| 1 | Taos Resources Operating Co LLC | Houston, TX 77037 | Oil & Gas Operator | Dec 2019 |
| 2 | Te-Ray Resources, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Mar 2015 |
| 3 | Teamco Operating LLC | Houston, TX 77042 | Oil & Gas Operator | Oct 2002 |
| 4 | Teton Petroleum Corporation | Kerrville, TX 78028 | Oil & Gas Operator | Dec 2024 |
| 5 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Dec 2024 |
| 6 | Texakoma E & P, LLC | Plano, TX 75024 | Oil & Gas Operator | Dec 2024 |
| 7 | Texas Fuel Company | Galveston, TX 77550 | Oil & Gas Operator | Dec 2024 |
| 8 | Texas Independent Explor LTD. | Houston, TX 77024 | Oil & Gas Operator | Dec 2024 |
| 9 | Texas Independent Explor., Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2002 |
| 10 | Texas Petroleum Investment Company | Houston, TX 77057 | Oil & Gas Operator | Dec 2024 |
| 11 | The Houston Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2017 |
| 12 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 13 | Torrent Oil LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 14 | Tower Resources Inc | Conroe, TX 77304 | Oil & Gas Operator | Dec 2024 |
| 15 | Transtexas Gas Corporation | Houston, TX 77265 | Oil & Gas Operator | Aug 2005 |
| 16 | Tri-Union Development Corp. | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 17 | Triad Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Oct 2011 |
| 18 | Trident Corporation | Woodsboro, TX 78393 | Oil & Gas Operator | Dec 2024 |
| 19 | Trinidad Resources, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2024 |
| 20 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 21 | Tschoepe, Arthur J. | Leakey, TX 78873 | Oil & Gas Operator | Jun 2001 |
| 22 | TX Petroleum Company | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Apr 1996 |