| 301 | Stonebriar Oil LLC | Frisco, TX 75034 | Oil & Gas Operator | Apr 2024 |
| 302 | Stonewall Production Company Inc | Tyler, TX 75702 | Oil & Gas Operator | Aug 2009 |
| 303 | Strago Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Aug 1994 |
| 304 | Strand Energy, L.C. | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 305 | Summit Resources MGMT., LLC. | Edmond, OK 73083 | Oil & Gas Operator | Apr 2024 |
| 306 | Sunland Production Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2024 |
| 307 | Tactical Operating Company, LLC | Houston, TX 77042 | Oil & Gas Operator | Apr 2024 |
| 308 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 309 | Tanos Exploration, LLC | Houston, TX 77010 | Oil & Gas Operator | Oct 2018 |
| 310 | Taubert & Steed | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2001 |
| 311 | Teco Operating Company | Athens, TX 75751 | Oil & Gas Operator | Jun 2001 |
| 312 | Texeast Operating Co., Inc. | Farmers BRNCH, TX 75234 | Oil Operator | Apr 2024 |
| 313 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 314 | Texlan Oil Company, L.C. | Tyler, TX 75711 | Oil & Gas Operator | Aug 2003 |
| 315 | Three D Submersible Pumps, Inc. | Heavener, OK 74937 | Oil & Gas Operator | Aug 2003 |
| 316 | Tola Production Company | Dallas, TX 75367 | Oil & Gas Operator | Apr 2024 |
| 317 | Tracy Production | Lindale, TX 75771 | Oil & Gas Operator | Apr 2024 |
| 318 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Apr 2024 |
| 319 | Tri-State Exploration & Prod Inc | Marshall, TX 75671 | Oil & Gas Operator | Aug 2003 |
| 320 | Tri-State Resources, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Sep 2012 |
| 321 | Triple J Investments Inc | Longview, TX 75606 | Oil & Gas Operator | Feb 2023 |
| 322 | TTK Energy LLC | Kilgore, TX 75663 | Oil Operator | Apr 2024 |
| 323 | TXX Operating LLC | Shreveport, LA 71133 | Oil & Gas Operator | Apr 2024 |
| 324 | Ultra Oil & Gas, Inc. | Centerton, AR 72719 | Oil & Gas Operator | Apr 2024 |
| 325 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 326 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 327 | Upstream Properties, LLC | Southlake, TX 76092 | Oil & Gas Operator | Apr 2024 |
| 328 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Apr 2024 |
| 329 | Vanco Oil & Gas Corp. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 330 | Vanguard Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2021 |
| 331 | Vaughn Petroleum, Inc. | Dallas, TX 75219 | Oil & Gas Operator | May 2004 |
| 332 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Jan 2024 |
| 333 | Viola Production Inc | Dallas, TX 75251 | Oil & Gas Operator | Apr 2024 |
| 334 | Vogo, Inc. | Blaine, WA 98230 | Oil Operator | Apr 2024 |
| 335 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 336 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Feb 2024 |
| 337 | White Rock Exploration, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jul 2021 |
| 338 | Wilson - Owens Production Co. | Longview, TX 75601 | Oil & Gas Operator | Nov 1998 |
| 339 | Wilson, David A. | Longview, TX 75606 | Oil & Gas Operator | Mar 1997 |
| 340 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 341 | Wisenbaker Production Company | Tyler, TX 75702 | Oil & Gas Operator | Oct 2011 |
| 342 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |
| 343 | Woods Operating Co., Inc. | Shreveport, LA 71136 | Oil & Gas Operator | Dec 2020 |
| 344 | WTXR Operating (Texas), Inc. | Carrollton, TX 75007 | Oil Operator | Apr 2024 |
| 345 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 346 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |