Company: CCNE
Filing Date: 2025-04-09
Form Type: 425
Source: 0001193125-25-076836
Chunk: 1

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-04-09
Form: 425
Chunk 1
---
) or Rule 12b-2of the Securities Exchange Act of 1934 (§240.12b-2of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

| Item 8.01. | Other Events |

As previously disclosed, on January 9, 2025, CNB Financial Corporation (“CNB”) and CNB Bank, CNB’s subsidiary bank (“CNB Bank”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) with ESSA Bancorp, Inc. (“ESSA”) and ESSA Bank & Trust, ESSA’s subsidiary bank, (“ESSA Bank”), and pursuant to which ESSA will merge with and into CNB, with CNB as the surviving entity (the “Merger”). In connection with the proposed Merger, CNB filed with the Securities and Exchange Commission (the “SEC”) a Registration Statement on Form S-4,as amended, containing a prospectus of CNB and a joint proxy statement of CNB and ESSA, dated March 5, 2025 (collectively, the “joint proxy statement/prospectus”), which CNB and ESSA first mailed to their respective shareholders on or about March 7, 2025. Following the announcement of the Merger Agreement, between February 28, 2025 and March 28, 2025, CNB has received a total of five demand letters and ESSA has received a total of five demand letters from counsel representing purported shareholders of CNB or ESSA, as applicable (collectively, the “Demand Letters”), and ESSA is aware of two complaints, Eric Miller v. ESSA Bancorp, Inc. et al.,Index No. 651615/2025, filed in the Supreme Court of New York, County of New York, on March 25, 2025, and Mark Thomas v. ESSA Bancorp, Inc. et al.,Index No. 651689/2025, filed in the Supreme Court of New York, County of New York, on March 27, 2025 (together, the “Complaints”). The Demand Letters and Complaints allege, among other things, that CNB, E