Company: CCNE
Filing Date: 2025-03-05
Form Type: 424B3
Source: 0001193125-25-047258
Chunk: 206

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-03-05
Form: 424B3
Chunk 206
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; |

| • |     | financial controls and procedures; |

| • |     | absence of certain changes or events; |

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| • |     | regulatory matters; |

| • |     | legal proceedings; |

| • |     | compliance with laws; |

| • |     | brokers; |

| • |     | employee benefit plans; |

| • |     | labor matters; |

| • |     | tax matters; |

| • |     | loans and nonperforming and classified assets; |

| • |     | inapplicability of antitakeover laws; |

| • |     | investment securities; |

| • |     | insurance; |

| • |     | opinion of financial advisor; and |

| • |     | anti-money laundering, community reinvestment and customer information security. |

In addition, ESSA and ESSA Bank have made representations and warranties to CNB regarding, among other things:

| • |     | regulatory action; |

| • |     | environmental matters; |

| • |     | derivative transactions; |

| • |     | material contracts; |

| • |     | defaults; |

| • |     | tangible properties and assets; |

| • |     | intellectual property; |

| • |     | fiduciary accounts; and |

| • |     | transactions with affiliates. |

In addition, CNB has made representations and warranties to ESSA regarding, among other things:

| • |     | deposit insurance; and |

| • |     | stock issued in the merger. |

The representations and warranties of each of CNB and ESSA will expire upon the effective time of the merger. The representations and warranties in the merger agreement are complicated and not easily summarized. You are urged to carefully read Articles III and IV of the merger agreement attached to this joint proxy statement/prospectus as Annex A. Conduct of Business Pending the Merger Conduct of Business of ESSA and ESSA Bank Pending the Merger Under the merger agreement, ESSA and ESSA Bank have agreed that, until the effective time of the merger or the termination of the merger agreement, ESSA and ESSA Bank will not, except as expressly permitted by the 159

merger agreement or with the prior written consent of CNB or as otherwise required by law or any governmental authority:

| • |     | conduct their businesses other than in the ordinary course consistent with past practice and prudent banking 
 practice, and