| February 21, 2012 | S.A.C. Capital Advisors, L.P. | 1.33% | still open |
| February 20, 2012 | Highbridge Capital Management LLC | 0.68% | still open |
| February 17, 2012 | Egerton Capital Limited AS General Partner of Egerton Capital Limited Partnership | 0.99% | still open |
| February 15, 2012 | Egerton Capital Limited AS General Partner of Egerton Capital Limited Partnership | 0.81% | still open |
| February 15, 2012 | Highbridge Capital Management LLC | 0.78% | still open |
| February 13, 2012 | UBS O´connor Limited | 0.88% | still open |
| February 10, 2012 | UBS O´connor Limited | 0.78% | still open |
| February 9, 2012 | GLG Partners LP | 0.56% | still open |
| February 7, 2012 | UBS O´connor Limited | 0.85% | still open |
| February 2, 2012 | UBS O´connor Limited | 0.75% | still open |
| February 1, 2012 | UBS O´connor Limited | 0.65% | still open |
| January 26, 2012 | Highbridge Capital Management LLC | 0.87% | still open |
| January 26, 2012 | Egerton Capital Limited AS General Partner of Egerton Capital Limited Partnership | 0.64% | still open |
| January 25, 2012 | S.A.C. Capital Advisors, L.P. | 1.42% | still open |
| January 24, 2012 | S.A.C. Capital Advisors, L.P. | 1.40% | still open |
| January 20, 2012 | S.A.C. Capital Advisors, L.P. | 1.21% | still open |
| January 18, 2012 | Highbridge Capital Management LLC | 0.91% | still open |
| January 17, 2012 | Highbridge Capital Management LLC | 0.88% | still open |
| January 12, 2012 | S.A.C. Capital Advisors, L.P. | 1.15% | still open |
| January 11, 2012 | Highbridge Capital Management LLC | 1.00% | still open |
| January 9, 2012 | S.A.C. Capital Advisors, L.P. | 1.22% | still open |
| January 9, 2012 | Highbridge Capital Management LLC | 1.07% | still open |
| January 6, 2012 | S.A.C. Capital Advisors, L.P. | 1.00% | still open |
| January 4, 2012 | Highbridge Capital Management LLC | 1.17% | still open |
| January 4, 2012 | S.A.C. Capital Advisors, L.P. | 0.96% | still open |
| December 29, 2011 | S.A.C. Capital Advisors, L.P. | 0.85% | still open |
| December 28, 2011 | S.A.C. Capital Advisors, L.P. | 0.80% | still open |
| December 27, 2011 | S.A.C. Capital Advisors, L.P. | 0.65% | still open |
| December 22, 2011 | S.A.C. Capital Advisors, L.P. | 0.53% | still open |
| December 14, 2011 | Highbridge Capital Management LLC | 1.29% | still open |
| November 27, 2011 | Highbridge Capital Management LLC | 1.33% | still open |
| November 23, 2011 | Jana Partners LLC | 0.00% | still open |
| November 21, 2011 | Highbridge Capital Management LLC | 1.25% | still open |
| November 21, 2011 | Jana Partners LLC | 0.63% | still open |
| November 18, 2011 | Highbridge Capital Management LLC | 1.20% | still open |
| November 18, 2011 | UBS O´connor Limited | 0.58% | still open |
| November 17, 2011 | Highbridge Capital Management LLC | 1.03% | still open |
| November 16, 2011 | Highbridge Capital Management LLC | 0.95% | still open |
| November 14, 2011 | UBS O´connor Limited | 0.81% | still open |
| November 9, 2011 | Jana Partners LLC | 0.87% | still open |
| November 8, 2011 | UBS O´connor Limited | 0.74% | still open |
| November 4, 2011 | Highbridge Capital Management LLC | 0.80% | still open |
| November 4, 2011 | Marshall Wace LLP | 0.60% | still open |
| November 3, 2011 | Jpmorgan Asset Management (UK) Limited | 0.53% | still open |
| November 2, 2011 | Marshall Wace LLP | 0.54% | still open |
| October 31, 2011 | Highbridge Capital Management LLC | 0.72% | still open |
| October 31, 2011 | UBS O´connor Limited | 0.70% | still open |
| October 31, 2011 | Altair Investment Management Limited | 0.56% | still open |
| October 28, 2011 | UBS O´connor Limited | 0.58% | still open |
| October 26, 2011 | UBS O´connor Limited | 0.66% | still open |
| 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 |
| November 29, 2010 | Egerton Capital Limited AS General Partner of Egerton Capital Limited Partnership | 1.20% | still open |
| November 24, 2010 | Oxford Asset Management | 0.55% | still open |
| November 17, 2010 | Oxford Asset Management | 0.66% | still open |
| November 8, 2010 | Oxford Asset Management | 0.72% | still open |
| November 8, 2010 | UBS O´connor Limited | 0.53% | still open |