AFFILIATED MANAGERS GROUP, INC.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities

Exchange Act of 1934 (Amendment No. )

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐Preliminary Proxy Statement

☐Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☒Definitive Proxy Statement

☐Definitive Additional Materials

☐Soliciting Material Pursuant to §240.14a-12

AFFILIATED MANAGERS GROUP, INC.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

☒No fee required

☐Fee paid previously with preliminary materials

☐Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

AFFILIATED MANAGERS GROUP, INC.

1001 U.S. Highway One North

Jupiter, Florida 33477

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

TO BE HELD ON MAY 27, 2026

NOTICE IS HEREBY GIVEN that the 2026 Annual Meeting of Stockholders (the “Annual Meeting”) of Affiliated Managers

Group, Inc. (the “Company”) will be held on May 27, 2026, at 9:00 a.m. Eastern Daylight Time at the Company’s office at 600 Hale

Street, Prides Crossing, Massachusetts 01965, for the following purposes:

1. To elect seven directors of the Company to serve until the 2027 Annual Meeting of Stockholders and until their respective

successors are duly elected and qualified.

2. To approve, by a non-binding advisory vote, the compensation of the Company’s named executive officers.

3. To ratify the selection of PricewaterhouseCoopers LLP as the Company’s independent registered public accounting firm

for the current fiscal year.

4. To consider and act upon any other matters that may properly be brought before the Annual Meeting and at any

adjournments or postponements thereof.

This year, we have again reduced our environmental impact by providing proxy materials to you online pursuant to Securities

and Exchange Commission rules. On or about April 17, 2026, we will mail to our stockholders a Notice of Internet Availability of

Proxy Materials (the “Notice”) containing instructions on how to access the Proxy Statement and our 2025 Annual Report on Form

10-K online. The Notice, which cannot itself be used to vote your shares, also provides instructions on how to vote online and how

to request a paper copy of the proxy materials, if you so desire. Whether you receive the Notice or paper copies of our proxy

materials, the Proxy Statement and 2025 Annual Report on Form 10-K are available to you atwww.proxyvote.com.

The Company’s Board of Directors fixed the close of business on April 6, 2026 as the record date for determining the

stockholders entitled to notice of, and to vote at, the Annual Meeting and at any adjournments or postponements thereof. Your vote

is very important. Please carefully review the Proxy Statement and submit your proxy online, by telephone, or by mail, whether or

not you plan to attend the Annual Meeting. If you hold your shares in street name through a broker, bank, or other nominee, please

follow the instructions you receive from them to vote your shares.

By Order of the Board of Directors.

Kavita Padiyar

General Counsel and Corporate Secretary

Jupiter, Florida

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