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    SEC Form 13F-NT filed by Affiliated Managers Group Inc.

    11/13/25 4:30:04 PM ET
    $AMG
    Investment Managers
    Finance
    Get the next $AMG alert in real time by email
    SEC FORM 13F-NT

    The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
    The reader should not assume that the information is accurate and complete.

    UNITED STATES SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549
    FORM 13F

    FORM 13F COVER PAGE

    OMB APPROVAL
    OMB Number: 3235-0006
    Estimated average burden
    hours per response: 23.8

    Report for the Calendar Year or Quarter Ended: 09-30-2025
    Check here if Amendment    Amendment Number:
    This Amendment (Check only one.):    is a restatement.
       adds new holdings entries.
    Institutional Investment Manager Filing this Report:
    Name: AFFILIATED MANAGERS GROUP, INC.
    Address: 777 SOUTH FLAGLER DRIVE
    SUITE 1401 EAST TOWER
    WEST PALM BEACH, FL  33401
    Form 13F File Number: 028-04975
    CRD Number (if applicable):
    SEC File Number (if applicable): 028-04975

    The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.

    Person Signing this Report on Behalf of Reporting Manager:
    Name: Kavita Padiyar
    Title: General Counsel and Corporate Secretary
    Phone: 800-345-1100
    Signature, Place, and Date of Signing:
    Kavita Padiyar Prides Crossing,  MA 11-13-2025
    [Signature] [City, State] [Date]
    Affiliated Managers Group, Inc. ('AMG') is making this 13F information filing as a majority owner of certain affiliated institutional investment management firms that are subject to applicable 13F filing requirements. AMG expressly disclaims beneficial ownership of all reported securities. AMG does not exercise voting or investment power over any reported security. Each AMG affiliate exercises such power independently of AMG and each other.
    Report Type (Check only one.):
       13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.)
    X 13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).)
       13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).)
    List of Other Managers Reporting for this Manager:
    [If there are no entries in this list, omit this section.]
    Name Form 13F File No. CRD No. (if applicable) SEC File No. (if applicable) CIK
    AMG Funds LLC 028-11395 000153456 801-56365  
    Artemis Investment Management LLP 028-16284 000153039 801-71338  
    Foyston, Gordon, & Payne Inc 028-11858 000121591 801-61491  
    FRONTIER CAPITAL MANAGEMENT CO LLC 028-01185 000106274 801-15724  
    GW&K Investment Management, LLC 028-04145 000121942 801-61559  
    Genesis Investment Management, LLP 028-10955 000130949 801-63018  
    HARDING LOEVNER LP 028-04434 000104543 801-36845  
    MYCIO WEALTH PARTNERS, LLC 028-11968 000134436 801-64053  
    Parnassus Investments, LLC 028-05022 000316904 801-122618  
    RENAISSANCE GROUP LLC 028-04884 000105916 801-50177  
    River Road Asset Management, LLC 028-11487 000134918 801-64175  
    SYSTEMATIC FINANCIAL MANAGEMENT LP 028-05015 000106146 801-48908  
    THIRD AVENUE MANAGEMENT LLC 028-11289 000107545 801-27792  
    TimesSquare Capital Management, LLC 028-11092 000132694 801-63492  
    Tweedy, Browne Co LLC 028-01222 000006857 801-10669  
    Veritas Asset Management LLP 028-14794 000174314 801-89169  
    WELCH & FORBES LLC 028-00262 000115119 801-60532  
    YACKTMAN ASSET MANAGEMENT LP 028-03760 000164420 801-76744  

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