| March 9, 2016 | Henderson Global Investors | 2.42% | still open |
| March 8, 2016 | Blackrock Investment Management (UK) Limited | 1.09% | still open |
| March 4, 2016 | Blackrock Investment Management (UK) Limited | 1.19% | still open |
| March 2, 2016 | Blackrock Investment Management (UK) Limited | 1.26% | still open |
| February 26, 2016 | Henderson Global Investors | 2.28% | still open |
| February 26, 2016 | Blackrock Investment Management (UK) Limited | 1.39% | still open |
| February 19, 2016 | Blackrock Investment Management (UK) Limited | 1.49% | still open |
| February 18, 2016 | Blackrock Investment Management (UK) Limited | 1.56% | still open |
| February 9, 2016 | Blackrock Investment Management (UK) Limited | 1.68% | still open |
| February 4, 2016 | Blackrock Investment Management (UK) Limited | 1.70% | still open |
| January 18, 2016 | Henderson Global Investors | 2.44% | still open |
| January 18, 2016 | Blackrock Investment Management (UK) Limited | 1.61% | still open |
| January 14, 2016 | GLG Partners LP | 0.51% | still open |
| January 13, 2016 | Blackrock Investment Management (UK) Limited | 1.55% | still open |
| January 8, 2016 | Blackrock Investment Management (UK) Limited | 1.40% | still open |
| January 6, 2016 | Blackrock Investment Management (UK) Limited | 1.32% | still open |
| December 18, 2015 | Blackrock Investment Management (UK) Limited | 1.20% | still open |
| December 2, 2015 | Blackrock Investment Management (UK) Limited | 1.19% | still open |
| December 2, 2015 | UBS O'Connor Limited | 0.50% | still open |
| November 30, 2015 | Henderson Global Investors | 2.58% | still open |
| November 30, 2015 | Blackrock Investment Management (UK) Limited | 1.21% | still open |
| November 26, 2015 | Henderson Global Investors | 2.60% | still open |
| November 13, 2015 | GLG Partners LP | 0.44% | still open |
| October 22, 2015 | Blackrock Investment Management (UK) Limited | 1.12% | still open |
| October 22, 2015 | UBS O'Connor Limited | 0.49% | still open |
| October 14, 2015 | Blackrock Investment Management (UK) Limited | 1.09% | still open |
| October 8, 2015 | Blackrock Investment Management (UK) Limited | 1.18% | still open |
| September 25, 2015 | Henderson Global Investors | 2.51% | still open |
| September 23, 2015 | GLG Partners LP | 0.53% | still open |
| September 16, 2015 | UBS O'Connor Limited | 0.51% | still open |
| September 11, 2015 | Henderson Global Investors | 2.43% | still open |
| September 7, 2015 | Blackrock Investment Management (UK) Limited | 1.20% | still open |
| August 28, 2015 | Henderson Global Investors | 2.37% | still open |
| August 24, 2015 | Henderson Global Investors | 2.28% | still open |
| August 12, 2015 | UBS O'Connor Limited | 0.46% | still open |
| August 6, 2015 | Henderson Global Investors | 2.38% | still open |
| July 31, 2015 | UBS O'Connor Limited | 0.50% | still open |
| July 30, 2015 | Henderson Global Investors | 2.47% | still open |
| July 21, 2015 | GLG Partners LP | 0.65% | still open |
| July 14, 2015 | Henderson Global Investors | 2.52% | still open |
| July 9, 2015 | Blackrock Investment Management (UK) Limited | 1.19% | still open |
| June 12, 2015 | Blackrock Investment Management (UK) Limited | 1.29% | still open |
| June 10, 2015 | Blackrock Investment Management (UK) Limited | 1.30% | still open |
| June 8, 2015 | Henderson Global Investors | 2.47% | still open |
| June 5, 2015 | Henderson Global Investors | 2.56% | still open |
| June 5, 2015 | Blackrock Investment Management (UK) Limited | 1.24% | still open |
| June 3, 2015 | Blackrock Investment Management (UK) Limited | 1.12% | still open |
| May 27, 2015 | Henderson Global Investors | 2.62% | still open |
| May 21, 2015 | Henderson Global Investors | 2.52% | still open |
| May 19, 2015 | Henderson Global Investors | 2.40% | still open |