Company: CCNE
Filing Date: 2025-02-20
Form Type: S-4
Source: 0001193125-25-030821
Chunk: 144

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-02-20
Form: S-4
Chunk 144
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 and held in the ESSA Bancorp, Inc. Stock Fund. Shares for which no voting instructions are given or for which instructions were not timely received will be voted in the same proportion as shares for which voting instructions were received. The deadline for returning your voting instruction form is , Eastern time on , 2025. How to Revoke Your Proxy If you are an ESSA shareholder, you may revoke your proxy at any time by taking any of the following actions before your proxy is voted at the special meeting:

| • |     | delivering a written notice bearing a date later than the date of your proxy card to the Corporate Secretary of ESSA at the address listed below, stating that you revoke your proxy; |

| • |     | submitting a new signed proxy card bearing a later date (if you submitted your proxy by internet or by telephone, you can vote again by internet or telephone) (any earlier proxies will be revoked automatically); or |

| • |     | attending the virtual special meeting and voting online during the meeting, although attendance at the special meeting will not, by itself, revoke a proxy. |

**You should send any notice of revocation to the following address: ESSA Bancorp, Inc. 200 Palmer Street PO Box L Stroudsburg, Pennsylvania 18360 Attention: Stephanie Lefferson Corporate Secretary If you hold your shares of ESSA common stock in “street name” through a bank, broker, trustee or other nominee, you must follow the directions you receive from your bank, broker, trustee or other nominee to change your vote. Voting Online during the Virtual Meeting If you are an ESSA shareholder, you may attend ESSA’s virtual special meeting and vote electronically during the meeting. Please note, however, that if your shares are held in “street name” through a bank, broker, trustee or other nominee and you wish to attend and vote at the special meeting, you must register in advance. To register, you must submit a legal proxy reflecting your ESSA common stock holdings along with your name and email address to Computershare at legalproxy@computershare.com. Requests for registration must be labeled as 108

“Legal Proxy” and be received no later than , Eastern time, on , 2025. You will receive a confirmation email with a control number from Computershare regarding your registration.

Whether or not you plan to attend the special meeting, ESSA requests that you vote by internet, by telephone, or by completing and mailing