| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2005-02-14 | FMR CORP | CHESAPEAKE ENERGY CORP | 16,333,180 | 5.7% | EDGAR |
| SC 13G | 2005-02-14 | WELLINGTON MANAGEMENT CO LLP | CHESAPEAKE ENERGY CORP | 16,413,660 | 6.1% | EDGAR |
| SC 13D | 2004-08-19 | CHESAPEAKE ENERGY CORP | PIONEER DRILLING CO | - | 17.0% | EDGAR |
| SC 13G | 2004-02-17 | FMR CORP | CHESAPEAKE ENERGY CORP | 12,259,563 | 5.6% | EDGAR |
| SC 13D | 2003-06-18 | MCCLENDON AUBREY K | CHESAPEAKE ENERGY CORP | - | 6.3% | EDGAR |
| SC 13D/A | 2003-06-09 | MCCLENDON AUBREY K | CHESAPEAKE ENERGY CORP | - | 7.9% | EDGAR |
| SC 13D | 2003-05-29 | MCCLENDON AUBREY K | CHESAPEAKE ENERGY CORP | - | 7.0% | EDGAR |
| SC 13D | 2003-04-03 | CHESAPEAKE ENERGY CORP | PIONEER DRILLING CO | - | 24.6% | EDGAR |
| SC 13D/A | 2002-04-23 | CHESAPEAKE ENERGY CORP | CANAAN ENERGY CORP | 1,500,427 | 34.5% | EDGAR |
| SC 13G/A | 2002-02-13 | FRANKLIN RESOURCES INC | CHESAPEAKE ENERGY CORP | 5,881,206 | 3.5% | EDGAR |
| SC 13D | 2001-12-13 | CHESAPEAKE ENERGY CORP | CANAAN ENERGY CORP | 333,149 | 7.6% | EDGAR |
| SC 13D | 2001-08-27 | CHESAPEAKE ENERGY CORP | SEVEN SEAS PETROLEUM INC | - | 25.0% | EDGAR |
| SC 13G/A | 2001-02-13 | FMR CORP | CHESAPEAKE ENERGY CORP | 2,084,742 | 1.4% | EDGAR |
| SC 13G/A | 2001-01-29 | FRANKLIN RESOURCES INC | CHESAPEAKE ENERGY CORP | 6,765,600 | 4.5% | EDGAR |
| SC 13D/A | 2000-07-05 | - | - | - | - | EDGAR |
| SC 13D/A | 2000-06-29 | - | - | - | - | EDGAR |
| SC 13G/A | 2000-06-09 | - | - | - | - | EDGAR |
| SC 13G/A | 2000-03-10 | FMR CORP | CHESAPEAKE ENERGY CORP | 11,017,236 | 10.8% | EDGAR |
| SC 13G/A | 2000-03-10 | FMR CORP | CHESAPEAKE ENERGY CORP | 11,017,236 | 10.8% | EDGAR |
| SC 13G/A | 2000-03-10 | FMR CORP | CHESAPEAKE ENERGY CORP | 11,017,236 | 10.8% | EDGAR |