COMMUNITY FINANCIAL SYSTEM, INC. — Director's Dealing 2021

Feb 26, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COMMUNITY BANK SYSTEM, INC. (CBU)
CIK: 0000723188
Period of Report: 2021-02-25

Reporting Person: SUTARIS JOSEPH E (EVP & Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-02-25	Common Stock	M	3026	$29.79	Acquired	9237.9958	Direct
2021-02-25	Common Stock	F	2112	$73.66	Disposed	7125.9958	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-02-25	Stock Option	$29.79	M	3026	Disposed	2023-03-19	Common Stock (3026)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1883.8873	Indirect

Footnotes

F1: The number of shares reported herein acquired pursuant to Community Bank System, Inc.'s 401(k) Plan and are based on a current plan statement.

F2: The option vested ratably on March 19, 2014, 2015, 2016, 2017 and 2018.