| May 22, 2017 | GSA Capital Partners LLP | 0.00% | still open |
| May 15, 2017 | Kairos Investment Management Limited | 0.00% | still open |
| March 17, 2015 | Kairos Investment Management Limited | 1.60% | still open |
| February 3, 2015 | Kairos Investment Management Limited | 1.87% | still open |
| January 30, 2015 | Kairos Investment Management Limited | 1.91% | still open |
| January 29, 2015 | Kairos Investment Management Limited | 2.01% | still open |
| January 28, 2015 | Kairos Investment Management Limited | 2.14% | still open |
| January 27, 2015 | Kairos Investment Management Limited | 2.27% | still open |
| January 23, 2015 | Kairos Investment Management Limited | 2.55% | still open |
| January 20, 2015 | Kairos Investment Management Limited | 3.01% | still open |
| January 5, 2015 | Kairos Investment Management Limited | 2.92% | still open |
| December 16, 2014 | Oxford Asset Management | 0.45% | still open |
| November 3, 2014 | Kairos Investment Management Limited | 2.83% | still open |
| October 29, 2014 | Kairos Investment Management Limited | 2.71% | still open |
| October 27, 2014 | Kairos Investment Management Limited | 2.64% | still open |
| October 21, 2014 | Kairos Investment Management Limited | 2.54% | still open |
| October 2, 2014 | GSA Capital Partners LLP | 0.50% | still open |
| September 24, 2014 | Kairos Investment Management Limited | 2.47% | still open |
| September 23, 2014 | Kairos Investment Management Limited | 2.36% | still open |
| September 23, 2014 | Oxford Asset Management | 0.51% | still open |
| September 11, 2014 | Kairos Investment Management Limited | 2.22% | still open |
| September 11, 2014 | GSA Capital Partners LLP | 0.47% | still open |
| September 8, 2014 | Kairos Investment Management Limited | 2.15% | still open |
| September 4, 2014 | Kairos Investment Management Limited | 2.03% | still open |
| September 2, 2014 | GSA Capital Partners LLP | 0.51% | still open |
| August 22, 2014 | Kairos Investment Management Limited | 1.92% | still open |
| August 13, 2014 | Kairos Investment Management Limited | 1.68% | still open |
| August 11, 2014 | Kairos Investment Management Limited | 1.17% | still open |
| July 28, 2014 | Kairos Investment Management Limited | 1.00% | still open |
| July 24, 2014 | Kairos Investment Management Limited | 0.93% | still open |
| July 18, 2014 | Kairos Investment Management Limited | 0.80% | still open |
| July 9, 2014 | Kairos Investment Management Limited | 0.72% | still open |
| July 8, 2014 | Kairos Investment Management Limited | 0.67% | still open |
| July 3, 2014 | Kairos Investment Management Limited | 0.55% | still open |
| May 29, 2014 | Kairos Investment Management Limited | 0.00% | still open |
| May 16, 2014 | Kairos Investment Management Limited | 0.96% | still open |
| May 15, 2014 | Kairos Investment Management Limited | 1.00% | still open |
| May 9, 2014 | Kairos Investment Management Limited | 1.18% | still open |
| April 22, 2014 | Kairos Investment Management Limited | 1.27% | still open |
| April 17, 2014 | Kairos Investment Management Limited | 1.16% | still open |
| April 15, 2014 | Kairos Investment Management Limited | 1.01% | still open |
| April 14, 2014 | Kairos Investment Management Limited | 0.78% | still open |
| April 11, 2014 | Kairos Investment Management Limited | 0.96% | still open |
| April 10, 2014 | Kairos Investment Management Limited | 0.86% | still open |
| April 9, 2014 | Kairos Investment Management Limited | 0.51% | still open |
| January 6, 2014 | Oxford Asset Management | 0.47% | still open |
| December 12, 2013 | Oxford Asset Management | 0.50% | still open |
| December 10, 2013 | Oxford Asset Management | 0.49% | still open |
| December 9, 2013 | Oxford Asset Management | 0.50% | still open |
| December 5, 2013 | Oxford Asset Management | 0.49% | still open |
| October 31, 2013 | Oxford Asset Management | 0.50% | still open |
| December 28, 2012 | Exane SA | 0.00% | still open |
| December 28, 2012 | Mediobanca - Banca di Credito Finanziario S.p.A. | 0.00% | still open |
| December 27, 2012 | Exane SA | 0.97% | still open |
| December 21, 2012 | Exane SA | 0.71% | still open |
| December 17, 2012 | Mediobanca - Banca di Credito Finanziario S.p.A. | 0.64% | still open |
| December 12, 2012 | Mediobanca - Banca di Credito Finanziario S.p.A. | 0.51% | still open |