| 1 | T & F Oil Company, LLC | | Oil Operator | Oct 2011 |
| 2 | T, F & B Oil Company, LLC | | Oil Operator | Jan 2013 |
| 3 | T. J. Guido | | Oil & Gas Operator | Oct 1998 |
| 4 | T. M. Hopkins | | Oil & Gas Operator | Aug 2007 |
| 5 | T. O. Kimbrell, LLC | | Oil & Gas Operator | Jul 2025 |
| 6 | T. West Bullock, SR. | | Oil & Gas Operator | Mar 1989 |
| 7 | Taurus Exploration U.S.A., Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 1998 |
| 8 | Tensas Delta Land Company | | Oil & Gas Operator | Apr 2002 |
| 9 | Tideway Oil Programs, Inc. | | Oil & Gas Operator | Oct 1980 |
| 10 | Titan Oil Corp. | | Oil & Gas Operator | Jan 2025 |
| 11 | Tredegar Properties, Inc. | | Oil Operator | Jun 1990 |
| 12 | Trendsetter Production Co, Inc | | Oil & Gas Operator | Jul 2008 |
| 13 | Triangle Oil & G G Cornwell | | Oil & Gas Operator | Nov 1981 |
| 14 | Triangle Oil Producers, Inc. | | Oil & Gas Operator | Jun 1998 |
| 15 | Trich Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2025 |
| 16 | Tyler Production, LLC | | Oil & Gas Operator | Jul 2013 |