| 1 | T&R Energy Services | Pampa, TX 79065 | Oil & Gas Operator | Sep 2025 |
| 2 | Talon Oil & Gas LLC | Dallas, TX 75243 | Oil & Gas Operator | Dec 2010 |
| 3 | Tascosa Energy Partners, L.L.C | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 4 | Taylor Properties | Wichita Falls, TX 76301 | Gas Operator | Sep 2025 |
| 5 | Taylor-Clayton-Hawley | Wichita Falls, TX 76301 | Oil & Gas Operator | Nov 2019 |
| 6 | TB Operating, LLC | Borger, TX 79008 | Oil & Gas Operator | Jun 2018 |
| 7 | Tex-Well Oil & Gas Corp. | Pampa, TX 79066 | Oil & Gas Operator | Aug 2003 |
| 8 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Sep 2025 |
| 9 | Texian Energy Corporation | Amarillo, TX 79120 | Oil & Gas Operator | Apr 1997 |
| 10 | The Operating Co. | Pampa, TX 79065 | Oil & Gas Operator | Sep 2007 |
| 11 | Tigrett, Robert L. Oil & Gas Co. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2013 |
| 12 | Top O'Texas Energy, L.P. | Pampa, TX 79066 | Oil & Gas Operator | Sep 2025 |
| 13 | Top O'Texas Production Co. | Pampa, TX 79065 | Oil & Gas Operator | May 2024 |
| 14 | Top O'Texas Production, Inc. | Odessa, TX 79764 | Oil & Gas Operator | Feb 1997 |
| 15 | Trans Terra Corp., International | Amarillo, TX 79159 | Oil & Gas Operator | Feb 2009 |
| 16 | Travelers Oil Company | Amarillo, TX 79102 | Oil & Gas Operator | Sep 2025 |
| 17 | Trejim Operators, LLC | Pampa, TX 79065 | Oil & Gas Operator | Sep 2025 |
| 18 | Trek Exploration, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Sep 2025 |
| 19 | Triple J Oil Co. | Pampa, TX 79065 | Oil & Gas Operator | Aug 1996 |
| 20 | Tryma Operating | Borger, TX 79008 | Oil & Gas Operator | Sep 2025 |
| 21 | Tumble Weed Production Co. | Borger, TX 79008 | Oil & Gas Operator | Dec 1994 |