Company: CCNE
Filing Date: 2025-01-10
Form Type: 425
Source: 0001193125-25-004105
Chunk: 124

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-01-10
Form: 425
Chunk 124
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, by any court of competent jurisdiction, such invalidity, illegality or unenforceability shall not affect any other provisions of this Agreement and the parties shall use
their reasonable efforts to substitute a valid, legal and enforceable provision which, insofar as practical, implements the purposes and intents of this Agreement.

Section 9. . The covenants contained herein shall apply to Shareholder solely in his or her capacity as a
shareholder of CNB, and no covenant contained herein shall apply to Shareholder in his or her capacity as a director, officer or employee of CNB or in any other capacity. Nothing contained in this Agreement shall be deemed to apply to, or limit in
any manner, the obligations of Shareholder to comply with his or her fiduciary duties as a director or officer, as applicable, of CNB.

Section 10. . This Agreement shall be governed by, and interpreted in accordance with, the laws of Commonwealth of
Pennsylvania, without regard for conflict of law provisions.

Section 12. . All notices and other communications
hereunder shall be in writing and shall be deemed given if delivered personally or sent by overnight courier (providing proof of delivery) to ESSA in accordance with Section 8.06 of the Merger Agreement and to the Shareholder at his, her or its
address set forth on attached hereto (or at such other address for a party as shall be specified by like notice).

(Remainder of page intentionally left blank.)

IN WITNESS WHEREOF, the parties hereto have executed and delivered this Agreement as of the date first written above.

| ESSA BANCORP, INC. |
| By:                |
| Name:              |
| Title:             |
| SHAREHOLDER        |
| Name:              |

[Signature Page to Voting Agreement]

EXHIBIT A

| NAME AND ADDRESS 
 OF SHAREHOLDER   |     | SHARES OF CNB COMMON STOCK BENEFICIALLY OWNED |

Exhibit 99.1 STRATEGIC MERGER CNB | ESSA January 10, 2025 O U R F A M I L Y O F B A N K S

Disclaimer & Forward-Looking Statements Forward-Looking Statements This communication contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements about CNB and ESSA and their industry involve substantial risks and uncertainties. Statements other than statements of current or historical fact, including