<SEC-DOCUMENT>0001004434-25-000024-index.html : 20250411
<SEC-HEADER>0001004434-25-000024.hdr.sgml : 20250411
<ACCEPTANCE-DATETIME>20250411164353
ACCESSION NUMBER:		0001004434-25-000024
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20250411
DATE AS OF CHANGE:		20250411

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AFFILIATED MANAGERS GROUP, INC.
		CENTRAL INDEX KEY:			0001004434
		STANDARD INDUSTRIAL CLASSIFICATION:	INVESTMENT ADVICE [6282]
		ORGANIZATION NAME:           	02 Finance
		EIN:				043218510
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13459
		FILM NUMBER:		25832744

	BUSINESS ADDRESS:	
		STREET 1:		777 SOUTH FLAGLER DRIVE
		STREET 2:		SUITE 1401 EAST TOWER
		CITY:			WEST PALM BEACH
		STATE:			FL
		ZIP:			33401
		BUSINESS PHONE:		(800) 345-1100

	MAIL ADDRESS:	
		STREET 1:		777 SOUTH FLAGLER DRIVE
		STREET 2:		SUITE 1401 EAST TOWER
		CITY:			WEST PALM BEACH
		STATE:			FL
		ZIP:			33401

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AFFILIATED MANAGERS GROUP INC
		DATE OF NAME CHANGE:	19970822
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>a2025amgdefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: a2025amgdefa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>affiliatedmanagersgroupincb.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: affiliatedmanagersgroupincb.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>affiliatedmanagersgroupincc.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: affiliatedmanagersgroupincc.jpg

</DOCUMENT>
</SEC-DOCUMENT>