| SC 13G | 2012-01-09 | Ensco plc | HERCULES OFFSHORE, INC. | 2,826,854 | 2.1% | EDGAR |
| SC 13G/A | 2011-08-10 | ALLIANCEBERNSTEIN L.P. | Ensco plc | 259,189 | 0.1% | EDGAR |
| SC 13G/A | 2011-02-14 | FMR LLC | Ensco plc | 12,904,656 | 9.0% | EDGAR |
| SC 13G/A | 2011-02-14 | WELLINGTON MANAGEMENT CO LLP | Ensco plc | 16,962,494 | 11.9% | EDGAR |
| SC 13G/A | 2011-02-14 | GREENLIGHT CAPITAL LLC | Ensco plc | 3,220,340 | 2.3% | EDGAR |
| SC 13G | 2011-02-09 | ALLIANCEBERNSTEIN L.P. | Ensco plc | 10,535,399 | 7.4% | EDGAR |
| SC 13G | 2011-02-09 | First Pacific Advisors, LLC | Ensco plc | 8,144,000 | 5.7% | EDGAR |
| SC 13G | 2010-12-10 | WELLINGTON MANAGEMENT CO LLP | Ensco plc | 14,775,304 | 10.3% | EDGAR |
| SC 13G | 2010-07-12 | GREENLIGHT CAPITAL LLC | Ensco plc | 2,653,228 | 1.9% | EDGAR |
| SC 13G/A | 2010-03-11 | FMR LLC | Ensco International plc | 14,394,529 | 10.1% | EDGAR |
| SC 13G/A | 2010-02-12 | STATE STREET BANK & TRUST CO | Ensco International plc | 85,287 | 0.1% | EDGAR |
| SC 13G/A | 2010-02-08 | VANGUARD GROUP INC | Ensco International plc | 1,183 | 0.0% | EDGAR |
| SC 13G/A | 2009-11-10 | FMR LLC | ENSCO INTERNATIONAL INC | 14,536,724 | 10.2% | EDGAR |
| SC 13G/A | 2009-05-08 | BlackRock Inc. | ENSCO INTERNATIONAL INC | 5,429,249 | 3.8% | EDGAR |
| SC 13G | 2009-02-17 | FMR LLC | ENSCO INTERNATIONAL INC | 10,735,862 | 7.6% | EDGAR |
| SC 13G | 2009-02-13 | STATE STREET BANK & TRUST CO | ENSCO INTERNATIONAL INC | 7,936,965 | 5.6% | EDGAR |
| SC 13G | 2009-02-13 | VANGUARD GROUP INC | ENSCO INTERNATIONAL INC | 7,355,236 | 5.2% | EDGAR |
| SC 13G/A | 2009-02-12 | NEUBERGER BERMAN INC | ENSCO INTERNATIONAL INC | 5,762,965 | 4.1% | EDGAR |
| SC 13G/A | 2009-02-10 | UBS GLOBAL ASSET MANAGEMENT AMERICAS INC | ENSCO INTERNATIONAL INC | 893,009 | 63.0% | EDGAR |
| SC 13G | 2009-02-10 | BlackRock Inc. | ENSCO INTERNATIONAL INC | 7,858,374 | 5.5% | EDGAR |