A. Gillan Myer - 01 Oct 2023 Form 4 Insider Report for COMMUNITY BANK SYSTEM, INC. (CBU)

Role: EVP, Chief Human Resources Off
Signature: /s/ Danielle M. Cima, pursuant to a Confirming Statement executed by Maureen Gillan-Myer
Issuer symbol: CBU
Transactions as of: 01 Oct 2023
Net transactions value: -$7,429
Form type: 4
Filing time: 02 Oct 2023, 15:12:27 UTC
Previous filing: 15 Mar 2023
Next filing: 05 Mar 2024
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	$7,429	-176	-5.9%	$42.21	2,825	01 Oct 2023	Direct	F1
holding	CBU	Common Stock						1,102	01 Oct 2023	By 401(k) Plan

* 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 award.