| date | notes |
|---|---|
| 22 Jun 1990 | |
| June | S. Tamura and T. Nakamura incorporated Sosei |
| 1991-1999 | |
| Established globally recognised technology transfer business | |
| 1999 | |
| Mar | Started the Drug Reprofiling Platform®(DRP®) project. |
| 2001 | |
| April | In-licensed Norlevo® from Laboratoire HRA Pharma. |
| 2002 | |
| September | Established Sosei London office. |
| 2004 | |
| July | Listed on the MOTHERS index of Tokyo Stock Exchange (code:4565). |
| 2005 | |
| August | Acquisition of Arakis Ltd.(now Sosei R&D Ltd.) |
| 2006 | |
| October | Reorganisation under a holding company structure |
