| February 26, 2014 | Alphagen Capital Limited | 0.95% | still open |
| February 24, 2014 | Blackrock Investment Management (UK) Limited | 0.99% | still open |
| February 20, 2014 | Alphagen Capital Limited | 1.13% | still open |
| February 19, 2014 | Blackrock Investment Management (UK) Limited | 1.03% | still open |
| February 12, 2014 | Blackrock Investment Management (UK) Limited | 1.19% | still open |
| February 6, 2014 | Alphagen Capital Limited | 1.30% | still open |
| February 5, 2014 | Blackrock Investment Management (UK) Limited | 1.27% | still open |
| February 4, 2014 | Alphagen Capital Limited | 1.29% | still open |
| January 31, 2014 | Alphagen Capital Limited | 1.30% | still open |
| January 29, 2014 | Blackrock Investment Management (UK) Limited | 1.39% | still open |
| January 29, 2014 | Alphagen Capital Limited | 1.23% | still open |
| January 28, 2014 | Alphagen Capital Limited | 1.18% | still open |
| January 23, 2014 | Alphagen Capital Limited | 1.22% | still open |
| January 21, 2014 | Blackrock Investment Management (UK) Limited | 1.43% | still open |
| January 15, 2014 | Alphagen Capital Limited | 1.18% | still open |
| January 14, 2014 | Alphagen Capital Limited | 1.25% | still open |
| January 9, 2014 | Blackrock Investment Management (UK) Limited | 1.50% | still open |
| January 9, 2014 | Alphagen Capital Limited | 1.32% | still open |
| January 9, 2014 | Jpmorgan Asset Management (UK) LTD | 0.31% | still open |
| January 3, 2014 | Blackrock Investment Management (UK) Limited | 1.67% | still open |
| January 3, 2014 | Alphagen Capital Limited | 1.20% | still open |
| December 20, 2013 | Alphagen Capital Limited | 1.13% | still open |
| December 20, 2013 | Jpmorgan Asset Management (UK) LTD | 0.51% | still open |
| November 27, 2013 | Alphagen Capital Limited | 1.30% | still open |
| November 26, 2013 | Jpmorgan Asset Management (UK) LTD | 0.69% | still open |
| October 18, 2013 | Alphagen Capital Limited | 1.20% | still open |
| October 10, 2013 | Blackrock Investment Management (UK) Limited | 1.72% | still open |
| October 9, 2013 | Blackrock Investment Management (UK) Limited | 1.80% | still open |
| October 9, 2013 | Alphagen Capital Limited | 1.16% | still open |
| October 4, 2013 | Alphagen Capital Limited | 1.04% | still open |
| October 2, 2013 | Cazenove Capital Management Limited | 0.70% | still open |
| September 20, 2013 | Alphagen Capital Limited | 0.94% | still open |
| September 16, 2013 | Alphagen Capital Limited | 0.80% | still open |
| September 11, 2013 | Blackrock Investment Management (UK) Limited | 1.98% | still open |
| September 10, 2013 | Blackrock Investment Management (UK) Limited | 2.04% | still open |
| August 19, 2013 | Blackrock Investment Management (UK) Limited | 2.12% | still open |
| August 19, 2013 | Alphagen Capital Limited | 0.64% | still open |
| August 12, 2013 | Blackrock Investment Management (UK) Limited | 2.01% | still open |
| August 9, 2013 | Jpmorgan Asset Management (UK) LTD | 0.79% | still open |
| August 8, 2013 | Blackrock Investment Management (UK) Limited | 1.92% | still open |
| August 8, 2013 | Jpmorgan Asset Management (UK) LTD | 0.62% | still open |
| August 8, 2013 | Alphagen Capital Limited | 0.54% | still open |
| August 6, 2013 | Jpmorgan Asset Management (UK) LTD | 0.57% | still open |
| August 6, 2013 | Alphagen Capital Limited | 0.47% | still open |
| August 1, 2013 | Alphagen Capital Limited | 0.73% | still open |
| July 29, 2013 | Alphagen Capital Limited | 0.61% | still open |
| July 25, 2013 | Cazenove Capital Management Limited | 0.50% | still open |
| July 18, 2013 | Blackrock Investment Management (UK) Limited | 1.84% | still open |
| June 14, 2013 | Odey Asset Management LLP | 0.50% | still open |
| May 16, 2013 | Blackrock Investment Management (UK) Limited | 1.79% | still open |