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        Signature
      
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        By: /s/ Katherine E. Fleming
      
      
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        Stock symbol
      
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        ADN
      
      
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        Transactions as of
      
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        Jun 11, 2021
      
      
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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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        6/15/2021, 04:53 PM
      
 
     
   
 
  
    Transactions Table
  
  
    
      
        
          | Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes | 
      
      
          
            | transaction | ADN | Common Stock | Award | $0 | +9.65K |  | $0.00 | 9.65K | Jun 11, 2021 | Direct | F1 | 
          
            | transaction | ADN | Common Stock | Award | $0 | +9.65K | +100% | $0.00 | 19.3K | Jun 11, 2021 | Direct | F2 | 
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  
    Explanation of Responses:
  
  
  
    Remarks:
  
  See Exhibit 24 - Power of Attorney