| 601 | Schultz Run Gas Company | | Oil & Gas Operator | Dec 2021 |
| 602 | Schulz Oil & Gas, Inc. | Canton, KS 67428 | Oil & Gas Operator | Dec 2024 |
| 603 | Schulz Roger A | | Oil & Gas Operator | Dec 1996 |
| 604 | Schupp, David And Barbara | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 605 | Schuster Homes Inc | Rangely, CO 81648 | Oil & Gas Operator | Apr 2013 |
| 606 | Schutz* Richard E | | Oil Operator | Feb 2026 |
| 607 | Schwab City Resources | Leggett, TX 77350 | Oil & Gas Operator | Aug 2013 |
| 608 | Schwanco Inc | Cleveland, OH 44115 | Oil & Gas Operator | Dec 1987 |
| 609 | Schweder Richard E | Lakeville, OH 44638 | Oil & Gas Operator | Dec 2009 |
| 610 | Schweikert, Donna C. | Springville, NY 14141 | Gas Operator | Dec 2024 |
| 611 | Schwertfeger, Donald E. Oil | Preston, KS 67569 | Oil Operator | Jan 1999 |
| 612 | Schwien Tank & Lease Service Inc | Bazine, KS 67516 | Oil Operator | May 2000 |
| 613 | Scimitar Resc Li | | Oil Operator | Oct 1982 |
| 614 | Scion Energy Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2019 |
| 615 | Scissortail Energy LLC | Tulsa, OK 74137-3644 | Oil & Gas Operator | Mar 2026 |
| 616 | Scissortail Exploration & Production, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 617 | Sco Permian, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2026 |
| 618 | Scoggins Oil & Gas Co. | Seabrook, TX 77586 | Oil & Gas Operator | Jun 2000 |
| 619 | Scoggins Production Company | Cleo Springs, OK 73729-9732 | Oil & Gas Operator | May 2022 |
| 620 | Scoggins Production LLC | Enid, OK 73703-3002 | Oil & Gas Operator | Mar 2026 |
| 621 | Scogin Exploration Inc | | Oil & Gas Operator | Dec 1999 |
| 622 | Scope Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2003 |
| 623 | Scorpio Energy Inc | Sheffield, PA 16347-0929 | Oil & Gas Operator | Dec 2025 |
| 624 | Scorpion Oil & Gas, LLC | Houston, TX 77036 | Oil & Gas Operator | May 2025 |
| 625 | Scorpion Operating, Inc. | Benavides, TX 78341 | Oil Operator | Jun 2026 |
| 626 | Scott Banes Scott Family Partnership | | Oil Operator | Nov 2025 |
| 627 | Scott Branson | Carlsbad, NM 88221 | Oil & Gas Operator | Oct 2017 |
| 628 | Scott John S | Copan, OK 74022-5904 | Oil Operator | Apr 2005 |
| 629 | Scott Oil Company | Corsicana, TX 75110 | Oil & Gas Operator | Apr 2011 |
| 630 | Scott Operating, Inc. | Albany, TX 76430 | Oil & Gas Operator | Jun 2026 |
| 631 | Scott Petroleum, Inc. | Dallas, TX 75244 | Oil & Gas Operator | May 1995 |
| 632 | Scott Services LLC | Plainville, KS 67663 | Oil Operator | Feb 2026 |
| 633 | Scott SR Kermit | Okarche, OK 73762 | Oil & Gas Operator | Mar 2015 |
| 634 | Scott W. Brumley | | Oil Operator | Apr 2011 |
| 635 | Scott Wayne Oil Co | Haxton, CO 80731 | Oil & Gas Operator | Apr 2020 |
| 636 | Scott Works LLC | | Oil Operator | Jan 2026 |
| 637 | Scott'S Peek 'N Peak, LLC | Erie, PA 16509 | Gas Operator | Dec 2024 |
| 638 | Scott'S Production, LLC | Roxbury, KS 67476 | Oil Operator | Feb 2026 |
| 639 | Scott'S Well Service Inc | Roxbury, KS 67476 | Oil Operator | Nov 2012 |
| 640 | Scott, Stephen | Olney, TX 76374 | Oil Operator | Oct 2011 |
| 641 | Scott, Steve Engineering | Midland, TX 79710 | Oil & Gas Operator | Apr 2005 |
| 642 | Scout Energy Corporation | Edmond, OK 73083-1348 | Oil & Gas Operator | Feb 2026 |
| 643 | Scout Energy LTD Liability Co | Inez, TX 77968 | Oil & Gas Operator | Jun 2026 |
| 644 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Jun 2026 |
| 645 | Scranton Exploration | Eastland, TX 76448 | Oil & Gas Operator | Jun 2026 |
| 646 | Scribner, Jeff | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2004 |
| 647 | Scrimgeour Robert | Sterling, VA 22170 | Oil & Gas Operator | Dec 1991 |
| 648 | Scriven, Daniel | Ripley, NY 14775 | Gas Operator | Dec 2024 |
| 649 | Scroggins, Bruce E. | Gilmer, TX 75645 | Oil & Gas Operator | Aug 2004 |
| 650 | SCS Newton Oil LLC | Perryton, TX 79070 | Oil & Gas Operator | Jun 2026 |
| 651 | Scully And Smith Oil Corporation | Salado, TX 76571 | Oil & Gas Operator | Feb 1995 |
| 652 | Scully Energy Corporation | Salado, TX 76571 | Oil & Gas Operator | Mar 2012 |
| 653 | Scurlock Oil Co | | Oil Operator | May 1982 |
| 654 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 655 | SCZ Resources, LLC | Houston, TX 77055 | Oil Operator | Feb 2026 |
| 656 | SD Royale Energy, Inc. | San Diego, CA 92159 | Oil & Gas Operator | Jun 2026 |
| 657 | SDB Oil & Gas, LLC | Pasadena, TX 77502 | Oil Operator | Jun 2026 |
| 658 | SDG Operating Company, Inc | Tyler, TX 75701 | Oil & Gas Operator | Jun 2026 |
| 659 | SDG Resources L.P. | Montrose, CO 81402 | Oil & Gas Operator | May 2006 |
| 660 | SDG Services LLC | Kilgore, TX 75663 | Oil Operator | Sep 2025 |
| 661 | SDMB Resources LLC | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 662 | Sdoco, LLC | Highlands Ranch, CO 80129 | Oil Operator | Dec 2025 |
| 663 | SDX Resources, Inc. | Midland, TX 79704 | Oil & Gas Operator | Jun 2026 |
| 664 | Se USA Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2009 |
| 665 | Sea Eagle Ford, LLC | Denver, CO 80265 | Oil & Gas Operator | Jun 2022 |
| 666 | Sea Sand Oil Company | Fort Worth, TX 76185 | Oil & Gas Operator | Jun 1995 |
| 667 | Seaboard Gas Company | Edmond, OK 73034 | Oil & Gas Operator | Feb 1999 |
| 668 | Seaboard Oil Company | Midland, TX 79710 | Oil & Gas Operator | Mar 2008 |
| 669 | Seaboard Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 670 | Seaboard Pipe & Equip. Co. | | Oil & Gas Operator | May 1977 |
| 671 | Seaboard Well Service, Inc. | | Oil & Gas Operator | Jan 1978 |
| 672 | Seabreeze Production Co | Hungerford, TX 77448 | Oil & Gas Operator | Jun 2026 |
| 673 | Seaco Production | Dripping SPGS, TX 78620 | Oil & Gas Operator | Feb 2016 |
| 674 | Seago Operating Co., L.L.C. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2011 |
| 675 | Seago Petroleum, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Jun 2026 |
| 676 | Seagrove Resources LLC | Malakoff, TX 75148 | Oil & Gas Operator | Feb 2026 |
| 677 | Seagull Development Corp | Massillon, OH 44646-7436 | Oil & Gas Operator | Dec 2015 |
| 678 | Seagull Energy Corporation | | Gas Operator | Mar 1987 |
| 679 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 680 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 681 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 682 | Seagull Operatin | | Oil & Gas Operator | Jul 1995 |
| 683 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 684 | Seahawk Oil & Gas Company | Dallas, TX 75379 | Oil & Gas Operator | Aug 2007 |
| 685 | Seahawk Oil International Inc | Newport Beach, CA 92660 | Oil & Gas Operator | Oct 1997 |
| 686 | Seal Energy Company | | Oil Operator | Dec 2024 |
| 687 | Seal Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Dec 2006 |
| 688 | Seale, Don R. | Electra, TX 76360 | Oil & Gas Operator | Jun 2026 |
| 689 | Sealexco | | Oil & Gas Operator | Jun 1992 |
| 690 | Sealexco-Crescent Drilling | | Oil & Gas Operator | May 1986 |
| 691 | Seals And Brown Oil Operating | Norman, OK 73072-3020 | Oil & Gas Operator | Sep 2024 |
| 692 | Seals Oil Company | Fox, OK 73435-0222 | Oil & Gas Operator | Nov 2011 |
| 693 | Sean M Sharp LLC | Chalk Hill, PA 15421 | Oil & Gas Operator | Oct 2025 |
| 694 | Seanard Energy Company | Baton Rouge, LA 70808 | Oil & Gas Operator | Jul 2002 |
| 695 | Seaport Inc | Oklahoma City, OK 73131 | Oil & Gas Operator | Feb 2026 |
| 696 | Seaport Natural Gas Co., Inc. | Angola, NY 14006 | Gas Operator | Dec 2024 |
| 697 | Search Drilling Company | Houston, TX 77010 | Oil & Gas Operator | Feb 2001 |
| 698 | Searchers Exploration | Brenham, TX 77833 | Oil Operator | Jun 2026 |
| 699 | Searcy Brothers Inc | Tulsa, OK 74135-0433 | Oil Operator | Jun 2004 |
| 700 | Sears Joe M | Bethany, OK 730084841 | Oil & Gas Operator | May 2013 |