| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Padiyar Kavita | General Counsel & Corp. Sec. | C/O AFFILIATED MANAGERS GROUP, INC., 777 SOUTH FLAGLER DRIVE, WEST PALM BEACH | /s/ Kavita Padiyar | 04 Sep 2025 | 0002017736 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | AMG | Common Stock | Options Exercise | $3,523,025 | +47,731 | +186% | $73.81 | 73,431 | 02 Sep 2025 | Direct | |
| transaction | AMG | Common Stock | Tax liability | $7,127,000 | -30,991 | -42% | $229.97 | 42,440 | 02 Sep 2025 | Direct |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | AMG | Employee Stock Option (Right to Buy) | Options Exercise | $0 | -47,731 | -97% | $0.000000 | 1,354 | 02 Sep 2025 | Common Stock | 47,731 | $73.81 | Direct |