Company: CCNE
Filing Date: 2025-04-08
Form Type: DEFA14A
Source: 0001193125-25-075120
Chunk: 0

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-04-08
Form: DEFA14A
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant To Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box:

| ☐ | Preliminary proxy statement |

| ☐ | Confidential, for use of the Commission Only (as permitted by Rule 
 14a-6(e)(2))                                                       |

| ☐ | Definitive proxy statement |

| ☒ | Definitive additional materials |

| ☐ | Soliciting material pursuant to § 240.14a-12 |

CNB Financial Corporation (Name of Registrant as Specified In Its Charter) (Name of Person(s) Filing Proxy Statement, if other than the Registrant) Payment of Filing Fee (Check all boxes that apply):

| ☒ | No fee required. |

| ☐ | Fee paid previously with preliminary materials. |

| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 
 14a-6(i)(1) and 0-11.                                                          |

News Release

| Contact: |     | Tito L. Lima Treasurer 
 (814) 765-9621 FOR     
 IMMEDIATE RELEASE      |

CNB Financial Corporation Announces that ISS Recommends Shareholders Support the Proposal to Issue Common Stock in connection with the Merger with ESSA Bancorp, Inc., the Proposal to Approve the 2025 Omnibus Incentive Plan and the Say-on-Pay Proposal CLEARFIELD, Pa., April 8, 2025 – CNB Financial Corporation (“CNB”) (NASDAQ: CCNE) is pleased to announce that leading independent proxy advisory firm Institutional Shareholder Services Inc (“ISS”) is recommending that CNB shareholders vote “FOR” each of (1) the proposal to issue shares of CNB common stock in connection with the merger of ESSA Bancorp, Inc. (“ESSA”) with and into CNB; (2) the proposal to approve the CNB Financial Corporation 2025 Omnibus Incentive Plan; and (3) the non-binding advisoryresolution to approve the compensation of CNB’s named executive officers in advance of the upcoming CNB Annual Meeting of Shareholders (the “Annual Meeting”). The Annual Meeting will be held at 2:00 p.m., Eastern Time,