- 
        Signature
      
 
      - 
        /s/ Francis J Feeney
      
 
    
    
      
- 
        Stock symbol
      
 
      - 
        MCHX
      
 
    
    
      
- 
        Transactions as of
      
 
      - 
        Oct 16, 2025
      
 
    
    
      
- 
        Transactions value $
      
 
      - 
        $0
      
 
    
    
      
- 
        Form type
      
 
      - 
        4
      
 
    
    
      
- 
        Date filed
      
 
      - 
        10/17/2025, 04:15 PM
      
 
    
    
    
   
     
   
 
  
    Reporting Owners (1)
  
  
    
      
        
          | Name | 
          Relationship | 
          Address | 
          Signature | 
          Signature date | 
          CIK | 
        
      
      
          
            | Feeney Francis J | 
            Chief Operating Officer & CLO | 
            1200 5TH AVE, SUITE 1300, SEATTLE | 
            /s/ Francis J Feeney | 
            2025-10-17 | 
            0002087473 | 
          
      
    
   
  
    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 | 
        
      
      
          
            | transaction | 
            MCHX | 
            Restricted Stock Units | 
            Award | 
            $0 | 
            +150K | 
             | 
            $0.00 | 
            150K | 
            Oct 16, 2025 | 
            Class B Common Stock | 
            150K | 
             | 
            Direct | 
            F1 | 
          
          
            | transaction | 
            MCHX | 
            Employee Stock Option (right to buy) | 
            Award | 
            $0 | 
            +150K | 
             | 
            $0.00 | 
            150K | 
            Oct 16, 2025 | 
            Class B Common Stock | 
            150K | 
            $1.81 | 
            Direct | 
            F2 | 
          
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  
    Explanation of Responses: