| 601 | Subterranean Energy, LLC | Tyler, TX 75705 | Oil & Gas Operator | Apr 2025 |
| 602 | Sudberry Mark E Dba Gushing Oil Co | Trophy Club, TX 76262-5531 | Oil Operator | Jan 2020 |
| 603 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 604 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2025 |
| 605 | Sullivan Jesse G | Duncan, OK 73533 | Oil Operator | May 1998 |
| 606 | Sullivan Nora M | Oklahoma City, OK 73139 | Oil Operator | Jan 1997 |
| 607 | Sullivan Wesley L | Duncan, OK 73533 | Oil & Gas Operator | Mar 2002 |
| 608 | Sullivan, Hollis R. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2009 |
| 609 | Sullivant G W | Oklahoma City, OK 73172-1135 | Oil & Gas Operator | Aug 2001 |
| 610 | Sultex Oil & Gas Inc | Houston, TX 77059-3126 | Oil & Gas Operator | Aug 2002 |
| 611 | Summa Engineering Inc | Oklahoma City, OK 73112-3624 | Oil & Gas Operator | Mar 2015 |
| 612 | Summit Energy, Inc. | Littleton, CO 80127 | Oil & Gas Operator | Aug 2013 |
| 613 | Summit Overseas Expl., Inc. | Denver, CO 80226 | Oil & Gas Operator | Apr 2007 |
| 614 | Summit Resources Management LLC | Edmond, OK 73083 | Oil & Gas Operator | Jan 2025 |
| 615 | Summit Resources, Inc. | Houston, TX 77077 | Oil & Gas Operator | Sep 2016 |
| 616 | Sumrall Sharon | Midland, TX 79705-8238 | Oil & Gas Operator | Apr 2022 |
| 617 | Sun Amer Petro Resources Inc | Moore, OK 73153-7133 | Oil & Gas Operator | May 1993 |
| 618 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 619 | Sunbelt Oil Investments Inc | Lindsay, OK 73052 | Oil & Gas Operator | May 1993 |
| 620 | Suncoast Technical Service Inc | Plano, TX 75074-5438 | Oil Operator | Mar 2005 |
| 621 | Sundance Energy Oklahoma LLC Dba Seo LLC | Denver, CO 80202-3620 | Oil & Gas Operator | Nov 2021 |
| 622 | Sundance Operating Co | | Oil & Gas Operator | Jul 2016 |
| 623 | Sunday-Smith Mary E | Mannford, OK 74044-1457 | Oil & Gas Operator | Mar 2015 |
| 624 | Sundial Energy LLC | Oklahoma City, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 625 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Apr 2025 |
| 626 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2024 |
| 627 | Sunland Enterprises Corp | Norman, OK 73071 | Oil Operator | Sep 2004 |
| 628 | Sunlight Exploration, Inc. | Canyon, TX 79015 | Oil & Gas Operator | Apr 2025 |
| 629 | Sunnybook Transmission Inc | Houston, TX 77002 | Oil & Gas Operator | Oct 1992 |
| 630 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 631 | Sunrise Energy Co | Dallas, TX 75206 | Oil & Gas Operator | Aug 1993 |
| 632 | Sunset Energy L L C | Palm Harbor, FL 34683-3044 | Oil Operator | Dec 2007 |
| 633 | Sunstone Energy Company | Tulsa, OK 74153 | Oil & Gas Operator | Aug 2009 |
| 634 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 635 | Sunwest Oklahoma, Inc | Dallas, TX 75231 | Oil & Gas Operator | May 2023 |
| 636 | Suoco Oil Corporation | Pampa, TX 79066 | Oil & Gas Operator | Apr 2025 |
| 637 | Super Heaters LLC | Houston, TX 77242-1328 | Oil Operator | Mar 2022 |
| 638 | Superior Companies Inc | Bartlesville, OK 74003-2621 | Oil & Gas Operator | May 2013 |
| 639 | Superior Midstream, LLC | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2020 |
| 640 | Superior Oil & Gas Company Of Oklahoma | Calumet, OK 73014-8528 | Oil & Gas Operator | Jan 2024 |
| 641 | Superior Oil & Gas LLC | Ringwood, OK 73768-9658 | Oil & Gas Operator | Feb 2025 |
| 642 | Superior Oil Co. | Denver, CO 80217-5444 | Oil & Gas Operator | Feb 2001 |
| 643 | Superior Production LLC | Ringwood, OK 73768 | Oil & Gas Operator | Feb 2025 |
| 644 | Superior Production MGMT Inc | Calumet, OK 73014 | Oil & Gas Operator | Mar 2015 |
| 645 | Superior Saltwater Disposal LLC | Ringwood, OK 73768 | Oil & Gas Operator | Dec 2016 |
| 646 | Supplyco Inc | Perry, OK 73077 | Oil & Gas Operator | Apr 2014 |
| 647 | Surge Ok Midstream LLC | Oklahoma City, OK 73114 | Oil Operator | Feb 2025 |
| 648 | Survivor Oil Inc | Tulsa, OK 74133 | Oil & Gas Operator | Sep 2007 |
| 649 | Susaect LLC | Houston, TX 77079 | Oil Operator | Jan 2025 |
| 650 | Sutton Eddie L Oil Company | Loco, OK 73442-9701 | Oil Operator | Jan 2025 |
| 651 | Sutton Energy LLC | Ada, OK 74820-8550 | Oil & Gas Operator | Jan 2025 |
| 652 | Sutton Oil Company, LLC | Loco, OK 73442 | Oil Operator | Jan 2025 |
| 653 | Sutton-Munson Oil | Edmond, OK 73034 | Oil & Gas Operator | Jun 1999 |
| 654 | Sutton-Rhoads Exploration Inc | | Oil & Gas Operator | Aug 2005 |
| 655 | Swadley Et Al | Holdenville, OK 74848-0794 | Oil & Gas Operator | Nov 2014 |
| 656 | Swadley Roy W & Judith I | Holdenville, OK 74848-0794 | Oil & Gas Operator | Mar 2015 |
| 657 | Swain Clinton Edward | Ochelata, OK 74051-2220 | Oil Operator | Oct 2024 |
| 658 | Swain, Randall R | | Oil Operator | Aug 2000 |
| 659 | Swan Oil Company | Kellyville, OK 74039-5607 | Oil & Gas Operator | Dec 2023 |
| 660 | Swan Richard N | Claremore, OK 74018-0503 | Oil Operator | Aug 2013 |
| 661 | Swanson Douglas L & Sharon | Bartlesville, OK 74003-9319 | Oil Operator | Jan 2025 |
| 662 | Swanson G T | Duncan, OK 73533 | Oil & Gas Operator | Nov 1998 |
| 663 | Swanson, Tommy Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Mar 2017 |
| 664 | Swearingen Robert E Dba Sabo Production | Seminole, OK 74868 | Oil & Gas Operator | Jan 2025 |
| 665 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Jan 2025 |
| 666 | Swenton, Michael J. | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2025 |
| 667 | Swift A W & Company Inc | Sand Springs, OK 74063-5124 | Oil Operator | Jun 2003 |
| 668 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 669 | Swinea Well Service Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2015 |
| 670 | Swinkwood Oil Co | | Oil Operator | Apr 2015 |
| 671 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 672 | SWS Operating LLC | Lawton, OK 73501-3236 | Oil Operator | Sep 2024 |
| 673 | Sydson D'Oro Expl. Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 1992 |
| 674 | Sylvan Oil Operating Company | Tulsa, OK 74103-3516 | Oil & Gas Operator | Apr 2016 |
| 675 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2025 |