| December 23, 2015 | Insight Investment Management (global) LTD | 0.47% | still open |
| December 16, 2015 | Insight Investment Management (global) LTD | 0.59% | still open |
| December 15, 2015 | Insight Investment Management (global) LTD | 0.67% | still open |
| December 9, 2015 | GLG Partners LP | 0.86% | still open |
| December 8, 2015 | GLG Partners LP | 0.91% | still open |
| December 7, 2015 | GLG Partners LP | 0.81% | still open |
| December 4, 2015 | GLG Partners LP | 0.73% | still open |
| December 3, 2015 | GLG Partners LP | 0.61% | still open |
| November 17, 2015 | GLG Partners LP | 0.58% | still open |
| November 5, 2015 | GLG Partners LP | 0.63% | still open |
| November 3, 2015 | GLG Partners LP | 0.42% | still open |
| October 27, 2015 | GLG Partners LP | 0.50% | still open |
| October 1, 2015 | GLG Partners LP | 0.46% | still open |
| September 17, 2015 | GLG Partners LP | 0.57% | still open |
| September 16, 2015 | Insight Investment Management (global) LTD | 0.72% | still open |
| September 11, 2015 | GLG Partners LP | 0.66% | still open |
| August 20, 2015 | GLG Partners LP | 0.58% | still open |
| August 20, 2015 | Blackrock Institutional Trust Company, National Association | 0.49% | still open |
| July 30, 2015 | Blackrock Institutional Trust Company, National Association | 0.59% | still open |
| July 20, 2015 | Insight Investment Management (global) LTD | 0.62% | still open |
| July 10, 2015 | Blackrock Institutional Trust Company, National Association | 0.67% | still open |
| June 22, 2015 | Blackrock Institutional Trust Company, National Association | 0.70% | still open |
| June 4, 2015 | Blackrock Investment Management (UK) Limited | 0.40% | still open |
| June 1, 2015 | Blackrock Institutional Trust Company, National Association | 0.60% | still open |
| May 21, 2015 | Blackrock Institutional Trust Company, National Association | 0.50% | still open |
| May 19, 2015 | Insight Investment Management (global) LTD | 0.51% | still open |
| May 13, 2015 | Blackrock Institutional Trust Company, National Association | 0.49% | still open |
| May 5, 2015 | Blackrock Investment Management (UK) Limited | 0.50% | still open |
| April 30, 2015 | Blackrock Institutional Trust Company, National Association | 0.50% | still open |
| April 15, 2015 | Blackrock Institutional Trust Company, National Association | 0.49% | still open |
| March 31, 2015 | Blackrock Institutional Trust Company, National Association | 0.59% | still open |
| March 27, 2015 | Blackrock Investment Management (UK) Limited | 0.49% | still open |
| March 18, 2015 | Blackrock Institutional Trust Company, National Association | 0.60% | still open |
| March 17, 2015 | Blackrock Institutional Trust Company, National Association | 0.59% | still open |
| March 10, 2015 | Blackrock Institutional Trust Company, National Association | 0.62% | still open |
| February 26, 2015 | Blackrock Investment Management (UK) Limited | 0.51% | still open |
| February 5, 2015 | Blackrock Institutional Trust Company, National Association | 0.50% | still open |
| February 5, 2015 | GLG Partners LP | 0.46% | still open |
| February 3, 2015 | GLG Partners LP | 0.58% | still open |
| February 2, 2015 | GLG Partners LP | 0.64% | still open |
| January 23, 2015 | GLG Partners LP | 0.78% | still open |
| January 22, 2015 | GLG Partners LP | 0.62% | still open |
| December 16, 2014 | Odey Asset Management LLP | 0.35% | still open |
| December 15, 2014 | Odey Asset Management LLP | 0.50% | still open |
| December 3, 2014 | Odey Asset Management LLP | 0.60% | still open |
| November 20, 2014 | Odey Asset Management LLP | 0.52% | still open |
| November 14, 2014 | GLG Partners LP | 0.44% | still open |
| November 12, 2014 | GLG Partners LP | 0.58% | still open |
| November 4, 2014 | GLG Partners LP | 0.62% | still open |
| November 4, 2014 | Blackrock Institutional Trust Company, National Association | 0.49% | still open |