| 701 | Shearer Oil Company | Graham, TX 76450 | Oil & Gas Operator | May 2002 |
| 702 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 703 | Shelley, Richard W | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2015 |
| 704 | Sherley, O. C. | Megargel, TX 76370 | Oil & Gas Operator | Aug 2003 |
| 705 | SHL Operating | Lubbock, TX 79416 | Oil & Gas Operator | Dec 2025 |
| 706 | Shoshone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | May 1994 |
| 707 | Sierra Exploration Company | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2008 |
| 708 | Simmons, Stanley J. | Olney, TX 76374 | Oil & Gas Operator | Aug 1994 |
| 709 | Sissom Oil | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 710 | Sissom Oil Field Services, LLC | Graham, TX 76450 | Oil Operator | Dec 2025 |
| 711 | Skinner, W. E. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 712 | SKS Oil | Olney, TX 76374 | Oil & Gas Operator | Dec 2025 |
| 713 | Sky Development Corporation | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 714 | Skybridge Energy LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2025 |
| 715 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Dec 2025 |
| 716 | Slate Holdings, Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Dec 2025 |
| 717 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 718 | Smith, David | Wichita Falls, TX 76310 | Oil Operator | Dec 2025 |
| 719 | Smith, Ted H. | Wichita Falls, TX 76310 | Oil & Gas Operator | Sep 1998 |
| 720 | Smulcer, Jimmy A. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2002 |
| 721 | Socorro Exploration, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Dec 2025 |
| 722 | Southern Exploration, Inc. | Fort Worth, TX 76137 | Oil & Gas Operator | Aug 2023 |
| 723 | Southwest Royalties, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 724 | Spearco Oil | Electra, TX 76360 | Oil & Gas Operator | Aug 2003 |
| 725 | Special JHR Corp | Bridgeville, PA 15017 | Oil & Gas Operator | Dec 2025 |
| 726 | SPH Development, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Nov 2022 |
| 727 | Spitfire Partners, LLC | Dallas, TX 75225 | Oil Operator | Dec 2025 |
| 728 | Spragins, Ed | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 729 | Springfield Oil Services, Inc. | Mamaroneck, NY 10543 | Oil & Gas Operator | Dec 2025 |
| 730 | Spruiell Drilling Co., Inc. | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 731 | Squyres Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2024 |
| 732 | Stagg Investment Group, Inc. | Midland, TX 79701 | Oil Operator | May 2013 |
| 733 | Stamper Operating Co., Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2025 |
| 734 | Star Production, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Dec 2025 |
| 735 | Startex Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 736 | Staub, Larry, Inc. | Azle, TX 76020 | Oil & Gas Operator | Dec 2025 |
| 737 | Steinberger, D. | Windthorst, TX 76389 | Oil & Gas Operator | Oct 1995 |
| 738 | Steinberger, Gerald | Windthorst, TX 76389 | Oil & Gas Operator | Sep 2007 |
| 739 | Stelucan Energy, LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2025 |
| 740 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 741 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 742 | Stevens & Tull, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 743 | Stone & Williams Oil&Gas Co.,Inc | Holliday, TX 76366 | Oil Operator | Apr 2013 |
| 744 | Stone, B. W. | Holliday, TX 76366 | Oil & Gas Operator | Feb 2012 |
| 745 | Stone, Gregory W. | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 746 | Stonebriar Oil LLC | Frisco, TX 75034 | Oil & Gas Operator | Dec 2025 |
| 747 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Dec 2025 |
| 748 | Stovall Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 749 | Strange, D. D. | Archer City, TX 76351 | Oil & Gas Operator | Sep 2014 |
| 750 | Strange, Joyce Marital Trust | Holliday, TX 76366 | Oil Operator | May 2008 |
| 751 | Strawn DRLG. Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2005 |
| 752 | Stroube Energy Corporation | Dallas, TX 75248 | Oil & Gas Operator | Jan 2012 |
| 753 | Stubbs Operating Co. | Archer City, TX 76351 | Oil & Gas Operator | Aug 1998 |
| 754 | Stults, Joe K. | Archer City, TX 76351 | Oil & Gas Operator | Mar 2007 |
| 755 | Stuteville Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Aug 2004 |
| 756 | Stuteville, Jack | Olney, TX 76374 | Oil Operator | Dec 2025 |
| 757 | Summit Resources, Inc. | Houston, TX 77077 | Oil & Gas Operator | Sep 2016 |
| 758 | Sunday Corporation | Olney, TX 76374 | Oil & Gas Operator | Dec 2025 |
| 759 | Sundial Resources, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 760 | Swanson & Vestal | Electra, TX 76360 | Oil & Gas Operator | Oct 1997 |
| 761 | Swanson, Tommy Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Mar 2017 |
| 762 | SWJN Oil Company | Kilgore, TX 75663 | Oil Operator | Dec 2025 |
| 763 | Symank, Steve | Olney, TX 76374 | Oil & Gas Operator | Dec 2025 |
| 764 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2025 |
| 765 | T.F. Well Service, L.L.C. | Iowa Park, TX 76367 | Oil Operator | Dec 2025 |
| 766 | Talley, W.T. | Olney, TX 76374 | Oil & Gas Operator | May 2005 |
| 767 | Talon Production, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 768 | Tam2 Squared Operating, LLC | Rockwall, TX 75032 | Oil & Gas Operator | Dec 2025 |
| 769 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 770 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 771 | Taubert & Steed | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2001 |
| 772 | Taylor Properties | Wichita Falls, TX 76301 | Gas Operator | Dec 2025 |
| 773 | TB Petroleum, LLC | Petrolia, TX 76377 | Oil & Gas Operator | Dec 2025 |
| 774 | TCT Operating Company, Inc. | Johnson City, TX 78636 | Oil & Gas Operator | Feb 2017 |
| 775 | Teague, J. V. & Robinson, E. W. | Olney, TX 76374 | Oil & Gas Operator | May 1996 |
| 776 | Tega Operating Co. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2012 |
| 777 | Tember Oil Company | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 778 | Tempo Resources GP, LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Apr 2013 |
| 779 | Terry, Lewis D. | Olney, TX 76374 | Oil & Gas Operator | Sep 1995 |
| 780 | Tex-R Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2021 |
| 781 | Texas Energy Operations, LC | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 782 | Texas Oil Company, The | Houston, TX 77018 | Oil & Gas Operator | Aug 2006 |
| 783 | Texas Shallow Oil & Gas, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 784 | Texoma Oil Tools, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 785 | Thompson, Mark P. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 786 | Thor-Max Operating, Inc. | Plano, TX 75025 | Oil & Gas Operator | Dec 2025 |
| 787 | Thornton, Michael D. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 1995 |
| 788 | Three B Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 789 | Three Forks Resources, LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Dec 2025 |
| 790 | Three P Operating Co.,GP, L.L.C. | Newcastle, TX 76372 | Oil & Gas Operator | Dec 2025 |
| 791 | Three P Operating Company | Newcastle, TX 76372 | Oil & Gas Operator | Nov 2007 |
| 792 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 793 | Threshold Exploration, Inc. | College Sta, TX 77842 | Oil & Gas Operator | Oct 2015 |
| 794 | Thunder Resources LLC | Graham, TX 76450 | Oil Operator | Dec 2025 |
| 795 | Tillman, Jack Equipment Co. | Holliday, TX 76366 | Oil & Gas Operator | Sep 2004 |
| 796 | TPR - Texas Petroleum Res. Inc | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 797 | TR Operating LLC | Graham, TX 76450 | Oil Operator | Oct 2025 |
| 798 | Trans-Pecos Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Dec 2025 |
| 799 | Tres Piedras, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 1999 |
| 800 | Tri "M" Oil & Gas | Muenster, TX 76252 | Oil & Gas Operator | Dec 2025 |