# EDGAR Filing Document

**Accession Number:** 0001004434
**File Stem:** 0001193125-26-245324
**Filing Date:** 2026-5
**Character Count:** 6682
**Document Hash:** c8e9809056e99028d10cf1677d65b53c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-245324.hdr.sgml**: 20260528

**ACCESSION NUMBER**: 0001193125-26-245324

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20260527

**ITEM INFORMATION**: Submission of Matters to a Vote of Security Holders

**FILED AS OF DATE**: 20260528

**DATE AS OF CHANGE**: 20260528

**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:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-13459
- **FILM NUMBER:** 261036706

**BUSINESS ADDRESS:**
- **STREET 1:** 1001 U.S. HIGHWAY ONE NORTH
- **STREET 2:** SUITE 702
- **CITY:** JUPITER
- **STATE:** FL
- **ZIP:** 33477
- **BUSINESS PHONE:** (800) 345-1100

**MAIL ADDRESS:**
- **STREET 1:** 1001 U.S. HIGHWAY ONE NORTH
- **STREET 2:** SUITE 702
- **CITY:** JUPITER
- **STATE:** FL
- **ZIP:** 33477

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AFFILIATED MANAGERS GROUP INC
- **DATE OF NAME CHANGE:** 19970822

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### WASHINGTON, D.C. 20549

### FORM 8-K

#### CURRENT REPORT

#### PURSUANT TO SECTION 13 OR 15(D)

#### OF THE SECURITIES EXCHANGE ACT OF 1934

#### Date of report (Date of earliest event reported): May 27, 2026

## AFFILIATED MANAGERS GROUP, INC.

#### (Exact Name of Registrant as Specified in Its Charter)

#### Delaware

#### (State or Other Jurisdiction

#### of Incorporation)

---

| | |
|:---|:---|
| **001-13459** | **04-3218510** |
| **(Commission**<br> **File Number)** | **(IRS Employer**<br> **Identification No.)** |

---

#### 1001 U.S. Highway One North, Jupiter, Florida 33477

#### (Address of Principal Executive 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** | **Trading**<br> **Symbol(s)** | **Name of each exchange**<br> **on which registered** |
| **Common Stock ($0.01 par value)** | **AMG** | **New York Stock Exchange** |
| **5.875% Junior Subordinated Notes due 2059** | **MGR** | **New York Stock Exchange** |
| **4.750% Junior Subordinated Notes due 2060** | **MGRB** | **New York Stock Exchange** |
| **4.200% Junior Subordinated Notes due 2061** | **MGRD** | **New York Stock Exchange** |
| **6.750% Junior Subordinated Notes due 2064** | **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. ☐

------

---

| | |
|:---|:---|
| **ITEM 5.07** | **Submission of Matters to a Vote of Security Holders.**  |

---

The Annual Meeting of Stockholders of Affiliated Managers Group, Inc. (the "Company") was held on May 27, 2026. At that meeting, the stockholders considered and acted upon the following proposals:

**1. The Election of Directors**. The stockholders elected the following individuals to serve as directors until the 2027 Annual Meeting of Stockholders and until their respective successors are duly elected and qualified. Each nominee was approved by the stockholders by the affirmative vote of at least 97% of the votes cast. The table below sets forth the voting results for each director:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Votes For** | **Votes Against** | **Abstentions** | **Broker Non-Votes** |
| G. Staley Cates | 23034061 | 48281 | 6040 | 1444196 |
|  Marcy Engel | 22963703 | 118433 | 6246 | 1444196 |
|  Annette Franqui | 22541985 | 540482 | 5915 | 1444196 |
|  Jay C. Horgen | 23026810 | 55537 | 6035 | 1444196 |
|  Félix V. Matos Rodríguez | 22789787 | 292357 | 6238 | 1444196 |
|  Tracy P. Palandjian | 22537482 | 544990 | 5910 | 1444196 |
|  Loren M. Starr | 22405508 | 676731 | 6143 | 1444196 |

---

**2. Non-Binding Advisory Vote on Executive Compensation**. The stockholders voted to approve, by a non-binding advisory vote, the compensation of the Company's named executive officers by the affirmative vote of 98% of the votes cast. The table below sets forth the voting results:

---

| | | | |
|:---|:---|:---|:---|
| **Votes For** | **Votes Against** | **Abstentions** | **Broker Non-Votes** |
| 22587936 | 479705 | 20741 | 1444196 |

---

**3. Ratification of the Selection of PricewaterhouseCoopers LLP as the Company's Independent Registered Public Accounting Firm for the Current Fiscal Year**. The stockholders voted to ratify the selection of PricewaterhouseCoopers LLP as the Company's independent registered public accounting firm for the current fiscal year. The proposal was approved by the stockholders by the affirmative vote of 94% of the votes cast. The table below sets forth the voting results:

---

| | | |
|:---|:---|:---|
| **Votes For** | **Votes Against** | **Abstentions** |
| 23035223 | 1491160 | 6195 |

---

------

#### 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: May 28, 2026 | By: | /s/ Kavita Padiyar |
|  | Name: | Kavita Padiyar |
|  | Title: | General Counsel and Corporate Secretary |

---