- 
        Signature
      
- 
        /s/ Margaret Chow, by Power of Attorney for Huw Owen
      
      
- 
        Stock symbol
      
- 
        BASE
      
      
- 
        Transactions as of
      
- 
        Jun 20, 2025
      
      
- 
        Transactions value $
      
- 
        -$261,899
      
      
- 
        Form type
      
- 
        4
      
      
- 
        Date filed
      
- 
        6/24/2025, 04:55 PM
      
 
     
   
 
  
    Reporting Owners (1)
  
  
    
      
        
          | Name | Relationship | Address | Signature | Signature date | CIK | 
      
      
          
            | Owen Huw | SVP & Chief Revenue Officer | C/O COUCHBASE, INC., 3155 OLSEN DR., SUITE 150, SAN JOSE | /s/ Margaret Chow, by Power of Attorney for Huw Owen | 2025-06-24 | 0001931799 | 
      
    
   
  
    Transactions Table
  
  
    
      
        
          | Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes | 
      
      
          
            | transaction | BASE | Common Stock | Sale | -$262K | -10.7K | -2.65% | $24.44 | 394K | Jun 20, 2025 | Direct | F1 | 
      
    
   
  
    * 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: