| May 31, 2016 | Oceanic Investment Management Limited | 0.79% | still open |
| May 27, 2016 | Oceanic Investment Management Limited | 0.84% | still open |
| May 25, 2016 | Oceanic Investment Management Limited | 0.96% | still open |
| May 3, 2016 | Bodenholm Capital AB | 0.37% | still open |
| April 29, 2016 | Bodenholm Capital AB | 0.52% | still open |
| April 28, 2016 | Bodenholm Capital AB | 0.81% | still open |
| April 27, 2016 | Bodenholm Capital AB | 0.73% | still open |
| April 25, 2016 | Adelphi Capital LLP | 1.66% | still open |
| April 22, 2016 | Adelphi Capital LLP | 1.74% | still open |
| April 21, 2016 | Adelphi Capital LLP | 1.84% | still open |
| April 8, 2016 | Bodenholm Capital AB | 0.68% | still open |
| March 31, 2016 | Blackrock Investment Management (UK) Limited | 0.44% | still open |
| March 30, 2016 | Blackrock Investment Management (UK) Limited | 0.59% | still open |
| March 24, 2016 | Blackrock Investment Management (UK) Limited | 0.67% | still open |
| March 23, 2016 | Blackrock Investment Management (UK) Limited | 0.71% | still open |
| March 21, 2016 | Blackrock Investment Management (UK) Limited | 0.89% | still open |
| March 17, 2016 | Blackrock Investment Management (UK) Limited | 0.97% | still open |
| March 11, 2016 | Blackrock Investment Management (UK) Limited | 1.04% | still open |
| March 10, 2016 | Blackrock Investment Management (UK) Limited | 0.98% | still open |
| March 9, 2016 | Blackrock Investment Management (UK) Limited | 0.87% | still open |
| March 8, 2016 | Oceanic Investment Management Limited | 1.07% | still open |
| February 29, 2016 | Oceanic Investment Management Limited | 1.31% | still open |
| February 26, 2016 | Oceanic Investment Management Limited | 1.12% | still open |
| February 10, 2016 | Blackrock Investment Management (UK) Limited | 0.96% | still open |
| February 10, 2016 | Adage Capital Management L.P. | 0.45% | still open |
| February 8, 2016 | Adage Capital Management L.P. | 0.53% | still open |
| February 3, 2016 | Adage Capital Management L.P. | 0.76% | still open |
| February 2, 2016 | Blackrock Investment Management (UK) Limited | 0.70% | still open |
| February 1, 2016 | Blackrock Investment Management (UK) Limited | 0.56% | still open |
| January 26, 2016 | Adelphi Capital LLP | 2.14% | still open |
| January 22, 2016 | Oceanic Investment Management Limited | 0.92% | still open |
| January 21, 2016 | Oceanic Investment Management Limited | 0.83% | still open |
| January 20, 2016 | Oceanic Investment Management Limited | 0.73% | still open |
| January 18, 2016 | Oceanic Investment Management Limited | 0.63% | still open |
| January 14, 2016 | Oceanic Investment Management Limited | 0.52% | still open |
| January 13, 2016 | Adage Capital Management L.P. | 0.76% | still open |
| January 5, 2016 | Adelphi Capital LLP | 1.68% | still open |
| December 18, 2015 | Oceanic Investment Management Limited | 0.47% | still open |
| December 15, 2015 | Adelphi Capital LLP | 1.23% | still open |
| December 14, 2015 | Adelphi Capital LLP | 1.12% | still open |
| December 11, 2015 | Adelphi Capital LLP | 1.05% | still open |
| December 10, 2015 | Adelphi Capital LLP | 0.72% | still open |
| December 9, 2015 | Adelphi Capital LLP | 0.54% | still open |
| December 9, 2015 | AQR Capital Management, LLC | 0.49% | still open |
| December 3, 2015 | Oceanic Investment Management Limited | 0.59% | still open |
| November 17, 2015 | Adage Capital Management L.P. | 0.80% | still open |
| October 27, 2015 | Oceanic Investment Management Limited | 0.63% | still open |
| October 26, 2015 | Adage Capital Management L.P. | 0.70% | still open |
| October 26, 2015 | AQR Capital Management, LLC | 0.59% | still open |
| October 21, 2015 | Adage Capital Management L.P. | 0.62% | still open |