| 1 | Talos Energy Offshore LLC | | Oil & Gas Operator | Jun 2024 |
| 2 | Tana Exploration Company LLC | Dallas, TX 75219 | Oil & Gas Operator | Aug 2021 |
| 3 | Tchefuncte Natural Resources, L.L.C. | | Oil & Gas Operator | Aug 2011 |
| 4 | Tenneco Inc. | | Oil & Gas Operator | Jun 1989 |
| 5 | Tennessee Gas Pipeline Company | Houston, TX 77252 | Oil & Gas Operator | Dec 2011 |
| 6 | Tennessee Gas Pipeline Company, LLC | Houston, TX 77252 | Oil Operator | May 2024 |
| 7 | Terra Resources, Inc. | Casper, WY 82601 | Oil & Gas Operator | Jun 1990 |
| 8 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Nov 2024 |
| 9 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 10 | Texaco Producing Inc. | Rock Springs, WY 82901 | Oil & Gas Operator | Dec 2000 |
| 11 | Texas Crude Exploration, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Aug 1992 |
| 12 | Texas Petroleum Investment Company | Houston, TX 77057 | Oil & Gas Operator | Nov 2024 |
| 13 | Texoil Company | | Oil & Gas Operator | Dec 2000 |
| 14 | The Dow Chemical Company | | Oil & Gas Operator | Dec 1997 |
| 15 | The Harvest Group, LLC | | Oil & Gas Operator | May 2011 |
| 16 | The Meridian Res. & Exp. LLC | | Oil & Gas Operator | Sep 2010 |
| 17 | The WM G Helis Company, L.L.C. | | Oil & Gas Operator | Nov 2003 |
| 18 | Tiger Oil Company | Dallas, TX 75221 | Oil & Gas Operator | May 2007 |
| 19 | Time Energy, L.L.C. | | Oil & Gas Operator | Nov 2020 |
| 20 | Tipco | Shreveport, LA 71104-3047 | Oil & Gas Operator | May 1988 |
| 21 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 22 | Trafalgar House Oil & Gas Inc. | Houston, TX 77002-7346 | Oil & Gas Operator | Jan 1992 |
| 23 | Transco Exploration Company | | Oil & Gas Operator | Jul 1989 |
| 24 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |