Matthew K. Durkee - 01 Jan 2026 Form 3 Insider Report for COMMUNITY FINANCIAL SYSTEM, INC. (CBU)

Role
SVP, Chief Banking Officer, President, Commercial Banking
Signature
/s/ Danielle M. Cima, pursuant to a Confirming Statement executed by Matthew K. Durkee
Issuer symbol
CBU
Transactions as of
01 Jan 2026
Net transactions value
$0
Form type
3
Filing time
23 Feb 2026, 11:55:11 UTC
Previous filing
20 May 2021
Next filing
04 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Durkee Matthew K SVP, Chief Banking Officer, President, Commercial Banking C/O COMMUNITY FINANCIAL SYSTEM, INC., 5790 WIDEWATERS PARKWAY, DEWITT /s/ Danielle M. Cima, pursuant to a Confirming Statement executed by Matthew K. Durkee 23 Feb 2026 0001707871

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding CBU Common Stock 3,257 01 Jan 2026 Direct
holding CBU Common Stock 9,620 01 Jan 2026 By 401(K) F1

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
holding CBU Stock Option 01 Jan 2026 Common Stock 2,496 $54.06 Direct F2
holding CBU Stock Option 01 Jan 2026 Common Stock 5,451 $44.27 Direct F3
holding CBU Stock Option 01 Jan 2026 Common Stock 4,474 $58.10 Direct F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The number of shares reported herein were acquired pursuant to Community Financial System, Inc.'s 401(k) Plan and are based on a current plan statement.
F2 The options vest ratably on March 14, 2024, 2025, 2026, 2027, and 2028.
F3 The options vest ratably on March 19, 2025, 2026, 2027, 2028, and 2029.
F4 The options vest ratably on March 18, 2026, 2027, 2028, 2029, and 2030.