Thomas M. Wojcik - 05 Mar 2026 Form 4 Insider Report for AFFILIATED MANAGERS GROUP, INC. (AMG)

Reporting relationship: President and COO
Issuer ticker: AMG
Reported as of: 05 Mar 2026
Net transaction value: -$2,290,400
SEC form: 4
Accepted by SEC: 09 Mar 2026, 18:26:24 UTC
Prior SEC filing: 09 Sep 2025
Source filing: View source filing
Reporting owner signature: /s/ Kavita Padiyar, Attorney-in-Fact

Key filing fact

Thomas M. Wojcik filed Form 4 for AFFILIATED MANAGERS GROUP, INC. (AMG) on 09 Mar 2026.

Key facts

This page summarizes Thomas M. Wojcik's Form 4 filing for AFFILIATED MANAGERS GROUP, INC. (AMG).
5 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 09 Mar 2026, 18:26.

Change

Previous filing in this sequence was filed on 09 Sep 2025.
Current net transaction value: -$2,290,400.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001776685 Primary reporting owner

Wojcik Thomas M

Relationship: President and COO
Address: C/O AFFILIATED MANAGERS GROUP, INC., 777 SOUTH FLAGLER DRIVE, WEST PALM BEACH
Signature: /s/ Kavita Padiyar, Attorney-in-Fact
Signature date: 09 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AMG transaction

Common Stock

Options Exercise

Transaction value
Shares: +7,272
Change %: +4.6%
Price: $0.000000^*
Shares after: 165,982
Date: 05 Mar 2026
Ownership: Direct
Footnotes: F1

AMG transaction

Common Stock

Award

Transaction value
Shares: +10,619
Change %: +6.4%
Price: $0.000000^*
Shares after: 176,601
Date: 05 Mar 2026
Ownership: Direct
Footnotes: F2

AMG transaction

Common Stock

Tax liability

Transaction value
Shares: -9,136
Change %: -5.2%
Price: $299.18^*
Shares after: 167,465
Date: 05 Mar 2026
Ownership: Direct
Footnotes: F3

AMG transaction

Common Stock

Sale

Transaction value: $2,290,400
Shares: -8,000
Change %: -4.8%
Price: $286.30
Shares after: 159,465
Date: 06 Mar 2026
Ownership: Direct
Footnotes: F4

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

AMG transaction Derivative

Stock Units

Options Exercise

Transaction value
Shares: -7,272
Change %: -43%
Price: $0.000000^*
Shares after: 9,546
Date: 05 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 7,272
Exercise price
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Thomas M. Wojcik is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 4 footnotes

Footnote F1

Reflects the vesting of previously reported awards. As previously disclosed, all of the reporting person's then-outstanding unvested equity awards were cancelled and terminated on March 6, 2026 in connection with the reporting person's termination of employment on such date.

Footnote F2

Award granted in March 2023, which settled following the achievement of performance conditions previously described in the Company's annual meeting proxy statements.

Footnote F3

Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the awards described above.

Footnote F4

The sale reflects the weighted average sales price of the shares sold; the individual transaction prices ranged from $285.89 to $286.69. Specific transaction details will be provided to the SEC upon request.