**Exhibit 21**

** **

**WATSON WYATT WORLDWIDE, INC.**

 

**SUBSIDIARIES**

 

**(3-31-08)**

 
| **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 (Austria) GmbH                              |       | Austria                                              |       |                                                                                  |
|                                                      |       |                                                 |       |                                                                                  |
| Watson  Wyatt Insurance and Financial Services SA         |       | Belgium                                              |       |                                                                                  |
|                                                      |       |                                                 |       |                                                                                  |
| Watson  Wyatt NV                                          |       | Belgium                                              |       |                                                                                  |
|                                                      |       |                                                 |       |                                                                                  |
| Watson  Wyatt Brasil Ltda                                 |       | Brazil                                               |       |                                                                                  |
|                                                      |       |                                                 |       |                                                                                  |
| Watson  Wyatt Canada ULC                                  |       | Canada                                               |       |                                                                                  |
|                                                      |       |                                                 |       |                                                                                  |
| 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 Consultores Colombia S.A.                   |       | Colombia                                             |       |                                                                                  |
|                                                      |       |                                                 |       |                                                                                  |
| Watson  Wyatt & Company                          |       | Delaware                                             |       |                                                                                  |
|                                                      |       |                                                 |       |                                                                                  |
| Wyatt  Data Services, Inc.                           |       | Delaware                                             |       |                                                                                  |
|                                                      |       |                                                 |       |                                                                                  |
| Watson  Wyatt Investment Consulting, Inc.            |       | Delaware                                             |       |                                                                                  |
|                                                      |       |                                                 |       |                                                                                  |
| Watson  Wyatt Insurance Consulting, Inc.             |       | Delaware                                             |       |                                                                                  |
|                                                      |       |                                                 |       |                                                                                  |
| Watson  Wyatt Insurance and Financial Services, Inc. |       | Delaware                                             |       |                                                                                  |
|                                                      |       |                                                 |       |                                                                                  |
| Watson  Wyatt Canadian Holdings, Inc.                |       | Delaware                                             |       |                                                                                  |

 

1

----

 
| Watson  Wyatt European Investment Holdings, Inc.   |   | Delaware    |
|---------------------------------------------------------|--------|-------------|
|                                                    |   |        |
| Watson  Wyatt European Investment Holdings 1, LLC       |   | Delaware    |
|                                                    |   |        |
| Watson  Wyatt European Investment Holdings 2, LLC       |   | Delaware    |
|                                                    |   |        |
| Watson  Wyatt Dubai LLC                                 |   | Dubai,  UAE |
|                                                    |   |        |
| Watson  Wyatt SARL                                      |   | France      |
|                                                    |   |        |
| Buck  Heissmann Sarl                                    |   | France      |
|                                                    |   |        |
| Watson  Wyatt Heissmann (Dussledorf) GmbH               |   | Germany     |
|                                                    |   |        |
| Watson  Wyatt Heissmann (Munchen-Frankfurt) GmbH        |   | Germany     |
|                                                    |   |        |
| Watson  Wyatt Insurance Consulting GmbH                 |   | Germany     |
|                                                    |   |        |
| Watson  Wyatt Heissmann GmbH                            |   | Germany     |
|                                                    |   |        |
| Buck  Heissmann Holdings GmbH                           |   | Germany     |
|                                                    |   |        |
| IPC  Heissmann Versicherungsservice GmbH                |   | Germany     |
|                                                    |   |        |
| Verlag  Arbeit Und Alter GmbH                           |   | Germany     |
|                                                    |   |        |
| Heissmann  Consultants GmbH                             |   | Germany     |
|                                                    |   |        |
| PM&S  Pensions-managment und Sicherungs-Treuhand AG |   | Germany     |
|                                                    |   |        |
| Buck  Heissmann GmbH                                    |   | Germany     |
|                                                    |   |        |
| Watson  Wyatt Insurance Consulting Ltd                  |   | Hong  Kong  |
|                                                    |   |        |
| Watson  Wyatt Hong Kong Limited                         |   | Hong  Kong  |
|                                                    |   |        |
| Watson  Wyatt Investment Consulting Hong Kong Limited   |   | Hong  Kong  |
|                                                    |   |        |
| Watson  Wyatt Kft                                       |   | Hungary     |
|                                                    |   |        |
| Watson  Wyatt Insurance Consulting Private Ltd          |   | India       |
|                                                    |   |        |
| Watson  Wyatt India Private Limited                     |   | India       |
|                                                    |   |        |
| PT  Watson Wyatt Purbajaga                              |   | Indonesia   |
|                                                    |   |        |
| PT  Watson Wyatt Indonesia                              |   | Indonesia   |
|                                                    |   |        |
| Watson  Wyatt (Ireland) Limited                         |   | Ireland     |
|                                                    |   |        |
| Watson  Wyatt Consulting Limited                        |   | Ireland     |
|                                                    |   |        |
| BCI  Trustees Limited                                   |   | Ireland     |
|                                                    |   |        |
| Watson  Wyatt Italia Srl                                |   | Italy       |
|                                                    |   |        |
| Watson  Wyatt Insurance Consulting KK                   |   | Japan       |

 

2

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| Watson  Wyatt KK                                                                  |   | Japan               |
|-----------------------------------------------------------------------------------|--------|---------------------|
|                                                                              |   |                |
| Watson  Wyatt Insurance Consulting (Korea) Limited                                |   | Korea,  Republic of |
|                                                                              |   |                |
| Watson  Wyatt (Malaysia) Sdn Bhd                                                  |   | Malaysia            |
|                                                                              |   |                |
| Watson  Wyatt Holdings (Mauritius) Limited                                        |   | Mauritius           |
|                                                                              |   |                |
| Watson Wyatt Mexico, S.A. de C.V.                                                 |   | Mexico              |
|                                                                              |   |                |
| Watson  Wyatt European Region BV                                                  |   | Netherlands         |
|                                                                              |   |                |
| Watson  Wyatt Insurance Consulting BV                                             |   | Netherlands         |
|                                                                              |   |                |
| Watson  Wyatt BV                                                                  |   | Netherlands         |
|                                                                              |   |                |
| Watson  Wyatt International, Inc.                                            |   | Nevada              |
|                                                                              |   |                |
| Watson  Wyatt Philippines, Inc.                                              |   | Philippines         |
|                                                                              |   |                |
| Watson Wyatt Puerto Rico, Inc.                                               |   | Puerto  Rico        |
|                                                                              |   |                |
| Watson  Wyatt Insurance Consulting Pte Ltd                                        |   | Singapore           |
|                                                                              |   |                |
| Watson  Wyatt Singapore Pte Ltd                                                   |   | Singapore           |
|                                                                              |   |                |
| Watson  Wyatt Insurance Consulting (Spain) SA                                     |   | Spain               |
|                                                                              |   |                |
| Watson Wyatt de Espana SA                                                         |   | Spain               |
|                                                                              |   |                |
| Watson  Wyatt AB                                                                  |   | Sweden              |
|                                                                              |   |                |
| Watson  Wyatt AG                                                                  |   | Switzerland         |
|                                                                              |   |                |
| Watson  Wyatt (Thailand) Limited                                                  |   | Thailand            |
|                                                                              |   |                |
| Watson  Wyatt Limited                                                             |   | United  Kingdom     |
|                                                                              |   |                |
| Watson  Wyatt Holdings Limited                                                    |   | United  Kingdom     |
|                                                                              |   |                |
| Watson  Wyatt Trustees Limited                                                    |   | United  Kingdom     |
|                                                                              |   |                |
| The  Wyatt Company Holdings Limited                                               |   | United  Kingdom     |
|                                                                              |   |                |
| Watson  Wyatt Services Limited                                                    |   | United  Kingdom     |
|                                                                              |   |                |
| Watson  Wyatt Pretium Limited                                                     |   | United  Kingdom     |
|                                                                              |   |                |
| Watson  Wyatt Holdings (Europe) Limited                                           |   | United  Kingdom     |
|                                                                              |   |                |
| Watson  Wyatt International Limited                                               |   | United  Kingdom     |
|                                                                              |   |                |
| Watson  Wyatt Insurance & Financial Services Consulting Holdings Limited |   | United  Kingdom     |
|                                                                              |   |                |
| Watson  Wyatt European Region Limited                                             |   | United  Kingdom     |
|                                                                              |   |                |
| Watson  Wyatt European Investment Holdings Limited                                |   | United  Kingdom     |

 

3

----

 
| Watsons  Pensioneer Trustees Limited                  |   | United  Kingdom |
|-------------------------------------------------------|--------|-----------------|
|                                                  |   |            |
| Watson  Wyatt (UK) Acquisitions 1 Limited             |   | United  Kingdom |
|                                                  |   |            |
| PCL  Limited                                          |   | United  Kingdom |
|                                                  |   |            |
| PCL  1991 Limited                                     |   | United  Kingdom |
|                                                  |   |            |
| Wyatt  Trustee Limited                                |   | United  Kingdom |
|                                                  |   |            |
| The  Wyatt Company (UK) Limited                       |   | United  Kingdom |
|                                                  |   |            |
| Wyatt  Pension Plan Trustee Limited                   |   | United  Kingdom |
|                                                  |   |            |
| Wyatt  Financial Services Limited                     |   | United  Kingdom |
|                                                  |   |            |
| Watsons  International Limited                        |   | United  Kingdom |
|                                                  |   |            |
| RWS  Trustee Limited                                  |   | United  Kingdom |
|                                                  |   |            |
| Watson  Wyatt Healthcare Trustees Limited             |   | United  Kingdom |
|                                                  |   |            |
| Watson  Wyatt (UK) Acquisitions 2 Limited             |   | United  Kingdom |
|                                                  |   |            |
| Watson  Wyatt European Investment Limited Partnership |   | United  Kingdom |
|                                                  |   |            |
| Watson  Wyatt Uruguay S.A.                            |   | Uruguay         |

 

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(a) Allof these subsidiaries do business under their own name or under the name WatsonWyatt Worldwide.

 

4

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