InsiderTrades

Form 4 for AMG AFFILIATED MANAGERS GROUP, INC.

Accepted 2026-08-18 17:03:29 ET · period of report 2026-08-15 · accession 0001004434-26-000101 · 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 2026-08-18 17:03 2026-08-15 AMG Matos Rodriguez Felix V. Dir M - OptEx $0.00 +654 5,023 +15% $0
D 2026-08-18 17:03 2026-08-15 AMG Matos Rodriguez Felix V. Dir M - OptEx $0.00 -654 1,127 -37% $0

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-08-15 M A 654 $0.00 5,023 D — — (F1) Reflects the vesting of previously reported awards. Awards vest 2023-2027.
2 Derivative Stock Units 2026-08-15 M D 654 $0.00 1,127 D — · — to — 654 Common Stock (F1) Reflects the vesting of previously reported awards. Awards vest 2023-2027. (F1) Reflects the vesting of previously reported awards. Awards vest 2023-2027. (F1) Reflects the vesting of previously reported awards. Awards vest 2023-2027.