| 601 | Southwest Energy LP | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 602 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 603 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2024 |
| 604 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Feb 2024 |
| 605 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Apr 2024 |
| 606 | Spring Operating Company | Edmond, OK 73083-2048 | Oil & Gas Operator | Feb 2024 |
| 607 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 608 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 609 | Staghorn Petroleum II LLC | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 610 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 611 | Stargas Co | Tulsa, OK 74136-5407 | Oil & Gas Operator | Aug 2013 |
| 612 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 613 | Stephen Michael Inc | Midwest City, OK 73130-5200 | Oil & Gas Operator | Oct 2015 |
| 614 | Stephens Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Feb 2024 |
| 615 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2024 |
| 616 | Stevenson Oil Company, Inc. | Lovington, NM 88260 | Oil & Gas Operator | Feb 2024 |
| 617 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 618 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 619 | Stumpff Paul | Bartlesville, OK 74006-3426 | Oil & Gas Operator | Mar 2015 |
| 620 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2024 |
| 621 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Apr 2024 |
| 622 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2023 |
| 623 | Sunnybook Transmission Inc | Houston, TX 77002 | Oil & Gas Operator | Oct 1992 |
| 624 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 625 | Sunrise Energy Co | Dallas, TX 75206 | Oil & Gas Operator | Aug 1993 |
| 626 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 627 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 628 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Jan 2024 |
| 629 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 630 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 631 | Sydson D'Oro Expl. Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 1992 |
| 632 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 633 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2024 |
| 634 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 635 | Tcina Inc | Seminole, OK 74818-0470 | Oil & Gas Operator | May 2023 |
| 636 | Tekenergy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 637 | Tema Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2009 |
| 638 | Temex Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 639 | Tenaska Marketing Ventures | Omaha, NE 68154 | Oil & Gas Operator | Mar 2021 |
| 640 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Nov 2023 |
| 641 | Teocalli Exploration LLC | | Oil & Gas Operator | Feb 2024 |
| 642 | Tex-Ok Energy LP | Cody, WY 82414-5915 | Oil & Gas Operator | Mar 2024 |
| 643 | Tex-Star Production | Dallas, TX 75360-0577 | Oil & Gas Operator | Feb 2024 |
| 644 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 645 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Dec 2023 |
| 646 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 647 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 648 | Texas Mineral Group | Midland, TX 79705 | Oil & Gas Operator | Aug 2013 |
| 649 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 650 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 651 | The Warren Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2016 |
| 652 | Three-D Resources, Inc. | Liberal, KS 67905 | Oil & Gas Operator | Dec 2023 |
| 653 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 654 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 655 | Tiger Trucks Inc | Seminole, OK 74868 | Oil & Gas Operator | Feb 2024 |
| 656 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Mar 2024 |
| 657 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2024 |
| 658 | Toklan Oil Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 659 | Tonys Crude Oil Reclaiming Plant Inc | | Oil Operator | Jan 2024 |
| 660 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 661 | Total Petroleum Inc | Denver, CO 80201-0500 | Oil & Gas Operator | Nov 2006 |
| 662 | Tower Energy Corporation | Sapulpa, OK 74067-0837 | Oil & Gas Operator | Mar 2015 |
| 663 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Feb 2024 |
| 664 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 665 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Apr 2024 |
| 666 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Jan 2024 |
| 667 | Triple C Properties Inc | Seminole, OK 74818-0481 | Oil & Gas Operator | Jun 2023 |
| 668 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 669 | Trivestco Energy Company | Ponca City, OK 74601 | Oil & Gas Operator | Feb 2024 |
| 670 | Trout Disposal Well Inc | Hammon, OK 73650-0292 | Oil & Gas Operator | Jul 2016 |
| 671 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Feb 2024 |
| 672 | Turner Oil Company | Yale, OK 74085-0234 | Oil & Gas Operator | Nov 2014 |
| 673 | Tuthill S Keith & Bill Barbee | Amarillo, TX 79101-1427 | Oil & Gas Operator | Dec 2004 |
| 674 | Twisted Resources Inc | | Oil & Gas Operator | Feb 2024 |
| 675 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 676 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 677 | Tyson Olan | Hobart, OK 73651-6413 | Oil & Gas Operator | Apr 2015 |
| 678 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 679 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 680 | Union Valley Petroleum Corporation | Enid, OK 73701 | Oil & Gas Operator | Feb 2024 |
| 681 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |
| 682 | United Energy Operating, LLC | Edmond, OK 73083 | Oil & Gas Operator | Apr 2024 |
| 683 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Jan 2024 |
| 684 | United Production Company LLC | Edmond, OK 73083-5348 | Oil & Gas Operator | Feb 2024 |
| 685 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Apr 2024 |
| 686 | Valero Marketing & Supply Co | San Antonio, TX 78269-6000 | Oil & Gas Operator | Sep 2023 |
| 687 | Vanderbilt Resources Corp. | Midland, TX 79701 | Oil & Gas Operator | Nov 1991 |
| 688 | Vantage Point Operating Co | Houston, TX 77057 | Oil & Gas Operator | Dec 2014 |
| 689 | Veenker Resources, Inc. | Oklahoma City, OK 73113 | Oil & Gas Operator | Feb 2024 |
| 690 | Viersen & Cochran Drilling Company | | Oil & Gas Operator | May 2015 |
| 691 | Vintage Gas Inc | Tulsa, OK 74119-1029 | Oil & Gas Operator | Jun 2007 |
| 692 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Jan 2024 |
| 693 | Vistatex Energy LLC | Houston, TX 77057 | Oil & Gas Operator | Jan 2024 |
| 694 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 695 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 696 | Washita Oil And Gas, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 697 | Washita Production Company | Tulsa, OK 74136 | Oil & Gas Operator | May 2006 |
| 698 | Western Farmers Electric Coop | Anadarko, OK 73005-0429 | Oil & Gas Operator | Apr 2012 |
| 699 | Western Gas Resources Inc | Denver, CO 80202-1955 | Oil & Gas Operator | Dec 2007 |
| 700 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Feb 2024 |