Company: CCNE
Filing Date: 2025-03-05
Form Type: 424B3
Source: 0001193125-25-047258
Chunk: 368

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-03-05
Form: 424B3
Chunk 368
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 Our opinion is not intended to and does not constitute a recommendation to any shareholder as to how such shareholder should vote or act with respect to the Merger or any matter
relating thereto.

PNC Capital Markets LLC

Member of The PNC Financial Services Group

The Tower at PNC
Plaza 300 Fifth Avenue Pittsburgh Pennsylvania 15222-2724

www.pnc.com

Products and services are offered through PNC Capital Markets LLC, a registered broker dealer, member FINRA and SIPC a subsidiary of PNC Bank, N.A.: Not FDIC
Insured. No Bank or Federal Government Guarantee. May Lose Value.

C-4

Based on the foregoing, our experience, and other factors we deemed relevant, it is our opinion that, as of the date hereof, that the Exchange Ratio provided for in the Merger Agreement in connection with the Merger is fair to the holders of ESSA Common Stock from a financial point of view.

| Respectfully submitted, |
| /s/ PNC FIG Advisory    |
| PNC FIG Advisory        |

PNC Capital Markets LLC Member of The PNC Financial Services Group The Tower at PNC Plaza 300 Fifth Avenue Pittsburgh Pennsylvania 15222-2724 www.pnc.com Products and services are offered through PNC Capital Markets LLC, a registered broker dealer, member FINRA and SIPC a subsidiary of PNC Bank, N.A.: Not FDIC Insured. No Bank or Federal Government Guarantee. May Lose Value. C-5

ANNEX D

CNB FINANCIAL CORPORATION 2025 OMNIBUS INCENTIVE PLAN

[This annex is provided to CNB shareholders for their review in connection with

the CNB incentive plan proposal.]

CNB FINANCIAL CORPORATION

2025 OMNIBUS INCENTIVE PLAN

TABLE OF CONTENTS

|     |     |                                                                       |     |                                                                             |     |                              |     | Page |      |
| 1.  |     |                                                               PURPOSE |     |                                                                             |     |                              |     |      | D-1  |
| 2.  |     |                                                           DEFINITIONS |     |                                                                             |     |                              |     |      | D-1  |
| 3.  |     |                                            ADMINISTRATION OF THE PLAN |     |                                                                             |     |                              |     |      | D-6  |
|     |     |                                                                   3.1 |     | Committee                                                                   |     |                              |     |      |