| August 26, 2015 | Marshall Wace LLP | 0.81% | still open |
| August 24, 2015 | Marshall Wace LLP | 0.73% | still open |
| August 19, 2015 | Marshall Wace LLP | 0.69% | still open |
| August 7, 2015 | Marshall Wace LLP | 0.80% | still open |
| August 6, 2015 | Marshall Wace LLP | 0.78% | still open |
| August 5, 2015 | Marshall Wace LLP | 0.68% | still open |
| August 4, 2015 | Marshall Wace LLP | 0.54% | still open |
| June 26, 2015 | Weiss Asset Management LP | 0.00% | still open |
| June 19, 2015 | Weiss Asset Management LP | 1.21% | still open |
| June 18, 2015 | Weiss Asset Management LP | 0.94% | still open |
| June 17, 2015 | Weiss Asset Management LP | 0.69% | still open |
| June 9, 2015 | Marshall Wace LLP | 0.47% | still open |
| May 22, 2015 | Marshall Wace LLP | 0.52% | still open |
| July 7, 2014 | Susquehanna International Holdings LLC | 0.09% | still open |
| July 7, 2014 | Mediobanca - Banca di Credito Finanziario S.p.A. | 0.00% | still open |
| July 7, 2014 | Polygon Global Partners LLP | 0.00% | still open |
| July 7, 2014 | Tetragon Partners UK LLP | 0.00% | still open |
| July 4, 2014 | Susquehanna International Holdings LLC | 1.19% | still open |
| July 3, 2014 | Susquehanna International Holdings LLC | 1.20% | still open |
| June 27, 2014 | Mediobanca - Banca di Credito Finanziario S.p.A. | 6.25% | still open |
| June 27, 2014 | Susquehanna International Holdings LLC | 1.12% | still open |
| June 27, 2014 | Polygon Global Partners LLP | 0.56% | still open |
| June 27, 2014 | Tetragon Partners UK LLP | 0.56% | still open |
| June 26, 2014 | Mediobanca - Banca di Credito Finanziario S.p.A. | 4.71% | still open |
| June 26, 2014 | Susquehanna International Holdings LLC | 1.05% | still open |
| June 25, 2014 | Mediobanca - Banca di Credito Finanziario S.p.A. | 3.95% | still open |
| June 25, 2014 | Susquehanna International Holdings LLC | 0.93% | still open |
| June 24, 2014 | Mediobanca - Banca di Credito Finanziario S.p.A. | 3.30% | still open |
| June 24, 2014 | Susquehanna International Holdings LLC | 0.75% | still open |
| June 23, 2014 | Mediobanca - Banca di Credito Finanziario S.p.A. | 2.92% | still open |
| June 20, 2014 | Mediobanca - Banca di Credito Finanziario S.p.A. | 2.28% | still open |
| June 18, 2014 | Mediobanca - Banca di Credito Finanziario S.p.A. | 1.96% | still open |
| June 17, 2014 | Mediobanca - Banca di Credito Finanziario S.p.A. | 1.47% | still open |
| June 17, 2014 | Susquehanna International Holdings LLC | 0.60% | still open |
| June 16, 2014 | Mediobanca - Banca di Credito Finanziario S.p.A. | 0.64% | still open |
| June 16, 2014 | Susquehanna International Holdings LLC | 0.58% | still open |
| June 4, 2014 | BTG Pactual Europe LLP | 0.00% | still open |
| June 3, 2014 | BTG Pactual Europe LLP | 0.53% | still open |
| April 3, 2014 | Altair Investment Management Limited | 0.47% | still open |
| April 2, 2014 | Altair Investment Management Limited | 0.60% | still open |
| November 26, 2013 | Altair Investment Management Limited | 0.75% | still open |
| November 5, 2013 | BlueMountain Capital Management, LLC | 0.49% | still open |
| November 4, 2013 | BlueMountain Capital Management, LLC | 0.51% | still open |
| October 14, 2013 | Altair Investment Management Limited | 0.60% | still open |
| October 10, 2013 | Egerton Capital (UK) LLP | 0.38% | still open |
| August 2, 2013 | Altair Investment Management Limited | 0.50% | still open |
| June 28, 2013 | Wellington Management Company LLP | 0.49% | still open |
| April 4, 2013 | Egerton Capital (UK) LLP | 0.51% | still open |
| November 1, 2012 | Wellington Management Company LLP | 0.54% | still open |