| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | T. C. Morrow Oil Co. | Oil & Gas Operator | Apr 1991 | |
| 2 | T. J. Operating Co., Inc. | Oil & Gas Operator | Aug 1998 | |
| 3 | Tennessee Gas Pipeline Company | Houston, TX 77252 | Oil & Gas Operator | Dec 2011 |
| 4 | Texas Gas Transmission Corp. | Oil Operator | Aug 2003 | |
| 5 | Texas Gas Transmission LLC | Owensboro, KY 42301 | Oil & Gas Operator | Dec 2023 |
| 6 | Texas Pacific Oil Company Inc. | Oil & Gas Operator | Dec 1980 | |
| 7 | Texas T Oil Co. | Oil & Gas Operator | Apr 1990 | |
| 8 | Transcontinental Oil Corp. | Oil & Gas Operator | Sep 1985 |