Company: CCNE
Filing Date: 2025-03-05
Form Type: 424B3
Source: 0001193125-25-047258
Chunk: 138

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-03-05
Form: 424B3
Chunk 138
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 each agreed to share equally the costs of filing, printing and mailing this joint proxy statement/prospectus. Following
the original mailing of the proxies and other soliciting materials, ESSA and its agents may also solicit proxies by mail, telephone, facsimile or in person. No additional compensation will be paid to directors, officers or other employees of ESSA
for making these solicitations.

ESSA has retained a proxy solicitation firm, Laurel Hill Advisory Group, LLC, to aid it in the solicitation process. ESSA
estimates it will pay a fee of approximately $7,500 plus certain expenses and has agreed to indemnify Laurel Hill Advisory Group, LLC against certain losses. ESSA intends to reimburse persons who hold ESSA common stock of record but not
beneficially, such as brokers, custodians, nominees and fiduciaries, for their reasonable expenses in forwarding copies of proxies and other soliciting materials to, and requesting authority for the exercise of proxies from, the persons for whom
they hold the shares.

This joint proxy statement/prospectus and the proxy card are first being sent to ESSA shareholders on or about March 7, 2025.

109

Stock Certificates and Book-Entry Shares

If you are an ESSA shareholder, you should not send in any certificates representing ESSA common stock. Following completion of the merger, you will receive
instructions for the exchange of your certificates representing ESSA common stock.

If your shares of ESSA common stock are held in book-entry form, you
will not be required to take any additional actions. Promptly following the completion of the merger, shares of ESSA common stock held in book-entry form will automatically be exchanged for the merger consideration.

110

ESSA PROPOSAL 1 – THE MERGER PROPOSAL

ESSA shareholders are being asked to consider and vote on a proposal to approve the merger agreement, a copy of which is attached as to this
joint proxy statement/prospectus. For a summary and detailed information regarding this proposal, see the information about the merger and the merger agreement throughout this joint proxy statement/prospectus, including the information set forth in
the sections entitled “The Merger” and “The Merger Agreement” beginning on pages 112 and 156, respectively, of this joint proxy statement/prospectus.

Pursuant to the merger agreement, approval of this proposal is a condition to the consummation of the merger. If