| 1 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2026 |
| 2 | T. L. J. Incorporated | Big Lake, TX 76932 | Oil & Gas Operator | Dec 1998 |
| 3 | T.G.B., Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 4 | T.O.I. | Midland, TX 79710 | Oil & Gas Operator | Mar 2001 |
| 5 | Tacor Resources Inc | Midland, TX 79705 | Oil & Gas Operator | Sep 2026 |
| 6 | Tall City Operations LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2016 |
| 7 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 8 | Taurus Exploration U.S.A., Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 1998 |
| 9 | Taurus Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2026 |
| 10 | Taurus Petroleum, Inc. (A) | San Antonio, TX 78259 | Oil & Gas Operator | Jul 1996 |
| 11 | Taylor, J. S. Inc. | Lewisville, TX 75057 | Oil & Gas Operator | Sep 2026 |
| 12 | TC3 Energy Company | Dallas, TX 75248 | Oil & Gas Operator | Sep 2026 |
| 13 | Tejas Jack Sales, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Sep 2026 |
| 14 | Tejones Operating Corporation | San Antonio, TX 78217 | Oil & Gas Operator | Sep 2026 |
| 15 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Sep 2026 |
| 16 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | Sep 2026 |
| 17 | Texaco E & P Inc. | Houston, TX 77099 | Oil & Gas Operator | Sep 2026 |
| 18 | Texana Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2026 |
| 19 | Texas Crude Operator, Inc. | Houston, TX 77098 | Oil & Gas Operator | Aug 2017 |
| 20 | Texas Vanguard Oil Company | Austin, TX 78720 | Oil & Gas Operator | Jan 2014 |
| 21 | Texas-Ohio Producing Company | Spring, TX 77383 | Oil & Gas Operator | Jul 1995 |
| 22 | Texcal Resources, Inc. | Plano, TX 75094 | Oil & Gas Operator | Apr 1994 |
| 23 | Texland Petroleum Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2003 |
| 24 | Texland Petroleum, L.P. | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2026 |
| 25 | Texland-Rector & Schumacher | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2000 |
| 26 | Texon Oil Company, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 27 | Thomas Oil And Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | May 2019 |
| 28 | Thompson, J. Cleo | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
| 29 | THP Operating LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Sep 2026 |
| 30 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 31 | Three-B Oil Company, The | Monahans, TX 79756 | Oil & Gas Operator | Sep 2026 |
| 32 | Tidlow | Santa Fe, NM 87508 | Oil & Gas Operator | Dec 2007 |
| 33 | Tidwell Production Company | Sonora, TX 76950 | Oil & Gas Operator | Sep 2026 |
| 34 | Tipperary Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2014 |
| 35 | TMBR/Sharp Drilling, Inc. | Midland, TX 79703 | Oil & Gas Operator | Feb 2004 |
| 36 | Toc Energy Resources, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2026 |
| 37 | Topat Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Sep 2017 |
| 38 | Townsend Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2021 |
| 39 | Tpet, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |
| 40 | Tracy Production | Lindale, TX 75771 | Oil & Gas Operator | Sep 2026 |
| 41 | Travers Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Sep 2026 |
| 42 | Trek Petroleum Company, Inc. | Midland, TX 79707 | Oil & Gas Operator | Sep 2026 |
| 43 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Sep 2026 |
| 44 | Trenna Oil Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2013 |
| 45 | Triple "N" Services, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 46 | Triple Crown Resources, LLC | Dallas, TX 75201 | Oil & Gas Operator | Sep 2026 |
| 47 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Sep 2026 |
| 48 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 49 | Tripp & Sons, LLC | Odessa, TX 79768 | Oil & Gas Operator | Sep 2026 |
| 50 | Tristar Exploration, Inc | Pflugerville, TX 78660 | Oil & Gas Operator | Sep 2026 |
| 51 | Trojan Oil Company, LLC | Big Lake, TX 76932 | Oil Operator | Sep 2026 |
| 52 | Tucker Drilling Company, Inc. | San Angelo, TX 76903 | Oil & Gas Operator | Jul 1996 |
| 53 | Tularosa Operating Company | Kerrville, TX 78029 | Oil & Gas Operator | Mar 2024 |
| 54 | Tumbleweed Energy Limited | Midland, TX 79704 | Oil & Gas Operator | Dec 2022 |
| 55 | TXP, Incorporated | San Angelo, TX 76906 | Oil & Gas Operator | Sep 2026 |