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

Role
Director
Signature
/s/ Kavita Padiyar, Attorney-in-Fact
Issuer symbol
AMG
Transactions as of
05 Mar 2026
Net transactions value
$0
Form type
4
Filing time
09 Mar 2026, 17:35:06 UTC
Previous filing
18 Aug 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
STARR LOREN M Director C/O AFFILIATED MANAGERS GROUP, INC., 777 SOUTH FLAGLER DRIVE, WEST PALM BEACH /s/ Kavita Padiyar, Attorney-in-Fact 09 Mar 2026 0001217495

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMG Common Stock Options Exercise +652 +51% $0.000000* 1,937 05 Mar 2026 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction AMG Stock Units Options Exercise -652 -22% $0.000000* 2,362 05 Mar 2026 Common Stock 652 Direct F1, F2
transaction AMG Stock Units Award +503 $0.000000* 503 05 Mar 2026 Common Stock 503 Direct F3
transaction AMG Deferred Stock Units Award +257 $0.000000* 257 05 Mar 2026 Common Stock 257 Direct F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Reflects the vesting of previously reported awards. Awards vest 2025-2028.
F2 Inclusive of previously reported deferred stock units.
F3 Each stock unit represents a right to receive one share of the Company's common stock upon vesting. The stock units vest in full on March 5, 2027.
F4 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.