| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Alvingham Karen L. | Director | C/O AFFILIATED MANAGERS GROUP, INC., 777 SOUTH FLAGLER DRIVE, WEST PALM BEACH | /s/ Kavita Padiyar, Attorney-in-Fact | 12 Nov 2025 | 0001726148 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | AMG | Common Stock | Options Exercise | $38,993 | +560 | +4.7% | $69.63 | 12,425 | 07 Nov 2025 | Direct | |
| transaction | AMG | Common Stock | Tax liability | $47,185 | -182 | -1.5% | $259.26 | 12,243 | 07 Nov 2025 | Direct |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | AMG | Director Stock Option (Right to Buy) | Options Exercise | $0 | -560 | -100% | $0.000000 | 0 | 07 Nov 2025 | Common Stock | 560 | $69.63 | Direct |