Form4insider filings, from the source

Company · CIK 0000723188 · SIC 6021 — National Commercial Banks · NYSE

COMMUNITY FINANCIAL SYSTEM, INC. · CBU

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $75k · 3sales $0 · 0net $75k
$10k$10k$100k$100k$1M$1MbuyssalesJun 28Jul 13Jul 28Aug 13Aug 28Sep 13Sep 28

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 9, 2026 PForm 4 →Sep 10, 3:57 pm EDTSavneet SinghDirector400$62.47$24,988418+2,222%
Aug 27, 2026 PForm 4 →Aug 28, 4:26 pm EDTJohn A VaccaroDirector317$63.11$20,006492+181%
Aug 24, 2026 PForm 4 →Aug 26, 12:07 pm EDTBrenda M HallDirector476$63.59$30,271515+1,221%

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 17, 2026 AForm 4 →Sep 18, 9:33 am EDTJohn A VaccaroDirector347$62.77$21,750984—
Sep 17, 2026 AForm 4 →Sep 18, 9:24 am EDTMichele SullivanDirector396$62.77$24,8754,381—