| February 18, 2020 | Squarepoint OPS LLC | 0.88% | still open |
| February 18, 2020 | Citadel Advisors LLC | 0.51% | still open |
| February 14, 2020 | Blackrock Institutional Trust Company, National Association | 0.99% | still open |
| February 12, 2020 | KEY Group Holdings (cayman), LTD. | 1.29% | still open |
| February 10, 2020 | Squarepoint OPS LLC | 0.50% | still open |
| February 7, 2020 | KEY Group Holdings (cayman), LTD. | 1.16% | still open |
| February 4, 2020 | Blackrock Institutional Trust Company, National Association | 1.04% | still open |
| February 3, 2020 | Blackrock Institutional Trust Company, National Association | 0.90% | still open |
| January 31, 2020 | Blackrock Institutional Trust Company, National Association | 0.87% | still open |
| January 23, 2020 | KEY Group Holdings (cayman), LTD. | 1.21% | still open |
| January 23, 2020 | Odey Asset Management LLP | 0.87% | still open |
| January 22, 2020 | KEY Group Holdings (cayman), LTD. | 0.99% | still open |
| January 21, 2020 | KEY Group Holdings (cayman), LTD. | 0.89% | still open |
| January 20, 2020 | Blackrock Institutional Trust Company, National Association | 0.73% | still open |
| January 17, 2020 | KEY Group Holdings (cayman), LTD. | 0.79% | still open |
| January 15, 2020 | KEY Group Holdings (cayman), LTD. | 0.80% | still open |
| January 7, 2020 | KEY Group Holdings (cayman), LTD. | 0.69% | still open |
| January 3, 2020 | Blackrock Institutional Trust Company, National Association | 0.62% | still open |
| January 2, 2020 | KEY Group Holdings (cayman), LTD. | 0.70% | still open |
| December 18, 2019 | Blackrock Institutional Trust Company, National Association | 0.53% | still open |
| December 11, 2019 | KEY Group Holdings (cayman), LTD. | 0.59% | still open |
| December 9, 2019 | KEY Group Holdings (cayman), LTD. | 0.65% | still open |
| August 6, 2019 | Odey Asset Management LLP | 0.39% | still open |
| August 1, 2019 | Odey Asset Management LLP | 0.60% | still open |
| June 24, 2019 | Odey Asset Management LLP | 0.55% | still open |
| May 13, 2019 | KEY Group Holdings (cayman), LTD. | 0.47% | still open |
| May 8, 2019 | KEY Group Holdings (cayman), LTD. | 0.59% | still open |
| April 9, 2019 | KEY Group Holdings (cayman), LTD. | 0.68% | still open |
| April 5, 2019 | KEY Group Holdings (cayman), LTD. | 0.73% | still open |
| March 27, 2019 | KEY Group Holdings (cayman), LTD. | 0.88% | still open |
| March 25, 2019 | KEY Group Holdings (cayman), LTD. | 0.98% | still open |
| March 21, 2019 | KEY Group Holdings (cayman), LTD. | 1.09% | still open |
| February 19, 2019 | Millennium International Management LP | 0.49% | still open |
| February 12, 2019 | KEY Group Holdings (cayman), LTD. | 1.17% | still open |
| February 11, 2019 | KEY Group Holdings (cayman), LTD. | 1.23% | still open |
| February 8, 2019 | Millennium International Management LP | 0.59% | still open |
| February 7, 2019 | KEY Group Holdings (cayman), LTD. | 1.35% | still open |
| February 5, 2019 | Millennium International Management LP | 0.61% | still open |
| January 22, 2019 | Millennium International Management LP | 0.59% | still open |
| January 16, 2019 | KEY Group Holdings (cayman), LTD. | 1.48% | still open |
| January 8, 2019 | KEY Group Holdings (cayman), LTD. | 1.58% | still open |
| January 8, 2019 | Millennium International Management LP | 0.69% | still open |
| December 27, 2018 | KEY Group Holdings (cayman), LTD. | 1.61% | still open |
| December 13, 2018 | Millennium International Management LP | 0.71% | still open |
| December 11, 2018 | Linden Advisors LP | 0.48% | still open |
| December 6, 2018 | Millennium International Management LP | 0.60% | still open |
| December 5, 2018 | Millennium International Management LP | 0.59% | still open |
| November 27, 2018 | KEY Group Holdings (cayman), LTD. | 1.58% | still open |
| November 26, 2018 | KEY Group Holdings (cayman), LTD. | 1.49% | still open |
| November 23, 2018 | Millennium International Management LP | 0.60% | still open |