| 701 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 702 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 703 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 704 | T Investments Inc | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Mar 2011 |
| 705 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 706 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 707 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 708 | Taurus Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 709 | Taylor John A | | Oil & Gas Operator | Jan 2016 |
| 710 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 711 | Te-Ray Energy, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2025 |
| 712 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2025 |
| 713 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Jan 2025 |
| 714 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2024 |
| 715 | Territory Resources LLC | Stillwater, OK 74074-1869 | Oil & Gas Operator | Mar 2025 |
| 716 | Tessera Energy LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2025 |
| 717 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Feb 2025 |
| 718 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 719 | Texas Crude Exploration, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Aug 1992 |
| 720 | Texas Energy & Environmental | Houston, TX 77070 | Oil & Gas Operator | Nov 1998 |
| 721 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Feb 2025 |
| 722 | Thomas J L Engineering Inc | Edmond, OK 73003-0026 | Oil & Gas Operator | Jul 2016 |
| 723 | Thomas Production Co Inc | | Oil & Gas Operator | Mar 2015 |
| 724 | Thomas, R. W. Inc. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 725 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Jan 2025 |
| 726 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 727 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 728 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Feb 2025 |
| 729 | TNT Operating Company Inc | Blanchard, OK 73010 | Oil & Gas Operator | Sep 2024 |
| 730 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2025 |
| 731 | Toland & Johnston Inc | Edmond, OK 73034 | Oil & Gas Operator | Feb 2025 |
| 732 | Topco Inc | Tulsa, OK 74105 | Oil & Gas Operator | Nov 2005 |
| 733 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 734 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 735 | Total Petroleum Inc | Denver, CO 80201-0500 | Oil & Gas Operator | Nov 2006 |
| 736 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 737 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Feb 2025 |
| 738 | Trans Atlantic Resource Corp | Tulsa, OK 74136-5709 | Oil & Gas Operator | Nov 1998 |
| 739 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Jan 2025 |
| 740 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Jan 2025 |
| 741 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 742 | Trinity Resources, Inc. | Houston, TX 77277 | Oil & Gas Operator | May 2020 |
| 743 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2025 |
| 744 | TRP Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 745 | True Performance Administrators LLC | Tulsa, OK 74137 | Oil & Gas Operator | Jan 2025 |
| 746 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Feb 2025 |
| 747 | Tulsa Minerals Inc | Tulsa, OK 74136-1045 | Oil & Gas Operator | May 2013 |
| 748 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2025 |
| 749 | Tuthill S Keith & Bill Barbee | Amarillo, TX 79101-1427 | Oil & Gas Operator | Dec 2004 |
| 750 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2025 |
| 751 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2025 |
| 752 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Feb 2025 |
| 753 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 754 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 755 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 756 | Unbridled Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 757 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 758 | Union Texas Petroleum Corp. | Houston, TX 77252-2120 | Oil & Gas Operator | Dec 2014 |
| 759 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2025 |
| 760 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Jan 2025 |
| 761 | United Production Company LLC | Edmond, OK 73003 | Oil & Gas Operator | Feb 2025 |
| 762 | United States Gypsum Company | Oakfield, NY 14125 | Oil & Gas Operator | Dec 2023 |
| 763 | United States Trading & Trans | Dallas, TX 75380-3342 | Oil & Gas Operator | Dec 1994 |
| 764 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Apr 2025 |
| 765 | Validus Energy II Midcon LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 766 | Vantage Point Operating Co | Houston, TX 77057 | Oil & Gas Operator | Dec 2014 |
| 767 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Dec 2024 |
| 768 | Vaughan III Ben F | Austin, TX 78768-2233 | Oil & Gas Operator | Dec 2024 |
| 769 | Vaughan Production Company, Inc. | Norman, OK 73072 | Oil & Gas Operator | Sep 2014 |
| 770 | Vector Energy Corporation | Houston, TX 77060 | Oil & Gas Operator | Apr 2025 |
| 771 | Veenker Resources, Inc. | Oklahoma City, OK 73113 | Oil & Gas Operator | Feb 2025 |
| 772 | Vess Oil Corporation | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 773 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Jan 2025 |
| 774 | Vintage Resources Inc | Lindsay, OK 73052-0285 | Oil Operator | Dec 2007 |
| 775 | Vistatex Energy LLC | Houston, TX 77057 | Oil & Gas Operator | Jan 2025 |
| 776 | Vitol Inc | Houston, TX 77002 | Oil & Gas Operator | Sep 2023 |
| 777 | VPR Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Oct 2013 |
| 778 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 779 | Walker Corporation (The) | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 780 | Walker Keith F | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2019 |
| 781 | Walker R J Oil Co Inc | | Oil & Gas Operator | May 2003 |
| 782 | Ward Oil Company An Okla Corp | McAlester, OK 74501 | Oil & Gas Operator | Feb 1993 |
| 783 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Jan 2025 |
| 784 | Warwick-Bacchus LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2025 |
| 785 | Warwick-Minerva LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2025 |
| 786 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Apr 2025 |
| 787 | Weimer & Fitzhugh | Tulsa, OK 74103-4102 | Oil & Gas Operator | Dec 1993 |
| 788 | Wellco Energy Inc | Harrah, OK 73045 | Oil & Gas Operator | Jan 2025 |
| 789 | Wellco Production LLC | Purcell, OK 73080-6833 | Oil & Gas Operator | Jan 2025 |
| 790 | Wenexco, Inc. | Streetman, TX 75859 | Oil & Gas Operator | Apr 2025 |
| 791 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Feb 2025 |
| 792 | Wheatland Oil Inc | Enid, OK 73702-1032 | Oil & Gas Operator | Mar 2015 |
| 793 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Jan 2025 |
| 794 | White Operating Company | Oklahoma City, OK 73159-7136 | Oil & Gas Operator | Feb 2025 |
| 795 | White Wilber R Oil Enterprises | | Oil & Gas Operator | May 2006 |
| 796 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 797 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Jan 2025 |
| 798 | Whitmar Natural Resources Co | Tulsa, OK 74136-9998 | Oil & Gas Operator | Jun 2004 |
| 799 | Whitmar Operating Company | Tulsa, OK 74103-3515 | Oil & Gas Operator | Apr 2009 |
| 800 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |