| 601 | Simasko Production Co | Denver, CO 80204 | Oil & Gas Operator | Nov 1997 |
| 602 | Siven Crude Oil Company | Lomita, CA 90717 | Oil & Gas Operator | Apr 2018 |
| 603 | Six "E" Trading Company | Allen, OK 74825-0346 | Oil & Gas Operator | Sep 2020 |
| 604 | Slavens II Paul R | Tulsa, OK 74131-2244 | Oil & Gas Operator | Jan 2024 |
| 605 | Slick Production Inc | Tulsa, OK 74132-1718 | Oil & Gas Operator | Apr 2020 |
| 606 | Slim Hole Inc | Farmington, NM 87401-7725 | Oil & Gas Operator | May 2013 |
| 607 | Smith Max Dean | Wewoka, OK 74884-1333 | Oil & Gas Operator | Oct 2023 |
| 608 | Smith Petroleum Company | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 609 | SNR Operating, LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2024 |
| 610 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 611 | Sonata Oil & Gas Corp Inc | Stratford, OK 74812 | Oil & Gas Operator | Apr 2014 |
| 612 | Sopac Exploration Inc | Drumright, OK 74030 | Oil & Gas Operator | Jun 1993 |
| 613 | Southern Operating Corporation | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 614 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 615 | Southwest Exploration Company | Oklahoma City, OK 73132-2230 | Oil & Gas Operator | Jun 2017 |
| 616 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | Feb 2024 |
| 617 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Jan 2024 |
| 618 | Sparlin J L | Oklahoma City, OK 73156-1446 | Oil Operator | Jan 2024 |
| 619 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2024 |
| 620 | Sperry R J | Dallas, TX 75254-8647 | Oil & Gas Operator | Aug 2013 |
| 621 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Feb 2024 |
| 622 | Spring Operating Company | Edmond, OK 73083-2048 | Oil & Gas Operator | Feb 2024 |
| 623 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 624 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 625 | Stargas Co | Tulsa, OK 74136-5407 | Oil & Gas Operator | Aug 2013 |
| 626 | Stokes Donna L | Blanchard, OK 73010-0364 | Oil & Gas Operator | Jun 2023 |
| 627 | Stover Company | Tulsa, OK 74152-0786 | Oil & Gas Operator | Jan 2013 |
| 628 | STP Cherokee, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2014 |
| 629 | Striker Management Co LLC | Shawnee, OK 74801 | Oil & Gas Operator | Jan 2024 |
| 630 | Sturman Jay R | Mounds, OK 74047-0004 | Oil & Gas Operator | Jul 2023 |
| 631 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 632 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Apr 2024 |
| 633 | Sunland Enterprises Corp | Norman, OK 73071 | Oil Operator | Sep 2004 |
| 634 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 635 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 636 | Swadley Et Al | Holdenville, OK 74848-0794 | Oil & Gas Operator | Nov 2014 |
| 637 | Swadley Roy W & Judith I | Holdenville, OK 74848-0794 | Oil & Gas Operator | Mar 2015 |
| 638 | Sydson D'Oro Expl. Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 1992 |
| 639 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2024 |
| 640 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 641 | Tag Operating Company, Inc. | Houston, TX 77092 | Oil & Gas Operator | Apr 2024 |
| 642 | Tag Team Resources LLC | Eufaula, OK 74432-0841 | Oil & Gas Operator | Jan 2024 |
| 643 | Tarwater Oil & Gas LLC | | Oil & Gas Operator | Dec 2023 |
| 644 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 645 | Taylor International Inc | Drumright, OK 74030-1173 | Oil & Gas Operator | Mar 2020 |
| 646 | Tcina Inc | Seminole, OK 74818-0470 | Oil & Gas Operator | May 2023 |
| 647 | Terra Production Company | Okemah, OK 74859-5924 | Oil & Gas Operator | Apr 2020 |
| 648 | Terrapin Energy LLC | Mountain VIew, CA 94043-2356 | Oil Operator | Feb 2024 |
| 649 | Terry Production Co | Stroud, OK 74079-0475 | Oil & Gas Operator | Aug 2008 |
| 650 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Dec 2023 |
| 651 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 652 | Texas Crude Exploration, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Aug 1992 |
| 653 | Texas Energy Mutual LLC | | Oil Operator | Jun 2018 |
| 654 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 655 | The KT Oil Company LLC | | Oil Operator | Jan 2024 |
| 656 | The Quintin Little Company Inc | Ardmore, OK 73402-1509 | Oil & Gas Operator | Feb 2024 |
| 657 | The Warren Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2016 |
| 658 | The William R Earnhardt Company | Bristow, OK 74010-1114 | Oil & Gas Operator | Jan 2024 |
| 659 | Thomas E L | Tulsa, OK 74136-6302 | Oil & Gas Operator | Feb 2015 |
| 660 | Thomas Exploration Company | Tulsa, OK 74136-6302 | Oil & Gas Operator | Feb 2024 |
| 661 | Thomas Wayne Oil & Gas | Bristow, OK 74010-0544 | Oil & Gas Operator | Jan 2018 |
| 662 | Three MG Family Inc | Holdenville, OK 74848 | Oil & Gas Operator | May 2013 |
| 663 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 664 | Tiger Oil Company | Dallas, TX 75221 | Oil & Gas Operator | May 2007 |
| 665 | Tiger Trucks Inc | Seminole, OK 74868 | Oil & Gas Operator | Feb 2024 |
| 666 | Tolson Gary | Seminole, OK 74868-3267 | Oil & Gas Operator | Jan 2024 |
| 667 | Tonys Crude Oil Reclaiming Plant Inc | | Oil Operator | Jan 2024 |
| 668 | Topsail Secondary Recovery LLC | | Oil & Gas Operator | Feb 2024 |
| 669 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 670 | Tower Wanda L Nations | Oklahoma City, OK 73123 | Oil & Gas Operator | Aug 1996 |
| 671 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Feb 2024 |
| 672 | Trailblazer Energy LLC | Plano, TX 75075 | Oil & Gas Operator | Feb 2024 |
| 673 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 674 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Jan 2024 |
| 675 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Jan 2024 |
| 676 | Trio Operating Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2006 |
| 677 | Triple C Properties Inc | Seminole, OK 74818-0481 | Oil & Gas Operator | Jun 2023 |
| 678 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 679 | Trout Disposal Well Inc | Hammon, OK 73650-0292 | Oil & Gas Operator | Jul 2016 |
| 680 | TRP-Ok Properties LLC | | Oil & Gas Operator | Feb 2024 |
| 681 | Tru Operating LLC | | Oil & Gas Operator | Apr 2023 |
| 682 | True Performance Administrators LLC | | Oil & Gas Operator | Jan 2024 |
| 683 | Tulsa Energy Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2013 |
| 684 | Tulsa Minerals Inc | Tulsa, OK 74136-1045 | Oil & Gas Operator | May 2013 |
| 685 | Tuscany Operating LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2014 |
| 686 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 687 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 688 | Union Resources Inc | | Oil & Gas Operator | Dec 1996 |
| 689 | United Energy & Expl Inc | Ada, OK 74821-2449 | Oil & Gas Operator | Jan 2024 |
| 690 | United Energy & Exploration LLC | Ada, OK 74821 | Oil & Gas Operator | Jan 2024 |
| 691 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Jan 2024 |
| 692 | United Primary Resources Inc | Milton, WA 98354-9361 | Oil & Gas Operator | Feb 2016 |
| 693 | United States Trading & Trans | Dallas, TX 75380-3342 | Oil & Gas Operator | Dec 1994 |
| 694 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Apr 2024 |
| 695 | Valancy Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 696 | Valley Oil & Gas Inc | | Oil & Gas Operator | Nov 2013 |
| 697 | Van Horn Oil Company | Ada, OK 74820 | Oil & Gas Operator | Oct 1999 |
| 698 | Van Orsdol Paul | Bristow, OK 74010 | Oil & Gas Operator | Dec 2023 |
| 699 | Venis Exploration Company | Aledo, TX 76008-1817 | Oil & Gas Operator | Jan 2024 |
| 700 | Veteran Exploration & Prod, LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |