# EDGAR Filing Document

**Accession Number:** 0000723188
**File Stem:** 0001140361-26-011566
**Filing Date:** 2026-3
**Character Count:** 2455
**Document Hash:** 61d1fe76bc18b4228b615b6c7990248b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-011566.hdr.sgml**: 20260327

**ACCESSION NUMBER**: 0001140361-26-011566

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 4

**FILED AS OF DATE**: 20260327

**DATE AS OF CHANGE**: 20260327

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** COMMUNITY FINANCIAL SYSTEM, INC.
- **CENTRAL INDEX KEY:** 0000723188
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATIONAL COMMERCIAL BANKS [6021]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 161213679
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-13695
- **FILM NUMBER:** 26801014

**BUSINESS ADDRESS:**
- **STREET 1:** 333 BUTTERNUT DRIVE
- **CITY:** SYRACUSE
- **STATE:** NY
- **ZIP:** 13214
- **BUSINESS PHONE:** 8007242262

**MAIL ADDRESS:**
- **STREET 1:** 333 BUTTERNUT DRIVE
- **CITY:** SYRACUSE
- **STATE:** NY
- **ZIP:** 13214

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** COMMUNITY BANK SYSTEM, INC.
- **DATE OF NAME CHANGE:** 20130806

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** COMMUNITY BANK NA, a subsidiary of Community Bank System Inc
- **DATE OF NAME CHANGE:** 20130729

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** COMMUNITY BANK NA, a subsidiary of Community Bank System Inc.
- **DATE OF NAME CHANGE:** 20130726

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### UNITED STATES<br>

### SECURITIES AND EXCHANGE COMMISSION<br>

#### WASHINGTON, D.C. 20549

### SCHEDULE 14A
Proxy Statement Pursuant to Section 14(a) of the<br>

Securities Exchange Act of 1934 (Amendment No.)

#### Filed by the Registrant ☒

#### Filed by a Party other than the Registrant ☐

#### Check the appropriate box:
☐<br> Preliminary Proxy Statement

☐ **Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2))** 

☐ Definitive Proxy Statement

&nbsp;&nbsp;&nbsp;&nbsp;☒ Definitive Additional Materials

☐<br> Soliciting Material Pursuant to §240.14a-12

![](ny20064673x2_logo.jpg)<br>

#### (Name of Registrant as Specified in Its Charter)
**(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)** <br>

#### Payment of Filing Fee (Check all boxes that apply):
☒<br> No fee required.

☐<br> Fee paid previously with preliminary materials.

☐<br> Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

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![](ny20064673x2_nc01.jpg)

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