Exhibit 21

INTERACTIVE DATA CORPORATION & SUBSIDIARIES

As of
December 31, 2010



|                                                                                                                                                                                                                                                                                                 |  |                                                                                                   
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |  | --------------------------------------------------------------------------------------------------
|Company Name                                                                                                                                                                                                                                                                                     |  | State or Country
of Incorporation or Organization                                                 
|Infotec Holdings Corp.                                                                                                                                                                                                                                                                           |  | Delaware                                                                                          
|Subsidiaries of Infotec Holdings Corp.                                                                                                                                                                                                                                                           |  |                                                                                                   
|Interactive Data Pricing and Reference Data, Inc.                                                                                                                                                                                                                                                |  | Delaware                                                                                          
|Subsidiaries of Interactive Data Pricing and Reference Data, Inc.                                                                                                                                                                                                                                |  |                                                                                                   
|Exshare Financial Incorporated                                                                                                                                                                                                                                                                   |  | Delaware                                                                                          
|Interactive Data Canada Inc.                                                                                                                                                                                                                                                                     |  | Canada                                                                                            
|                                                                                                                                                                                                                                                                                                 | 
|Interactive Data Luxembourg Holding S.A.R.L.                                                                                                                                                                                                                                                     |  | Luxembourg                                                                                        
|Subsidiaries of Interactive Data Luxembourg Holding S.A.R.L.                                                                                                                                                                                                                                     |  |                                                                                                   
|Interactive Data Luxembourg Management S.A.R.L.                                                                                                                                                                                                                                                  |  | Luxembourg                                                                                        
|Subsidiaries of Interactive Data Luxembourg Management S.A.R.L.                                                                                                                                                                                                                                  |  |                                                                                                   
|Interactive Data Cayman Ltd.                                                                                                                                                                                                                                                                     |  | Cayman Islands                                                                                    
|IDCO Worldwide Holdings Ltd.                                                                                                                                                                                                                                                                     |  | United Kingdom                                                                                    
|Subsidiaries of IDCO Worldwide Holdings Ltd.                                                                                                                                                                                                                                                     |  |                                                                                                   
|IDCO Overseas Capital Management Ltd.                                                                                                                                                                                                                                                            |  | United Kingdom                                                                                    
|IDCO Overseas Holdings Ltd.                                                                                                                                                                                                                                                                      |  | United Kingdom                                                                                    
|Subsidiaries of IDCO Overseas Holdings Ltd.                                                                                                                                                                                                                                                      |  |                                                                                                   
|Interactive Data (Ireland) Ltd.
Interactive Data (Jersey) Ltd.
Interactive Data (Hong Kong) Ltd.
Interactive Data (Australia) Pty. Ltd.
Interactive Data Desktop Solutions (Europe) Ltd.
Interactive Data Corp. France S.A.S.
Interactive Data (Singapore) PTE Ltd.
Interactive Data Europe Ltd. |  | IrelandChannel Islands, UK Hong Kong, PRC Australia
United Kingdom
France
Singapore United
Kingdom
|Subsidiaries of Interactive Data (Europe) Ltd.                                                                                                                                                                                                                                                   |  |                                                                                                   
|Interactive Data Japan KK
Exshare Financial (US) Ltd.
Exshare Statistical Services Ltd.
W&W Ltd. Interactive Data Klers S.r.l. Interactive Data
Finance Ltd. Exshare Computing Ltd.                                                                                                             |  | JapanUnited Kingdom
United Kingdom
United Kingdom
Italy United
Kingdom United Kingdom             
|Subsidiaries of Exshare Computing Ltd.                                                                                                                                                                                                                                                           |  |                                                                                                   
|The Exchange Telegraph Company Ltd.                                                                                                                                                                                                                                                              |  | United Kingdom                                                                                    
|                                                                                                                                                                                                                                                                                                 | 
|Interactive Data Management & Services Verwaltungs GmbH                                                                                                                                                                                                                                          |  | Germany                                                                                           
|Subsidiaries of Interactive Data Management & Services Verwaltungs GmbH                                                                                                                                                                                                                          |  |                                                                                                   
|Interactive Data Managed Solutions Nordic Oy
Interactive Data Managed Solutions AG                                                                                                                                                                                                               |  | FinlandGermany                                                                                    
|Subsidiaries of Interactive Data Managed Solutions AG                                                                                                                                                                                                                                            |  |                                                                                                   
|Interactive Data Managed Solutions SAS
Interactive Data Managed Solutions S.L.
Interactive Data Managed Solutions Ltd.
Interactive Data Managed Solutions AG
Interactive Data Managed Solutions S.r.l.                                                                                           |  | FranceSpain
United Kingdom
Switzerland
Italy                                                      
|                                                                                                                                                                                                                                                                                                 | 
|Interactive Data Real-Time Group, Inc.                                                                                                                                                                                                                                                           |  | Delaware                                                                                          
|                                                                                                                                                                                                                                                                                                 | 
|GTIS Corporation                                                                                                                                                                                                                                                                                 |  | Delaware                                                                                          
|                                                                                                                                                                                                                                                                                                 | 
|Interactive Data Real-Time Services, Inc.                                                                                                                                                                                                                                                        |  | New York                                                                                          
|                                                                                                                                                                                                                                                                                                 | 
|Interactive Data Managed Solutions, LLC                                                                                                                                                                                                                                                          |  | Delaware                                                                                          
|                                                                                                                                                                                                                                                                                                 | 
|IDCO Nominees, LLC                                                                                                                                                                                                                                                                               |  | Delaware                                                                                          
|                                                                                                                                                                                                                                                                                                 | 
|Interactive Data Online Properties, Inc.                                                                                                                                                                                                                                                         |  | Delaware                                                                                          
|                                                                                                                                                                                                                                                                                                 | 
|eSignal.com, Inc.                                                                                                                                                                                                                                                                                |  | Delaware                                                                                          
|                                                                                                                                                                                                                                                                                                 | 
|Shark Holdings, Inc.                                                                                                                                                                                                                                                                             |  | Delaware                                                                                          
|                                                                                                                                                                                                                                                                                                 | 
|Data Broadcasting Corp.                                                                                                                                                                                                                                                                          |  | British Virgin Islands                                                                            
|                                                                                                                                                                                                                                                                                                 | 
|IDCO Canada Holdings, Inc.                                                                                                                                                                                                                                                                       |  | Canada