Company: CCNE
Filing Date: 2025-04-09
Form Type: 425
Source: 0001193125-25-076836
Chunk: 13

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-04-09
Form: 425
Chunk 13
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’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024, in
ESSA’s Annual Report on Form 10-K for the fiscal year ended September 30, 2024 and in subsequent filings CNB and ESSA make with the SEC.

Forward-looking statements speak only as of the date they are made. CNB and ESSA do not undertake, and specifically disclaim any obligation, to publicly
release the result of any revisions which may be made to any forward-looking statements to reflect the occurrence of anticipated or unanticipated events or circumstances after the date of such statements. You are cautioned not to place undue
reliance on these forward-looking statements.

SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

| Date: April 9, 2025 |     | CNB FINANCIAL CORPORATION 
 By:                       |     | /s/ Tito L. Lima |
|:--------------------|:----|:--------------------------|:----|:-----------------|
|                     |     |                           |     | Tito L. Lima     |
|                     |     |                           |     | Treasurer        |