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        Signature
      
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        /s/ Byron Kahr, Attorney-in-Fact
      
      
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        Stock symbol
      
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        KLTR
      
      
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        Transactions as of
      
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        Jul 21, 2021
      
      
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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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        7/21/2021, 08:12 PM
      
 
     
   
 
  
    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 | 
      
      
          
            | holding | KLTR | Employee Stock option (Right to Buy) |  |  |  |  |  |  | Jul 21, 2021 | Common Stock | 972K | $1.72 | Direct | F1 | 
          
            | holding | KLTR | Employee Stock option (Right to Buy) |  |  |  |  |  |  | Jul 21, 2021 | Common Stock | 10.8K | $1.58 | Direct | F2 | 
          
            | holding | KLTR | Employee Stock option (Right to Buy) |  |  |  |  |  |  | Jul 21, 2021 | Common Stock | 338K | $4.99 | Direct | F3 | 
          
            | holding | KLTR | Employee Stock option (Right to Buy) |  |  |  |  |  |  | Jul 21, 2021 | Common Stock | 338K | $13.34 | Direct | F4 | 
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  
    Explanation of Responses:
  
  
  
    Remarks:
  
  Exhibit 24 Power of Attorney