| August 23, 2018 | Contour Asset Management | 0.49% | still open |
| June 14, 2018 | Contour Asset Management | 0.50% | still open |
| June 2, 2017 | Blackrock Investment Management (UK) Limited | 0.40% | still open |
| May 12, 2017 | Blackrock Investment Management (UK) Limited | 0.59% | still open |
| May 5, 2017 | Blackrock Investment Management (UK) Limited | 0.60% | still open |
| April 25, 2017 | Blackrock Investment Management (UK) Limited | 0.59% | still open |
| April 5, 2017 | Blackrock Investment Management (UK) Limited | 0.67% | still open |
| March 29, 2017 | Blackrock Investment Management (UK) Limited | 0.79% | still open |
| March 9, 2017 | Blackrock Investment Management (UK) Limited | 0.80% | still open |
| February 6, 2017 | Blackrock Investment Management (UK) Limited | 0.71% | still open |
| January 31, 2017 | Blackrock Investment Management (UK) Limited | 0.60% | still open |
| January 11, 2017 | Blackrock Investment Management (UK) Limited | 0.50% | still open |
| December 14, 2016 | Blackrock Investment Management (UK) Limited | 0.47% | still open |
| December 8, 2016 | Blackrock Investment Management (UK) Limited | 0.59% | still open |
| December 7, 2016 | Blackrock Investment Management (UK) Limited | 0.60% | still open |
| December 6, 2016 | GAM Investment Management (switzerland) AG | 0.49% | still open |
| November 28, 2016 | Blackrock Investment Management (UK) Limited | 0.50% | still open |
| January 28, 2016 | GAM Investment Management (switzerland) AG | 0.50% | still open |
| December 11, 2015 | GAM Investment Management (switzerland) AG | 0.46% | still open |
| October 29, 2015 | GAM Investment Management (switzerland) AG | 0.50% | still open |
| January 20, 2015 | Cadian Capital Management LLC | 0.48% | still open |
| January 14, 2015 | Cadian Capital Management LLC | 0.57% | still open |
| January 9, 2015 | Cadian Capital Management LLC | 0.67% | still open |
| December 16, 2014 | Cadian Capital Management LLC | 0.71% | still open |
| December 9, 2014 | Cadian Capital Management LLC | 0.60% | still open |
| November 25, 2014 | Cadian Capital Management LLC | 0.59% | still open |
| November 20, 2014 | Cadian Capital Management LLC | 0.68% | still open |
| November 17, 2014 | Cadian Capital Management LLC | 0.79% | still open |
| November 14, 2014 | Cadian Capital Management LLC | 0.88% | still open |
| October 15, 2014 | Cadian Capital Management LLC | 0.93% | still open |
| October 7, 2014 | Cadian Capital Management LLC | 0.80% | still open |
| September 18, 2014 | Cadian Capital Management LLC | 0.79% | still open |
| June 2, 2014 | Cadian Capital Management LLC | 0.89% | still open |
| May 23, 2014 | Cadian Capital Management LLC | 0.98% | still open |
| May 7, 2014 | Cadian Capital Management LLC | 1.09% | still open |
| April 29, 2014 | Cadian Capital Management LLC | 1.18% | still open |
| April 7, 2014 | Cadian Capital Management LLC | 1.20% | still open |
| March 6, 2014 | Cadian Capital Management LLC | 1.18% | still open |
| February 13, 2014 | Cadian Capital Management LLC | 1.20% | still open |
| January 24, 2014 | Cadian Capital Management LLC | 1.10% | still open |
| January 9, 2014 | Cadian Capital Management LLC | 1.09% | still open |
| January 3, 2014 | Cadian Capital Management LLC | 1.16% | still open |