| July 26, 2013 | Blackrock Institutional Trust Company, National Association | 0.71% | still open |
| July 26, 2013 | Jpmorgan Asset Management (UK) LTD | 0.38% | still open |
| July 24, 2013 | Blackrock Institutional Trust Company, National Association | 0.68% | still open |
| July 23, 2013 | Blackrock Institutional Trust Company, National Association | 0.71% | still open |
| July 17, 2013 | Highbridge Capital Management LLC | 0.78% | still open |
| July 16, 2013 | Blackrock Institutional Trust Company, National Association | 0.64% | still open |
| July 15, 2013 | Highbridge Capital Management LLC | 0.85% | still open |
| July 15, 2013 | Blackrock Institutional Trust Company, National Association | 0.70% | still open |
| July 10, 2013 | Highbridge Capital Management LLC | 0.95% | still open |
| July 10, 2013 | Jpmorgan Asset Management (UK) LTD | 0.50% | still open |
| July 9, 2013 | Blackrock Institutional Trust Company, National Association | 0.69% | still open |
| July 9, 2013 | Maverick Capital, LTD. | 0.29% | still open |
| July 8, 2013 | Maverick Capital, LTD. | 0.52% | still open |
| July 5, 2013 | Highbridge Capital Management LLC | 0.98% | still open |
| July 5, 2013 | Blackrock Institutional Trust Company, National Association | 0.70% | still open |
| July 5, 2013 | Maverick Capital, LTD. | 0.68% | still open |
| July 4, 2013 | Oxford Asset Management | 1.19% | still open |
| July 4, 2013 | Maverick Capital, LTD. | 0.84% | still open |
| July 2, 2013 | Maverick Capital, LTD. | 0.97% | still open |
| July 1, 2013 | Maverick Capital, LTD. | 1.04% | still open |
| June 28, 2013 | Maverick Capital, LTD. | 1.12% | still open |
| June 28, 2013 | Barrington Wilshire LLC | 0.80% | still open |
| June 26, 2013 | Maverick Capital, LTD. | 1.29% | still open |
| June 25, 2013 | Maverick Capital, LTD. | 1.33% | still open |
| June 24, 2013 | Maverick Capital, LTD. | 1.41% | still open |
| June 21, 2013 | Maverick Capital, LTD. | 1.55% | still open |
| June 20, 2013 | Maverick Capital, LTD. | 1.71% | still open |
| June 20, 2013 | Oxford Asset Management | 1.20% | still open |
| June 19, 2013 | Maverick Capital, LTD. | 1.88% | still open |
| June 18, 2013 | Maverick Capital, LTD. | 2.03% | still open |
| June 18, 2013 | Highbridge Capital Management LLC | 1.02% | still open |
| June 14, 2013 | Maverick Capital, LTD. | 2.19% | still open |
| June 13, 2013 | Maverick Capital, LTD. | 2.27% | still open |
| June 12, 2013 | AQR Capital Management, LLC | 1.82% | still open |
| June 12, 2013 | Blackrock Institutional Trust Company, National Association | 0.60% | still open |
| June 11, 2013 | Maverick Capital, LTD. | 2.39% | still open |
| June 10, 2013 | Maverick Capital, LTD. | 2.50% | still open |
| June 10, 2013 | Highbridge Capital Management LLC | 0.94% | still open |
| June 7, 2013 | Maverick Capital, LTD. | 2.65% | still open |
| June 6, 2013 | Maverick Capital, LTD. | 2.75% | still open |
| June 5, 2013 | Maverick Capital, LTD. | 2.93% | still open |
| June 5, 2013 | Blackrock Institutional Trust Company, National Association | 0.59% | still open |
| June 4, 2013 | Maverick Capital, LTD. | 3.19% | still open |
| June 3, 2013 | Maverick Capital, LTD. | 3.55% | still open |
| May 31, 2013 | Maverick Capital, LTD. | 3.72% | still open |
| May 31, 2013 | Barrington Wilshire LLC | 1.00% | still open |
| May 30, 2013 | Maverick Capital, LTD. | 3.89% | still open |
| May 30, 2013 | Barrington Wilshire LLC | 1.20% | still open |
| May 29, 2013 | Maverick Capital, LTD. | 4.00% | still open |
| May 29, 2013 | Barrington Wilshire LLC | 1.27% | still open |