| 601 | Santa Rita Resources Inc & Subs | | Oil & Gas Operator | Mar 2015 |
| 602 | Saucier Oil & Gas LLC | Cement, OK 73017 | Oil Operator | Jan 2025 |
| 603 | Saylor Weldon W | Tulsa, OK 74105-5325 | Gas Operator | Dec 1994 |
| 604 | Scana Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Dec 1999 |
| 605 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 606 | Scana Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2005 |
| 607 | Scott Petroleum, Inc. | Dallas, TX 75244 | Oil & Gas Operator | May 1995 |
| 608 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 609 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 610 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 611 | Seals And Brown Oil Operating | Norman, OK 73072-3020 | Oil & Gas Operator | Sep 2024 |
| 612 | Seals Oil Company | Fox, OK 73435-0222 | Oil & Gas Operator | Nov 2011 |
| 613 | Search Drilling Company | Houston, TX 77010 | Oil & Gas Operator | Feb 2001 |
| 614 | Sequent Exploration Inc | | Oil & Gas Operator | Oct 2017 |
| 615 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 616 | Shell Western Expl & Prod Inc | Houston, TX 77251 | Oil & Gas Operator | Mar 2015 |
| 617 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Dec 2024 |
| 618 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Jan 2025 |
| 619 | Simmons Mack McCoy | Cement, OK 73017 | Oil Operator | Nov 2024 |
| 620 | Skycap Energy, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2025 |
| 621 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 622 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Oct 2024 |
| 623 | Sloan Petroleum Service Inc | Guthrie, OK 73044 | Oil & Gas Operator | Jan 2025 |
| 624 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Mar 2025 |
| 625 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 626 | Sooner Pipe & Supply Corp | | Oil & Gas Operator | Nov 2004 |
| 627 | Sorrels J R Dba Cheyenne Oil Properties | Ponca City, OK 74601 | Oil & Gas Operator | Jul 2022 |
| 628 | Southwest Energy LP | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 629 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Jan 2025 |
| 630 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Jan 2025 |
| 631 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Mar 2025 |
| 632 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | Jan 2025 |
| 633 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 634 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jan 2025 |
| 635 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 636 | Star Oil Company | Wichita, KS 67230 | Oil & Gas Operator | Aug 2024 |
| 637 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Jan 2025 |
| 638 | Stewart K Petroleum Corp | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 639 | Sting Exploration Company | Tulsa, OK 74120 | Oil Operator | Sep 2004 |
| 640 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2024 |
| 641 | Streamline Oil And Gas Inc | Lindsey, OK 73052 | Oil & Gas Operator | Jan 2025 |
| 642 | Stricker Resources Inc | Morris, OK 74445 | Oil & Gas Operator | Dec 2024 |
| 643 | Stride Energy LLC | Piedmont, OK 73078 | Oil & Gas Operator | Jan 2025 |
| 644 | Struck Rock Oil And Gas LLC | Geary, OK 73040 | Oil & Gas Operator | Dec 2024 |
| 645 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 646 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Mar 2025 |
| 647 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Nov 2024 |
| 648 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 649 | Superior Oil & Gas LLC | Ringwood, OK 73768-9658 | Oil & Gas Operator | Jan 2025 |
| 650 | Swan Oil Co | Kellyville, OK 74039-5607 | Oil & Gas Operator | Dec 2023 |
| 651 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Dec 2024 |
| 652 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 653 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 654 | T & D Oil | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 655 | T-D Oil Inc | Cement, OK 73017-0065 | Oil & Gas Operator | May 2020 |
| 656 | T-K Exploration Company | Oklahoma City, OK 73102-7029 | Oil & Gas Operator | Mar 2015 |
| 657 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 658 | Tack Operating LLC | Oklahoma City, OK 73172-1492 | Oil & Gas Operator | Aug 2021 |
| 659 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jan 2025 |
| 660 | Tarrant Tracy Dba Trace Oil | Crescent, OK 73028 | Oil & Gas Operator | Feb 2021 |
| 661 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 662 | TD Operating Inc | Hinton, OK 73047 | Oil & Gas Operator | Jan 2025 |
| 663 | Te-Ray Energy, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Dec 2024 |
| 664 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2025 |
| 665 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Dec 2024 |
| 666 | Templar Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2024 |
| 667 | Tenaska Marketing Ventures | Omaha, NE 68154 | Oil & Gas Operator | Mar 2021 |
| 668 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2024 |
| 669 | Teocalli Exploration LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2025 |
| 670 | Territory Resources LLC | Stillwater, OK 74074-1869 | Oil & Gas Operator | Feb 2025 |
| 671 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 672 | Texaco Exploration And Production Inc | Houston, TX 77236 | Oil & Gas Operator | Nov 2024 |
| 673 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 674 | Texas Mineral Group | Midland, TX 79705 | Oil & Gas Operator | Aug 2013 |
| 675 | Texas Southwest Gas LLC | Tulsa, OK 74121 | Oil & Gas Operator | Oct 2022 |
| 676 | Texinia Oil & Gas Inc. | Dallas, TX 75214 | Oil & Gas Operator | Dec 2024 |
| 677 | Three-N-One | | Oil Operator | Oct 2020 |
| 678 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 679 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 680 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 681 | Total Petroleum Inc | Denver, CO 80201-0500 | Oil & Gas Operator | Nov 2006 |
| 682 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 683 | Tower Wanda L Nations | Oklahoma City, OK 73123 | Oil & Gas Operator | Aug 1996 |
| 684 | Trace Oil & Gas LP | Cement, OK 73017 | Oil & Gas Operator | Dec 2024 |
| 685 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 686 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Jan 2025 |
| 687 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Jan 2025 |
| 688 | Triad Of Oklahoma Inc | | Oil & Gas Operator | Feb 1996 |
| 689 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 690 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2025 |
| 691 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 692 | Troy Energy Operating LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2024 |
| 693 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2025 |
| 694 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2025 |
| 695 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Jan 2025 |
| 696 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 697 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 698 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 699 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 700 | Unit Drilling & Exploration Co | Tulsa, OK 74132-5300 | Oil & Gas Operator | Oct 2024 |