- 
        Signature
      
 
      - 
        /s/ Alex Dillard
      
 
    
    
      
- 
        Stock symbol
      
 
      - 
        DDS
      
 
    
    
      
- 
        Transactions as of
      
 
      - 
        Oct 24, 2022
      
 
    
    
      
- 
        Transactions value $
      
 
      - 
        $8,739
      
 
    
    
      
- 
        Form type
      
 
      - 
        4
      
 
    
    
      
- 
        Date filed
      
 
      - 
        10/26/2022, 05:07 PM
      
 
    
    
    
    
   
     
   
 
  
    Transactions Table
  
  
    
      
        
          | Type | 
          Sym | 
          Class | 
          Transaction | 
          Value $ | 
          Shares | 
          Change % | 
          * Price $ | 
          Shares After | 
          Date | 
          Ownership | 
          Footnotes | 
        
      
      
          
            | transaction | 
            DDS | 
            Common Class A | 
            Award | 
            $8.74K | 
            +28 | 
            +0% | 
            $312.11 | 
            1.01M | 
            Oct 24, 2022 | 
            Direct | 
             | 
          
          
            | holding | 
            DDS | 
            Common Class A - Retirement Plan | 
             | 
             | 
             | 
             | 
             | 
            0 | 
            Oct 24, 2022 | 
            Direct | 
             | 
          
          
            | holding | 
            DDS | 
            Common Class A | 
             | 
             | 
             | 
             | 
             | 
            41.5K | 
            Oct 24, 2022 | 
            See Footnote | 
            F1 | 
          
          
            | holding | 
            DDS | 
            Common Class A | 
             | 
             | 
             | 
             | 
             | 
            7.3K | 
            Oct 24, 2022 | 
            See Footnote | 
            F2 | 
          
          
            | holding | 
            DDS | 
            Common Class A | 
             | 
             | 
             | 
             | 
             | 
            36.5K | 
            Oct 24, 2022 | 
            See Footnote | 
            F3 | 
          
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  
    Explanation of Responses:
  
  
  
    Remarks:
  
  Remarks: The reporting person disclaims beneficial ownership of the shares reported herein as indirectly beneficially owned, except to the extent of his pecuniary interest therein.