| 601 | Smith, R. E. Interests, Inc. | Houston, TX 77027 | Oil & Gas Operator | Mar 1998 |
| 602 | Smith, Ted H. | Wichita Falls, TX 76310 | Oil & Gas Operator | Sep 1998 |
| 603 | Smith, W. Don | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2001 |
| 604 | SMR Natural Gas Ventures Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 1999 |
| 605 | Smulcer, Jimmy A. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2002 |
| 606 | Smyth Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2003 |
| 607 | Smyth Oil LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 608 | SN Ef Maverick, LLC | Houston, TX 77002 | Oil & Gas Operator | Aug 2023 |
| 609 | SN Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 610 | Snappy Services, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 611 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 612 | Snow Oil & Gas Inc. | Andrews, TX 79714 | Oil & Gas Operator | Apr 2024 |
| 613 | Snow Oil Company | Nocona, TX 76255 | Oil Operator | Apr 2024 |
| 614 | Snow Operating Co., Inc. | Haltom City, TX 76117 | Oil & Gas Operator | Feb 2024 |
| 615 | SNR Operating, LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2024 |
| 616 | Snuggs Oil Company | Gainesville, TX 76240 | Oil & Gas Operator | Jan 2024 |
| 617 | SNW Operating Company | Borger, TX 79008 | Oil & Gas Operator | Jul 2016 |
| 618 | Snyder Drilling Corp. | Albany, TX 76430 | Oil & Gas Operator | Apr 2024 |
| 619 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 620 | Snyder Partners | Cody, WY 82414 | Oil & Gas Operator | Jan 2024 |
| 621 | So Operating Company | Cisco, TX 76437 | Oil & Gas Operator | Apr 2024 |
| 622 | Socorro Exploration, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Apr 2024 |
| 623 | Sogc, Inc. | Salt Lake Cty, UT 84131 | Oil & Gas Operator | Apr 2024 |
| 624 | Sogo III LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2017 |
| 625 | Soil Energy, Inc. | Imperial, TX 79743 | Oil & Gas Operator | Apr 2024 |
| 626 | Sojitz Energy Venture, Inc. | Houston, TX 77042 | Oil & Gas Operator | Feb 2018 |
| 627 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 628 | Sol Oil Co., L.C. | Crane, TX 79731 | Oil Operator | Apr 2024 |
| 629 | Sola Operating, LLC | Trout, LA 71371 | Oil Operator | Apr 2024 |
| 630 | Solano Gas Processing, Inc. | Austin, TX 78759 | Oil & Gas Operator | Aug 1998 |
| 631 | Solar Exploration TX LLC | Tulsa, OK 74133 | Oil Operator | Dec 2018 |
| 632 | Solatex Resources, LTD | Houston, TX 77257 | Oil & Gas Operator | Apr 2024 |
| 633 | Solis Partners, L.L.C. | Midland, TX 79707 | Oil & Gas Operator | Jan 2024 |
| 634 | Sollohub Petro LLC | Von Ormy, TX 78073 | Oil Operator | Apr 2024 |
| 635 | Solo Operating Services, LLC | Falfurrias, TX 78355 | Gas Operator | Apr 2024 |
| 636 | Somerset Oil & Gas Company | Portland, TX 78374 | Oil & Gas Operator | Dec 2006 |
| 637 | Somex Energy Company | San Antonio, TX 78230 | Oil & Gas Operator | Mar 2002 |
| 638 | Sommer Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2023 |
| 639 | Somont Oil Co., Inc. | Spring, TX 77379 | Oil & Gas Operator | Apr 2024 |
| 640 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 641 | Sonat Exploration Co. - Houston | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 642 | Sonat Exploration Co. - Midland | Houston, TX 77251 | Oil & Gas Operator | Mar 1999 |
| 643 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 644 | Sonat Exploration Company-MCR | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 645 | Sonat Exploration Gom Inc. | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 646 | Sonerra Resources Corporation | Nacogdoches, TX 75963 | Oil & Gas Operator | Apr 2024 |
| 647 | Sonoble Operating, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jun 2003 |
| 648 | Sonora Petroleum Corp. | Austin, TX 78734 | Oil & Gas Operator | Apr 2024 |
| 649 | Sonoran Energy Inc. | Addison, TX 75001 | Oil & Gas Operator | Apr 2024 |
| 650 | Sonterra Oil & Gas, Inc. | Wichita, KS 67217 | Oil & Gas Operator | Apr 2024 |
| 651 | Sorto, Peters God | Somerset, TX 78069 | Oil Operator | Apr 2024 |
| 652 | Soto Inc. | Ozona, TX 76943 | Oil & Gas Operator | Aug 2020 |
| 653 | Sotol Energy, Inc. | Magnolia, TX 77354 | Oil & Gas Operator | Apr 2024 |
| 654 | Sounion Petroleum Incorporated | Baltimore, MD 21218 | Oil & Gas Operator | Aug 1994 |
| 655 | Source Petroleum Inc. | San Antonio, TX 78265 | Oil & Gas Operator | Apr 2024 |
| 656 | South Bay Resources, L.L.C. | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2024 |
| 657 | South Central Texas Oil & Gas Co | Houston, TX 77060 | Oil & Gas Operator | Apr 2024 |
| 658 | South Florida Investment Company | Pampa, TX 79066 | Oil & Gas Operator | Jun 1997 |
| 659 | South Houston Production Company | Muenster, TX 76252 | Oil & Gas Operator | Apr 2024 |
| 660 | South Leeville, LLC | Houston, TX 77069 | Oil & Gas Operator | Oct 2022 |
| 661 | South Loop Operating, L.C. | San Antonio, TX 78279 | Oil & Gas Operator | Apr 2009 |
| 662 | South Oil, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2018 |
| 663 | South Sam Operating Company, LLC | Lakehills, TX 78063 | Oil Operator | Apr 2024 |
| 664 | South Texas Drilling & Expl, Inc | San Antonio, TX 78217 | Oil & Gas Operator | Jan 1999 |
| 665 | South Texas Injection Company | Mineral, TX 78125 | Oil & Gas Operator | Dec 2016 |
| 666 | South Texas Limited Partnership | Houston, TX 77060 | Oil & Gas Operator | Feb 1994 |
| 667 | South Texas Operating Company | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 668 | South Texas SWD, Inc. | Beeville, TX 78104 | Oil & Gas Operator | Aug 2003 |
| 669 | South West Texas Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Feb 2000 |
| 670 | Southcoast Production Inc | Dayton, TX 77535 | Oil & Gas Operator | Apr 2024 |
| 671 | Southcoast Resources, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2015 |
| 672 | Southcross Operating LLC | Amarillo, TX 79114 | Oil & Gas Operator | Oct 2005 |
| 673 | Southeastern Pipe Line Company | Tyler, TX 75711 | Oil & Gas Operator | Dec 2020 |
| 674 | Southeastern Resources Corp. | Mansfield, TX 76063 | Oil & Gas Operator | Feb 2004 |
| 675 | Southerland, Glenn Oil & Gas Co. | Hallsville, TX 75650 | Oil & Gas Operator | Feb 2021 |
| 676 | Southern Alliance Oil Corp. | Grapevine, TX 76099 | Oil & Gas Operator | Apr 2024 |
| 677 | Southern Bay Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 678 | Southern Crude, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2017 |
| 679 | Southern Exploration, Inc. | Fort Worth, TX 76137 | Oil & Gas Operator | Aug 2023 |
| 680 | Southern G Holdings, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2007 |
| 681 | Southern Mineral Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2001 |
| 682 | Southern Oil & Gas LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2024 |
| 683 | Southern Oil Of Louisiana LLC | Madisonville, LA 70447 | Oil & Gas Operator | Apr 2024 |
| 684 | Southern Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 685 | Southern Resource Company | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Mar 2022 |
| 686 | Southern Royalty Inc. | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Feb 1997 |
| 687 | Southern Tejas Asset Group LLC | McAllen, TX 78501 | Oil & Gas Operator | Apr 2024 |
| 688 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 689 | Southlake Exploration, Inc. | Southlake, TX 76092 | Oil & Gas Operator | Apr 2024 |
| 690 | Southlake Operating LLC | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2024 |
| 691 | Southland Energy Corporation | Houston, TX 77060 | Oil & Gas Operator | Aug 2022 |
| 692 | Southland Royalty Co.-Midland | Midland, TX 79702 | Oil & Gas Operator | Mar 1996 |
| 693 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 694 | Southridge Operating Company | San Marcos, TX 78667 | Oil & Gas Operator | Apr 2024 |
| 695 | Southstar Energy Corporation | Ardmore, OK 73401 | Gas Operator | Aug 1990 |
| 696 | Southstone Energy, LLC | Austin, TX 78735 | Oil Operator | Apr 2024 |
| 697 | Southwest Energy Devel.,Inc. | Sugar Land, TX 77478 | Oil & Gas Operator | Jul 2007 |
| 698 | Southwest Energy LP | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 699 | Southwest Gas Systems, Inc. | Spring, TX 77379 | Oil & Gas Operator | Apr 2024 |
| 700 | Southwest Gathering Company | Alice, TX 78332 | Oil & Gas Operator | Apr 2024 |