| January 7, 2016 | Millennium International Management LP | 1.24% | still open |
| January 4, 2016 | Millennium International Management LP | 1.34% | still open |
| December 31, 2015 | Millennium International Management LP | 1.45% | still open |
| December 28, 2015 | Millennium International Management LP | 1.30% | still open |
| December 24, 2015 | Millennium International Management LP | 1.20% | still open |
| December 23, 2015 | Millennium International Management LP | 1.10% | still open |
| December 18, 2015 | Millennium International Management LP | 1.00% | still open |
| December 17, 2015 | Millennium International Management LP | 1.10% | still open |
| December 16, 2015 | Millennium International Management LP | 1.05% | still open |
| December 11, 2015 | Millennium International Management LP | 0.78% | still open |
| December 8, 2015 | Millennium International Management LP | 0.83% | still open |
| December 7, 2015 | Millennium International Management LP | 0.79% | still open |
| December 4, 2015 | Millennium International Management LP | 0.81% | still open |
| December 3, 2015 | Millennium International Management LP | 0.79% | still open |
| December 1, 2015 | Millennium International Management LP | 0.81% | still open |
| November 23, 2015 | Millennium International Management LP | 0.75% | still open |
| November 19, 2015 | Millennium International Management LP | 0.67% | still open |
| November 6, 2015 | Millennium International Management LP | 0.51% | still open |
| November 5, 2015 | Millennium International Management LP | 0.49% | still open |
| November 3, 2015 | Millennium International Management LP | 0.50% | still open |
| October 29, 2015 | Partner Fund Management, L.P. | 0.46% | still open |
| October 27, 2015 | Millennium International Management LP | 0.47% | still open |
| October 23, 2015 | Millennium International Management LP | 0.59% | still open |
| October 22, 2015 | Millennium International Management LP | 0.62% | still open |
| October 21, 2015 | Millennium International Management LP | 0.51% | still open |
| October 16, 2015 | Millennium International Management LP | 0.37% | still open |
| October 8, 2015 | Millennium International Management LP | 1.18% | still open |
| October 6, 2015 | Millennium International Management LP | 1.28% | still open |
| September 29, 2015 | Partner Fund Management, L.P. | 0.69% | still open |
| September 28, 2015 | Partner Fund Management, L.P. | 1.13% | still open |
| September 15, 2015 | Partner Fund Management, L.P. | 1.57% | still open |
| September 10, 2015 | Partner Fund Management, L.P. | 1.44% | still open |
| September 10, 2015 | Pointstate Capital LP | 0.34% | still open |
| August 20, 2015 | Partner Fund Management, L.P. | 1.25% | still open |
| August 20, 2015 | Pointstate Capital LP | 0.57% | still open |
| August 11, 2015 | Partner Fund Management, L.P. | 1.39% | still open |
| August 4, 2015 | Partner Fund Management, L.P. | 1.89% | still open |
| July 27, 2015 | Partner Fund Management, L.P. | 1.78% | still open |
| July 24, 2015 | Partner Fund Management, L.P. | 1.55% | still open |
| July 22, 2015 | Partner Fund Management, L.P. | 1.35% | still open |
| July 20, 2015 | Partner Fund Management, L.P. | 0.92% | still open |
| July 16, 2015 | Partner Fund Management, L.P. | 0.80% | still open |
| July 15, 2015 | Partner Fund Management, L.P. | 0.65% | still open |
| July 7, 2015 | Worldquant LLC | 0.47% | still open |
| June 25, 2015 | Worldquant LLC | 0.52% | still open |
| May 15, 2015 | Healthcor Management, L.P. | 0.47% | still open |
| May 13, 2015 | Healthcor Management, L.P. | 0.58% | still open |
| May 12, 2015 | Healthcor Management, L.P. | 0.69% | still open |
| May 6, 2015 | POINT72 Asset Management, L.P. | 0.44% | still open |
| May 4, 2015 | Healthcor Management, L.P. | 0.86% | still open |