| 1 | 5H Oil Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 2 | 7S Oil & Gas, LLC | Midland, TX 79706 | Oil & Gas Operator | Dec 2019 |
| 3 | Abaco Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | May 2025 |
| 4 | Abel, M.D. Co. | Lampasas, TX 76550 | Oil & Gas Operator | Jun 2017 |
| 5 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | May 2025 |
| 6 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 7 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 8 | Aggietech Oil, LTD. | Midland, TX 79701 | Oil & Gas Operator | Aug 2016 |
| 9 | Aikman Oil Corp. | Oklahoma City, OK 73157 | Oil & Gas Operator | May 2025 |
| 10 | Ajax Resources, LLC | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 11 | Allar Co., The | Graham, TX 76450 | Oil & Gas Operator | Dec 2004 |
| 12 | Alta Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 13 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 14 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 15 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 16 | American Cometra, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2008 |
| 17 | Amerind Oil Company, LTD. | Midland, TX 79701 | Oil & Gas Operator | Nov 2004 |
| 18 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 19 | Amplify Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 20 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 21 | Antares Energy Company | Houston, TX 77010 | Oil & Gas Operator | May 2025 |
| 22 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 23 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | May 2025 |
| 24 | Aratex Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2003 |
| 25 | Arch Oil & Gas, LLC | Dallas, TX 75254 | Oil & Gas Operator | May 2025 |
| 26 | Arch Petroleum Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2008 |
| 27 | Ard Drilling Company Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2000 |
| 28 | Arden Energy Partners, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2013 |
| 29 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 30 | Aspen Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 31 | Atlas Energy Corporation (Del.) | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2025 |
| 32 | Atropos Exploration Company | Dallas, TX 75225 | Oil & Gas Operator | May 2025 |
| 33 | Avra Oil Co | Dallas, TX 75248 | Oil & Gas Operator | May 2025 |
| 34 | Banam Corporation | Midland, TX 79702 | Oil & Gas Operator | Nov 2013 |
| 35 | Barrett Brothers Oil & Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2020 |
| 36 | Barton Oil Co. | Baird, TX 79504 | Oil Operator | Jun 2004 |
| 37 | Basa Resources, Inc. | Dallas, TX 75254 | Oil & Gas Operator | May 2025 |
| 38 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | May 2025 |
| 39 | Basin Oil & Gas Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | May 2025 |
| 40 | Bass Petroleum Inc | Austin, TX 78716 | Oil & Gas Operator | May 2025 |
| 41 | Baxter, D. B. Inc. | Midland, TX 79708 | Oil & Gas Operator | May 2025 |
| 42 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 43 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 44 | Bayridge Texas Corp. | Big Spring, TX 79720 | Oil & Gas Operator | Jul 2004 |
| 45 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 46 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 47 | BCM Energy Operating LLC | Lafayette, LA 70503 | Oil Operator | Jun 2015 |
| 48 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 49 | Bechtel Energy Resources Corp. | Houston, TX 77210 | Oil & Gas Operator | Jun 1996 |
| 50 | Becker, Clyde M. | Ponca City, OK 74601 | Oil & Gas Operator | Oct 2009 |
| 51 | Bedford Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 52 | Bee-Jay Energy | Whiteface, TX 79379 | Oil & Gas Operator | Nov 1993 |
| 53 | Bee-Jay Petro, Inc. | Levelland, TX 79336 | Oil & Gas Operator | Jun 2024 |
| 54 | Bennett, M. Brad Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2005 |
| 55 | Berry Oil Comp. | Houston, TX 77002 | Oil & Gas Operator | Jul 2014 |
| 56 | Beryl Oil And Gas, LP | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 57 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 58 | Big Star Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2017 |
| 59 | Birch Operations, Inc. | Houston, TX 77010 | Oil & Gas Operator | May 2025 |
| 60 | Black Gold Energy LLC | Jenks, OK 74037 | Oil Operator | Jun 2024 |
| 61 | Black Swan Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2023 |
| 62 | Blair Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 63 | Blair, Jack N. | Midland, TX 79702 | Oil & Gas Operator | May 1996 |
| 64 | Blue Ridge Resources, LLC | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 65 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 66 | Brahaney Drilling Co. | Midland, TX 79702 | Oil & Gas Operator | Feb 2014 |
| 67 | Brahaney Drilling Company, LTD. | Midland, TX 79702 | Oil & Gas Operator | Oct 2015 |
| 68 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 69 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2025 |
| 70 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 71 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 72 | Brigham Oil & Gas, L.P. | Austin, TX 78730 | Oil & Gas Operator | Oct 2015 |
| 73 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 74 | Brooks, E. B., Jr. | Dallas, TX 75206 | Oil & Gas Operator | May 2018 |
| 75 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 76 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 77 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 78 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 79 | Bta Oil Producers, LLC | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 80 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 81 | Burleson Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 82 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 83 | Bustamante Resources LLC | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 84 | Butler, Kevin O. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 85 | Butler, Kevin O. & Assoc., Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 86 | Byrd Operating Company | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 87 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 88 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | May 2025 |
| 89 | Canyon Reef Brine LLC | Snyder, TX 79550 | Oil Operator | May 2025 |
| 90 | Caprock Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Dec 2007 |
| 91 | Carlow Corp. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 92 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | May 2025 |
| 93 | Celero Energy II, LP | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 94 | Celero Energy LP | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 95 | Cfo Resources, Inc. | Corpus Chrsti, TX 78412 | Oil & Gas Operator | May 2025 |
| 96 | CGS Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2023 |
| 97 | Chandler Oil & Gas, LLC | Beeville, TX 78102 | Oil & Gas Operator | May 2025 |
| 98 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 2025 |
| 99 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 100 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |