X0306 4 2014-06-16 1 0001070336 ACHILLION PHARMACEUTICALS INC ACHN 0001290166 QVT Associates GP LLC 1177 AVENUE OF THE AMERICAS, 9TH FLOOR NEW YORK NY 10036 0 0 1 0 Common Stock, $0.001 par value 2014-06-16 4 S 0 400751 7.57 D 10287553 I Through QVT Fund IV LP, QVT Fund V LP and Quintessence Fund L.P. Common Stock, $0.001 par value 2014-06-16 4 S 0 100000 7.85 D 10187553 I Through QVT Fund IV LP, QVT Fund V LP and Quintessence Fund L.P. Common Stock, $0.001 par value 2014-06-16 4 S 0 150000 7.81 D 10037553 I Through QVT Fund IV LP, QVT Fund V LP and Quintessence Fund L.P. Common Stock, $0.001 par value 2014-06-16 4 S 0 944400 7.71 D 9093153 I Through QVT Fund IV LP, QVT Fund V LP and Quintessence Fund L.P. Common Stock, $0.001 par value 2014-06-16 4 S 0 224400 7.79 D 8868753 I Through QVT Fund IV LP, QVT Fund V LP and Quintessence Fund L.P. On June 16, 2014, Quintessence Fund L.P. sold 157,999 shares of Common Stock, QVT Fund IV LP sold 240,000 shares of Common Stock and QVT Fund V LP sold 1,421,552 shares of Common Stock. As a result, Quintessence Fund L.P. directly beneficially owns 770,125 shares of Common Stock, QVT Fund IV LP directly beneficially owns 1,169,793 shares of Common Stock and QVT Fund V LP directly beneficially owns 6,928,835 shares of Common Stock. QVT Associates GP LLC is the general partner of QVT Fund IV LP, QVT Fund V LP and Quintessence Fund L.P. (together with QVT Fund IV LP, and QVT Fund V LP, the "Funds"). QVT Financial LP is the investment manager for the Funds and therefore may be deemed the beneficial owner of the Common Stock held by the Funds. QVT Financial GP LLC is the general partner of QVT Financial LP and therefore may be deemed the beneficial owner of Common Stock beneficially owned by QVT Financial LP. The reporting person disclaims beneficial ownership of the reported securities except to the extent of its pecuniary interest therein. /s/ Tracy Fu, Managing Member 2014-06-18