EXHIBIT 21



Subsidiaries of NetIQ Corporation



|                                                 |  |                
|------------------------------------------------ |  | ---------------
|Subsidiary                                       |  | Jurisdiction   
|                                                 | 
|NetIQ Pty Ltd.                                   |  | Australia      
|                                                 | 
|NetIQ do Brasil Ltda.                            |  | Brazil         
|                                                 | 
|NetIQ Europe Limited                             |  | Ireland        
|                                                 | 
|NetIQ Deutschland GmbH                           |  | Germany        
|                                                 | 
|NetIQ Ireland Limited                            |  | Ireland        
|                                                 | 
|NetIQ Software International Limited             |  | Cyprus         
|                                                 | 
|NetIQ K.K.                                       |  | Japan          
|                                                 | 
|NetIQ Nederlands                                 |  | The Netherlands
|                                                 | 
|NetIQ Benelux                                    |  | Benelux        
|                                                 | 
|NetIQ Canada Corporation                         |  | Canada         
|                                                 | 
|NetIQ Denmark Aps                                |  | Denmark        
|                                                 | 
|NetIQ France Sarl                                |  | France         
|                                                 | 
|NetIQ Asia Limited                               |  | Hong Kong      
|                                                 | 
|NetIQ Italia Srl                                 |  | Italy          
|                                                 | 
|NetIQ Asia Pty Ltd.                              |  | Singapore      
|                                                 | 
|NetIQ Software Espana SL                         |  | Spain          
|                                                 | 
|NetIQ Limited                                    |  | United Kingdom 
|                                                 | 
|NetIQ Sweden AB                                  |  | Sweden         
|                                                 | 
|Database Tools Development (Proprietary) Limited |  | South Africa   
|                                                 | 
|Marshal Software Limited                         |  | New Zealand    
|                                                 | 
|Marshal International Limited                    |  | New Zealand    
|                                                 | 
|Marshal Software LLC                             |  | Georgia, USA   
|                                                 | 
|Mission Critical Software, Inc.                  |  | Delaware, USA  
|                                                 | 
|PentaSafe Security Technologies, Inc.            |  | Texas, USA     
|                                                 | 
|PentaSafe Acquisition Corp.                      |  | Texas, USA     
|                                                 | 
|PentaSafe Distribution, Inc.                     |  | Delaware, USA  
|                                                 | 
|PentaSafe Security Technologies, Ltd.            |  | United Kingdom 
|                                                 | 
|PentaSafe Security Technologies, GmbH            |  | Germany        
|                                                 | 
|PentaSafe Services, Inc.                         |  | Delaware, USA  
|                                                 | 
|PentaSafe Security Technologies A/S              |  | Denmark