Michele Sullivan - 18 Sep 2025 Form 4 Insider Report for COMMUNITY FINANCIAL SYSTEM, INC. (CBU)

Role
Director
Signature
/s/ Danielle M. Cima, pursuant to Confirming Statement executed by Michele Sullivan
Issuer symbol
CBU
Transactions as of
18 Sep 2025
Transactions value $
$24,875
Form type
4
Filing time
22 Sep 2025, 11:36:42 UTC
Previous filing
24 Jun 2025
Next filing
19 Dec 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Sullivan Michele Director C/O COMMUNITY FINANCIAL SYSTEM, INC., 5790 WIDEWATERS PARKWAY, DEWITT /s/ Danielle M. Cima, pursuant to Confirming Statement executed by Michele Sullivan 22 Sep 2025 0002009605

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction CBU Deferred Stock (Deferred Compensation) Award $24.9K +416 +18.89% $59.75 2.62K 18 Sep 2025 Common Stock 416 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each unit of phantom stock is the economic equivalent of one share of Community Financial System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Financial System, Inc. common stock at future dates selected by the reporting person.