| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13D/A | 2011-03-18 | ICAHN CARL C | CHESAPEAKE ENERGY CORP | 5,452,832 | 0.8% | EDGAR |
| SC 13G/A | 2011-02-22 | CHESAPEAKE ENERGY CORP | GASTAR EXPLORATION LTD | 6,781,768 | 10.6% | EDGAR |
| SC 13G/A | 2011-02-11 | CHESAPEAKE ENERGY CORP | CHESAPEAKE ENERGY CORP | 6,781,768 | 10.6% | EDGAR |
| SC 13G | 2011-02-11 | CHESAPEAKE ENERGY CORP | Chesapeake Midstream Partners, L.P. | 58,451,122 | 42.3% | EDGAR |
| SC 13G/A | 2011-02-07 | SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | CHESAPEAKE ENERGY CORP | - | 12.5% | EDGAR |
| SC 13G/A | 2011-02-03 | BlackRock Inc. | CHESAPEAKE ENERGY CORP | 35,233,426 | 5.4% | EDGAR |
| SC 13D | 2010-12-17 | ICAHN CARL C | CHESAPEAKE ENERGY CORP | 7,725,884 | 1.2% | EDGAR |
| SC 13G/A | 2010-11-10 | FMR LLC | CHESAPEAKE ENERGY CORP | 18,780,891 | 2.9% | EDGAR |
| SC 13G/A | 2010-02-16 | FMR LLC | CHESAPEAKE ENERGY CORP | 55,530,131 | 8.5% | EDGAR |
| SC 13G/A | 2010-02-10 | CHESAPEAKE ENERGY CORP | GASTAR EXPLORATION LTD | 6,781,767 | 13.6% | EDGAR |
| SC 13G/A | 2010-02-05 | SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | CHESAPEAKE ENERGY CORP | - | 11.8% | EDGAR |
| SC 13G | 2010-01-29 | BlackRock Inc. | CHESAPEAKE ENERGY CORP | 37,268,428 | 5.7% | EDGAR |
| SC 13G/A | 2009-07-10 | HARRIS FINANCIAL CORP | CHESAPEAKE ENERGY CORP | 0 | 0.0% | EDGAR |
| SC 13G/A | 2009-02-17 | FMR LLC | CHESAPEAKE ENERGY CORP | 81,146,427 | 13.3% | EDGAR |
| SC 13G/A | 2009-02-09 | HARRIS FINANCIAL CORP | CHESAPEAKE ENERGY CORP | 15,200 | 10.6% | EDGAR |
| SC 13G/A | 2009-02-06 | SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | CHESAPEAKE ENERGY CORP | - | 10.9% | EDGAR |
| SC 13G/A | 2009-01-13 | CHESAPEAKE ENERGY CORP | GASTAR EXPLORATION LTD | 33,908,836 | 16.2% | EDGAR |
| SC 13D/A | 2008-10-14 | MCCLENDON AUBREY K | CHESAPEAKE ENERGY CORP | 27,175,812 | 4.7% | EDGAR |
| SC 13G | 2008-06-09 | HARRIS FINANCIAL CORP | CHESAPEAKE ENERGY CORP | 14,700 | 10.2% | EDGAR |
| SC 13D/A | 2008-03-27 | Ward Tom L. | CHESAPEAKE ENERGY CORP | 23,816,390 | 4.6% | EDGAR |