| 1 | 31 Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2025 |
| 2 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | Sep 2025 |
| 3 | Basa Resources, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Sep 2025 |
| 4 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 5 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | May 2025 |
| 6 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 7 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 8 | Buckhorn Operating LLC | MT Enterprise, TX 75681 | Oil & Gas Operator | Sep 2025 |
| 9 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 2025 |
| 10 | C6 Operating, L.L.C. | Keatchie, LA 71046 | Oil & Gas Operator | Sep 2025 |
| 11 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 12 | Cameron Exploration, Inc. | Longview, TX 75604 | Oil & Gas Operator | Sep 2025 |
| 13 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 14 | Carter Resources | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2005 |
| 15 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 16 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2025 |
| 17 | Common Resources L.L.C. | The Woodlands, TX 77380 | Oil & Gas Operator | May 2010 |
| 18 | Comstock Oil & Gas, LLC | Frisco, TX 75034 | Oil & Gas Operator | Sep 2025 |
| 19 | Contango Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 20 | Covey Park Resources LLC | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 21 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 22 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 23 | Dual Production Partners, LLC | Nacogdoches, TX 75963 | Oil & Gas Operator | Sep 2025 |
| 24 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2025 |
| 25 | Eclipse Oil & Gas, Inc. | Midland, TX 79703 | Oil & Gas Operator | Sep 2025 |
| 26 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 27 | Enerquest Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2025 |
| 28 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 29 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 30 | Etopsi Oil And Gas, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2025 |
| 31 | Exco Operating Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Sep 2025 |
| 32 | Exodus Energy, Inc. | Huntington Beach, CA 92615 | Oil & Gas Operator | Jul 2018 |
| 33 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 34 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Sep 2025 |
| 35 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Sep 2025 |
| 36 | Fossil Resources, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Oct 2017 |
| 37 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 38 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 39 | Harding Company | Dallas, TX 75244 | Oil & Gas Operator | Jan 2015 |
| 40 | Hibbard Energy, LP | Whitehouse, TX 75791 | Oil & Gas Operator | Sep 2025 |
| 41 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 42 | Inland Oil And Gas Company, Inc. | Chireno, TX 75937 | Oil & Gas Operator | Jun 2005 |
| 43 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 44 | Jeffcoat Production Company Inc. | Spurger, TX 77660 | Oil & Gas Operator | Oct 2024 |
| 45 | Jurassic Exploration, Inc. | Longview, TX 75601 | Oil & Gas Operator | Sep 2025 |
| 46 | KJ Energy, LLC | MT Enterprise, TX 75681 | Oil & Gas Operator | Jul 2024 |
| 47 | KT Operating Company LLC | Dallas, TX 75231 | Oil & Gas Operator | Feb 2010 |
| 48 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | Sep 2025 |
| 49 | Liberty Operating Company, Inc. | Lake Dallas, TX 75065 | Oil & Gas Operator | Mar 2008 |
| 50 | Lime Rock Resources III-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 51 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Jul 2025 |
| 52 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Sep 2025 |
| 53 | Merit Energy Company, LLC | Dallas, TX 75009 | Oil & Gas Operator | Apr 2025 |
| 54 | Midas Resources, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Sep 2025 |
| 55 | North Lake Resources LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Sep 2025 |
| 56 | Odessa Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 57 | Ovintiv USA Inc. | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 58 | Palmer Petroleum Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2025 |
| 59 | Pedeco, Inc. | Casper, WY 82601 | Oil & Gas Operator | Mar 2008 |
| 60 | Pegasus Petroleum Corporation | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Sep 2025 |
| 61 | Petroleum Technical Services Co. | Midland, TX 79707 | Oil & Gas Operator | Dec 2004 |
| 62 | Pine Wave Energy Partners Op,LLC | Dallas, TX 75205 | Oil & Gas Operator | Sep 2025 |
| 63 | Placid Oil Company | Houston, TX 77227 | Oil & Gas Operator | Mar 2008 |
| 64 | Plains Exploration & Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 65 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 66 | Radius Operating, LLC | Round Rock, TX 78664 | Oil & Gas Operator | Sep 2025 |
| 67 | Rainbow Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2007 |
| 68 | Red River Oil & Gas LLC | Cherry Hills, CO 80110 | Oil & Gas Operator | Feb 2025 |
| 69 | Rosetta Energy Partners, L P | Dallas, TX 75219 | Oil & Gas Operator | Jul 2009 |
| 70 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 71 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 72 | Shelby Boswell Operator, LLC | Dallas, TX 75225 | Oil & Gas Operator | Sep 2025 |
| 73 | Sheridan Production Co III, LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2025 |
| 74 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | May 2025 |
| 75 | Shuler Drilling Co., Inc. | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2025 |
| 76 | Silver Hill Energy Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Sep 2025 |
| 77 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Sep 2025 |
| 78 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2025 |
| 79 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 80 | Sonerra Resources Corporation | Nacogdoches, TX 75963 | Oil & Gas Operator | Sep 2025 |
| 81 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 82 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 83 | SW Operating, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Sep 2000 |
| 84 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Jun 2025 |
| 85 | Tana Oil And Gas Corporation | Irving, TX 75062 | Oil & Gas Operator | Mar 2000 |
| 86 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 87 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 88 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Apr 2025 |
| 89 | W & T Offshore, Inc. | Houston, TX 77057 | Oil & Gas Operator | Sep 2025 |
| 90 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Sep 2025 |
| 91 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Jun 2025 |
| 92 | Weyerhaeuser Company | Crossett, AR 71635 | Oil & Gas Operator | Sep 1994 |
| 93 | Winston Land & Cattle I, LTD. | Lufkin, TX 75902 | Oil & Gas Operator | Nov 2014 |
| 94 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Sep 2025 |