| 701 | Sinclair Development, LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 702 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | May 2025 |
| 703 | Sledge, H. G., Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2016 |
| 704 | SMC Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 705 | Smith Brothers Oil & Gas, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 706 | Smith Energy Operating Company | Lubbock, TX 79423 | Oil & Gas Operator | May 2025 |
| 707 | Smith Oil Company | Smackover, AR 71762 | Oil Operator | Dec 2024 |
| 708 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 709 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | May 2025 |
| 710 | Sogo III LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2017 |
| 711 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 712 | Sonat Exploration Co. - Midland | Houston, TX 77251 | Oil & Gas Operator | Mar 1999 |
| 713 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 714 | Soto Inc. | Ozona, TX 76943 | Oil & Gas Operator | Aug 2020 |
| 715 | Southland Energy Corporation | Houston, TX 77060 | Oil & Gas Operator | Aug 2022 |
| 716 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 717 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 718 | Speartip Energy, LLC | Katy, TX 77450 | Oil Operator | May 2025 |
| 719 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jan 2022 |
| 720 | Stallion Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 721 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 722 | Stanolind Production LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 723 | Star Of Texas Energy SRVS, Inc. | Austin, TX 78702 | Oil & Gas Operator | May 2025 |
| 724 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 725 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 726 | Sterlynn Oil & Gas, Inc. | Harper, TX 78631 | Oil Operator | May 2025 |
| 727 | Stone Creek Operating, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | May 2025 |
| 728 | Stonegate Production Company,LLC | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 729 | Stout Energy Inc. | Midland, TX 79708 | Oil & Gas Operator | May 2025 |
| 730 | Stowe Energy, Inc. | Vernon, TX 76384 | Oil & Gas Operator | Mar 2003 |
| 731 | Strata Operating, Inc. | Corpus Chrsti, TX 78466 | Oil & Gas Operator | May 2025 |
| 732 | Stuart Operating, LLC | Ozona, TX 76943 | Oil & Gas Operator | May 2025 |
| 733 | Summit Exploration, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2008 |
| 734 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | May 2025 |
| 735 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jan 2025 |
| 736 | Sunset Leases LLC | Ozona, TX 76943 | Oil Operator | May 2025 |
| 737 | Surge Solutions, Inc. | Iraan, TX 79744 | Oil Operator | May 2025 |
| 738 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 739 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2025 |
| 740 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | May 2025 |
| 741 | T. L. J. Incorporated | Big Lake, TX 76932 | Oil & Gas Operator | Dec 1998 |
| 742 | T.G.B., Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 743 | T.O.I. | Midland, TX 79710 | Oil & Gas Operator | Mar 2001 |
| 744 | Tacor Resources Inc | Midland, TX 79705 | Oil & Gas Operator | May 2025 |
| 745 | Tall City Operations LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2016 |
| 746 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 747 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 748 | Taurus Exploration U.S.A., Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 1998 |
| 749 | Taurus Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 750 | Taurus Petroleum, Inc. (A) | San Antonio, TX 78259 | Oil & Gas Operator | Jul 1996 |
| 751 | Taylor, J. S. Inc. | Lewisville, TX 75057 | Oil & Gas Operator | May 2025 |
| 752 | TC3 Energy Company | Dallas, TX 75248 | Oil & Gas Operator | May 2025 |
| 753 | Tejas Jack Sales, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | May 2025 |
| 754 | Tejones Operating Corporation | San Antonio, TX 78217 | Oil & Gas Operator | May 2025 |
| 755 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | May 2025 |
| 756 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | May 2025 |
| 757 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | May 2025 |
| 758 | Texana Operating Company | Houston, TX 77090 | Oil & Gas Operator | May 2025 |
| 759 | Texas Crude Operator, Inc. | Houston, TX 77098 | Oil & Gas Operator | Aug 2017 |
| 760 | Texas Vanguard Oil Company | Austin, TX 78720 | Oil & Gas Operator | Jan 2014 |
| 761 | Texas-Ohio Producing Company | Spring, TX 77383 | Oil & Gas Operator | Jul 1995 |
| 762 | Texcal Resources, Inc. | Plano, TX 75094 | Oil & Gas Operator | Apr 1994 |
| 763 | Texland Petroleum Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2003 |
| 764 | Texland Petroleum, L.P. | Fort Worth, TX 76107 | Oil & Gas Operator | May 2025 |
| 765 | Texland-Rector & Schumacher | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2000 |
| 766 | Texon Oil Company, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 767 | Thomas Oil And Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | May 2019 |
| 768 | Thompson, J. Cleo | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
| 769 | THP Operating LLC | Santa Anna, TX 76878 | Oil & Gas Operator | May 2025 |
| 770 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 771 | Three-B Oil Company, The | Monahans, TX 79756 | Oil & Gas Operator | May 2025 |
| 772 | Tidlow | Santa Fe, NM 87508 | Oil & Gas Operator | Dec 2007 |
| 773 | Tidwell Production Company | Sonora, TX 76950 | Oil & Gas Operator | May 2025 |
| 774 | Tipperary Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | May 2014 |
| 775 | TMBR/Sharp Drilling, Inc. | Midland, TX 79703 | Oil & Gas Operator | Feb 2004 |
| 776 | Toc Energy Resources, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | May 2025 |
| 777 | Topat Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Sep 2017 |
| 778 | Townsend Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2021 |
| 779 | Tpet, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |
| 780 | Tracy Production | Lindale, TX 75771 | Oil & Gas Operator | May 2025 |
| 781 | Travers Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | May 2025 |
| 782 | Trek Petroleum Company, Inc. | Midland, TX 79707 | Oil & Gas Operator | May 2025 |
| 783 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | May 2025 |
| 784 | Trenna Oil Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2013 |
| 785 | Triple "N" Services, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 786 | Triple Crown Resources, LLC | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 787 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | May 2025 |
| 788 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 789 | Tripp & Sons, LLC | Odessa, TX 79768 | Oil & Gas Operator | May 2025 |
| 790 | Tristar Exploration, Inc | Pflugerville, TX 78660 | Oil & Gas Operator | May 2025 |
| 791 | Trojan Oil Company, LLC | Big Lake, TX 76932 | Oil Operator | May 2025 |
| 792 | Tucker Drilling Company, Inc. | San Angelo, TX 76903 | Oil & Gas Operator | Jul 1996 |
| 793 | Tularosa Operating Company | Kerrville, TX 78029 | Oil & Gas Operator | Mar 2024 |
| 794 | Tumbleweed Energy Limited | Midland, TX 79704 | Oil & Gas Operator | Dec 2022 |
| 795 | TXP, Incorporated | San Angelo, TX 76906 | Oil & Gas Operator | May 2025 |
| 796 | U.S. Enercorp, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2004 |
| 797 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 798 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 799 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 800 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | May 2025 |