| 201 | Tres Azores Oil & Gas, Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 2003 |
| 202 | Trinity River Energy Oper, LLC | Houston, TX 77008 | Oil & Gas Operator | May 2018 |
| 203 | United Operating, LLC *** | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 204 | Upham, Chester R., Jr. | Mineral Wells, TX 76067 | Oil & Gas Operator | Aug 2001 |
| 205 | Vanco Oil & Gas Corp. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 206 | Vantage Fort Worth Energy LLC | Pittsburgh, PA 15222 | Oil & Gas Operator | Oct 2017 |
| 207 | W.H.D., Inc. | Euless, TX 76039 | Oil & Gas Operator | Aug 1998 |
| 208 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 209 | Wes-Mor Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 210 | West Texas Diversified Interests | Eastland, TX 76448 | Oil & Gas Operator | Jun 2006 |
| 211 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | Mar 2025 |
| 212 | Wilbrook Exploration, Inc. | Lingleville, TX 76461 | Oil & Gas Operator | Aug 2003 |
| 213 | Winslow Operating Company, LLC | Austin, TX 78737 | Oil & Gas Operator | Mar 2025 |
| 214 | Wofford, C. J. | El Campo, TX 77437 | Oil & Gas Operator | Mar 2025 |
| 215 | WTG Exploration Inc | Midland, TX 79705 | Oil & Gas Operator | Dec 2023 |
| 216 | Xstar Resources LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Mar 2025 |
| 217 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Mar 2025 |
| 218 | Yellow Rose Oil & Gas Oper. Inc. | Cisco, TX 76437 | Oil & Gas Operator | Mar 2025 |
| 219 | Zoe Oil & Energy, LP | Fort Worth, TX 76148 | Oil & Gas Operator | Mar 2025 |