| October 10, 2017 | KEY Group Holdings (cayman), LTD. | 0.00% | still open |
| October 10, 2017 | Psquared Asset Management AG | 0.00% | still open |
| September 19, 2017 | KEY Group Holdings (cayman), LTD. | 0.96% | still open |
| September 6, 2017 | KEY Group Holdings (cayman), LTD. | 1.09% | still open |
| August 9, 2017 | Millennium International Management LP | 0.47% | still open |
| August 3, 2017 | Millennium International Management LP | 0.58% | still open |
| July 31, 2017 | Millennium International Management LP | 0.68% | still open |
| July 26, 2017 | MVN Asset Management Limited | 0.49% | still open |
| July 17, 2017 | MVN Asset Management Limited | 0.55% | still open |
| July 14, 2017 | Psquared Asset Management AG | 0.54% | still open |
| July 13, 2017 | Millennium International Management LP | 0.71% | still open |
| July 12, 2017 | KEY Group Holdings (cayman), LTD. | 1.16% | still open |
| July 12, 2017 | Bluecrest Capital Management Limited | 0.43% | still open |
| July 12, 2017 | Schroder Investment Management Limited | 0.26% | still open |
| July 10, 2017 | Millennium International Management LP | 0.60% | still open |
| July 7, 2017 | Millennium International Management LP | 0.59% | still open |
| July 6, 2017 | Bluecrest Capital Management Limited | 0.51% | still open |
| July 4, 2017 | Millennium International Management LP | 0.66% | still open |
| July 3, 2017 | Millennium International Management LP | 0.70% | still open |
| June 23, 2017 | Millennium International Management LP | 0.61% | still open |
| June 21, 2017 | Schroder Investment Management Limited | 0.70% | still open |
| June 21, 2017 | Millennium International Management LP | 0.50% | still open |
| June 20, 2017 | Schroder Investment Management Limited | 0.66% | still open |
| June 16, 2017 | Schroder Investment Management Limited | 0.52% | still open |
| June 15, 2017 | Blackrock Investment Management (UK) Limited | 0.48% | still open |
| May 26, 2017 | KEY Group Holdings (cayman), LTD. | 0.80% | still open |
| May 25, 2017 | KEY Group Holdings (cayman), LTD. | 0.69% | still open |
| May 25, 2017 | Blackrock Investment Management (UK) Limited | 0.54% | still open |
| May 24, 2017 | KEY Group Holdings (cayman), LTD. | 0.59% | still open |
| May 18, 2017 | KEY Group Holdings (cayman), LTD. | 0.68% | still open |
| May 5, 2017 | KEY Group Holdings (cayman), LTD. | 0.74% | still open |
| April 12, 2017 | Blackrock Investment Management (UK) Limited | 0.60% | still open |
| March 23, 2017 | Blackrock Investment Management (UK) Limited | 0.59% | still open |
| March 17, 2017 | Millennium International Management LP | 0.37% | still open |
| March 14, 2017 | Millennium International Management LP | 0.89% | still open |
| March 13, 2017 | Millennium International Management LP | 1.03% | still open |
| March 13, 2017 | KEY Group Holdings (cayman), LTD. | 0.69% | still open |
| March 13, 2017 | GLG Partners LP | 0.41% | still open |
| March 10, 2017 | GLG Partners LP | 0.69% | still open |
| March 7, 2017 | Millennium International Management LP | 1.41% | still open |
| March 7, 2017 | GLG Partners LP | 0.73% | still open |
| March 3, 2017 | GLG Partners LP | 0.80% | still open |
| March 2, 2017 | Millennium International Management LP | 1.31% | still open |
| February 28, 2017 | GLG Partners LP | 0.72% | still open |
| February 27, 2017 | Millennium International Management LP | 1.29% | still open |
| February 23, 2017 | Millennium International Management LP | 1.38% | still open |
| February 23, 2017 | GLG Partners LP | 0.63% | still open |
| February 20, 2017 | Millennium International Management LP | 1.49% | still open |
| February 16, 2017 | Millennium International Management LP | 1.51% | still open |
| February 16, 2017 | Blackrock Investment Management (UK) Limited | 0.60% | still open |