| 1 | 3-M Energy Corporation | San Angelo, TX 76902 | Oil & Gas Operator | Jun 2017 |
| 2 | 314 Operating | Rotan, TX 79546 | Oil Operator | Apr 2025 |
| 3 | 801 LLC | Artesia, NM 88211 | Oil & Gas Operator | Oct 2023 |
| 4 | A & T Oil Company | Midland, TX 79707 | Oil & Gas Operator | Sep 2008 |
| 5 | A A Production Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 1998 |
| 6 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2025 |
| 7 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 8 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 9 | Aggietech Oil, LTD. | Midland, TX 79701 | Oil & Gas Operator | Aug 2016 |
| 10 | Alegre Energy Operating, LP | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2005 |
| 11 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2025 |
| 12 | Allegro Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 13 | Alta Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 14 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 15 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 16 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 17 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 18 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 19 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Feb 2025 |
| 20 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Apr 2025 |
| 21 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 22 | Arrowhead Operating Inc. | Argyle, TX 76226 | Oil & Gas Operator | Apr 2025 |
| 23 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2025 |
| 24 | Autry Producing Co. | Cisco, TX 76437 | Oil & Gas Operator | Aug 2008 |
| 25 | Autry Producing Inc. | Cisco, TX 76437 | Oil Operator | Apr 2025 |
| 26 | Avalon TX Operating, LLC | Andrews, TX 79714 | Oil & Gas Operator | Jan 2023 |
| 27 | Badger Oil Corporation | Lafayette, LA 70505 | Oil & Gas Operator | Nov 2011 |
| 28 | Banam Corporation | Midland, TX 79702 | Oil & Gas Operator | Nov 2013 |
| 29 | Barnett Energy, Inc. | The Colony, TX 75056 | Oil & Gas Operator | Apr 2025 |
| 30 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Apr 2025 |
| 31 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 32 | Bayridge Texas Corp. | Big Spring, TX 79720 | Oil & Gas Operator | Jul 2004 |
| 33 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 34 | BBS Oil Field Services Inc | Post, TX 79356 | Oil & Gas Operator | Apr 2025 |
| 35 | Bedford Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Apr 2025 |
| 36 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 37 | Benson & Schoen Oil Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Apr 2012 |
| 38 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 39 | Bevo Production Co. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 2014 |
| 40 | BHB Operating Inc. | Fort Worth, TX 76137 | Oil & Gas Operator | Apr 2025 |
| 41 | Big Al Oil And Gas | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 42 | Big D Energy Company | New Braunfels, TX 78132 | Oil & Gas Operator | Apr 2025 |
| 43 | Bills, L. T. | Snyder, TX 79549 | Oil & Gas Operator | Apr 2025 |
| 44 | Bishop, D. L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2012 |
| 45 | Black Arrow Operating, LLC | Dennis, TX 76439 | Oil & Gas Operator | Apr 2025 |
| 46 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | Apr 2025 |
| 47 | Blair Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 48 | Blue River Inc. | Abilene, TX 79608 | Oil Operator | Apr 2025 |
| 49 | Blue Star Energy, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Apr 2025 |
| 50 | Bomar Oil & Gas, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Dec 2020 |
| 51 | Bomar Operating Co., LC | Bellaire, TX 77401 | Oil & Gas Operator | Apr 2025 |
| 52 | Boss Services, L.L.C. | Ira, TX 79527 | Oil & Gas Operator | Aug 2019 |
| 53 | Brahman Operating LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 54 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 55 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2025 |
| 56 | BRG Production Company | Tulsa, OK 74136-6338 | Oil & Gas Operator | Feb 2025 |
| 57 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2025 |
| 58 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 59 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Apr 2025 |
| 60 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 61 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Apr 2025 |
| 62 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 63 | Bta Oil Producers, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 64 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 65 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 66 | Bustamante Resources LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 67 | Byng Energy Group Inc | Enid, OK 73703 | Oil & Gas Operator | Apr 2025 |
| 68 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2025 |
| 69 | Cada Operating, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2004 |
| 70 | Cag Petroleum Corp. | Dallas, TX 75382 | Oil & Gas Operator | Apr 2025 |
| 71 | Cago, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Apr 2025 |
| 72 | Cal-Mon Oil Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 73 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Apr 2025 |
| 74 | Campana Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 75 | Canan Mowrey Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 76 | Canyon Reef Brine LLC | Snyder, TX 79550 | Oil Operator | Apr 2025 |
| 77 | Carlow Corp. | Midland, TX 79702 | Oil & Gas Operator | Jan 2025 |
| 78 | Carol-Holly Oil Corporation | Denver, CO 80237 | Oil & Gas Operator | Feb 2025 |
| 79 | Carpenter Services | Colorado City, TX 79512 | Oil & Gas Operator | May 1996 |
| 80 | Carr Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Apr 2025 |
| 81 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | Apr 2025 |
| 82 | Cazador Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 83 | Cedar Bend Oil Company | Colorado City, TX 79512 | Oil & Gas Operator | Apr 2025 |
| 84 | Centaur Petroleum Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2025 |
| 85 | Chalk, Otis, Estate | Big Spring, TX 79721 | Oil & Gas Operator | Jan 2006 |
| 86 | Chambers Operating, Inc. | Westbrook, TX 79565 | Oil & Gas Operator | Mar 2006 |
| 87 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Feb 2025 |
| 88 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2024 |
| 89 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 90 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 91 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2025 |
| 92 | Chisum Resources | Shallowater, TX 79363 | Oil Operator | Apr 2025 |
| 93 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Apr 2025 |
| 94 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 95 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 96 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 97 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2025 |
| 98 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 99 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 100 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Apr 2025 |