| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Tej Ventures | Oil & Gas Operator | Dec 2002 | |
| 2 | Terra Exploration & Production Co. Inc. | Oil & Gas Operator | Dec 2009 | |
| 3 | Texaco Producing Inc. | Rock Springs, WY 82901 | Oil & Gas Operator | Dec 2000 |
| 4 | The Lansdale Co. | Oil & Gas Operator | Aug 2025 | |
| 5 | The Port Of Long Beach | Oil & Gas Operator | Dec 1997 | |
| 6 | The Termo Company | Long Beach, CA 90801 | Oil & Gas Operator | Aug 2025 |
| 7 | Thomas R. Banks | Oil Operator | Jul 2025 | |
| 8 | Thompson Oil Co. | Corsicana, TX 75151 | Oil & Gas Operator | Jul 2025 |
| 9 | Thums Long Beach Co. | Oil & Gas Operator | Jul 2025 | |
| 10 | Tidelands Oil Production Co. | Oil & Gas Operator | Jul 2025 | |
| 11 | Timco Oil Co. | Oil & Gas Operator | Dec 1987 | |
| 12 | Titan Energy, Inc. | Austin, TX 78703 | Oil & Gas Operator | Oct 2025 |
| 13 | TJ Scott Family Investments LLC | Oil & Gas Operator | Aug 2025 | |
| 14 | Topko N. Wilmington Prtnrship. | Oil & Gas Operator | Dec 1995 | |
| 15 | Torrance Petroleum Inc. | Oil & Gas Operator | Dec 2003 | |
| 16 | Tosco Enhanced Oil Recovery Corporation | Oil Operator | Dec 1981 | |
| 17 | Transpac Petroleum Inc. | Oil & Gas Operator | Dec 1995 | |
| 18 | Trio Petroleum LLC | Oil & Gas Operator | Jul 2025 | |
| 19 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |