| 1 | T & D Oil | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 2 | T-D Oil Inc | Cement, OK 73017-0065 | Oil & Gas Operator | May 2020 |
| 3 | T-K Exploration Company | Oklahoma City, OK 73102-7029 | Oil & Gas Operator | Mar 2015 |
| 4 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 5 | Tack Operating LLC | Oklahoma City, OK 73172-1492 | Oil & Gas Operator | Aug 2021 |
| 6 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jan 2025 |
| 7 | Tarrant Tracy Dba Trace Oil | Crescent, OK 73028 | Oil & Gas Operator | Feb 2021 |
| 8 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 9 | TD Operating Inc | Hinton, OK 73047 | Oil & Gas Operator | Jan 2025 |
| 10 | Te-Ray Energy, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Dec 2024 |
| 11 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2025 |
| 12 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Dec 2024 |
| 13 | Templar Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2024 |
| 14 | Tenaska Marketing Ventures | Omaha, NE 68154 | Oil & Gas Operator | Mar 2021 |
| 15 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2024 |
| 16 | Teocalli Exploration LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2025 |
| 17 | Territory Resources LLC | Stillwater, OK 74074-1869 | Oil & Gas Operator | Feb 2025 |
| 18 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 19 | Texaco Exploration And Production Inc | Houston, TX 77236 | Oil & Gas Operator | Nov 2024 |
| 20 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 21 | Texas Mineral Group | Midland, TX 79705 | Oil & Gas Operator | Aug 2013 |
| 22 | Texas Southwest Gas LLC | Tulsa, OK 74121 | Oil & Gas Operator | Oct 2022 |
| 23 | Texinia Oil & Gas Inc. | Dallas, TX 75214 | Oil & Gas Operator | Dec 2024 |
| 24 | Three-N-One | | Oil Operator | Oct 2020 |
| 25 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 26 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 27 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 28 | Total Petroleum Inc | Denver, CO 80201-0500 | Oil & Gas Operator | Nov 2006 |
| 29 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 30 | Tower Wanda L Nations | Oklahoma City, OK 73123 | Oil & Gas Operator | Aug 1996 |
| 31 | Trace Oil & Gas LP | Cement, OK 73017 | Oil & Gas Operator | Dec 2024 |
| 32 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 33 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Jan 2025 |
| 34 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Jan 2025 |
| 35 | Triad Of Oklahoma Inc | | Oil & Gas Operator | Feb 1996 |
| 36 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 37 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2025 |
| 38 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 39 | Troy Energy Operating LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2024 |
| 40 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2025 |
| 41 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2025 |
| 42 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Jan 2025 |
| 43 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 44 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |