Michael N. Abdo - 04 Mar 2026 Form 4 Insider Report for COMMUNITY FINANCIAL SYSTEM, INC. (CBU)

Reporting relationship: EVP and General Counsel
Issuer ticker: CBU
Reported as of: 04 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 06 Mar 2026, 14:09:18 UTC
Prior SEC filing: 04 Mar 2026
Next SEC filing: 19 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Danielle M. Cima, pursuant to a Confirming Statement executed by Michael N. Abdo

Key filing fact

Michael N. Abdo filed Form 4 for COMMUNITY FINANCIAL SYSTEM, INC. (CBU) on 06 Mar 2026.

Key facts

This page summarizes Michael N. Abdo's Form 4 filing for COMMUNITY FINANCIAL SYSTEM, INC. (CBU).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 06 Mar 2026, 14:09.

Change

Previous filing in this sequence was filed on 04 Mar 2026.
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 0001933852 Primary reporting owner

Abdo Michael N

Relationship: EVP and General Counsel
Address: C/O COMMUNITY FINANCIAL SYSTEM, INC., 333 BUTTERNUT DRIVE, SYRACUSE
Signature: /s/ Danielle M. Cima, pursuant to a Confirming Statement executed by Michael N. Abdo
Signature date: 06 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CBU transaction

Common Stock

Award

Transaction value
Shares: +1,948
Change %: +29%
Price: $0.000000^*
Shares after: 8,717
Date: 04 Mar 2026
Ownership: Direct
Footnotes: F1

CBU transaction

Common Stock

Tax liability

Transaction value
Shares: -707
Change %: -8.1%
Price: $59.87^*
Shares after: 8,010
Date: 04 Mar 2026
Ownership: Direct
Footnotes: F2

CBU holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 2,731
Date: 04 Mar 2026
Ownership: By 401(K)
Footnotes: F3

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

On March 4, 2026, the Compensation Committee approved the vesting of the three-year performance-based restricted stock award, granted to the reporting person in 2023, based on achievement of predetermined performance criteria at the target level. The reporting person received 1,752 shares of common stock under the award and 196.2353 shares of common stock acquired under the dividend reinvestment feature of the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the "Plan").

Footnote F2

Payment of tax liability associated with vesting of performance stock award.

Footnote F3

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