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        Signature
      
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        /s/ Kerry Acocella, Attorney-in-Fact
      
      
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        Stock symbol
      
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        DDOG
      
      
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        Transactions as of
      
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        Jun 16, 2025
      
      
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        Transactions value $
      
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        -$956,728
      
      
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        Form type
      
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        4
      
      
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        Date filed
      
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        6/18/2025, 04:57 PM
      
 
     
   
 
  
    Reporting Owners (1)
  
  
    
      
        
          | Name | Relationship | Address | Signature | Signature date | CIK | 
      
      
          
            | Shah Shardul | Director | C/O DATADOG, INC., 620 8TH AVENUE, 45TH FLOOR, NEW YORK | /s/ Kerry Acocella, Attorney-in-Fact | 2025-06-18 | 0001783882 | 
      
    
   
  
    Transactions Table
  
  
    
      
        
          | Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes | 
      
      
          
            | transaction | DDOG | Class A Common Stock | Sale | -$957K | -7.92K | -2% | $120.86 | 388K | Jun 16, 2025 | By Trust | F1, F2 | 
          
            | holding | DDOG | Class A Common Stock |  |  |  |  |  | 2.11K | Jun 16, 2025 | Direct |  | 
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.
  Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).
  
    Explanation of Responses: