| 701 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 702 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | May 2026 |
| 703 | TNT Operating Company Inc | Blanchard, OK 73010 | Oil & Gas Operator | Apr 2026 |
| 704 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | May 2026 |
| 705 | Toland & Johnston Inc | Edmond, OK 73034 | Oil & Gas Operator | Apr 2026 |
| 706 | Topco Inc | Tulsa, OK 74105 | Oil & Gas Operator | Nov 2005 |
| 707 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 708 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 709 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 710 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | May 2026 |
| 711 | Trans Atlantic Resource Corp | Tulsa, OK 74136-5709 | Oil & Gas Operator | Nov 1998 |
| 712 | Trepco Production Company Inc | Yukon, OK 73099 | Oil & Gas Operator | Apr 2026 |
| 713 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2026 |
| 714 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 715 | Trinity Resources, Inc. | Houston, TX 77277 | Oil & Gas Operator | May 2020 |
| 716 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Jul 2026 |
| 717 | TRP Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Jul 2026 |
| 718 | True Performance Administrators LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 719 | Tulsa Energy Partners LLC | Tulsa, OK 74105 | Oil & Gas Operator | May 2026 |
| 720 | Tulsa Minerals Inc | Tulsa, OK 74136-1045 | Oil & Gas Operator | May 2013 |
| 721 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Apr 2026 |
| 722 | Tuthill S Keith & Bill Barbee | Amarillo, TX 79101-1427 | Oil & Gas Operator | Dec 2004 |
| 723 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | May 2026 |
| 724 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2026 |
| 725 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | May 2026 |
| 726 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 727 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 728 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 729 | Unbridled Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2026 |
| 730 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 731 | Union Texas Petroleum Corp | Houston, TX 77252-2120 | Oil & Gas Operator | Dec 2014 |
| 732 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Jul 2026 |
| 733 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Apr 2026 |
| 734 | United Production Company LLC | Edmond, OK 73003 | Oil & Gas Operator | May 2026 |
| 735 | United States Gypsum Company | Oakfield, NY 14125 | Oil & Gas Operator | Dec 2025 |
| 736 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Jul 2026 |
| 737 | Validus Energy II Midcon LLC | Denver, CO 80202 | Oil & Gas Operator | Jul 2026 |
| 738 | Validus Inc | Fort Lauderdale, FL 33304 | Oil & Gas Operator | Feb 2026 |
| 739 | Valpoint Operating, LLC | Amarillo, TX 79101 | Oil & Gas Operator | Jul 2026 |
| 740 | Vantage Point Operating Co. | Houston, TX 77057 | Oil & Gas Operator | Dec 2014 |
| 741 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Mar 2026 |
| 742 | Vaughan III Ben F | Austin, TX 78768-2233 | Oil & Gas Operator | Feb 2026 |
| 743 | Vaughan Production Company, Inc. | Norman, OK 73072 | Oil & Gas Operator | Sep 2014 |
| 744 | Vector Energy Corporation | Houston, TX 77060 | Oil & Gas Operator | Jul 2026 |
| 745 | Veenker Resources Inc | Oklahoma City, OK 73113 | Oil & Gas Operator | May 2026 |
| 746 | Vess Oil Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jul 2026 |
| 747 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 748 | Vintage Resources Inc | Lindsay, OK 73052-0285 | Oil Operator | Dec 2007 |
| 749 | Vistatex Energy LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2026 |
| 750 | Vitol Inc. | Houston, TX 77098 | Oil & Gas Operator | Sep 2023 |
| 751 | VPR Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Oct 2013 |
| 752 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2026 |
| 753 | Walker Corporation (The) | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 754 | Walker Keith F | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2019 |
| 755 | Ward Oil Company An Okla Corp | McAlester, OK 74501 | Oil & Gas Operator | Feb 1993 |
| 756 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Apr 2026 |
| 757 | Warwick-Bacchus LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2026 |
| 758 | Warwick-Minerva LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2026 |
| 759 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Jul 2026 |
| 760 | Weimer & Fitzhugh | Tulsa, OK 74103-4102 | Oil & Gas Operator | Dec 1993 |
| 761 | Wellco Energy Inc | Harrah, OK 73045 | Oil & Gas Operator | Apr 2026 |
| 762 | Wellco Production LLC | Purcell, OK 73080-6833 | Oil & Gas Operator | Apr 2026 |
| 763 | Wenexco, Inc. | Streetman, TX 75859 | Oil & Gas Operator | Jul 2026 |
| 764 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | May 2026 |
| 765 | Wheatland Oil Inc | Enid, OK 73702-1032 | Oil & Gas Operator | Mar 2015 |
| 766 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Apr 2026 |
| 767 | White Operating Company | Oklahoma City, OK 73159-7136 | Oil & Gas Operator | Apr 2026 |
| 768 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Jul 2026 |
| 769 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2026 |
| 770 | Whitmar Natural Resources Co | Tulsa, OK 74136-9998 | Oil & Gas Operator | Jun 2004 |
| 771 | Whitmar Operating Company | Tulsa, OK 74103-3515 | Oil & Gas Operator | Apr 2009 |
| 772 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 773 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Jul 2026 |
| 774 | Williams Brothers Engineering Company | Tulsa, OK 74134-5885 | Oil & Gas Operator | May 2013 |
| 775 | Williams Royce S | Healdton, OK 73438-0306 | Oil & Gas Operator | Apr 2014 |
| 776 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2026 |
| 777 | Wilshire Enterprises Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 778 | Wimberley James A | Dallas, TX 75229-6180 | Oil & Gas Operator | Nov 2014 |
| 779 | Winchester Oil Corporation | Maysville, OK 73057-0600 | Oil & Gas Operator | Apr 2010 |
| 780 | Windsor Energy Inc | Dallas, TX 75204-3199 | Oil & Gas Operator | May 2006 |
| 781 | WLW Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | May 2026 |
| 782 | WR Oil & Gas LLC | Plano, TX 75024-3523 | Oil & Gas Operator | Apr 2026 |
| 783 | Xanadu Exploration Company | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2026 |
| 784 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Jul 2026 |
| 785 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | May 2026 |
| 786 | Young Marshall R Oil Co | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
| 787 | Zephyr Operating Co LLC | Oklahoma City, OK 73118-6035 | Oil & Gas Operator | Apr 2026 |