| April 28, 2015 | Worldquant, LLC | 0.71% | still open |
| April 27, 2015 | Millennium International Management LP | 0.39% | still open |
| April 23, 2015 | Worldquant, LLC | 0.66% | still open |
| April 23, 2015 | Millennium International Management LP | 0.56% | still open |
| April 22, 2015 | Millennium International Management LP | 0.64% | still open |
| April 22, 2015 | Worldquant, LLC | 0.58% | still open |
| April 21, 2015 | Millennium International Management LP | 0.97% | still open |
| April 21, 2015 | Bluecrest Capital Management Limited | 0.60% | still open |
| April 20, 2015 | Millennium International Management LP | 1.13% | still open |
| April 17, 2015 | Oxford Asset Management | 0.62% | still open |
| April 16, 2015 | Millennium International Management LP | 1.27% | still open |
| April 15, 2015 | Millennium International Management LP | 1.38% | still open |
| April 14, 2015 | Millennium International Management LP | 1.63% | still open |
| April 9, 2015 | Bluecrest Capital Management Limited | 0.50% | still open |
| April 8, 2015 | Adage Capital Management L.P. | 0.36% | still open |
| April 7, 2015 | Millennium International Management LP | 1.57% | still open |
| April 7, 2015 | Adage Capital Management L.P. | 0.55% | still open |
| April 7, 2015 | Marshall Wace LLP | 0.47% | still open |
| April 2, 2015 | Bluecrest Capital Management Limited | 0.50% | still open |
| April 1, 2015 | Millennium International Management LP | 1.60% | still open |
| April 1, 2015 | Adage Capital Management L.P. | 0.64% | still open |
| March 30, 2015 | Millennium International Management LP | 1.50% | still open |
| March 30, 2015 | Marshall Wace LLP | 0.50% | still open |
| March 30, 2015 | Oxford Asset Management | 0.50% | still open |
| March 27, 2015 | Adage Capital Management L.P. | 0.74% | still open |
| March 26, 2015 | Millennium International Management LP | 1.67% | still open |
| March 25, 2015 | Millennium International Management LP | 2.02% | still open |
| March 24, 2015 | Millennium International Management LP | 2.18% | still open |
| March 18, 2015 | Millennium International Management LP | 2.23% | still open |
| March 11, 2015 | Millennium International Management LP | 2.11% | still open |
| March 5, 2015 | Bluecrest Capital Management Limited | 0.50% | still open |
| February 12, 2015 | Millennium International Management LP | 2.09% | still open |
| February 5, 2015 | Millennium International Management LP | 2.11% | still open |
| January 21, 2015 | Millennium International Management LP | 2.03% | still open |
| January 20, 2015 | Millennium International Management LP | 1.93% | still open |
| January 16, 2015 | Millennium International Management LP | 1.85% | still open |
| January 14, 2015 | Millennium International Management LP | 1.75% | still open |
| January 9, 2015 | Millennium International Management LP | 1.60% | still open |
| January 5, 2015 | Millennium International Management LP | 1.53% | still open |
| December 30, 2014 | Millennium International Management LP | 1.48% | still open |
| December 29, 2014 | Millennium International Management LP | 1.50% | still open |
| December 15, 2014 | Millennium International Management LP | 1.40% | still open |
| December 12, 2014 | Millennium International Management LP | 1.35% | still open |
| December 10, 2014 | Millennium International Management LP | 1.23% | still open |
| December 8, 2014 | Millennium International Management LP | 1.12% | still open |
| December 5, 2014 | Millennium International Management LP | 1.09% | still open |
| December 4, 2014 | Millennium International Management LP | 0.96% | still open |
| December 3, 2014 | Millennium International Management LP | 0.76% | still open |
| December 1, 2014 | Millennium International Management LP | 0.66% | still open |
| November 27, 2014 | Millennium International Management LP | 0.54% | still open |