Company: CCNE
Filing Date: 2025-03-05
Form Type: 424B3
Source: 0001193125-25-047258
Chunk: 134

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-03-05
Form: 424B3
Chunk 134
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ournment proposal requires the affirmative vote of a majority of the votes cast on such proposal. Abstentions and broker non-voteswill have no effect on any of the proposals. 106

Share Ownership of Management; Voting Agreements

As of the record date, the directors and executive officers of ESSA and their affiliates collectively owned 786,575 shares of ESSA common stock, which
represented approximately 7.75% of the outstanding shares of ESSA common stock. Each of the directors and executive officers of ESSA, solely in their capacity as a shareholder of ESSA, has entered into a voting agreement with CNB requiring each
of them to vote all shares of ESSA common stock beneficially owned by such person in favor of the ESSA merger proposal. As of the record date, these directors and executive officers of ESSA held 786,575 shares of ESSA common stock, which represented
approximately 7.75% of the outstanding shares of ESSA common stock.

When considering the ESSA Board of Directors’ recommendation that you vote in
favor of the ESSA merger proposal, you should be aware that the directors and executive officers of ESSA have interests in the merger that may be different from, or in addition to, the interests of shareholders of ESSA. See the section entitled
“The Merger—Interests of Certain ESSA Directors and Executive Officers in the Merger” beginning on page
145.

Voting of Proxies

If you are an ESSA shareholder, the ESSA Board of Directors requests that you return the proxy card accompanying this joint proxy statement/prospectus for use
at the ESSA special meeting. Please vote by internet, by telephone, or by completing and promptly mailing the proxy card in the enclosed postage-paid envelope.

All properly signed proxies received prior to the special meeting and not revoked before the vote at the special meeting will be voted at the special meeting
according to the instructions indicated on the proxies or, if no instructions are given, the shares will be voted “FOR” the ESSA merger proposal, “FOR” the ESSA compensation proposal and “FOR” the ESSA adjournment proposal, if necessary.

If you have any questions concerning the merger, the other meeting matters or this joint proxy statement/prospectus, or need
assistance voting your shares, the company representative or Laurel Hill Advisory Group, LLC, ESSA’s proxy solicitor