| 1 | T & O Gas Co | | Oil Operator | May 2001 |
| 2 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Oct 2024 |
| 3 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2024 |
| 4 | Tecolote Energy Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 5 | Temex Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 6 | Templar Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2024 |
| 7 | Tenaska Marketing Ventures | Omaha, NE 68154 | Oil & Gas Operator | Mar 2021 |
| 8 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Sep 2024 |
| 9 | Teocalli Exploration LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Oct 2024 |
| 10 | Terra Production Company | Okemah, OK 74859-5924 | Oil & Gas Operator | Apr 2020 |
| 11 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 12 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Aug 2024 |
| 13 | Texas Southwest Gas LLC | Tulsa, OK 74121 | Oil & Gas Operator | Oct 2022 |
| 14 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 15 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Oct 2024 |
| 16 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 17 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Oct 2024 |
| 18 | Tomlinson Oil Co. Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jun 2023 |
| 19 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 20 | Total Petroleum Inc | Denver, CO 80201-0500 | Oil & Gas Operator | Nov 2006 |
| 21 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 22 | Trans Oil Marketing LLC | Abilene, TX 79608 | Oil Operator | Aug 2023 |
| 23 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 24 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 25 | Trigger'S Disposal LLC | Sayre, OK 73662-2913 | Oil Operator | Sep 2022 |
| 26 | Triple "S" Gas, Inc. | Dallas, TX 75355 | Oil & Gas Operator | Dec 2024 |
| 27 | Trissell Alva Lee | Willow, OK 73673-9602 | Oil Operator | Apr 2020 |
| 28 | Troy Energy Operating LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Sep 2024 |
| 29 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |