Form 4 for AMG AFFILIATED MANAGERS GROUP, INC.
Accepted 2025-08-18 00:00:00 ET · period of report 2025-08-14 · accession 0001127602-25-020600 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2025-08-18 | 2025-08-15 | AMG | Alvingham Karen L. | Dir | F - Tax | $218.70 | -84 | 11.9K | -0.7% | -$18.4K |
| D | 2025-08-18 | 2025-08-15 | AMG | Alvingham Karen L. | Dir | M - OptEx | $0.00 | +1,092 | 11.9K | +10% | $0 |
| D | 2025-08-18 | 2025-08-15 | AMG | Alvingham Karen L. | Dir | M - OptEx | $0.00 | -1,092 | 4,313 | -20% | $0 |
| D | 2025-08-18 | 2025-08-14 | AMG | Alvingham Karen L. | Dir | A - Grant | $0.00 | +262 | 262 | New | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2025-08-15 | F | D | 84 | $218.70 | 11,865 | D | — | — | (F2) 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. |
| 2 | Common | Common Stock | 2025-08-15 | M | A | 1,092 | $0.00 | 11,949 | D | — | — | (F1) Reflects the vesting of previously reported awards. Awards vest 2022-2027. |
| 3 | Derivative | Stock Units | 2025-08-15 | M | D | 1,092 | $0.00 | 4,313 | D | — · — to — | 1,092 Common Stock | (F4) Inclusive of previously reported deferred stock units. (F1) Reflects the vesting of previously reported awards. Awards vest 2022-2027. |
| 4 | Derivative | Deferred Stock Units | 2025-08-14 | A | A | 262 | $0.00 | 262 | D | — · — to — | 262 Common Stock | (F3) 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. |