Maureen Gillan-Myer - 03 Mar 2025 Form 4 Insider Report for COMMUNITY FINANCIAL SYSTEM, INC. (CBU)

Role: EVP, Chief Admin & HR Officer
Signature: /s/ Danielle M. Cima, pursuant to a Confirming Statement executed by Maureen Gillan-Myer
Issuer symbol: CBU
Transactions as of: 03 Mar 2025
Transactions value $: -$28,101
Form type: 4
Filing time: 04 Mar 2025, 12:43:03 UTC
Previous filing: 03 Oct 2024
Next filing: 11 Mar 2025
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CBU	Common Stock	Tax liability	-$28.1K	-444	-11.62%	$63.29	3.38K	03 Mar 2025	Direct	F1
holding	CBU	Common Stock						2.69K	03 Mar 2025	By 401(k) Plan	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Payment of tax liability associated with vesting of restricted stock awards.
F2	The number of shares reported herein acquired pursuant to Community Financial System, Inc.'s 401(k) Plan and are based on a current plan statement.