| 1 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | Dec 2025 |
| 2 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 3 | Anadarko E&P Company LP | Houston, TX 77251 | Oil & Gas Operator | Aug 2014 |
| 4 | Anderson Oil LTD. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2025 |
| 5 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 6 | Bexco Operating, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Dec 2025 |
| 7 | Bonfire Operating LLC | Cresson, TX 76035 | Oil & Gas Operator | Dec 2025 |
| 8 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 9 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Dec 2025 |
| 10 | C6 Operating, L.L.C. | Keatchie, LA 71046 | Oil & Gas Operator | Dec 2025 |
| 11 | Cago, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Dec 2025 |
| 12 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 13 | Cei Operating LLC | Katy, TX 77449 | Oil & Gas Operator | Dec 2025 |
| 14 | CG Operating, Inc. | Austin, TX 78759 | Oil & Gas Operator | Dec 2025 |
| 15 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 16 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 17 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 18 | Contango Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 19 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 20 | Dale Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 21 | Delaware Davis Petroleum Corp. | Houston, TX 77056 | Oil & Gas Operator | Jan 2000 |
| 22 | DJD Drilling Corporation | Graham, TX 76450 | Oil Operator | Jan 2010 |
| 23 | Eclipse Oil & Gas, Inc. | Midland, TX 79703 | Oil & Gas Operator | Dec 2025 |
| 24 | Endeavor Natural Gas, LP | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 25 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 26 | Eurovest Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 27 | Forestar Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2016 |
| 28 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Dec 2025 |
| 29 | Grit Oil & Gas, LLC | Houston, TX 77072 | Oil & Gas Operator | Apr 2019 |
| 30 | Hibbard Energy, LP | Whitehouse, TX 75791 | Oil & Gas Operator | Dec 2025 |
| 31 | Hicks Exploration, LLC | Dover, OK 73734 | Gas Operator | Feb 2025 |
| 32 | Kidd Production Co. | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 33 | Kovar Operating, LLC | Victoria, TX 77901 | Oil & Gas Operator | Sep 2021 |
| 34 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 35 | Lacy Operations, LTD. | Longview, TX 75606 | Oil & Gas Operator | Oct 2012 |
| 36 | Lobo Operating, Inc. | Houston, TX 77077 | Oil & Gas Operator | Dec 2024 |
| 37 | Lodel Energy Resources Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 38 | Lucas Energy, Inc. | Houston, TX 77067 | Oil & Gas Operator | Feb 2017 |
| 39 | Maersk Energy Inc. | Houston, TX 77042 | Oil & Gas Operator | Oct 1994 |
| 40 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 41 | Mineral Technologies, Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2025 |
| 42 | Noramco Production, LLC | Midland, TX 79710 | Oil & Gas Operator | Jan 2023 |
| 43 | Odessa Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 44 | Ows Energy, Inc. | Montgomery, TX 77356 | Oil & Gas Operator | Dec 2025 |
| 45 | Palmer Petroleum, Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2025 |
| 46 | Permian Natural Resources | Pflugerville, TX 78660 | Oil & Gas Operator | Dec 2025 |
| 47 | Petro-Hunt Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2003 |
| 48 | Petroleum Technical Services Co. | Midland, TX 79707 | Oil & Gas Operator | Dec 2004 |
| 49 | Pinnacle Operating Company, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Dec 2025 |
| 50 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 51 | Prize Exploration & Prod, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 52 | R. Lacy Services, LTD. | Longview, TX 75606 | Oil & Gas Operator | Dec 2025 |
| 53 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 54 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Dec 2025 |
| 55 | Rki Energy Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2021 |
| 56 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 57 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 58 | Salt Creek Production, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Dec 2025 |
| 59 | Saratoga Resources, Inc. | Houston, TX 77077 | Oil & Gas Operator | Jul 1994 |
| 60 | Shelby Boswell Operator, LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2025 |
| 61 | Shelby Production Co. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2009 |
| 62 | Shinnery Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 63 | Shoco Production LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 64 | Shoco Production, L.P. | Kilgore, TX 75663 | Oil & Gas Operator | May 2020 |
| 65 | Shuler Drilling Co., Inc. | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2025 |
| 66 | Silver Hill Energy Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 67 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 68 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 69 | Sonerra Resources Corporation | Nacogdoches, TX 75963 | Oil & Gas Operator | Dec 2025 |
| 70 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 71 | Stelzer, J. C. | Post, TX 79356 | Oil & Gas Operator | Dec 1995 |
| 72 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 73 | Swift Energy Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Jun 2017 |
| 74 | Tana Oil And Gas Corporation | Irving, TX 75062 | Oil & Gas Operator | Mar 2000 |
| 75 | TCF Energy, Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 76 | Texaco E & P Inc. | Houston, TX 77099 | Oil & Gas Operator | Dec 2025 |
| 77 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Jan 2001 |
| 78 | United Oil & Minerals, Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2001 |
| 79 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Jun 2025 |
| 80 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 81 | Williams, Clayton W., Jr., Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 82 | Wilmoth Interests, Inc. | Marion Center, PA 15759 | Oil & Gas Operator | Aug 2025 |
| 83 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 84 | Young, Clint Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |