008252108


    1Names of Reporting Persons

    Eaton Vance Atlanta Capital SMID-Cap Fund
    2Check the appropriate box if a member of a Group (see instructions)

    Checkbox not checked  (a)
    Checkbox not checked  (b)
    3Sec Use Only
    4Citizenship or Place of Organization

    MASSACHUSETTS
    Number of Shares Beneficially Owned by Each Reporting Person With:
    5Sole Voting Power

    0.00
    6Shared Voting Power

    1,276,051.00
    7Sole Dispositive Power

    0.00
    8Shared Dispositive Power

    1,276,051.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    1,276,051.00
    10Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

    Checkbox not checked
    11Percent of class represented by amount in row (9)

    4.5 %
    12Type of Reporting Person (See Instructions)

    IV

    Comment for Type of Reporting Person:  As of the date hereof, Eaton Vance Atlanta Capital SMID-Cap Fund has ceased to be the beneficial owner of more than five percent of the class of securities.


    SCHEDULE 13G

    Item 1. 
    (a)Name of issuer:

    AFFILIATED MANAGERS GROUP, INC.
    (b)Address of issuer's principal executive offices:

    777 SOUTH FLAGLER DRIVE, SUITE 1401 EAST TOWER, WEST PALM BEACH, FL, 33401
    Item 2. 
    (a)Name of person filing:

    1: Morgan Stanley 2: Atlanta Capital Management Company, LLC 3: Eaton Vance Atlanta Capital SMID-Cap Fund
    (b)Address or principal business office or, if none, residence:

    1: 1585 Broadway, New York, NY 10036 ;2: 1075 Peachtree Street, Suite 2100, Atlanta, GA 30309 ;3: One Post Office Square, Boston, MA 02109
    (c)Citizenship:

    1: Delaware 2: Delaware 3: Massachusetts
    (d)Title of class of securities:

    Common Stock
    (e)CUSIP No.:

    008252108
    Item 3.If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
    (a)Checkbox not checked   Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
    (b)Checkbox not checked   Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
    (c)Checkbox not checked   Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
    (d)Checkbox checked   Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
    (e)Checkbox checked   An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
    (f)Checkbox not checked   An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
    (g)Checkbox checked   A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
    (h)Checkbox not checked   A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
    (i)Checkbox not checked   A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
    (j)Checkbox not checked   A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
           please specify the type of institution:
    (k)Checkbox not checked   Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
     
    Item 4.Ownership
    (a)Amount beneficially owned:

    See the response(s) to Item 9 on the attached cover page(s).
    (b)Percent of class:

    7.0  %
    (c)Number of shares as to which the person has:
     (i) Sole power to vote or to direct the vote:

    See the response(s) to Item 5 on the attached cover page(s).

     (ii) Shared power to vote or to direct the vote:

    See the response(s) to Item 6 on the attached cover page(s).

     (iii) Sole power to dispose or to direct the disposition of:

    See the response(s) to Item 7 on the attached cover page(s).

     (iv) Shared power to dispose or to direct the disposition of:

    See the response(s) to Item 8 on the attached cover page(s).

    Item 5.Ownership of 5 Percent or Less of a Class.
     
    Checkbox checked    Ownership of 5 percent or less of a class
    Item 6.Ownership of more than 5 Percent on Behalf of Another Person.
     
    Not Applicable
    Item 7.Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
     
    If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.


    See Exhibit 99.2
    Item 8.Identification and Classification of Members of the Group.
     
    Not Applicable
    Item 9.Notice of Dissolution of Group.
     
    Not Applicable

    Item 10.Certifications:
     
    By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. * In Accordance with the Securities and Exchange Commission Release No. 34-39538 (January 12, 1998) (the "Release"), this filing reflects the securities beneficially owned, or that may be deemed to be beneficially owned, by certain operating units (collectively, the "MS Reporting Units") of Morgan Stanley and its subsidiaries and affiliates (collectively, "MS"). This filing does not reflect securities, if any, beneficially owned by any operating units of MS whose ownership of securities is disaggregated from that of the MS Reporting Units in accordance with the Release.

        SIGNATURE 
     
    After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

     
    Morgan Stanley
     
    Signature:Christopher O'Hara
    Name/Title:Authorized Signatory, Morgan Stanley
    Date:11/07/2025
     
    Atlanta Capital Management Company, LLC
     
    Signature:Kelly Williams
    Name/Title:Authorized Signatory, Atlanta Capital Management Company, LLC
    Date:11/07/2025
     
    Eaton Vance Atlanta Capital SMID-Cap Fund
     
    Signature:Kelly Williams
    Name/Title:Authorized Signatory, Eaton Vance Atlanta Capital SMID-Cap Fund
    Date:11/07/2025
    Exhibit Information

    EXHIBIT NO. EXHIBITS ------------------ ------------------------------------ 99.1 Joint Filing Agreement 99.2 Item 7 Information * Attention. Intentional misstatements or omissions of fact constitute federal criminal violations (see 18 U.S.C. 1001).

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