| 701 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 702 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2026 |
| 703 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jun 2026 |
| 704 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 705 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 706 | State Oil Company | | Oil & Gas Operator | Mar 2006 |
| 707 | Stauros Operating Company | Edmond, OK 73083-2707 | Oil & Gas Operator | Mar 2001 |
| 708 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Jun 2026 |
| 709 | Stone Oak Operating LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jun 2026 |
| 710 | Stover Oil Company | Konawa, OK 74849-0216 | Oil & Gas Operator | Jul 2002 |
| 711 | Strange, D. D. | Archer City, TX 76351 | Oil & Gas Operator | Sep 2014 |
| 712 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | May 2026 |
| 713 | Streamline Oil And Gas Inc | Lindsay, OK 73052 | Oil & Gas Operator | Jun 2026 |
| 714 | Stride Energy LLC | Piedmont, OK 73078 | Oil & Gas Operator | Jun 2026 |
| 715 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 716 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | May 2026 |
| 717 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Sep 2026 |
| 718 | Superior Midstream, LLC | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2020 |
| 719 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | May 2026 |
| 720 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 721 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 722 | T & D Oil | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2026 |
| 723 | T-D Oil Inc | Cement, OK 73017-0065 | Oil & Gas Operator | May 2020 |
| 724 | Tack Operating LLC | Oklahoma City, OK 73172-1492 | Oil & Gas Operator | Aug 2021 |
| 725 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 726 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jun 2026 |
| 727 | Tarrant Tracy Dba Trace Oil | Crescent, OK 73028 | Oil & Gas Operator | Feb 2021 |
| 728 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 729 | TD Oil & Gas LLC | Duncan, OK 73533-1851 | Oil Operator | Apr 2023 |
| 730 | TD Operating Inc | Hinton, OK 73047 | Oil & Gas Operator | Jun 2026 |
| 731 | Te-Ray Energy Inc | Oklahoma City, OK 73108 | Oil & Gas Operator | May 2026 |
| 732 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2026 |
| 733 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | May 2026 |
| 734 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2025 |
| 735 | Teocalli Exploration LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jun 2026 |
| 736 | Terraquest Corporation | Edmond, OK 73034 | Oil & Gas Operator | Jul 1997 |
| 737 | Territory Resources LLC | Stillwater, OK 74074-1869 | Oil & Gas Operator | Jul 2026 |
| 738 | Tex-Ok Energy, Limited Partnership | Cody, WY 82414 | Oil & Gas Operator | Jun 2026 |
| 739 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 740 | Texaco Exploration & Prod Inc | Houston, TX 77236 | Oil & Gas Operator | Apr 2026 |
| 741 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 742 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 743 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Jun 2026 |
| 744 | Thomas Blankenship Dba B S Oil Company | Lindsay, OK 73052 | Oil & Gas Operator | Jun 2026 |
| 745 | Thomas J L Engineering Inc | Edmond, OK 73003-0026 | Oil & Gas Operator | Jul 2016 |
| 746 | Three Sands Oil Inc | Perry, OK 73077 | Oil & Gas Operator | May 2023 |
| 747 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 748 | Tilley Oil Inc | Velma, OK 73491 | Oil & Gas Operator | Jun 2026 |
| 749 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Jun 2026 |
| 750 | TLS Oil & Gas Inc | Kingfisher, OK 73750-0901 | Oil & Gas Operator | May 2026 |
| 751 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2026 |
| 752 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 753 | Trace Oil & Gas LP | Cement, OK 73017 | Oil & Gas Operator | May 2026 |
| 754 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Jun 2026 |
| 755 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 756 | Travis Peak Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2026 |
| 757 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Sep 2026 |
| 758 | Trepco Production Company Inc | Yukon, OK 73099 | Oil & Gas Operator | May 2026 |
| 759 | Triad Energy Corp Of Texas | Houston, TX 77057-2696 | Oil & Gas Operator | Sep 2014 |
| 760 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Jun 2026 |
| 761 | Triexco Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2012 |
| 762 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 763 | Trilogy Natural Resources LLC | Edmond, OK 73025 | Oil & Gas Operator | May 2026 |
| 764 | Trineha Inc | Ardmore, OK 73402-2478 | Oil & Gas Operator | Jun 2009 |
| 765 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Sep 2026 |
| 766 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 767 | Triumph Energy Inc | Lafayette, LA 70505 | Oil & Gas Operator | Nov 2015 |
| 768 | Triumph Energy Partners LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | May 2026 |
| 769 | Troy Energy Operating LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2026 |
| 770 | TRP Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Sep 2026 |
| 771 | Tulsa Energy Partners LLC | Tulsa, OK 74105 | Oil & Gas Operator | Jun 2026 |
| 772 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | May 2026 |
| 773 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Jun 2026 |
| 774 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2026 |
| 775 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Jun 2026 |
| 776 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 777 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 778 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 779 | Unbridled Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 780 | Unicon Producing Company | Houston, TX 75252 | Gas Operator | Mar 1994 |
| 781 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 782 | Union Texas Petroleum Corp | Houston, TX 77252-2120 | Oil & Gas Operator | Dec 2014 |
| 783 | Unit Drilling & Exploration Co | Tulsa, OK 74132-5300 | Oil & Gas Operator | May 2026 |
| 784 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Sep 2026 |
| 785 | United Energy Operating, LLC | Edmond, OK 73083 | Oil & Gas Operator | Sep 2026 |
| 786 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | May 2026 |
| 787 | United Production Company LLC | Edmond, OK 73003 | Oil & Gas Operator | Jun 2026 |
| 788 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Sep 2026 |
| 789 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Sep 2026 |
| 790 | Validus Energy II Midcon LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2026 |
| 791 | Vantage Point Operating Co. | Houston, TX 77057 | Oil & Gas Operator | Dec 2014 |
| 792 | Vaquero Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2026 |
| 793 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Apr 2026 |
| 794 | Veenker Resources Inc | Oklahoma City, OK 73113 | Oil & Gas Operator | Jun 2026 |
| 795 | Vi-Roi Oil Company | Duncan, OK 73533 | Oil & Gas Operator | Jun 2004 |
| 796 | Vi-Roi Oil Company LLC | Duncan, OK 73534-1624 | Oil Operator | Aug 1997 |
| 797 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 798 | Vitol Inc. | Houston, TX 77027 | Oil & Gas Operator | Sep 2023 |
| 799 | Vitruvian Exploration LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2016 |
| 800 | Vitruvian II Woodford LLC | The Woodlands, TX 77381-5259 | Oil & Gas Operator | May 2019 |