| 601 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 602 | Snyder Partners | Cody, WY 82414 | Oil & Gas Operator | Sep 2024 |
| 603 | Sooner Oil & Gas | Fairview, OK 73737-1806 | Oil & Gas Operator | Sep 2024 |
| 604 | Sooner Trend Exploration Inc | Kingfisher, OK 73750-4752 | Oil & Gas Operator | Dec 2015 |
| 605 | Southerland Marquieta Dba Keta Oil Company | Loco, OK 73442-1815 | Oil & Gas Operator | Aug 2024 |
| 606 | Southern Resources Inc | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Sep 2024 |
| 607 | Southwest Energy LP | Houston, TX 77002 | Oil & Gas Operator | Aug 2024 |
| 608 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 609 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Sep 2024 |
| 610 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 611 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 612 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2024 |
| 613 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Sep 2024 |
| 614 | Staghorn Petroleum LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Aug 2024 |
| 615 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 616 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 617 | Star Resources LLC | Englewood, CO 80155-5185 | Oil & Gas Operator | Dec 2013 |
| 618 | Statoil Oil & Gas LP | Austin, TX 78730 | Oil & Gas Operator | Oct 2018 |
| 619 | Stephen Michael Inc | Midwest City, OK 73130-5200 | Oil & Gas Operator | Oct 2015 |
| 620 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Sep 2024 |
| 621 | Stewart K Petroleum Corp | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 622 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Nov 2024 |
| 623 | Struck Rock Oil And Gas LLC | Geary, OK 73040 | Oil & Gas Operator | Jul 2024 |
| 624 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 625 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Aug 2024 |
| 626 | Summit Resources Management LLC | Edmond, OK 73083 | Oil & Gas Operator | Aug 2024 |
| 627 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 628 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 629 | Superior Oil & Gas Company Of Oklahoma | Calumet, OK 73014-8528 | Oil & Gas Operator | Jan 2024 |
| 630 | Sutton Energy LLC | Ada, OK 74820-8550 | Oil & Gas Operator | Sep 2024 |
| 631 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Aug 2024 |
| 632 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 633 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 634 | Tack Operating LLC | Oklahoma City, OK 73172-1492 | Oil & Gas Operator | Aug 2021 |
| 635 | Tamworth Resources LLC | Broken Arrow, OK 74012 | Oil & Gas Operator | Aug 2024 |
| 636 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Sep 2024 |
| 637 | Tarrant Tracy Dba Trace Oil | Crescent, OK 73028 | Oil & Gas Operator | Feb 2021 |
| 638 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 639 | Tcina Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2023 |
| 640 | Te-Ray Energy, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Aug 2024 |
| 641 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2024 |
| 642 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Aug 2024 |
| 643 | Templar Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2024 |
| 644 | Tenaska Marketing Ventures | Omaha, NE 68154 | Oil & Gas Operator | Mar 2021 |
| 645 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Aug 2024 |
| 646 | Teocalli Exploration LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Sep 2024 |
| 647 | Tessera Energy LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Aug 2024 |
| 648 | Testco Production Company | Watonga, OK 73772-0589 | Oil & Gas Operator | Aug 2013 |
| 649 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Jul 2024 |
| 650 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 651 | Texas Southwest Gas LLC | Tulsa, OK 74121 | Oil & Gas Operator | Oct 2022 |
| 652 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Sep 2024 |
| 653 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 654 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 655 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 656 | Tilley Oil & Gas, Inc. | Oklahoma City, OK 73172 | Oil & Gas Operator | Nov 2024 |
| 657 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Sep 2024 |
| 658 | TLS Oil & Gas Inc | Kingfisher, OK 73750-0901 | Oil & Gas Operator | Sep 2024 |
| 659 | Toklan Oil Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 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 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 663 | Trace Oil & Gas LP | Cement, OK 73017 | Oil & Gas Operator | Aug 2024 |
| 664 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Sep 2024 |
| 665 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Nov 2024 |
| 666 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Sep 2024 |
| 667 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 668 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 669 | Triumph Energy Partners LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Aug 2024 |
| 670 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 671 | Troy Energy Operating LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Sep 2024 |
| 672 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Sep 2024 |
| 673 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Aug 2024 |
| 674 | Tuthill S Keith & Bill Barbee | Amarillo, TX 79101-1427 | Oil & Gas Operator | Dec 2004 |
| 675 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Sep 2024 |
| 676 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 677 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 678 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 679 | Unbridled Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 680 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 681 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2024 |
| 682 | United Energy Operating, LLC | Edmond, OK 73083 | Oil & Gas Operator | Nov 2024 |
| 683 | United Energy Trading LLC | Tulsa, OK 74133 | Gas Operator | Feb 2015 |
| 684 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Aug 2024 |
| 685 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Nov 2024 |
| 686 | Validus Energy II Midcon LLC | Denever, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 687 | Valjohn Energy Corporation | Oklahoma City, OK 73142-6090 | Oil & Gas Operator | Aug 2024 |
| 688 | Valpoint Operating, LLC | Amarillo, TX 79101 | Oil & Gas Operator | Nov 2024 |
| 689 | Vanderbilt Resources Corp | Midland, TX 79701 | Oil & Gas Operator | Nov 1991 |
| 690 | Vantage Point Operating Co | Houston, TX 77057 | Oil & Gas Operator | Dec 2014 |
| 691 | Vega Energy Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Sep 2015 |
| 692 | Ventana Exploration And Production II LLC | Oklahoma City, OK 73134-2519 | Oil & Gas Operator | Sep 2024 |
| 693 | Viersen & Cochran Drilling Company | | Oil & Gas Operator | May 2015 |
| 694 | Vintage Gas Inc | Tulsa, OK 74119-1029 | Oil & Gas Operator | Jun 2007 |
| 695 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Aug 2024 |
| 696 | Vitol Inc | Houston, TX 77002 | Oil & Gas Operator | Sep 2023 |
| 697 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 698 | Waggoner Oil & Gas Corp | Enid, OK 73703-1152 | Oil & Gas Operator | Sep 2024 |
| 699 | Wagner & Brown | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 700 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2024 |