Company: CCNE
Filing Date: 2025-03-05
Form Type: 424B3
Source: 0001193125-25-047258
Chunk: 3

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-03-05
Form: 424B3
Chunk 3
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orp, Inc.                    |

Neither the Securities and Exchange Commission nor any state securities commission or bank regulatory agency has approved or disapproved of the securities to be issued in the merger or determined if the attached joint proxy statement/prospectus is accurate, adequate or complete. Any representation to the contrary is a criminal offense. The shares of CNB common stock to be issued in the merger are not savings accounts, deposits or other obligations of any bank or savings association and are not insured by the Federal Deposit Insurance Corporation or any federal or state governmental agency. This joint proxy statement/prospectus is dated March 5, 2025, and is first being mailed to CNB shareholders and ESSA shareholders on or about March 7, 2025.

1 South Second Street P.O. Box 42 Clearfield, PA 16830 (814) 765-9621 NOTICE OF ANNUAL MEETING OF SHAREHOLDERS TO BE HELD ON APRIL 15, 2025 An annual meeting of shareholders of CNB Financial Corporation (“CNB”) will be held virtually on April 15, 2025, at 2:00 p.m., Eastern time, to consider and vote upon the following matters:

| 2. | the election to the CNB Board of Directors of the three Class 2 directors set forth in the enclosed joint                               
 proxy statement/prospectus to serve until the 2028 annual meeting of CNB shareholders or until their respective successors are elected; |

| 3. | a proposal to approve the CNB Financial Corporation 2025 Omnibus Incentive Plan (the “CNB incentive plan 
 proposal”);                                                                                              |

| 4. | a non-binding advisory resolution to approve the compensation of 
 CNB’s named executive officers (the “CNB say-on-pay proposal”);  |

| 6. | a proposal to approve one or more adjournments of the CNB annual meeting, if necessary or appropriate, to                                                                                                                            
 permit further solicitation of proxies if there are insufficient votes at the time of the CNB annual meeting, or at an adjournment or postponement of that meeting, to approve the CNB share issuance proposal (the “CNB adjournment 
 proposal”).                                                                                                                                                                                                                          |

The merger agreement and proposed merger are more fully described in the attached joint proxy statement/prospectus, which you should read carefully and in its entirety before voting. A copy of the merger agreement is included as Annex Ato the attached joint proxy statement