| 6001 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 6002 | Triumph Energy Inc | Lafayette, LA 70505 | Oil & Gas Operator | Nov 2015 |
| 6003 | Triumph Energy Partners LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Jan 2026 |
| 6004 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 6005 | Trivestco Energy Company | Ponca City, OK 74601 | Oil & Gas Operator | Feb 2026 |
| 6006 | Trojan Resources LLC | Sapulpa, OK 74066-8095 | Oil Operator | Feb 2026 |
| 6007 | Trout Disposal Well Inc | Hammon, OK 73650 | Oil & Gas Operator | Jan 2025 |
| 6008 | Troy Energy Operating LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2026 |
| 6009 | Troyer Howard E | Tulsa, OK 74133-8016 | Oil & Gas Operator | Dec 2014 |
| 6010 | TRP Operating LLC | Houston, TX 77024 | Oil & Gas Operator | May 2026 |
| 6011 | TRP-Ok Properties LLC | Norman, OK 73072 | Oil & Gas Operator | Feb 2026 |
| 6012 | Tru Operating LLC | Denton, TX 76201 | Oil & Gas Operator | Apr 2023 |
| 6013 | Truckers Disposal Inc | Skiatook, OK 74070 | Oil & Gas Operator | Feb 2026 |
| 6014 | True Performance Administrators LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 6015 | Trueblood Resources, Inc. | Denver, CO 80222 | Oil & Gas Operator | May 2026 |
| 6016 | Truevine Gas Company | Ada, OK 74821-1422 | Oil & Gas Operator | Jan 2026 |
| 6017 | Truevine Operating LLC | Ada, OK 74821-1422 | Oil & Gas Operator | Feb 2026 |
| 6018 | Truluck Enterprises LLC | Wichita Falls, TX 76308-4454 | Oil & Gas Operator | Apr 2015 |
| 6019 | Tucker Gary & Deedee | Jennings, OK 74038 | Oil & Gas Operator | Jan 2026 |
| 6020 | Tucker Ron & Co | Norman, OK 73069-8511 | Gas Operator | Sep 2017 |
| 6021 | Tucker, Timothy R | | Oil Operator | Dec 2025 |
| 6022 | Tucson Oil & Gas Inc | | Oil & Gas Operator | Aug 1994 |
| 6023 | Tulsa Energy Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2013 |
| 6024 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Feb 2026 |
| 6025 | Tulsa Minerals Inc | Tulsa, OK 74136-1045 | Oil & Gas Operator | May 2013 |
| 6026 | Tulum Corporation | Oklahoma City, OK 73101-0125 | Oil & Gas Operator | Feb 2025 |
| 6027 | Turnbow John R Company | Tulsa, OK 74120-2420 | Oil & Gas Operator | Aug 2006 |
| 6028 | Turner John O | Drumright, OK 74030-1216 | Oil & Gas Operator | Feb 1998 |
| 6029 | Turner Oil Company | Yale, OK 74085-0234 | Oil & Gas Operator | Nov 2014 |
| 6030 | Turner Randall L | Duncan, OK 73533-4826 | Oil Operator | Oct 2025 |
| 6031 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2026 |
| 6032 | Turntable Energy Inc | Ponca City, OK 74604 | Oil & Gas Operator | Oct 2025 |
| 6033 | Turpin Ledon Production | Ada, OK 74820-0549 | Oil Operator | Dec 2025 |
| 6034 | Tuscany Operating LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2014 |
| 6035 | Tuthill S Keith & Bill Barbee | Amarillo, TX 79101-1427 | Oil & Gas Operator | Dec 2004 |
| 6036 | Twain Energy LLC | Ridgeland, MS 39157 | Oil & Gas Operator | Feb 2026 |
| 6037 | Twenty First Century Res Inc | Lajolla, CA 92037-7044 | Oil & Gas Operator | Mar 2015 |
| 6038 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2026 |
| 6039 | Twilight Energy LLC | Fort Worth, TX 76185 | Oil & Gas Operator | May 2026 |
| 6040 | Twin Eagle Petroleum Corp | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2002 |
| 6041 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2026 |
| 6042 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Jan 2026 |
| 6043 | Two Gems Company | McAlester, OK 74502-1996 | Oil & Gas Operator | Jan 2026 |
| 6044 | Two Pines | Drumright, OK 74030-5502 | Oil & Gas Operator | Feb 2012 |
| 6045 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 6046 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 6047 | Tyler Enterprises Inc | Bristow, OK 74010-3192 | Oil & Gas Operator | Feb 2004 |
| 6048 | Tyler, Scott A | | Oil & Gas Operator | Jan 2026 |
| 6049 | Tyler, Steven Lee | | Oil Operator | May 2014 |
| 6050 | Tyson Gary | Hobart, OK 73651-6413 | Oil & Gas Operator | Mar 2018 |
| 6051 | Tyson Olan | Hobart, OK 73651-6413 | Oil & Gas Operator | Apr 2015 |
| 6052 | Tytan Operating Company LLC | Edmond, OK 73083-3794 | Oil & Gas Operator | May 2016 |
| 6053 | U S Drilling Company Inc | Holdenville, OK 74848-0913 | Oil & Gas Operator | Mar 2017 |
| 6054 | U. S. Energy Development Corporation | Fort Worth, TX 76164 | Oil & Gas Operator | May 2026 |
| 6055 | U.S. Oil Reclaimers, LLC | | Oil Operator | Jun 2023 |
| 6056 | Ultramar Oil & Gas LTD | Houston, TX 77060 | Oil & Gas Operator | Jul 1995 |
| 6057 | Umberham Oil Company Inc | Oklahoma City, OK 73151-4000 | Oil & Gas Operator | Feb 2026 |
| 6058 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 6059 | Unbridled Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2026 |
| 6060 | Underwood Oil And Gas LLC | Chandler, OK 74834-1414 | Oil & Gas Operator | Feb 2026 |
| 6061 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 6062 | Union Texas Petroleum Corp | Houston, TX 77252-2120 | Oil & Gas Operator | Dec 2014 |
| 6063 | Union Valley Petroleum Corp | Enid, OK 73701 | Oil & Gas Operator | Feb 2026 |
| 6064 | Unit Drilling & Exploration Co | Tulsa, OK 74132-5300 | Oil & Gas Operator | Dec 2025 |
| 6065 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | May 2026 |
| 6066 | United Energy & Expl Inc | Ada, OK 74821-2449 | Oil & Gas Operator | Feb 2026 |
| 6067 | United Energy & Exploration LLC | Ada, OK 74821 | Oil & Gas Operator | Feb 2026 |
| 6068 | United Energy Develop Co LTD | Bartlesville, OK 74003 | Oil Operator | Mar 2004 |
| 6069 | United Energy Operating, LLC | Edmond, OK 73083 | Oil & Gas Operator | May 2026 |
| 6070 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Jan 2026 |
| 6071 | United Primary Resources Inc | Milton, WA 98354-9361 | Oil & Gas Operator | Feb 2016 |
| 6072 | United Producers Inc | Broken Arrow, OK 74012-8247 | Oil & Gas Operator | Mar 2020 |
| 6073 | United Production Company LLC | Edmond, OK 73003 | Oil & Gas Operator | Feb 2026 |
| 6074 | United States Gypsum Company | Oakfield, NY 14125 | Oil & Gas Operator | Dec 2024 |
| 6075 | United Texas Petroleum Inc. | McKinney, TX 75070 | Oil & Gas Operator | May 2026 |
| 6076 | Universal Drilling Company | Denver, CO 80203 | Oil & Gas Operator | Sep 2003 |
| 6077 | Universal Exploration Inc | Wadsworth, OH 44281-9460 | Oil & Gas Operator | Feb 2012 |
| 6078 | Universal Fuels Company | | Oil & Gas Operator | Oct 1993 |
| 6079 | Upland Operating, LLC | Dallas, TX 75226 | Oil & Gas Operator | May 2026 |
| 6080 | Upland Production Company | Edmond, OK 73083 | Oil & Gas Operator | May 2026 |
| 6081 | Upland Resources, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Dec 2009 |
| 6082 | Uplands Resources Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Feb 2026 |
| 6083 | Uptex Operating, L.P. | Dallas, TX 75201 | Oil & Gas Operator | May 2010 |
| 6084 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | May 2026 |
| 6085 | Usedc Okc LLC | Getzville, NY 14068-1296 | Oil & Gas Operator | May 2018 |
| 6086 | V S Oil Company | Burkburnett, TX 76354 | Oil & Gas Operator | May 2026 |
| 6087 | Vaca Operating Company LLC | Pacific PLSDS, CA 90272 | Oil & Gas Operator | Aug 2017 |
| 6088 | Vaco Oil Company | Cleveland, OK 74020 | Oil & Gas Operator | Jun 2003 |
| 6089 | Valancy Operating LLC | Goldsby, OK 73093 | Oil & Gas Operator | Jan 2026 |
| 6090 | Valar Petroleum Inc | Houston, TX 77069 | Oil & Gas Operator | May 2006 |
| 6091 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | May 2026 |
| 6092 | Valiant Oil & Inv Co | | Oil & Gas Operator | Jan 2026 |
| 6093 | Validus Energy II Midcon LLC | Denver, CO 80202 | Oil & Gas Operator | May 2026 |
| 6094 | Validus Inc | Fort Lauderdale, FL 33304 | Oil & Gas Operator | Feb 2026 |
| 6095 | Valjohn Energy Corporation | Dover, OK 73734 | Oil & Gas Operator | Feb 2026 |
| 6096 | Valley Oil & Gas Inc | | Oil & Gas Operator | Nov 2013 |
| 6097 | Valley Petrol Consulting Inc | Denton, TX 76205 | Oil Operator | Feb 2026 |
| 6098 | Valpoint Operating, LLC | Amarillo, TX 79101 | Oil & Gas Operator | May 2026 |
| 6099 | Van Dall, Don | | Oil Operator | Mar 2015 |
| 6100 | Van Horn I H | Tulsa, OK 74145-5715 | Oil & Gas Operator | Mar 2001 |