- 
        Signature
      
- 
        /s/Giorgio R. Saumat
      
      
- 
        Stock symbol
      
- 
        ETST
      
      
- 
        Transactions as of
      
- 
        Feb 20, 2024
      
      
- 
        Transactions value $
      
- 
        $4,740
      
      
- 
        Form type
      
- 
        4
      
      
- 
        Date filed
      
- 
        2/21/2024, 04:56 PM
      
 
     
   
 
  
    Transactions Table
  
  
    
      
        
          | Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes | 
      
      
          
            | transaction | ETST | Giorgio R. Saumat | Purchase | $4.74K | +60K | +0.05% | $0.08* | 120M | Feb 20, 2024 | Direct |  | 
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  
    Remarks:
  
  All purchases were made on the open market.