COMMUNITY FINANCIAL SYSTEM, INC. — Director's Dealing 2020

Oct 1, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COMMUNITY BANK SYSTEM, INC. (CBU)
CIK: 0000723188
Period of Report: 2020-09-30

Reporting Person: Bolus Mark J. (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-09-30	Common Stock	M	1210	$27.36	Acquired	79220.483	Direct
2020-09-30	Common Stock	S	1210	$55.00	Disposed	78010.483	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-09-30	Stock Option	$27.36	M	1210	Disposed	2021-01-19	Common Stock (1210)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	4916.852	Indirect
Common Stock	207.633	Indirect
Common Stock	207.633	Indirect
Common Stock	6732.126	Indirect
Common Stock	209.196	Indirect
Common Stock	209.196	Indirect
Common Stock	4916.852	Indirect
Common Stock	4916.852	Indirect
Common Stock	4916.852	Indirect