[From SEC Form DEF14a filed on 4/25/08. The holdings by NVS and JP Sommadossi are current; the holding of MPM Capital is as of 12/31/07 (end of the most recently reported quarter.]
Shares Stake
Novartis 31,295,870 55.6% MPM Capital 3,243,306 5.8% JP Sommadossi, CEO 2,329,754 4.8%
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