| 28701 | T & G Oil Operations LLC | | Oil Operator | Jun 2025 |
| 28702 | T & G Oil, Inc. | White Oak, TX 75693 | Oil & Gas Operator | Dec 2010 |
| 28703 | T & H Drilling | Middleport, OH 45760 | Oil & Gas Operator | Dec 2009 |
| 28704 | T & I Petroleum Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2005 |
| 28705 | T & J Oil Production, L.L.C. | Lone Grove, OK 73443 | Oil & Gas Operator | Oct 2025 |
| 28706 | T & J Operating | Ada, OK 74821-1547 | Oil Operator | Feb 2012 |
| 28707 | T & K Oil Inc | Stephens, AR 71764 | Oil Operator | Jan 2025 |
| 28708 | T & L Oil Production | | Oil Operator | Jan 2025 |
| 28709 | T & L Production | | Oil Operator | May 1987 |
| 28710 | T & L Production Company | | Oil Operator | Feb 1984 |
| 28711 | T & M Gauging | | Oil Operator | Oct 2006 |
| 28712 | T & M Oil & Royalty | Ada, OK 74820 | Oil & Gas Operator | Sep 2025 |
| 28713 | T & M Oil Company | Midlothian, TX 76065 | Oil & Gas Operator | Dec 2025 |
| 28714 | T & O Gas Co | | Oil Operator | May 2001 |
| 28715 | T & P Exploration | Addison, TX 75006 | Oil & Gas Operator | Aug 1993 |
| 28716 | T & P Oil & Gas, L.L.C. | Overland Park, KS 66212 | Oil Operator | Dec 2009 |
| 28717 | T & R Investments, Inc. | Borger, TX 79008 | Oil & Gas Operator | Nov 1995 |
| 28718 | T & R Oil Company, A General Partnership | Moline, KS 67353 | Oil Operator | Dec 2019 |
| 28719 | T & S Oil & Gas, LLC | Graham, TX 76450 | Gas Operator | Dec 2025 |
| 28720 | T & T Compression Inc | Clymer, PA 15728-1014 | Gas Operator | Dec 2024 |
| 28721 | T & T Contracting Dba Hulman Contracting, LLC | Rockfield, KY 42274 | Oil & Gas Operator | Dec 2023 |
| 28722 | T & T Oil Co. | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2002 |
| 28723 | T & T Production Co. | Victoria, TX 77902 | Oil & Gas Operator | Feb 1995 |
| 28724 | T & W Ward Oil LLC | Blackwell, OK 74631 | Oil Operator | Aug 2025 |
| 28725 | T - C Oil Company | Refugio, TX 78377 | Oil & Gas Operator | Jan 2012 |
| 28726 | T And DS Lube Doctors LLC | Carlsbad, NM 88220 | Gas Operator | Oct 2025 |
| 28727 | T And L Oil Inc | Tonkawa, OK 74653-4530 | Oil & Gas Operator | Oct 2025 |
| 28728 | T B C Inc | Coweta, OK 74429 | Oil & Gas Operator | Apr 2020 |
| 28729 | T B Drilling Co | Moxahala, OH 43761 | Oil & Gas Operator | Dec 1998 |
| 28730 | T B K Energy Company | Brenham, TX 77833 | Oil & Gas Operator | Oct 2025 |
| 28731 | T Bar M Energy Resources LLC | Mounds, OK 74047 | Oil & Gas Operator | Sep 2025 |
| 28732 | T C Craighead & Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Aug 2019 |
| 28733 | T C Production | | Oil Operator | May 1994 |
| 28734 | T D Cox Oil Corporation | | Oil & Gas Operator | Sep 2025 |
| 28735 | T D Energy Company Inc | Broken Arrow, OK 74011-3953 | Oil & Gas Operator | Feb 2015 |
| 28736 | T Dozer D Oil Co. | Goree, TX 76363 | Oil & Gas Operator | Dec 2025 |
| 28737 | T E F Inc | Madill, OK 73446-6656 | Oil & Gas Operator | Jul 2023 |
| 28738 | T E L Oil & Gas Corporation | Guymon, OK 73941 | Gas Operator | Oct 2025 |
| 28739 | T G & S Oil | Marietta, OK 73448 | Oil & Gas Operator | Sep 2025 |
| 28740 | T G T Petroleum Corporation | Wichita, KS 67275 | Oil & Gas Operator | Jun 2025 |
| 28741 | T H Production Co. | | Oil & Gas Operator | Mar 1994 |
| 28742 | T I Energy Services Inc | | Oil & Gas Operator | Dec 2003 |
| 28743 | T Investments Inc | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Mar 2011 |
| 28744 | T J D Oil Compan | | Oil Operator | Feb 1989 |
| 28745 | T Jack Foster Trust A | Foster City, CA 94404 | Gas Operator | Sep 1995 |
| 28746 | T JS Oil & Gas Inc | Fresno, OH 43824 | Oil & Gas Operator | Dec 2023 |
| 28747 | T L C Oil Inc | Seminole, OK 74868 | Oil & Gas Operator | Sep 2025 |
| 28748 | T M Hopkins Operating Co | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2002 |
| 28749 | T P Production Co | Denver, CO 80202 | Oil & Gas Operator | Nov 1996 |
| 28750 | T S B T Oil & Gas Properties | Moore, OK 73160-8126 | Oil & Gas Operator | Jan 2018 |
| 28751 | T T & T Inc | Shawnee, OK 74802-3694 | Oil & Gas Operator | Jan 1994 |
| 28752 | T W Clemons Operating Co., LLC | Minden, LA 71055 | Oil & Gas Operator | Dec 2025 |
| 28753 | T W Law LLC | Muskogee, OK 74403-6736 | Oil Operator | Aug 2025 |
| 28754 | T Willoughby, LLC | Ada, OK 74820 | Oil Operator | Sep 2025 |
| 28755 | T X P Inc Formerly Petrotech Inc | | Oil & Gas Operator | Jul 1992 |
| 28756 | T&R Energy Services | Pampa, TX 79065 | Oil & Gas Operator | Dec 2025 |
| 28757 | T&T Energy LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 28758 | T, F & B Oil Company, LLC | | Oil Operator | Jan 2013 |
| 28759 | T-5 Leasing, LLC | | Oil Operator | Dec 2013 |
| 28760 | T-Bar Exploration, Inc. | Sterling, KS 67579 | Oil Operator | Apr 1998 |
| 28761 | T-Bar-X Limited Company | Houston, TX 77057 | Oil & Gas Operator | Dec 2005 |
| 28762 | T-Boc Inc. | | Oil & Gas Operator | Apr 2016 |
| 28763 | T-C Oil Company, LLC | Refugio, TX 78377 | Oil & Gas Operator | Dec 2025 |
| 28764 | T-D Oil Inc | Cement, OK 73017-0065 | Oil & Gas Operator | May 2020 |
| 28765 | T-K Exploration Company | Oklahoma City, OK 73102-7029 | Oil & Gas Operator | Mar 2015 |
| 28766 | T-M Well Service | Jefferson, TX 75657 | Oil & Gas Operator | Sep 2004 |
| 28767 | T-M Well Service, L.L.C. | Jefferson, TX 75657 | Oil & Gas Operator | Dec 2024 |
| 28768 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2025 |
| 28769 | T-R Oil | Mapleton, KS 66754 | Oil & Gas Operator | May 2018 |
| 28770 | T-Rex Oil Inc | Broomfield, CO 80021 | Oil Operator | Feb 2011 |
| 28771 | T-Square Petroleum Co. | Rising Star, TX 76471 | Oil & Gas Operator | Dec 2025 |
| 28772 | T-Y Development Corp | Perryton, TX 79070 | Oil & Gas Operator | Dec 2025 |
| 28773 | T. A. Atkinson Opr. | | Gas Operator | Dec 1997 |
| 28774 | T. A. W. Company | Kingsbury, TX 78638 | Oil & Gas Operator | Dec 2025 |
| 28775 | T. And M. Production | Oil City, LA 71061 | Oil & Gas Operator | Dec 2025 |
| 28776 | T. C. Morrow Oil Co. | | Oil & Gas Operator | Apr 1991 |
| 28777 | T. D. Tedder | | Oil Operator | Dec 1991 |
| 28778 | T. E. Adams Petroleum Corp. | | Oil & Gas Operator | Oct 2025 |
| 28779 | T. J. Guido | | Oil & Gas Operator | Oct 1998 |
| 28780 | T. J. Lundy | | Oil Operator | Jan 2025 |
| 28781 | T. J. Oil And Gas, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2002 |
| 28782 | T. J. Operating Co., Inc. | | Oil & Gas Operator | Aug 1998 |
| 28783 | T. K. Stanley, Inc. | | Oil & Gas Operator | Jul 1982 |
| 28784 | T. L. J. Incorporated | Big Lake, TX 76932 | Oil & Gas Operator | Dec 1998 |
| 28785 | T. L. James & Co., Inc. | | Oil & Gas Operator | Oct 1992 |
| 28786 | T. M. Hopkins | | Oil & Gas Operator | Aug 2007 |
| 28787 | T. N. T. Energy Co. | Belcher, LA 71004 | Oil Operator | May 1991 |
| 28788 | T. N. T. Inc. | | Oil & Gas Operator | Jan 1987 |
| 28789 | T. N. T. Tribal - Luffey | | Gas Operator | Oct 1994 |
| 28790 | T. O. Kimbrell, LLC | | Oil & Gas Operator | Nov 2025 |
| 28791 | T. R. Production, Inc. | Pilot Point, TX 76258 | Oil & Gas Operator | Jul 2021 |
| 28792 | T. T. Production, Inc. | Haviland, KS 67059 | Oil & Gas Operator | Feb 2008 |
| 28793 | T. W. Drilling Co. | Abilene, TX 79601 | Oil & Gas Operator | Aug 2002 |
| 28794 | T. W. McGuire & Associates, Inc. | | Oil & Gas Operator | Nov 2018 |
| 28795 | T. West Bullock, SR. | | Oil & Gas Operator | Mar 1989 |
| 28796 | T.B. Lanford Et Al | | Oil Operator | Apr 1987 |
| 28797 | T.C. Harris Pumping LLC | Hennessey, OK 73742 | Gas Operator | Sep 2025 |
| 28798 | T.C.G. Oil Co. | Iola, KS 66749 | Oil Operator | Sep 2009 |
| 28799 | T.C.G. Oil Co., A General Partnership | Laharpe, KS 66755 | Oil Operator | Aug 2009 |
| 28800 | T.D. Operating Company, Inc. | New Braunfels, TX 78130 | Oil & Gas Operator | Nov 1999 |