| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | T. N. T. Tribal - Luffey | Gas Operator | Oct 1994 | |
| 2 | Tedco | Gas Operator | Nov 1988 | |
| 3 | Teel 78 A | Gas Operator | Dec 1980 | |
| 4 | Terronne Petroleum Corporation | Oil & Gas Operator | Nov 2024 | |
| 5 | Texas Gas Transmission Corp. | Oil Operator | Aug 2003 | |
| 6 | Texas Gas Transmission LLC | Owensboro, KY 42301 | Oil & Gas Operator | Dec 2024 |
| 7 | The Pioneer | Gas Operator | Feb 2008 | |
| 8 | Tomlinson Oil Co. Inc. | Great Bend, KS 67530 | Oil & Gas Operator | May 2025 |
| 9 | Tulip Industries, Inc. | Oil & Gas Operator | Feb 2024 | |
| 10 | Twin City Gas | Gas Operator | Nov 1997 |