- 
        Signature
      
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        /s/Todd Girolamo
      
      
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        Stock symbol
      
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        PROK
      
      
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        Transactions as of
      
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        Jul 11, 2022
      
      
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        Transactions value $
      
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        $0
      
      
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        Form type
      
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        3
      
      
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        Date filed
      
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        7/13/2022, 09:17 PM
      
 
     
   
 
  
    Transactions Table
  
  
    
      
        
          | Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes | 
      
      
          
            | holding | PROK | No securities owned. |  |  |  |  |  | 0 | Jul 11, 2022 | Direct |  | 
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  
    Remarks:
  
  Exhibit 24.1 - Power of Attorney