- 
        Signature
      
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        /s/ H. Baird Radford, III, by power of attorney
      
      
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        Stock symbol
      
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        ALLK
      
      
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        Transactions as of
      
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        May 15, 2025
      
      
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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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        5/15/2025, 04:01 PM
      
 
     
   
 
  
    Reporting Owners (1)
  
  
    
      
        
          | Name | Relationship | Address | Signature | Signature date | CIK | 
      
      
          
            | Andreatta Robert E | Director | 149 COMMONWEALTH DR, SUITE 1090, MENLO PARK | /s/ H. Baird Radford, III, by power of attorney | 2025-05-15 | 0001396785 | 
      
    
   
  
    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 | ALLK | Stock Option (right to buy) | Disposed to Issuer | $0 | -37.6K | -100% | $0.00 | 0 | May 15, 2025 | Common Stock | 37.6K | $16.00 | Direct | F1 | 
          
            | transaction | ALLK | Stock Option (right to buy) | Disposed to Issuer | $0 | -16K | -100% | $0.00 | 0 | May 15, 2025 | Common Stock | 16K | $40.00 | Direct | F1 | 
          
            | transaction | ALLK | Stock Option (right to buy) | Disposed to Issuer | $0 | -7.7K | -100% | $0.00 | 0 | May 15, 2025 | Common Stock | 7.7K | $72.54 | Direct | F1 | 
          
            | transaction | ALLK | Stock Option (right to buy) | Disposed to Issuer | $0 | -7.7K | -100% | $0.00 | 0 | May 15, 2025 | Common Stock | 7.7K | $99.83 | Direct | F1 | 
          
            | transaction | ALLK | Stock Option (right to buy) | Disposed to Issuer | $0 | -99.6K | -100% | $0.00 | 0 | May 15, 2025 | Common Stock | 99.6K | $2.62 | Direct | F1 | 
          
            | transaction | ALLK | Stock Option (right to buy) | Disposed to Issuer | $0 | -86.8K | -100% | $0.00 | 0 | May 15, 2025 | Common Stock | 86.8K | $4.81 | Direct | F1 | 
          
            | transaction | ALLK | Stock Option (right to buy) | Disposed to Issuer | $0 | -41K | -100% | $0.00 | 0 | May 15, 2025 | Common Stock | 41K | $1.42 | Direct | F1 | 
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  Robert E. Andreatta is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.
  
    Explanation of Responses: