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        Signature
      
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        /s/ Joe Reeder
      
      
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        Stock symbol
      
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        PESI
      
      
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        Transactions as of
      
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        Jul 18, 2024
      
      
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        Transactions value $
      
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        $0
      
      
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        Form type
      
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        4
      
      
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        Date filed
      
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        7/19/2024, 09:00 AM
      
 
     
   
 
  
    Transactions Table
  
  
    
      
        
          | Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes | 
      
      
          
            | holding | PESI | Common Stock |  |  |  |  |  | 238K | Jul 18, 2024 | Direct |  | 
      
    
   
  
    Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)
  
  
    
      
        
          | Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes | 
      
      
          
            | transaction | PESI | Stock Option (Right to Buy) | Award | $0 | +10K |  | $0.00 | 10K | Jul 18, 2024 | Common Stock | 10K | $10.20 | Direct | F4 | 
          
            | holding | PESI | Stock Option (Right to Buy) |  |  |  |  |  | 5K | Jul 18, 2024 | Common Stock | 5K | $5.93 | Direct | F1 | 
          
            | holding | PESI | Stock Option (Right to Buy) |  |  |  |  |  | 7.5K | Jul 18, 2024 | Common Stock | 7.5K | $5.15 | Direct | F2 | 
          
            | holding | PESI | Stock Option (Right to Buy) |  |  |  |  |  | 10K | Jul 18, 2024 | Common Stock | 10K | $9.81 | Direct | F3 | 
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  
    Explanation of Responses: