Company: CCNE
Filing Date: 2025-03-05
Form Type: 424B3
Source: 0001193125-25-047258
Chunk: 240

Company: CNB FINANCIAL CORP/PA
Filing Date: 2025-03-05
Form: 424B3
Chunk 240
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 respective adjustments (assuming a 21% tax rate). |

| (AD) | Reflects elimination of weighted average shares outstanding of ESSA. |

| (AE) | Reflects shares issued to ESSA as part of merger consideration. This is not a divestiture adjustment, but          
 rather the shares issued as part of the merger consideration that CNB management determined to separately present. |

| (AF) | Reflects the estimated interest expense accretion on time deposits recognized on a straight-line basis over one 
 year.                                                                                                           |

| (AG) | Reflects provision for estimated credit losses for non-PCD loans to be 
 recorded immediately following legal close of the transaction.         |

| (AH) | Reflects release of provision associated with sold loans and establishment of provision expense of 1.1% against 
 the loans funded as part of the divestiture adjustments.                                                        |

| (AI) | Reflects the net adjustment to record the gain/loss on the sale of $204.4 million worth of loans and 
 $97.1 million of deposits as part of the divestiture adjustments.                                    |

| (AJ) | Reflects pre-tax nonrecurring merger-related expenses expected to be 
 incurred of $27.6 million ($23.3 million post-tax).                  |

196

CNB FINANCIAL CORPORATION UNAUDITED COMPARATIVE PER-SHAREDATA As of and for the Nine Months Ended September 30, 2024

|                                             |     | CNB       
 Financial 
 Corp      |       |     | ESSA     
 Bancorp, 
 Inc.     |       |     | Pro      
 Forma    
 Combined |       |     | Ref |     |   |     | Pro        
 Forma      
 Equivalent 
 ESSA       
 Share      |       |     | Ref |     |   |
|:--------------------------------------------|:----|:----------|------:|:----|:---------|------:|:----|:---------|------:|:----|:----|:----|:--|:----|:-----------|------:|:----|:----|:----|:--|
| Basic Earnings Per Common Share             |     | $         |  1.73 |     | $        |  1.32 |     | $        |  2.11 |     |     | (AK | ) |     | $          |  1.81 |     |     | (