| 1 | Talaria Oil & Gas LLC | Denver, CO 80203 | Oil Operator | Dec 2024 |
| 2 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2024 |
| 3 | Tana Oil And Gas Corporation | Irving, TX 75062 | Oil & Gas Operator | Mar 2000 |
| 4 | TC Oil And Gas, LLC | Denton, TX 76205 | Oil Operator | Dec 2024 |
| 5 | TD Natural Resources LLC | Cuero, TX 77954 | Oil & Gas Operator | Dec 2024 |
| 6 | TDC Engineering, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2024 |
| 7 | Tech Resources, Inc. | Georgetown, TX 78628 | Oil & Gas Operator | Dec 2001 |
| 8 | Tejones Operating Corporation | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2024 |
| 9 | Tenex Corporation | Houston, TX 77227 | Oil & Gas Operator | Dec 2007 |
| 10 | Tenison Oil Company | Abilene, TX 79605 | Oil & Gas Operator | Dec 2024 |
| 11 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 12 | Texas American Resources Company | Austin, TX 78701 | Oil & Gas Operator | Dec 2024 |
| 13 | Texas Consolidated Pet. Corp. | Fort Worth, TX 76109 | Oil & Gas Operator | Dec 2024 |
| 14 | Texas International Oper., LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2013 |
| 15 | Texcal Oil Co | Cuero, TX 77954 | Oil & Gas Operator | Feb 2006 |
| 16 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 17 | Texstar North America, Inc. | Waynesboro, MS 39367 | Oil & Gas Operator | Aug 1994 |
| 18 | The Houston Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2017 |
| 19 | Thomas, Mike | Nixon, TX 78140 | Oil Operator | Dec 2024 |
| 20 | Three J Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Dec 2024 |
| 21 | Tidal Petroleum, Inc. | Schertz, TX 78154 | Oil & Gas Operator | Dec 2024 |
| 22 | Tipperary Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | May 2014 |
| 23 | Tiza Energy, Inc. | Austin, TX 78715 | Oil & Gas Operator | Dec 2024 |
| 24 | Tiza Operating Company | Austin, TX 78716 | Oil & Gas Operator | Jan 2000 |
| 25 | Top Op, L.L.C. | Houston, TX 77077 | Oil & Gas Operator | May 2020 |
| 26 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 27 | Tower Resources Inc | Conroe, TX 77304 | Oil & Gas Operator | Dec 2024 |
| 28 | Tracker Oil & Gas, Inc. | Bastrop, TX 78602 | Oil & Gas Operator | Dec 2024 |
| 29 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Dec 2024 |
| 30 | Tri-C Resources, LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2024 |
| 31 | Tri-County Operating Company | Seguin, TX 78156 | Gas Operator | Feb 1997 |
| 32 | Truth Resources LP | Houston, TX 77090 | Oil Operator | Sep 2021 |
| 33 | Tsar Energy, LLC | Dallas, TX 75205 | Oil & Gas Operator | Dec 2024 |
| 34 | Tuleta Energy Partners, LLC | Norman, OK 73072 | Oil & Gas Operator | Dec 2024 |
| 35 | Tuskar (Texas), Inc. | Nichols Hill, OK 73116 | Oil & Gas Operator | Jan 2016 |