| PATTON, E. N. OIL COMPANY, INC. | 328,910 | 0 |
| PERKINS-PROTHRO COMPANY | 145,857 | 0 |
| PRIMROSE OPERATING COMPANY | 126,534 | 0 |
| T-N-T ENGINEERING, INC. | 125,785 | 0 |
| GUNN OIL COMPANY | 121,982 | 33,452,712 |
| NAGUAL EXPLORATION LLC | 74,036 | 0 |
| BASS ENTERPRISES PRODUCTION CO. | 72,713 | 15,317 |
| TEXAS ROYALTY CORP. | 54,450 | 0 |
| CHOLLA PETROLEUM, INC. | 51,069 | 1,053,715 |
| BETTIS, BOYLE & STOVALL | 44,781 | 0 |
| DOUBLE M PETROPROPERTIES, INC. | 42,214 | 0 |
| SUNLIGHT EXPLORATION, INC. | 30,783 | 0 |
| GREGCO, INC. | 11,980 | 0 |
| BOPCO, L.P. | 7,378 | 0 |
| CORDA CORPORATION | 6,818 | 1,531,476 |
| BEPCO, L.P. | 4,734 | 0 |
| WILCOX PETROLEUM OPERATING LLC. | 4,041 | 8,116 |
| ERATZ INVESTMENTS INC. | 2,104 | 11,551 |
| TREK RESOURCES, INC. | 1,615 | 1,747,624 |
| BURNETT OIL CO., INC. | 1,421 | 45,916,921 |
| SOJOURNER DRILLING CORPORATION | 524 | 1,505,616 |
| MJM OIL & GAS, INC. | 284 | 0 |
| CODA ENERGY, INC. | 127 | 0 |
| UNITEX OIL & GAS, L.L.C. | 73 | 103,228 |
| DOUBLE EAGLE PETROLEUM CORP | 0 | 41,003 |
| BELCO ENERGY CORP. | 0 | 0 |
| DRACO PRODUCTION COMPANY | 0 | 3,557 |
| BRIDWELL OIL CO. | 0 | 0 |
| LYNX ENERGY COMPANY, INC. | 0 | 68,046 |
| VISTA RESOURCES, INC. (A) | 0 | 89,173 |
| CLEAR FORK, INCORPORATED | 0 | 52,905 |
| GEOFFROY-TIPPEN CORPORATION | 0 | 0 |
| WHALEN DRILLING & MINING CO. | 0 | 0 |
| SEQUOIA NATURAL GAS, INC. | 0 | 2,879 |
| PRIZE OPERATING COMPANY | 0 | 61,521 |
| ALPINE PETROLEUM | 0 | 263,584 |
| ROLLING PLAINS WELL SERVICE, INC | 0 | 0 |
| STRAWN DRLG. CO. | 0 | 0 |
| SEQUOIA FOSSIL FUELS, INC. | 0 | 109,582 |
| MIRESCO, INC. | 0 | 142,873 |
| BASIC ENERGY SERVICES, L.P. | 0 | 0 |
| OASIS OPERATING, INC. | 0 | 99,856 |
| PETROTEX, INC. | 0 | 316,667 |
| MIDLAND RES. OPER. CO., INC. | 0 | 335,612 |
| STB ENERGY INC. | 0 | 98,282 |
| ROSS, DWIGHT M. DRLG. CO., INC. | 0 | 43,590 |
| WILCOX OIL COMPANY | 0 | 0 |
| CITORI OIL COMPANY, LLC | 0 | 453,295 |
| CONCHO OILFIELD SERVICE, INC. | 0 | 48,195 |
| GRUY PETROLEUM MANAGEMENT CO. | 0 | 15,976 |
| EXCO RESOURCES, INC. | 0 | 124,234 |
| CREED OPERATING CO., LLC | 0 | 41,679 |
| WESTPORT OIL AND GAS COMPANY, LP | 0 | 0 |
| TIDE WEST OIL COMPANY | 0 | 34,209 |
| E.G. OPERATING | 0 | 86,459 |
| CASE OIL | 0 | 96,060 |
| EP OPERATING LIMITED PARTNERSHIP | 0 | 196,076 |
| DUNAGIN TRANSPORT COMPANY | 0 | 0 |
| SMITH PIPE OF ABILENE | 0 | 0 |
| SSC, INC. | 0 | 14,091 |
| DELWINTEX OIL & GAS PROP., INC. | 0 | 231,024 |
| PPC OPERATING COMPANY LLC | 0 | 59,199 |
| ENSERCH EXPLORATION, INC | 0 | 190,705 |
| BO DUNAGIN OPERATING, LLC | 0 | 0 |
| EDWARDS, GUS CO. | 0 | 1,945,227 |
| HORIZON NATURAL RESOURCES, INC. | 0 | 5,651 |
| PATTON EXPLORATION, INC. | 0 | 14,650 |
| S N D ENERGY COMPANY, INC. | 0 | 102,643 |
Operator Production Data 
