| 701 | Stroud Energy, LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2006 |
| 702 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Dec 2025 |
| 703 | Subterranean Energy, LLC | Tyler, TX 75705 | Oil & Gas Operator | Dec 2025 |
| 704 | Summit Energy,Inc | Littleton, CO 80127 | Oil & Gas Operator | Aug 2013 |
| 705 | Summit Resources MGMT., LLC. | Edmond, OK 73083 | Oil & Gas Operator | Dec 2025 |
| 706 | Sundance Resources, Inc. | Rio VIsta, TX 76093 | Oil & Gas Operator | Mar 2012 |
| 707 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Dec 2025 |
| 708 | Superior Royalty, LLC | Lindale, TX 75771 | Oil Operator | Dec 2025 |
| 709 | Supreme Energy Company, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Dec 2025 |
| 710 | SW Operating, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Sep 2000 |
| 711 | Sydri Operating, LLC | Dallas, TX 75231 | Oil & Gas Operator | Dec 2025 |
| 712 | T & G Oil, Inc. | White Oak, TX 75693 | Oil & Gas Operator | Dec 2010 |
| 713 | T & J Oil Production, L.L.C. | Lone Grove, OK 73443 | Oil & Gas Operator | Aug 2025 |
| 714 | T. J. Oil And Gas, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2002 |
| 715 | Tab Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 716 | Talbert, Eugene Operating Co,Inc | Tyler, TX 75702 | Oil & Gas Operator | Dec 1997 |
| 717 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 718 | Tanos Exploration II, LLC | Tyler, TX 75701 | Oil & Gas Operator | Sep 2023 |
| 719 | Tanos Exploration, LLC | Houston, TX 77010 | Oil & Gas Operator | Oct 2018 |
| 720 | Tascosa Petroleum Corporation | Amarillo, TX 79105 | Oil & Gas Operator | Dec 2025 |
| 721 | Tate, Larry V. Operating, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Apr 2002 |
| 722 | TC Oil And Gas, LLC | Denton, TX 76205 | Oil Operator | Dec 2025 |
| 723 | Tesoro E&P Company, L.P. | San Antonio, TX 78216 | Oil & Gas Operator | Jan 2000 |
| 724 | Texaco E & P Inc. | Houston, TX 77099 | Oil & Gas Operator | Dec 2025 |
| 725 | Texas Energy Operations, LC | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 726 | Texas Independent Explor., Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2002 |
| 727 | Texas M.O.R., Inc. | Corsicana, TX 75109 | Oil Operator | Sep 2013 |
| 728 | Texas Utilities Fuel Co. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2018 |
| 729 | Texas Utilities Mining Co. | Dallas, TX 75201 | Oil & Gas Operator | May 1995 |
| 730 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 731 | Texlan Oil Company, L.C. | Tyler, TX 75711 | Oil & Gas Operator | Aug 2003 |
| 732 | Texstar Petroleum, Inc. | Houston, TX 77002 | Oil & Gas Operator | Nov 2000 |
| 733 | TGNR East Texas II LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 734 | TGNR East Texas LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 735 | TGNR Gulf Coast LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 736 | Thor Operating Company | Tyler, TX 75710 | Oil & Gas Operator | Dec 1995 |
| 737 | Thrash, Afton | Kilgore, TX 75663 | Oil & Gas Operator | Apr 1996 |
| 738 | Three C Consulting, Inc. | Magnolia, TX 77355 | Oil & Gas Operator | Aug 1995 |
| 739 | Tidemark Exploration Inc | Tulsa, OK 74120 | Oil & Gas Operator | Apr 2019 |
| 740 | Titan Rock E&P, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2024 |
| 741 | Torch Energy Services, Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2011 |
| 742 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 743 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 744 | Tracer Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 1998 |
| 745 | Tracy Production | Lindale, TX 75771 | Oil & Gas Operator | Dec 2025 |
| 746 | Trailblazer Energy Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 747 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 748 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Dec 2025 |
| 749 | Tri-Am Operating Company | Frankston, TX 75763 | Oil & Gas Operator | Dec 2025 |
| 750 | Trio Production Company, LLC | Stephens, AR 71764 | Oil Operator | Jan 2025 |
| 751 | Triple J Investments Inc | Longview, TX 75606 | Oil & Gas Operator | Feb 2023 |
| 752 | Triple M Saltwater Disposal, LP | Kilgore, TX 75663 | Oil Operator | Dec 2025 |
| 753 | Triumph Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Jun 1994 |
| 754 | Trivium Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2025 |
| 755 | Txu Fuel Company | Dallas, TX 75201 | Oil & Gas Operator | May 2004 |
| 756 | Txu Gas Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2004 |
| 757 | TXX Operating LLC | Shreveport, LA 71133 | Oil & Gas Operator | Dec 2025 |
| 758 | Tyler Oil & Gas Inc. | Tyler, TX 75702 | Oil & Gas Operator | Sep 2004 |
| 759 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Jan 2001 |
| 760 | Unocal Exploration Corporation | Houston, TX 77001 | Oil & Gas Operator | May 1992 |
| 761 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Dec 2025 |
| 762 | Ursus Oil And Gas | Tyler, TX 75703 | Oil & Gas Operator | Dec 2025 |
| 763 | Usfg Oil & Gas, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Dec 2005 |
| 764 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Dec 2025 |
| 765 | Vaughan Operating Company, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2009 |
| 766 | Vaughan Production Company, Inc. | Norman, OK 73072 | Oil & Gas Operator | Sep 2014 |
| 767 | Ventex Operating Corp. | Addison, TX 75001 | Oil & Gas Operator | Dec 2025 |
| 768 | Venus Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2002 |
| 769 | Verado Energy, Inc. | Allen, TX 75013 | Oil & Gas Operator | Oct 2025 |
| 770 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Aug 2025 |
| 771 | Virtex Operating Company, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2023 |
| 772 | Virtex Petroleum Company, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Jan 2008 |
| 773 | Wagner & Brown, LTD. | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 774 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 775 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 776 | Warwick Oil & Gas, Inc. | Houston, TX 77098 | Oil & Gas Operator | Feb 1993 |
| 777 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 778 | West Mountain Operating Co, Inc. | Longview, TX 75604 | Oil & Gas Operator | Feb 2019 |
| 779 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Sep 2025 |
| 780 | Whitaker, Fred | Carthage, TX 75633 | Gas Operator | Mar 2001 |
| 781 | White Marlin Operating Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 782 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 783 | Wildhorse Resources, LLC | Houston, TX 77279 | Oil & Gas Operator | Feb 2015 |
| 784 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Dec 2025 |
| 785 | Williams, Clayton Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Dec 2025 |
| 786 | Willow Springs Prod. Serv.,LLC | Kilgore, TX 75663 | Oil & Gas Operator | Aug 1997 |
| 787 | Willow Springs Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 1999 |
| 788 | Wilson Resources, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2025 |
| 789 | Wimco | Dallas, TX 75229 | Oil & Gas Operator | Jul 2008 |
| 790 | Winchester Production Co., LTD. | Shreveport, LA 71129 | Oil & Gas Operator | Sep 2008 |
| 791 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 792 | Wing Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2000 |
| 793 | Winwell, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2007 |
| 794 | Wisenbaker Production Company | Tyler, TX 75702 | Oil & Gas Operator | Oct 2011 |
| 795 | Woodbine Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 796 | Worldwide Energy Corporation | Freer, TX 78357 | Oil & Gas Operator | Jan 1997 |
| 797 | WSF, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2013 |
| 798 | WTXR Operating (Texas), Inc. | Carrollton, TX 75007 | Oil Operator | Dec 2025 |
| 799 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 800 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |