| 1 | 3tec Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 2 | 801 LLC | Artesia, NM 88211 | Oil & Gas Operator | Oct 2023 |
| 3 | A A Production Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 1998 |
| 4 | Acoma Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Jul 2025 |
| 5 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 6 | Aikman Brothers, LLC | Amarillo, TX 79109 | Oil & Gas Operator | Apr 2025 |
| 7 | Aikman Oil Corp. | Oklahoma City, OK 73157 | Oil & Gas Operator | Jul 2025 |
| 8 | Alegre Energy Operating, LP | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2005 |
| 9 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Jul 2025 |
| 10 | Allar Co., The | Graham, TX 76450 | Oil & Gas Operator | Dec 2004 |
| 11 | Allegro Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 12 | Alta Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 13 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 14 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 15 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 16 | Amplify Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 17 | Amtex Energy | Midland, TX 79702 | Oil & Gas Operator | Aug 1995 |
| 18 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | May 2025 |
| 19 | Angle Oil Company | Hays, KS 67601 | Oil Operator | Sep 2002 |
| 20 | Antelope Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 21 | Aop Operating Corporation | Dallas, TX 75313 | Oil & Gas Operator | Aug 2003 |
| 22 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 23 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Jul 2025 |
| 24 | Arkland Producing Co Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2023 |
| 25 | Atlantic Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 26 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 27 | B & S Salvage | Post, TX 79356 | Oil & Gas Operator | Jul 2025 |
| 28 | Banam Corporation | Midland, TX 79702 | Oil & Gas Operator | Nov 2013 |
| 29 | Bar D Energy, LLC | Lubbock, TX 79423 | Oil & Gas Operator | Jul 2025 |
| 30 | Bara Corporation | Flower Mound, TX 75027 | Oil & Gas Operator | Apr 2004 |
| 31 | Barrett Brothers Oil & Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2020 |
| 32 | Basin Oil & Gas Operating LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jul 2025 |
| 33 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 34 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 35 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Jul 2025 |
| 36 | Baylor Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2025 |
| 37 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 38 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 39 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 40 | Beach Oil & Gas, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Jul 2025 |
| 41 | Beekay Company | Dallas, TX 75219 | Oil & Gas Operator | Dec 1996 |
| 42 | Bennett, R. C., Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2019 |
| 43 | Berry Oil Comp. | Houston, TX 77002 | Oil & Gas Operator | Jul 2014 |
| 44 | Berry Oil Company, LLC | Bakersfield, CA 93311 | Oil & Gas Operator | Apr 2019 |
| 45 | Berry Petroleum Company LLC | Bakersfield, CA 93311 | Oil & Gas Operator | May 2025 |
| 46 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 47 | Betwell Oil & Gas Company | Hialeah, FL 33002 | Oil & Gas Operator | Jul 2025 |
| 48 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 49 | Big Star Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2017 |
| 50 | Black Arrow Operating, LLC | Dennis, TX 76439 | Oil & Gas Operator | Jul 2025 |
| 51 | Blair, Jack N. | Midland, TX 79702 | Oil & Gas Operator | May 1996 |
| 52 | Blue Ridge Resources, LLC | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 53 | Boaz Energy, LLC | Midland, TX 79710 | Oil & Gas Operator | Mar 2014 |
| 54 | Bold Operating, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | May 2019 |
| 55 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 56 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 57 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 58 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 59 | Brigham Oil & Gas, L.P. | Austin, TX 78730 | Oil & Gas Operator | Oct 2015 |
| 60 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 61 | Bright Hawk Operating Company | Spring, TX 77388 | Oil & Gas Operator | Jul 2025 |
| 62 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 63 | Britnic Oil & Gas, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Jul 2025 |
| 64 | Brooks, E. B., Jr. | Dallas, TX 75206 | Oil & Gas Operator | May 2018 |
| 65 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Jul 2025 |
| 66 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 67 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 68 | Brown, H.L. Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 69 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 70 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 71 | Buchanan, Billy R. | Coahoma, TX 79511 | Oil & Gas Operator | Jul 2025 |
| 72 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2025 |
| 73 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 74 | Burkard Petroleum Company | Houston, TX 77056 | Oil & Gas Operator | May 2003 |
| 75 | Bustamante Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 76 | Butler, Kevin O. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 77 | Butler, Kevin O. & Assoc., Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 78 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 79 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Jul 2025 |
| 80 | Campana Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 81 | Canan Mowrey Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2025 |
| 82 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | May 2025 |
| 83 | Caprock Exploration, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Jul 2025 |
| 84 | Caprock Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Dec 2007 |
| 85 | Cawell Energy, LLC | Spring, TX 77379 | Oil Operator | Jul 2025 |
| 86 | CGS Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2023 |
| 87 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | May 2025 |
| 88 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 89 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Jul 2025 |
| 90 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2025 |
| 91 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 92 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 93 | Chisos Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 94 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Jul 2025 |
| 95 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 96 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 97 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Jul 2025 |
| 98 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Jul 2025 |
| 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 | Jul 2025 |