Company: CCNE
Filing Date: 2025-02-20
Form Type: S-4
Source: 0001193125-25-030821
Chunk: 246

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-02-20
Form: S-4
Chunk 246
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 on January 28, 2025                           
 Quarter ended December 31, 2024, filed February 10, 2025                                                         |
|:---------------------------------------------|:----|:-----------------------------------------------------------------------------------------------------------------|
| Current Reports on Form 8-K                  |     | Filed December 11, 2024 and January 10, 2025 (other than the portions of those documents not deemed to be filed) |

In addition, CNB and ESSA each also incorporates by reference additional documents that it may file with the SEC under Section 13(a), 13(c), 14 or 15(d) of the Exchange Act, between the date of this joint proxy statement/prospectus and the dates of the CNB annual meeting and the ESSA special meeting. These documents include Annual Reports on Form 10-K,Quarterly Reports on Form 10-Q,Current Reports on Form 8-Kand 187

proxy statements. To the extent that any information contained in any Current Report on Form 8-K,or any exhibit to such report, was furnished to, rather than filed with, the SEC, such information or exhibit is not specifically incorporated by reference into this joint proxy statement/prospectus. Documents incorporated by reference are available from CNB and ESSA, without charge, excluding all exhibits unless an exhibit has been specifically incorporated by reference into this joint proxy statement/prospectus. You can obtain documents incorporated by reference into this joint proxy statement/prospectus by requesting them in writing or by telephone from the appropriate company at the following addresses and telephone numbers:

| CNB Financial Corporation 1 South Second Street 
 PO Box 42                                       
 Clearfield, Pennsylvania 16830                  
 Attention: Secretary                            
 (814) 765-9621 www.cnbbank.bank                 |     | ESSA Bancorp, Inc. 200 Palmer Street PO Box L Stroudsburg, Pennsylvania 18360 Attention: Stephanie Lefferson Corporate Secretary (570) 422-0182 www.essabank.com |

Neither CNB nor ESSA has authorized anyone to give any information or make any representation about the merger, the CNB annual meeting or the ESSA special meeting that is different from, or in addition to, that contained in this joint proxy statement/prospectus or in any of the materials that are incorporated by reference into this joint proxy statement/prospectus. Therefore, if anyone gives you information of this sort, you should not rely on it. This joint proxy statement/prospectus does