| February 1, 2016 | GSA Capital Partners LLP | 0.49% | still open |
| January 15, 2016 | GSA Capital Partners LLP | 0.59% | still open |
| January 13, 2016 | BlackRock Investment Management (UK) Limited | 0.46% | still open |
| January 7, 2016 | GSA Capital Partners LLP | 0.69% | still open |
| November 23, 2015 | BlackRock Investment Management (UK) Limited | 0.56% | still open |
| November 20, 2015 | BlackRock Investment Management (UK) Limited | 0.60% | still open |
| November 18, 2015 | BlackRock Investment Management (UK) Limited | 0.78% | still open |
| November 17, 2015 | BlackRock Investment Management (UK) Limited | 0.91% | still open |
| November 17, 2015 | GSA Capital Partners LLP | 0.77% | still open |
| November 16, 2015 | BlackRock Investment Management (UK) Limited | 1.21% | still open |
| November 16, 2015 | BlackRock Institutional Trust Company, National Association | 0.44% | still open |
| November 12, 2015 | GSA Capital Partners LLP | 0.80% | still open |
| November 2, 2015 | BlackRock Investment Management (UK) Limited | 1.34% | still open |
| October 30, 2015 | GSA Capital Partners LLP | 0.71% | still open |
| October 16, 2015 | GSA Capital Partners LLP | 0.60% | still open |
| October 1, 2015 | BlackRock Investment Management (UK) Limited | 1.42% | still open |
| September 30, 2015 | GSA Capital Partners LLP | 0.51% | still open |
| September 29, 2015 | BlackRock Investment Management (UK) Limited | 1.36% | still open |
| September 25, 2015 | GSA Capital Partners LLP | 0.48% | still open |
| September 24, 2015 | BlackRock Institutional Trust Company, National Association | 0.50% | still open |
| September 16, 2015 | BlackRock Investment Management (UK) Limited | 1.21% | still open |
| September 11, 2015 | GSA Capital Partners LLP | 0.50% | still open |
| September 8, 2015 | BlackRock Investment Management (UK) Limited | 1.10% | still open |
| August 25, 2015 | BlackRock Investment Management (UK) Limited | 1.00% | still open |
| July 15, 2015 | BlackRock Investment Management (UK) Limited | 0.91% | still open |
| July 8, 2015 | BlackRock Investment Management (UK) Limited | 0.81% | still open |
| July 2, 2015 | BlackRock Investment Management (UK) Limited | 0.72% | still open |
| June 24, 2015 | BlackRock Investment Management (UK) Limited | 0.60% | still open |
| June 17, 2015 | BlackRock Investment Management (UK) Limited | 0.52% | still open |
| May 18, 2015 | JPMorgan Asset Management (UK) Limited | 0.23% | still open |
| April 23, 2015 | JPMorgan Asset Management (UK) Limited | 0.66% | still open |
| April 9, 2015 | Jpmorgan Asset Management (UK) Limited | 0.43% | still open |
| January 29, 2015 | JPMorgan Asset Management (UK) Limited | 0.55% | still open |
| January 22, 2015 | Jpmorgan Asset Management (UK) Limited | 0.43% | still open |
| December 10, 2014 | JPMorgan Asset Management (UK) Limited | 0.54% | still open |
| July 14, 2014 | Whitebox Advisors LLC | 0.49% | still open |
| April 28, 2014 | Whitebox Advisors LLC | 0.55% | still open |
| March 3, 2014 | Silver Point Capital, LP | 0.00% | still open |
| January 31, 2014 | Silver Point Capital, LP | 0.73% | still open |
| January 30, 2014 | Silver Point Capital, LP | 0.59% | still open |
| July 31, 2012 | Highbridge Capital Management LLC | 0.01% | still open |
| April 26, 2012 | Highbridge Capital Management LLC | 0.97% | still open |
| April 5, 2012 | Highbridge Capital Management LLC | 1.09% | still open |
| June 8, 2011 | Highbridge Capital Management LLC | 1.30% | still open |
| March 28, 2011 | Highbridge Capital Management LLC | 1.32% | still open |
| December 13, 2010 | Amber Capital LP | 0.00% | still open |
| December 2, 2010 | Cheyne Capital Management (UK) LLP | 0.00% | still open |
| November 26, 2010 | Cheyne Capital Management (UK) LLP | 0.61% | still open |
| November 25, 2010 | Cheyne Capital Management (UK) LLP | 0.56% | still open |
| November 12, 2010 | Amber Capital LP | 1.62% | still open |
| November 10, 2010 | Amber Capital LP | 1.54% | still open |
| November 10, 2010 | Altair Investment Management Limited | 0.38% | still open |
| November 9, 2010 | Amber Capital LP | 1.36% | still open |
| November 9, 2010 | Altair Investment Management Limited | 0.63% | still open |
| October 11, 2010 | Amber Capital LP | 1.27% | still open |
| September 15, 2010 | Amber Capital LP | 1.33% | still open |
| August 31, 2010 | Amber Capital LP | 1.39% | still open |
| August 30, 2010 | Amber Capital LP | 1.44% | still open |
| August 3, 2010 | Amber Capital LP | 1.30% | still open |
| July 16, 2010 | Amber Capital LP | 1.62% | still open |
| June 16, 2010 | Altair Investment Management Limited | 0.73% | still open |
| June 10, 2010 | Amber Capital LP | 1.57% | still open |
| June 10, 2010 | Altair Investment Management Limited | 0.62% | still open |