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

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Report for the Calendar Year or Quarter Ended:

03-31-2026

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:	1001 U.S. Highway One North
	Suite 702
	Jupiter, FL 33477
Form 13F File Number:	028-04975
CRD Number (if applicable):
SEC File Number (if applicable):

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	05-14-2026
[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
	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

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