Company: CCNE
Filing Date: 2025-01-10
Form Type: 425
Source: 0001193125-25-004105
Chunk: 3

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-01-10
Form: 425
Chunk 3
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, reference is made to the joint press release dated January 10, 2025, which is included as Exhibit 99.2 and is incorporated herein by reference.

Important Additional Information and Where to Find It

In connection with the proposed transaction, CNB expects to file with the Securities and Exchange Commission (“SEC”) a registration statement on Form
S-4 that will include a document that serves as a prospectus of CNB and a joint proxy statement of CNB and ESSA (the “joint proxy statement/prospectus”), which joint proxy statement/prospectus will
be mailed or otherwise disseminated to CNB’s and ESSA’s shareholders when it becomes available. CNB and ESSA also plan to file other relevant documents with the SEC regarding the proposed transaction. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT ON FORM S-4,THE JOINT PROXY STATEMENT/PROSPECTUS TO BE INCLUDED WITHIN THE REGISTRATION STATEMENT ON FORM S-4,AND ANY OTHER RELEVANT DOCUMENTS FILED OR TO BE FILED WITH THE SEC WHEN THEY BECOME AVAILABLE, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT CNB, ESSA AND THE PROPOSED TRANSACTION. You may
obtain a free copy of the registration statement, including the proxy statement/prospectus (when it becomes available) and other relevant documents filed by CNB and ESSA with the SEC, without charge, at the SEC’s website at www.sec.gov. Copies
of the documents filed by CNB with the SEC will be available free of charge on CNB’s website at www.cnbbank.com or by directing a request to CNB Financial Corporation, 1 South Second Street, PO Box 42, Clearfield, PA, attention: Treasurer,
telephone (814) 765-9621. Copies of the documents filed by ESSA with the SEC will be available free of charge on ESSA’s website at www.essabank.com or by directing a request to ESSA Bancorp, Inc., 200
Palmer Street, Stroudsburg, PA 18360, attention: Stephanie Lefferson, telephone (570) 422-0182.

No Offer

This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities. No offering of securities shall be made except
by