| March 5, 2015 | Lansdowne Partners (UK) LLP | 1.26% | still open |
| February 26, 2015 | Blackrock Institutional Trust Company, National Association | 0.78% | still open |
| February 18, 2015 | Lansdowne Partners (UK) LLP | 1.44% | still open |
| February 10, 2015 | Insight Investment Management (global) LTD | 0.68% | still open |
| January 30, 2015 | Lansdowne Partners (UK) LLP | 1.57% | still open |
| January 30, 2015 | Blackrock Institutional Trust Company, National Association | 0.88% | still open |
| January 29, 2015 | Lansdowne Partners (UK) LLP | 1.66% | still open |
| January 23, 2015 | Lansdowne Partners (UK) LLP | 1.77% | still open |
| January 23, 2015 | Henderson Global Investors | 0.42% | still open |
| January 19, 2015 | Lansdowne Partners (UK) LLP | 2.27% | still open |
| January 15, 2015 | Blackrock Institutional Trust Company, National Association | 0.90% | still open |
| January 14, 2015 | Lansdowne Partners (UK) LLP | 2.44% | still open |
| January 13, 2015 | Lansdowne Partners (UK) LLP | 2.51% | still open |
| January 5, 2015 | Blackrock Institutional Trust Company, National Association | 0.89% | still open |
| December 29, 2014 | Blackrock Institutional Trust Company, National Association | 0.90% | still open |
| December 22, 2014 | Blackrock Institutional Trust Company, National Association | 0.89% | still open |
| November 20, 2014 | Blackrock Institutional Trust Company, National Association | 0.99% | still open |
| October 31, 2014 | Henderson Global Investors | 0.50% | still open |
| October 9, 2014 | Blackrock Institutional Trust Company, National Association | 1.00% | still open |
| October 7, 2014 | Blackrock Institutional Trust Company, National Association | 0.92% | still open |
| September 23, 2014 | Blackrock Institutional Trust Company, National Association | 0.80% | still open |
| September 18, 2014 | Blackrock Institutional Trust Company, National Association | 0.72% | still open |
| September 16, 2014 | Blackrock Institutional Trust Company, National Association | 0.63% | still open |
| September 11, 2014 | Blackrock Institutional Trust Company, National Association | 0.51% | still open |
| July 29, 2014 | Insight Investment Management (global) LTD | 0.74% | still open |
| July 24, 2014 | Insight Investment Management (global) LTD | 0.51% | still open |
| July 1, 2014 | Lansdowne Partners (UK) LLP | 2.82% | still open |
| July 1, 2014 | Lansdowne Partners Limited* | 0.00% | still open |
| April 10, 2014 | Lansdowne Partners Limited* | 2.82% | still open |
| October 14, 2013 | Insight Investment Management (global) LTD | 0.48% | still open |
| September 18, 2013 | Insight Investment Management (global) LTD | 0.50% | still open |
| September 11, 2013 | Blackrock Institutional Trust Company, National Association | 0.45% | still open |
| September 10, 2013 | Blackrock Institutional Trust Company, National Association | 0.56% | still open |
| August 30, 2013 | Blackrock Institutional Trust Company, National Association | 0.62% | still open |
| August 28, 2013 | Blackrock Institutional Trust Company, National Association | 0.56% | still open |
| July 29, 2013 | Newbrook Capital Advisors LP | 0.47% | still open |
| July 26, 2013 | Newbrook Capital Advisors LP | 0.56% | still open |
| July 9, 2013 | Newbrook Capital Advisors LP | 0.69% | still open |
| May 31, 2013 | Lansdowne Partners Limited* | 2.99% | still open |
| April 16, 2013 | Newbrook Capital Advisors LP | 0.74% | still open |
| March 21, 2013 | Lansdowne Partners Limited* | 3.08% | still open |
| March 7, 2013 | Saemor Capital B.V. | 0.46% | still open |
| February 20, 2013 | Lansdowne Partners Limited* | 3.12% | still open |
| February 19, 2013 | Lansdowne Partners Limited* | 3.02% | still open |
| February 14, 2013 | Lansdowne Partners Limited* | 2.81% | still open |
| February 13, 2013 | Lansdowne Partners Limited* | 2.65% | still open |
| February 12, 2013 | Lansdowne Partners Limited* | 2.45% | still open |
| February 6, 2013 | Lansdowne Partners Limited* | 2.06% | still open |
| February 1, 2013 | Lansdowne Partners Limited* | 1.94% | still open |
| January 30, 2013 | Lansdowne Partners Limited* | 1.81% | still open |