InsiderTrades

Form 4 for CBU COMMUNITY FINANCIAL SYSTEM, INC.

Accepted 2026-06-11 16:21:14 ET · period of report 2026-06-10 · accession 0000723188-26-000098 · 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
DM 2026-06-11 16:21 2026-06-10 CBU Durkee Deresa Fischer SVP, CAO M - OptEx $46.21 +1,623 6,804 +31% +$75.0K
D 2026-06-11 16:21 2026-06-10 CBU Durkee Deresa Fischer SVP, CAO F - Tax $64.77 -1,326 5,478 -19% -$85.9K
DM 2026-06-11 16:21 2026-06-10 CBU Durkee Deresa Fischer SVP, CAO M - OptEx $0.00 -1,623 1,794 -47% $0

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-06-10 M A 427 $51.64 5,607.60 D — —
2 Common Common Stock 2026-06-10 M A 1,196 $44.27 6,803.60 D — —
3 Common Common Stock 2026-06-10 F D 1,326 $64.77 5,477.60 D — —
4 Derivative Stock Option 2026-06-10 M D 427 $0.00 0 D $51.64 · — to 2030-03-17 427 Common Stock (F2) The option vested ratably on March 17, 2021, 2022, 2023, 2024, and 2025.
5 Derivative Stock Option 2026-06-10 M D 1,196 $0.00 1,794 D $44.27 · — to 2034-03-19 1,196 Common Stock (F3) The option vests ratably on March 19, 2025, 2026, 2027, 2028, and 2029.