| 1 | Tag Oil Co LLC | Ringling, OK 73456 | Oil & Gas Operator | Nov 2025 |
| 2 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 3 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2026 |
| 4 | Taylor R C Companies Inc | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | May 2021 |
| 5 | TD Operating Inc | Hinton, OK 73047 | Oil & Gas Operator | Feb 2026 |
| 6 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2026 |
| 7 | Tekenergy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 8 | Tema Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2009 |
| 9 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2025 |
| 10 | Teocalli Exploration LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Feb 2026 |
| 11 | Tessera Energy LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2026 |
| 12 | Tex-Ok Energy, Limited Partnership | Cody, WY 82414 | Oil & Gas Operator | Feb 2026 |
| 13 | Tex-Star Production | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 14 | Texaco Exploration & Prod Inc | Houston, TX 77236 | Oil & Gas Operator | Dec 2025 |
| 15 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 16 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2026 |
| 17 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 18 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 19 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Feb 2026 |
| 20 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 21 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 22 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 23 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Feb 2026 |
| 24 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 25 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Jan 2026 |
| 26 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Feb 2026 |
| 27 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 28 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 29 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 30 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Feb 2026 |
| 31 | Tuthill S Keith & Bill Barbee | Amarillo, TX 79101-1427 | Oil & Gas Operator | Dec 2004 |
| 32 | Twain Energy LLC | Ridgeland, MS 39157 | Oil & Gas Operator | Feb 2026 |
| 33 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 34 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |