| 1 | Tack Operating LLC | Oklahoma City, OK 73172-1492 | Oil & Gas Operator | Aug 2021 |
| 2 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2026 |
| 3 | Taylor R C Companies Inc | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | May 2021 |
| 4 | Te-Ray Energy Inc | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2026 |
| 5 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2026 |
| 6 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2025 |
| 7 | Tex-Ok Energy, Limited Partnership | Cody, WY 82414 | Oil & Gas Operator | Feb 2026 |
| 8 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 9 | Texaco Exploration & Prod Inc | Houston, TX 77236 | Oil & Gas Operator | Dec 2025 |
| 10 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 11 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Feb 2026 |
| 12 | Three D Resources Inc | Liberal, KS 67905 | Oil & Gas Operator | Dec 2025 |
| 13 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 14 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 15 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Feb 2026 |
| 16 | Todd John C | Oklahoma City, OK 73112-8049 | Oil & Gas Operator | May 2015 |
| 17 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 18 | Toklan Oil Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 19 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 20 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 21 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 22 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Feb 2026 |
| 23 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Apr 2026 |
| 24 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Jan 2026 |
| 25 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Feb 2026 |
| 26 | Trueblood Resources, Inc. | Denver, CO 80222 | Oil & Gas Operator | Apr 2026 |
| 27 | Tulsa Minerals Inc | Tulsa, OK 74136-1045 | Oil & Gas Operator | May 2013 |
| 28 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2026 |
| 29 | Tuthill S Keith & Bill Barbee | Amarillo, TX 79101-1427 | Oil & Gas Operator | Dec 2004 |
| 30 | Twain Energy LLC | Ridgeland, MS 39157 | Oil & Gas Operator | Feb 2026 |
| 31 | Twin Eagle Petroleum Corp | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2002 |
| 32 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2026 |
| 33 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Jan 2026 |
| 34 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 35 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |