Kerrie D. MacPherson - 17 Mar 2026 Form 4 Insider Report for COMMUNITY FINANCIAL SYSTEM, INC. (CBU)

Reporting relationship: Director
Issuer ticker: CBU
Reported as of: 17 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 18 Mar 2026, 14:53:03 UTC
Prior SEC filing: 22 Sep 2025
Source filing: View source filing
Reporting owner signature: /s/ Danielle M. Cima, pursuant to a Confirming Statement executed by Kerrie D. MacPherson

Key filing fact

Kerrie D. MacPherson filed Form 4 for COMMUNITY FINANCIAL SYSTEM, INC. (CBU) on 18 Mar 2026.

Key facts

This page summarizes Kerrie D. MacPherson's Form 4 filing for COMMUNITY FINANCIAL SYSTEM, INC. (CBU).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 18 Mar 2026, 14:53.

Change

Previous filing in this sequence was filed on 22 Sep 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001794595 Primary reporting owner

MacPherson Kerrie D.

Relationship: Director
Address: C/O COMMUNITY FINANCIAL SYSTEM, INC., 5790 WIDEWATERS PARKWAY, DEWITT
Signature: /s/ Danielle M. Cima, pursuant to a Confirming Statement executed by Kerrie D. MacPherson
Signature date: 18 Mar 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CBU transaction Derivative

Phantom Stock (Deferred Stock Units)

Award

Transaction value
Shares: +1,220
Change %: +19%
Price: $0.000000^*
Shares after: 7,631
Date: 17 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,220
Exercise price
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

The reporting person has received deferred stock units under the Community Bank System, Inc. 2022 Long-Term Incentive Plan, as amended (the "Plan"). Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date.

Footnote F2

Includes 44.5994, 48.3956, 53.5179, and 49.0975 units of phantom stock acquired as dividend equivalents on April 10, 2025, July 10, 2025, October 10, 2025, and January 12, 2026, respectively, under the LTIP.