| SC 13G/A | 2013-02-14 | CHESAPEAKE ENERGY CORP | Clean Energy Fuels Corp. | 7,329,112 | 7.8% | EDGAR |
| SC 13G/A | 2013-02-14 | WELLINGTON MANAGEMENT CO LLP | CHESAPEAKE ENERGY CORP | 24,424,739 | 3.7% | EDGAR |
| SC 13D/A | 2012-11-20 | ICAHN CARL C | CHESAPEAKE ENERGY CORP | 11,939,739 | 1.8% | EDGAR |
| SC 13D/A | 2012-07-06 | ICAHN CARL C | CHESAPEAKE ENERGY CORP | - | - | EDGAR |
| SC 13D/A | 2012-07-03 | CHESAPEAKE ENERGY CORP | CHESAPEAKE MIDSTREAM PARTNERS LP | 0 | 0.0% | EDGAR |
| SC 13D/A | 2012-06-19 | CHESAPEAKE ENERGY CORP | CHESAPEAKE MIDSTREAM PARTNERS LP | 40,142,781 | 27.1% | EDGAR |
| SC 13D/A | 2012-06-13 | CHESAPEAKE ENERGY CORP | CHESAPEAKE MIDSTREAM PARTNERS LP | 68,242,727 | 46.1% | EDGAR |
| SC 13D/A | 2012-06-08 | SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | CHESAPEAKE ENERGY CORP | 92,025,094 | 13.9% | EDGAR |
| SC 13D/A | 2012-06-04 | ICAHN CARL C | CHESAPEAKE ENERGY CORP | - | - | EDGAR |
| SC 13D | 2012-05-25 | ICAHN CARL C | CHESAPEAKE ENERGY CORP | 10,017,042 | 1.5% | EDGAR |
| SC 13G | 2012-05-10 | CHESAPEAKE ENERGY CORP | Clean Energy Fuels Corp. | 7,354,824 | 7.9% | EDGAR |
| SC 13D/A | 2012-05-07 | SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | CHESAPEAKE ENERGY CORP | 89,854,868 | 13.6% | EDGAR |
| SC 13D | 2012-05-02 | SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | CHESAPEAKE ENERGY CORP | 89,854,868 | 13.6% | EDGAR |
| SC 13G/A | 2012-02-14 | CHESAPEAKE ENERGY CORP | GASTAR EXPLORATION LTD | 6,781,768 | 10.5% | EDGAR |
| SC 13G | 2012-02-14 | WELLINGTON MANAGEMENT CO LLP | CHESAPEAKE ENERGY CORP | 50,485,371 | 7.6% | EDGAR |
| SC 13G/A | 2012-02-06 | SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | CHESAPEAKE ENERGY CORP | - | 13.3% | EDGAR |
| SC 13D | 2012-01-09 | CHESAPEAKE ENERGY CORP | CHESAPEAKE MIDSTREAM PARTNERS LP | 68,242,727 | 46.1% | EDGAR |
| SC 13D | 2011-11-29 | CHESAPEAKE ENERGY CORP | CHESAPEAKE GRANITE WASH TRUST | - | 34.4% | EDGAR |
| SC 13G/A | 2011-10-07 | BlackRock Inc. | CHESAPEAKE ENERGY CORP | 316,913,625 | 4.8% | EDGAR |
| SC 13D | 2011-04-25 | CHESAPEAKE ENERGY CORP | Bronco Drilling Company, Inc. | 14,520,746 | 42.4% | EDGAR |