Company: CCNE
Filing Date: 2025-03-03
Form Type: S-4/A
Source: 0001193125-25-044149
Chunk: 368

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-03-03
Form: S-4/A
Chunk 368
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 BANCORP, INC. |     |                                       |
| By:                |     | /s/ Gary S. Olson                     |
| Name:              |     | Gary S. Olson                         |
| Title:             |     | President and Chief Executive Officer |
| ESSA BANK & TRUST  |     |                                       |
| By:                |     | /s/ Gary S. Olson                     |
| Name:              |     | Gary S. Olson                         |
| Title:             |     | President and Chief Executive Officer |

[Signature Page to Agreement and Plan of Merger]

#### Exhibit A

#### Form of ESSA Voting Agreement
VOTING AGREEMENT This VOTING AGREEMENT(this “ Agreement”) is dated as of January 9, 2025, by and between [_________] (the “ Shareholder”) and CNB Financial Corporation, a Pennsylvania corporation (“ CNB”). All terms used herein and not defined herein shall have the meanings assigned thereto in the Merger Agreement (as defined below). WHEREAS,concurrently with the execution of this Agreement, CNB, CNB Bank, a Pennsylvania-chartered nonmember bank and wholly-owned subsidiary of CNB (“ CNB Bank”), ESSA Bancorp, Inc., a Pennsylvania corporation (“ ESSA”), and ESSA Bank & Trust, a Pennsylvania-chartered stock savings bank and wholly-owned subsidiary of ESSA (“ ESSA Bank”), are entering into an Agreement and Plan of Merger (as such agreement may be subsequently amended or modified, the “ Merger Agreement”), pursuant to which ESSA will merge with and into CNB, with CNB surviving, and immediately thereafter, ESSA Bank will merge with and into CNB Bank, with CNB Bank surviving, and in connection therewith, shares of ESSA Stock shall, at the Effective Time, be converted into the right to receive the Merger Consideration; WHEREAS,Shareholder beneficially owns and has the power to vote or direct the voting of the number of shares of ESSA Stock identified on Exhibit Ahereto (such shares, together with all shares of ESSA Stock with respect to which Shareholder subsequently acquires beneficial ownership, and has the power to vote or direct the voting of such shares, during the term of this Agreement, including the right to acquire beneficial ownership (as defined in Rule 13d-3under the Securities Exchange Act of 1934, as amended) through the exercise of any stock options