David Christopher Ryan - 14 Aug 2025 Form 4 Insider Report for AFFILIATED MANAGERS GROUP, INC. (AMG)

Reporting relationship: Director
Issuer ticker: AMG
Reported as of: 14 Aug 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 18 Aug 2025, 17:15:04 UTC
Prior SEC filing: 04 Aug 2025
Next SEC filing: 09 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Kavita Padiyar, Attorney-in-Fact

Key filing fact

David Christopher Ryan filed Form 4 for AFFILIATED MANAGERS GROUP, INC. (AMG) on 18 Aug 2025.

Key facts

This page summarizes David Christopher Ryan's Form 4 filing for AFFILIATED MANAGERS GROUP, INC. (AMG).
3 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 18 Aug 2025, 17:15.

Change

Previous filing in this sequence was filed on 04 Aug 2025.
Current net transaction value: $0.

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 0001725101 Primary reporting owner

Ryan David Christopher

Relationship: Director
Address: C/O AFFILIATED MANAGERS GROUP, INC., 777 SOUTH FLAGLER DRIVE, WEST PALM BEACH
Signature: /s/ Kavita Padiyar, Attorney-in-Fact
Signature date: 18 Aug 2025

Reported non-derivative transactions

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

AMG transaction

Common Stock

Options Exercise

Transaction value: $0
Shares: +1,092
Change %: +43%
Price: $0.000000
Shares after: 3,627
Date: 15 Aug 2025
Ownership: Direct
Footnotes: F1

Reported derivative securities

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

AMG transaction Derivative

Deferred Stock Units

Award

Transaction value: $0
Shares: +307
Change %
Price: $0.000000
Shares after: 307
Date: 14 Aug 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 307
Exercise price
Footnotes: F2

AMG transaction Derivative

Stock Units

Options Exercise

Transaction value: $0
Shares: -1,092
Change %: -20%
Price: $0.000000
Shares after: 4,409
Date: 15 Aug 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,092
Exercise price
Footnotes: F1, F3

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Reflects the vesting of previously reported awards. Awards vest 2022-2027.

Footnote F2

Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period. Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company.

Footnote F3

Inclusive of previously reported deferred stock units.