| October 25, 2011 | UBS O´connor Limited | 0.72% | still open |
| October 24, 2011 | Highbridge Capital Management LLC | 0.94% | still open |
| October 24, 2011 | UBS O´connor Limited | 0.82% | still open |
| October 21, 2011 | Jana Partners LLC | 1.01% | still open |
| October 21, 2011 | Highbridge Capital Management LLC | 0.83% | still open |
| October 20, 2011 | Jana Partners LLC | 0.70% | still open |
| October 18, 2011 | Highbridge Capital Management LLC | 0.77% | still open |
| October 17, 2011 | Alden Global Value Recovery Master Fund, L.P. | 0.91% | still open |
| October 17, 2011 | Highbridge Capital Management LLC | 0.82% | still open |
| October 11, 2011 | UBS O´connor Limited | 0.60% | still open |
| October 10, 2011 | UBS O´connor Limited | 0.76% | still open |
| October 6, 2011 | UBS O´connor Limited | 0.84% | still open |
| October 5, 2011 | UBS O´connor Limited | 1.03% | still open |
| October 5, 2011 | Highbridge Capital Management LLC | 0.74% | still open |
| October 4, 2011 | Highbridge Capital Management LLC | 0.83% | still open |
| October 3, 2011 | Highbridge Capital Management LLC | 0.91% | still open |
| September 30, 2011 | UBS O´connor Limited | 0.93% | still open |
| September 29, 2011 | UBS O´connor Limited | 0.71% | still open |
| September 26, 2011 | Highbridge Capital Management LLC | 1.01% | still open |
| September 22, 2011 | Alden Global Value Recovery Master Fund, L.P. | 1.11% | still open |
| September 22, 2011 | Pictet Asset Management | 0.55% | still open |
| September 21, 2011 | Alden Global Value Recovery Master Fund, L.P. | 0.82% | still open |
| September 20, 2011 | Highbridge Capital Management LLC | 0.98% | still open |
| September 15, 2011 | Highbridge Capital Management LLC | 1.03% | still open |
| September 14, 2011 | Highbridge Capital Management LLC | 0.97% | still open |
| September 5, 2011 | Jana Partners LLC | 0.68% | still open |
| August 31, 2011 | Highbridge Capital Management LLC | 0.87% | still open |
| August 29, 2011 | Highbridge Capital Management LLC | 0.72% | still open |
| August 26, 2011 | Highbridge Capital Management LLC | 0.63% | still open |
| August 25, 2011 | Highbridge Capital Management LLC | 0.53% | still open |
| July 25, 2011 | Alden Global Value Recovery Master Fund, L.P. | 0.52% | still open |
| July 19, 2011 | Alden Global Value Recovery Master Fund, L.P. | 0.93% | still open |
| July 5, 2011 | Alden Global Value Recovery Master Fund, L.P. | 0.88% | still open |
| June 24, 2011 | Cygnus Asset Management Sgiic,s.a | 0.24% | still open |
| June 23, 2011 | Cygnus Asset Management Sgiic,s.a | 0.71% | still open |
| June 22, 2011 | Cygnus Asset Management Sgiic,s.a | 0.81% | still open |
| May 13, 2011 | Cygnus Asset Management Sgiic,s.a | 0.92% | still open |
| May 6, 2011 | Cygnus Asset Management Sgiic,s.a | 0.80% | still open |
| May 5, 2011 | Cygnus Asset Management Sgiic,s.a | 0.67% | still open |
| April 18, 2011 | Cygnus Asset Management Sgiic,s.a | 0.57% | still open |
| April 13, 2011 | Cygnus Asset Management Sgiic,s.a | 0.74% | still open |
| March 17, 2011 | Cygnus Asset Management Sgiic,s.a | 0.59% | still open |
| March 16, 2011 | Cygnus Asset Management Sgiic,s.a | 0.83% | still open |
| March 14, 2011 | Cygnus Asset Management Sgiic,s.a | 1.14% | still open |
| March 9, 2011 | Cygnus Asset Management Sgiic,s.a | 0.69% | still open |
| March 9, 2011 | Egerton Capital Limited AS General Partner of Egerton Capital Limited Partnership | 0.53% | still open |
| February 25, 2011 | Egerton Capital Limited AS General Partner of Egerton Capital Limited Partnership | 0.76% | still open |
| January 7, 2011 | Egerton Capital Limited AS General Partner of Egerton Capital Limited Partnership | 0.80% | still open |
| December 29, 2010 | Egerton Capital Limited AS General Partner of Egerton Capital Limited Partnership | 0.77% | still open |
| December 10, 2010 | Egerton Capital Limited AS General Partner of Egerton Capital Limited Partnership | 0.81% | still open |