| 301 | Sunday-Smith Mary E | Mannford, OK 74044-1457 | Oil & Gas Operator | Mar 2015 |
| 302 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 303 | Superior Companies Inc | Bartlesville, OK 74003-2621 | Oil & Gas Operator | May 2013 |
| 304 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 305 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 306 | T And L Oil Inc | Tonkawa, OK 74653-4530 | Oil & Gas Operator | Jan 2024 |
| 307 | T Bar M Energy Resources LLC | | Oil & Gas Operator | Jan 2024 |
| 308 | Taylor Oil Co. | Edmond, OK 73034 | Oil & Gas Operator | Jan 2024 |
| 309 | Tec Pipeline LLC | Tulsa, OK 74128 | Oil & Gas Operator | Mar 2015 |
| 310 | Tec Resources, L.L.C. | Tulsa, OK 74128 | Oil & Gas Operator | May 2013 |
| 311 | Tiger Trucks Inc | Seminole, OK 74868 | Oil & Gas Operator | Feb 2024 |
| 312 | Tonys Crude Oil Reclaiming Plant Inc | | Oil Operator | Jan 2024 |
| 313 | Topco Inc | Tulsa, OK 74105 | Oil & Gas Operator | Nov 2005 |
| 314 | Trackstar Energies LLC | Colorado Springs, CO 80919 | Oil Operator | Mar 2023 |
| 315 | Triple C Properties Inc | Seminole, OK 74818-0481 | Oil & Gas Operator | Jun 2023 |
| 316 | Trout Disposal Well Inc | Hammon, OK 73650-0292 | Oil & Gas Operator | Jul 2016 |
| 317 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742-0247 | Oil & Gas Operator | Feb 2024 |
| 318 | Two Pines | Drumright, OK 74030-5502 | Oil & Gas Operator | Feb 2012 |
| 319 | Vector Exploration Inc | Oklahoma City, OK 73142-4430 | Oil & Gas Operator | Dec 2018 |
| 320 | Vincent Production Company | | Oil & Gas Operator | Dec 2006 |
| 321 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 322 | Wadkins T Roy | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2019 |
| 323 | Walton, W. W. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 1994 |
| 324 | Westamerica Corporation | Dewey, OK 74029-0040 | Oil & Gas Operator | Aug 1999 |
| 325 | Westend Operating LLC | | Oil Operator | Dec 2023 |
| 326 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Feb 2024 |
| 327 | WFD Oil Corporation | Edmond, OK 73012-0619 | Oil & Gas Operator | Feb 2024 |
| 328 | White Alton L Trust | Nowata, OK 74048-0583 | Oil & Gas Operator | Aug 2013 |
| 329 | Wila Inc | | Oil Operator | Dec 2000 |
| 330 | Windward Development LLC | Tulsa, OK 74136-7007 | Oil & Gas Operator | Jul 2019 |
| 331 | Wise Oil & Gas Company LLC | Shawnee, OK 74801-8507 | Oil & Gas Operator | Jan 2024 |
| 332 | Woodward Iodine Corporation | Woodward, OK 73802-1245 | Oil & Gas Operator | Feb 2024 |
| 333 | Woolever Stephen L | Tulsa, OK 74108-2303 | Oil Operator | Jun 2023 |
| 334 | Worstell Oil & Gas Company | Collinsville, OK 74021 | Oil Operator | Nov 2005 |
| 335 | Wyatt'S Oil Corporation | Pawhuska, OK 74056 | Oil & Gas Operator | Jan 2024 |
| 336 | Xanadu Exploration Company | Broken Arrow, OK 74014 | Oil & Gas Operator | Feb 2024 |
| 337 | Yager Company | Hutchinson, KS 67502 | Oil & Gas Operator | Dec 2000 |
| 338 | Yegen E C | Casper, WY 82604 | Oil & Gas Operator | Mar 2015 |
| 339 | Zap Oil Company | Nowata, OK 74048-2640 | Oil & Gas Operator | Nov 2005 |
| 340 | Zimet Brothers Inc | | Oil Operator | Mar 2008 |