| 401 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 402 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 403 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 404 | Sutton Energy LLC | | Oil & Gas Operator | Jan 2024 |
| 405 | Sutton Oil Company, LLC | Loco, OK 73442 | Oil Operator | Jan 2024 |
| 406 | Swadley Roy W & Judith I | Holdenville, OK 74848-0794 | Oil & Gas Operator | Mar 2015 |
| 407 | Swenton, Michael J. | Tulsa, OK 74105 | Oil & Gas Operator | Dec 2023 |
| 408 | T & J Operating | Ada, OK 74821-1547 | Oil Operator | Feb 2012 |
| 409 | T & K Oil Inc | Stephens, AR 71764 | Oil Operator | Dec 2023 |
| 410 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 411 | Talbert, Eugene Operating Co,Inc | Tyler, TX 75702 | Oil & Gas Operator | Dec 1997 |
| 412 | Tandem Oil Inc | Oklahoma City, OK 73139 | Oil & Gas Operator | Oct 1998 |
| 413 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 414 | Ten Grand Energy Company Inc | Nachogdoches, TX 75963-1880 | Oil Operator | Mar 2011 |
| 415 | Terry Jack | Konawa, OK 74849-0337 | Oil Operator | Feb 2012 |
| 416 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 417 | Texakoma Operating, L.P. | Plano, TX 75024 | Oil & Gas Operator | Apr 2024 |
| 418 | Texas United Petroleum Inc | Dallas, TX 75243 | Oil & Gas Operator | Jun 2003 |
| 419 | The KT Oil Company LLC | | Oil Operator | Jan 2024 |
| 420 | The Twenty Eleven Corp Inc | Ada, OK 74820-3605 | Oil Operator | Jan 2024 |
| 421 | The William R Earnhardt Company | Bristow, OK 74010-1114 | Oil & Gas Operator | Dec 2023 |
| 422 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 423 | Tidwell Oil LLC | Roff, OK 74865-0250 | Oil Operator | Feb 2022 |
| 424 | Tiger Oil Company | Dallas, TX 75221 | Oil & Gas Operator | May 2007 |
| 425 | Tiger Trucks Inc | Seminole, OK 74868 | Oil & Gas Operator | Jan 2024 |
| 426 | TKL Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | Dec 2023 |
| 427 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2024 |
| 428 | Tonys Crude Oil Reclaiming Plant Inc | | Oil Operator | Dec 2023 |
| 429 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 430 | Tracy & Associates Inc | Ada, OK 74820 | Oil & Gas Operator | Apr 2014 |
| 431 | Triangle Interprises Inc | Justin, TX 76247-0598 | Oil & Gas Operator | Jun 2015 |
| 432 | Trinity Oil & Gas Producers LLC | | Oil & Gas Operator | Dec 2023 |
| 433 | Triple C Properties Inc | Seminole, OK 74818-0481 | Oil & Gas Operator | Jun 2023 |
| 434 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 435 | Trout Disposal Well Inc | Hammon, OK 73650-0292 | Oil & Gas Operator | Jul 2016 |
| 436 | True Performance Administrators LLC | | Oil & Gas Operator | Dec 2023 |
| 437 | Truevine Operating LLC | Ada, OK 74821-1422 | Oil & Gas Operator | Dec 2023 |
| 438 | Turpin Ledon Production | Ada, OK 74820-0549 | Oil Operator | Jan 2024 |
| 439 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2024 |
| 440 | United Energy & Expl Inc | Ada, OK 74821-2449 | Oil & Gas Operator | Jan 2024 |
| 441 | United Energy & Exploration LLC | Ada, OK 74821 | Oil & Gas Operator | Jan 2024 |
| 442 | United Production Company LLC | Edmond, OK 73083-5348 | Oil & Gas Operator | Jan 2024 |
| 443 | United States Trading & Trans | Dallas, TX 75380-3342 | Oil & Gas Operator | Dec 1994 |
| 444 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Apr 2024 |
| 445 | Van Horn Oil Company | Ada, OK 74820 | Oil & Gas Operator | Oct 1999 |
| 446 | Vaughan III Ben F | Austin, TX 78768-2233 | Oil & Gas Operator | Jan 2024 |
| 447 | Victory Petroleum Inc | Tulsa, OK 74170-0354 | Oil & Gas Operator | May 2013 |
| 448 | Vitol Inc | Houston, TX 77098 | Oil & Gas Operator | Sep 2023 |
| 449 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 450 | Walden E F | Ada, OK 74820 | Oil & Gas Operator | Aug 2014 |
| 451 | Walker Keith F | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2019 |
| 452 | Ward Oil Company An Okla Corp | McAlester, OK 74501 | Oil & Gas Operator | Feb 1993 |
| 453 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Dec 2023 |
| 454 | Watkins J L | Morris, OK 74445-0325 | Oil & Gas Operator | Jan 2024 |
| 455 | Weatherly Nell M Estate | Ada, OK 74821-0669 | Oil & Gas Operator | Feb 1997 |
| 456 | Welch Family Trust | Ada, OK 74820-9643 | Oil & Gas Operator | Apr 2015 |
| 457 | Wells Jimme D | Ponca City, OK 74604 | Oil Operator | Jan 2024 |
| 458 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Jan 2024 |
| 459 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Jan 2024 |
| 460 | White Oak Production Company | Conway, AR 72034 | Oil & Gas Operator | Sep 2005 |
| 461 | Whittington Curtis | Stonewall, OK 74871-0482 | Oil & Gas Operator | Feb 2011 |
| 462 | Wildcat Cement Co. | Shamrock, TX 79079 | Oil & Gas Operator | May 2015 |
| 463 | Williams Brothers Engineering Company | Tulsa, OK 74134-5885 | Oil & Gas Operator | May 2013 |
| 464 | Williams Petroleum Company, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Apr 2024 |
| 465 | Windward Development LLC | Tulsa, OK 74136-7007 | Oil & Gas Operator | Jul 2019 |
| 466 | Woodward Iodine Corporation | Woodward, OK 73802-1245 | Oil & Gas Operator | Jan 2024 |
| 467 | Worldwide Energy Corp. | Freer, TX 78357 | Oil & Gas Operator | Jan 1997 |
| 468 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 469 | Younger Enterprises Inc | Ada, OK 74821-1882 | Oil Operator | Jan 2003 |
| 470 | Zimet Brothers Inc | | Oil Operator | Mar 2008 |
| 471 | Zzron Inc. | Midland, TX 79704 | Oil & Gas Operator | Aug 2003 |