| February 21, 2018 | Blackrock Investment Management (UK) Limited | 0.96% | still open |
| February 14, 2018 | Blackrock Institutional Trust Company, National Association | 0.50% | still open |
| February 8, 2018 | Blackrock Investment Management (UK) Limited | 0.83% | still open |
| February 2, 2018 | Blackrock Investment Management (UK) Limited | 0.73% | still open |
| January 26, 2018 | Blackrock Investment Management (UK) Limited | 0.61% | still open |
| January 16, 2018 | Blackrock Investment Management (UK) Limited | 0.50% | still open |
| November 21, 2017 | Merian Global Investors (UK) Limited | 0.48% | still open |
| August 7, 2017 | Merian Global Investors (UK) Limited | 0.57% | still open |
| April 4, 2017 | Ennismore Fund Management Limited | 0.25% | still open |
| March 30, 2017 | Ennismore Fund Management Limited | 0.54% | still open |
| March 27, 2017 | Ennismore Fund Management Limited | 0.67% | still open |
| October 18, 2016 | Ennismore Fund Management Limited | 0.73% | still open |
| April 14, 2016 | Parvus Asset Management Europe Limited | 0.00% | still open |
| March 24, 2016 | Parvus Asset Management Europe Limited | 1.50% | still open |
| March 17, 2016 | Parvus Asset Management Europe Limited | 1.63% | still open |
| March 7, 2016 | Parvus Asset Management Europe Limited | 1.76% | still open |
| February 9, 2016 | Parvus Asset Management Europe Limited | 1.89% | still open |
| February 8, 2016 | Parvus Asset Management Europe Limited | 1.90% | still open |
| December 2, 2015 | Parvus Asset Management Europe Limited | 2.00% | still open |
| December 1, 2015 | Parvus Asset Management Europe Limited | 1.99% | still open |
| October 13, 2015 | Parvus Asset Management Europe Limited | 1.71% | still open |
| October 6, 2015 | Parvus Asset Management Europe Limited | 1.65% | still open |
| October 1, 2015 | Parvus Asset Management Europe Limited | 1.50% | still open |
| September 29, 2015 | Parvus Asset Management Europe Limited | 1.43% | still open |
| September 28, 2015 | Parvus Asset Management Europe Limited | 1.33% | still open |
| September 24, 2015 | Parvus Asset Management Europe Limited | 1.26% | still open |
| September 18, 2015 | Parvus Asset Management Europe Limited | 1.14% | still open |
| September 17, 2015 | Parvus Asset Management Europe Limited | 1.00% | still open |
| September 11, 2015 | Parvus Asset Management Europe Limited | 0.94% | still open |
| September 4, 2015 | Parvus Asset Management Europe Limited | 0.72% | still open |
| September 2, 2015 | Parvus Asset Management Europe Limited | 0.57% | still open |
| April 10, 2014 | GSA Capital Partners LLP | 0.46% | still open |
| April 9, 2014 | GSA Capital Partners LLP | 0.50% | still open |
| January 7, 2014 | Blackrock Institutional Trust Company, National Association | 0.45% | still open |
| November 6, 2013 | Sierra Global Management, LLC | 0.00% | still open |
| November 1, 2013 | Sierra Global Management, LLC | 0.57% | still open |
| September 18, 2013 | Blackrock Institutional Trust Company, National Association | 0.50% | still open |
| September 17, 2013 | Alphagen Capital Limited | 0.39% | still open |
| September 5, 2013 | Sierra Global Management, LLC | 0.46% | still open |
| September 3, 2013 | Sierra Global Management, LLC | 0.57% | still open |
| September 3, 2013 | Alphagen Capital Limited | 0.50% | still open |
| August 7, 2013 | Alphagen Capital Limited | 0.47% | still open |
| August 1, 2013 | Alphagen Capital Limited | 0.56% | still open |
| July 30, 2013 | Alphagen Capital Limited | 0.69% | still open |
| July 25, 2013 | Alphagen Capital Limited | 0.77% | still open |
| July 22, 2013 | Barrington Wilshire LLC | 0.42% | still open |
| July 18, 2013 | Barrington Wilshire LLC | 0.73% | still open |
| July 11, 2013 | Barrington Wilshire LLC | 0.90% | still open |
| July 1, 2013 | Sierra Global Management, LLC | 0.48% | still open |
| June 25, 2013 | Barrington Wilshire LLC | 0.94% | still open |