Vaccaro John A 4

What Happened John A. Vaccaro, a director of Community Financial System, Inc. (CBU), was granted 1,220 deferred stock units (a derivative award) on March 17, 2026. The units were reported at $0.00 per share (no cash paid) and are the economic equivalent of 1,220 shares of common stock that will be settled in stock at a predetermined future date. This is an award/grant (code A), a form of compensation rather than an open-market purchase or sale.

Key Details

• Transaction date: 2026-03-17; filing date: 2026-03-18 (timely).
• Security: 1,220 deferred/phantom stock units (derivative), price reported $0.00.
• Total immediate cash value reported: $0 (units settle into common stock later).
• Shares owned after transaction: not disclosed on the Form 4 filing.
• Footnote: Units granted are deferred stock units under the 2022 LTIP; each unit equals one share and will be settled in common stock at a predetermined date (see footnote F1).
• Transaction code: A = Award/Grant.

Context Deferred stock units are a common form of director compensation and represent a future right to receive company shares; they do not reflect an immediate buy or sell decision. Because the award converts to stock at a later date, it increases potential future insider exposure but is primarily a routine compensation action rather than a direct market signal.