Exhibit 21
SUBSIDIARIES OF MILLENNIUM PHARMACEUTICALS, INC.
| Name of Subsidiary | 
 | Jurisdiction of Organization | 
| 
 | 
 | 
 | 
| Millennium Pharmaceuticals Research | 
 | 
 | 
| and Development, Ltd. | 
 | United Kingdom | 
| 
 | 
 | 
 | 
| Millennium Pharmaceuticals, Ltd. | 
 | United Kingdom |