**Exhibit 21**

**WATSONWYATT WORLDWIDE, INC.**

**SUBSIDIARIES**
| **SUBSIDIARY  NAME**                                 | ** ** | **JURISDICTION OF   INCORPORATION/  ORGANIZATION** | ** ** | **Name(s) under which   such subsidiary does   business (if   different)(a)** |
|------------------------------------------------------|------------|----------------------------------------------------|------------|-------------------------------------------------------------------------------|
|                                                 |       |                                               |       |                                                                          |
| Watson Wyatt Argentina S.A.                          |       | Argentina                                          |       |                                                                          |
| Watson Wyatt Australia Pty Ltd                       |       | Australia                                          |       |                                                                          |
| Wycomp Pty Ltd                                       |       | Australia                                          |       |                                                                          |
| Watson Wyatt Superannuation Pty Ltd                  |       | Australia                                          |       |                                                                          |
| Watson Wyatt NV                                      |       | Belgium                                            |       |                                                                          |
| Watson Wyatt Insurance & Financial Services SA   |       | Belgium                                            |       |                                                                          |
| Watson Wyatt Brasil Ltda.                            |       | Brazil                                             |       |                                                                          |
| Watson Wyatt Canada ULC                              |       | Canada, Alberta                                    |       |                                                                          |
| Watson Wyatt Chile S.A.                              |       | Chile                                              |       |                                                                          |
| Corredores de Seguros Watson Wyatt Limitada          |       | Chile                                              |       |                                                                          |
| Watson Wyatt Consultancy (Shanghai) Ltd.             |       | China                                              |       |                                                                          |
| Watson Wyatt Consultancy (Shenzhen) Ltd.             |       | China                                              |       |                                                                          |
| Watson Wyatt Hong Kong Limited                       |       | China                                              |       |                                                                          |
| Watson Wyatt Insurance Consulting Ltd.               |       | China                                              |       |                                                                          |
| Watson Wyatt Investment Consulting Hong Kong Limited |       | China                                              |       |                                                                          |
| Watson Wyatt Consultores Colombia S.A.               |       | Colombia                                           |       |                                                                          |
| Watson Wyatt S.A.R.L.                                |       | France                                             |       |                                                                          |
| Watson Wyatt GmbH                                    |       | Germany                                            |       |                                                                          |
| Watson Wyatt Deutschland GmbH                        |       | Germany                                            |       |                                                                          |
| Watson Wyatt Insurance Consulting GmbH               |       | Germany                                            |       |                                                                          |
| Watson Wyatt Kft                                     |       | Hungary                                            |       |                                                                          |
| Watson Wyatt (Ireland) Limited                       |       | Ireland                                            |       |                                                                          |
| Watson Wyatt India Private Limited                   |       | India                                              |       |                                                                          |
| Watson Wyatt Insurance Consulting Private Ltd        |       | India                                              |       |                                                                          |
| P.T. Watson Wyatt Purbajaga                          |       | Indonesia                                          |       |                                                                          |
| P.T. Watson Wyatt Indonesia                          |       | Indonesia                                          |       |                                                                          |
| Watson Wyatt Italia s.r.l.                           |       | Italy                                              |       |                                                                          |
| Watson Wyatt K.K.                                    |       | Japan                                              |       |                                                                          |
| Watson Wyatt Insurance Consulting KK                 |       | Japan                                              |       |                                                                          |
| Watson Wyatt Insurance Consulting (Korea) Limited    |       | Korea                                              |       |                                                                          |
| Watson Wyatt (Malaysia) Sdn. Bhd.                    |       | Malaysia                                           |       |                                                                          |
| Watson Wyatt Holdings (Mauritius) Limited            |       | Mauritius                                          |       |                                                                          |
| Watson Wyatt Mexico, S.A. de C.V.                    |       | Mexico                                             |       |                                                                          |
| Watson Wyatt B.V.                                    |       | Netherlands                                        |       |                                                                          |
| Watson Wyatt European Region B.V.                    |       | Netherlands                                        |       |                                                                          |
| Watson Wyatt Insurance Consulting BV                 |       | Netherlands                                        |       |                                                                          |
| Watson Wyatt Philippines, Inc.                       |       | Philippines                                        |       |                                                                          |
| Watson Wyatt Puerto Rico, Inc.                       |       | Puerto Rico                                        |       |                                                                          |
| Watson Wyatt Singapore Pte. Ltd.                     |       | Singapore                                          |       |                                                                          |
| Watson Wyatt Insurance Consulting Pte Ltd            |       | Singapore                                          |       |                                                                          |

 

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| Watson Wyatt de España, S.A.                                            |   | Spain         |   |   |
|------------------------------------------------------------------------------|--------|---------------|--------|--------|
| Watson Wyatt Insurance Consulting (Spain) SA                                 |   | Spain         |   |   |
| Watson Wyatt A.B.                                                            |   | Sweden        |   |   |
| Watson Wyatt AG                                                              |   | Switzerland   |   |   |
| Watson Wyatt (Thailand) Ltd.                                                 |   | Thailand      |   |   |
| Watson Wyatt Uruguay S.A.                                                    |   | Uruguay       |   |   |
| Wyatt Trustee Limited                                                        |   | U.K.          |   |   |
| PCL (1991) Limited                                                           |   | U.K.          |   |   |
| PCL Limited                                                                  |   | U.K.          |   |   |
| The Wyatt Company (UK) Limited                                               |   | U.K.          |   |   |
| The Wyatt Company Holdings Limited                                           |   | U.K.          |   |   |
| Watson Wyatt Holdings Limited                                                |   | U.K.          |   |   |
| Watson Wyatt Holdings (Europe) Limited                                       |   | U.K.          |   |   |
| Watson Wyatt International Limited                                           |   | U.K.          |   |   |
| Wyatt Financial Services Limited                                             |   | U.K.          |   |   |
| Wyatt Pension Plan Trustee Limited                                           |   | U.K.          |   |   |
| Watson Wyatt European Region Limited                                         |   | U.K.          |   |   |
| Watson Wyatt Limited                                                         |   | U.K.          |   |   |
| Watson Wyatt (UK) Acquisitions 1 Limited                                     |   | U.K.          |   |   |
| Watson Wyatt (UK) Acquisitions 2 Limited                                     |   | U.K.          |   |   |
| Watson Wyatt European Investment LP                                          |   | U.K.          |   |   |
| Watson Wyatt European Investment Holdings Limited                            |   | U.K.          |   |   |
| Watson Wyatt Insurance & Financial Services  Consulting Holdings Limited |   | U.K.          |   |   |
| Watson Wyatt Trustees Limited                                                |   | U.K.          |   |   |
| Watsons International Limited                                                |   | U.K.          |   |   |
| RWS Trustees Limited                                                         |   | U.K.          |   |   |
| Watson Wyatt Pretium Limited                                                 |   | U.K.          |   |   |
| Watson’s Pensioneer Trustees Limited                                    |   | U.K.          |   |   |
| Watson Wyatt Services Limited                                                |   | U.K.          |   |   |
| Watson Wyatt Healthcare Trustees Limited                                     |   | U.K.          |   |   |
| Watson Wyatt & Company                                                   |   | U.S. Delaware |   |   |
| Watson Wyatt Insurance Consulting, Inc.                                      |   | U.S. Delaware |   |   |
| Watson Wyatt Canadian Holdings, Inc.                                         |   | U.S. Delaware |   |   |
| Watson Wyatt Investment Consulting, Inc.                                     |   | U.S. Delaware |   |   |
| Wyatt Data Services, Inc.                                                    |   | U.S. Delaware |   |   |
| Watson Wyatt European Investment Holdings, Inc.                              |   | U.S. Delaware |   |   |
| Watson Wyatt European Investment Holdings 1, LLC                             |   | U.S. Delaware |   |   |
| Watson Wyatt European Investment Holdings 2, LLC                             |   | U.S. Delaware |   |   |
| Watson Wyatt Insurance & Financial Services,  Inc.                       |   | U.S. Delaware |   |   |
| Watson Wyatt International, Inc.                                             |   | U.S. Nevada   |   |   |

 

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(a)  All of these subsidiaries do business undertheir own name or under the name Watson Wyatt Worldwide.

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