UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(D) OF THE

~~OF THE~~ SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): ~~August~~November 113, 2025

AFFILIATED MANAGERS GROUP, INC.

(Exact Name of Registrant as Specified in Its Charter)

Delaware

(State or Other Jurisdiction of Incorporation)

001-13459	~~04-3218510~~	04-3218510
(CommissionFile Number)	(IRS EmployerIdentification No.)
(Commission File Number)		(IRS Employer Identification No.)

777 South Flagler Drive, West Palm Beach, Florida 33401

(Address of ~~Principal~~principal ~~Executive~~executive ~~Offices~~offices)

(800) 345-1100

(Registrant’s Telephone Number, Including Area Code)

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):


☐			Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)


☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)


☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))


☐			Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

~~TradingSymbol(s)~~

~~Name of each exchange on which registered~~

Trading Symbol(s)

Name of each exchange on which registered

Common Stock ($0.01 par value)

~~AMG~~

~~New York Stock Exchange~~

AMG

New York Stock Exchange

5.875% Junior Subordinated Notes due 2059

~~MGR~~

~~New York Stock Exchange~~

MGR

New York Stock Exchange

4.750% Junior Subordinated Notes due 2060

~~MGRB~~

~~New York Stock Exchange~~

MGRB

New York Stock Exchange

4.200% Junior Subordinated Notes due 2061

~~MGRD~~

~~New York Stock Exchange~~

MGRD

New York Stock Exchange

6.750% Junior Subordinated Notes due 2064

~~MGRE~~

~~New York Stock Exchange~~

MGRE

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

IfITEM an2.02 ~~emerging~~Results growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of ~~the~~Operations ~~Exchange~~and ~~Act~~Financial Condition. ☐

~~ITEM~~On 5November 3, 2025, Affiliated Managers Group, Inc.02 ~~Departure~~(the of“Company”) ~~Directors~~issued ora ~~Certain~~press ~~Officers;~~release ~~Election~~setting offorth ~~Directors;~~its ~~Appointment~~financial ofand ~~Certain~~operating ~~Officers;~~results ~~Compensatory~~for ~~Arrangements~~the quarter ended September 30, 2025. A copy of ~~Certain~~the ~~Officers~~press release is furnished as Exhibit 99.1 hereto, except for such portions which are filed, as noted below under Item 9.01.

OnITEM ~~August 14, 2025, Affiliated Managers Group, Inc~~8.01 ~~(the~~Other ~~“Company”) announced the appointment of Marcy Engel to its Board of Directors (the “Board”), as an independent director, effective September 30, 2025~~Events.

~~Ms. Engel~~The ~~served~~press onrelease ~~the~~announced board of directors of Sculptor Capital Management, Inc. from June 2018 through its acquisition by Rithm Capital Corp. in 2023, having served as Chairperson of the board from 2021 through 2023. Prior to that, ~~she was~~ the ~~Chief~~Company’s ~~Operating~~Board ~~Officer and General Counsel~~ of ~~Eton~~Directors ~~Park~~authorized ~~Capital~~and ~~Management,~~declared ~~L.P.,~~ a ~~global~~quarterly ~~alternatives~~dividend ~~investment firm (“Eton Park”), where she was responsible for all~~ of ~~the~~$0.01 ~~non-investment~~per ~~aspects~~share of ~~Eton~~common ~~Park’s business. Prior to joining Eton Park in 2005~~stock, ~~Ms. Engel~~payable ~~worked~~November ~~for Citigroup and its predecessor firms~~28, ~~Salomon~~2025 ~~Smith~~to ~~Barney~~stockholders ~~and Salomon Brothers, Inc., where, among other roles, she was Managing Deputy General Counsel~~ of ~~Citigroup’s~~record ~~Global~~as ~~Corporate and Investment Bank and a member~~ of ~~its Management Committee. Ms. Engel holds a B.A. from~~ the ~~University~~close of ~~Michigan~~business ~~and~~on aNovember ~~J.D.~~13, ~~from the University of Pennsylvania Law School~~2025.

Ms. Engel will participate in the Company’s customary director compensation program, as described in the Company’s proxy statement for its most recent annual meeting of stockholders and in the Company’s periodic filings with the Securities and Exchange Commission (“SEC”). In addition, Ms. Engel and the Company will enter into the Company’s standard indemnification agreement for directors and executive officers, a form of which has been previously filed by the Company with the SEC. There is no arrangement or understanding between Ms. Engel or any other person pursuant to which she was elected as a director of the Company, and there are no familial relationships between her and any of the Company’s directors or executive officers. Ms. Engel, including her immediate family members, is not a party, directly or indirectly, to any related person transaction required to be reported pursuant to Item 404(a) of Regulation S-K.

Separately, on August 11, 2025, Dwight D. Churchill notified the Company of his decision to retire from the Board, effective September 30, 2025.

ITEM 7.01 Regulation FD Disclosure.

On August 14, 2025, the Company issued a press release announcing the matters described above, which is furnished as Exhibit 99.1 hereto and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, nor shall it be deemed incorporated by reference into any filing made by the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.


ITEM 9.01			Financial Statements and Exhibits.

(d) Exhibits.

ExhibitNo.		Description
99.1		Press Release issued by the Company on August 14, 2025.
104		Cover Page Interactive Data File (the cover page tags are embedded within the Inline XBRL document).

The financial highlights table set forth on page 1 and the financial tables set forth on pages 3 through 9 in Exhibit 99.1 hereto are “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and shall be deemed incorporated by reference into the filings of the Company under the Securities Act of 1933, as amended. The remaining information in Exhibit 99.1 is being “furnished” to the Securities and Exchange Commission as provided pursuant to General Instruction B.2 of Form 8-K.


			Exhibit No.						Description

			99.1						Earnings Press Release issued by the Company on November 3 , 2025
			104						Cover Page Interactive Data File (the cover page tags are embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

~~AFFILIATED MANAGERS GROUP, INC.~~

AFFILIATED MANAGERS GROUP, INC.

Date: August 14, 2025

By:

/s/ Kavita Padiyar

Date: November 3, 2025

By:

/s/ Kavita Padiyar

~~Name:~~

~~Kavita Padiyar~~

Name:

Kavita Padiyar

~~Title:~~

~~General Counsel and Corporate Secretary~~

Title:

General Counsel and Corporate Secretary

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