| 1 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jul 2025 |
| 2 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 3 | Tcina Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2023 |
| 4 | Tekenergy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 5 | Tema Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2009 |
| 6 | Temex Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 7 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Jul 2025 |
| 8 | Teocalli Exploration LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jul 2025 |
| 9 | Tesoro Expl. & Prod. Company | San Antonio, TX 78216 | Gas Operator | Sep 2010 |
| 10 | Tex-Ok Energy, Limited Partnership | Cody, WY 82414 | Oil & Gas Operator | Jul 2025 |
| 11 | Tex-Star Production | Dallas, TX 75206 | Oil & Gas Operator | Jul 2025 |
| 12 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 13 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Jun 2025 |
| 14 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 15 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 16 | Texas Mineral Group | Midland, TX 79705 | Oil & Gas Operator | Aug 2013 |
| 17 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 18 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 19 | The Warren Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2016 |
| 20 | Three-D Resources, Inc. | Liberal, KS 67905 | Oil & Gas Operator | Jun 2025 |
| 21 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 22 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 23 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Jul 2025 |
| 24 | TLM Resources Inc | Enid, OK 73706-0641 | Gas Operator | Mar 2015 |
| 25 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |
| 26 | Toklan Oil Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 27 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 28 | Tower Energy Corporation | Sapulpa, OK 74067-0837 | Oil & Gas Operator | Mar 2015 |
| 29 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2025 |
| 30 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 31 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Oct 2025 |
| 32 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Jun 2025 |
| 33 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 34 | Trivestco Energy Company | Ponca City, OK 74601 | Oil & Gas Operator | Jul 2025 |
| 35 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Jul 2025 |
| 36 | Turner Oil Company | Yale, OK 74085-0234 | Oil & Gas Operator | Nov 2014 |
| 37 | Tuthill S Keith & Bill Barbee | Amarillo, TX 79101-1427 | Oil & Gas Operator | Dec 2004 |
| 38 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Jun 2025 |
| 39 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 40 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 41 | Tyson Olan | Hobart, OK 73651-6413 | Oil & Gas Operator | Apr 2015 |