| 1 | 4D Energy Co. | Sterling City, TX 76951 | Oil & Gas Operator | Feb 2007 |
| 2 | A.E.N. Energy | Abilene, TX 79608 | Oil & Gas Operator | Feb 2005 |
| 3 | A.E.N. Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jan 1996 |
| 4 | Abernathy Exploration Company | Abilene, TX 79608 | Oil & Gas Operator | Mar 2002 |
| 5 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2025 |
| 6 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 7 | Adams Branch Exploration Company | Abilene, TX 79608 | Oil & Gas Operator | Jul 2002 |
| 8 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 9 | Aethon I LP | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 10 | Alaron Energy, Inc. | Irving, TX 75038 | Oil & Gas Operator | Apr 2025 |
| 11 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2025 |
| 12 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 13 | Alexander Resources, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 14 | Allison Lease Services LLC | San Angelo, TX 76904 | Oil & Gas Operator | Apr 2025 |
| 15 | Amerac Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2013 |
| 16 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 17 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Feb 2025 |
| 18 | Anderson, James K. Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 19 | Apex Royalties, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 1997 |
| 20 | Argent Petroleum Corporation | Center, TX 75935 | Oil & Gas Operator | Apr 2025 |
| 21 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 22 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2025 |
| 23 | Avra Oil Co | Dallas, TX 75248 | Oil & Gas Operator | Apr 2025 |
| 24 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Apr 2025 |
| 25 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 26 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 27 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 28 | Benson & Schoen Oil Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Apr 2012 |
| 29 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 30 | Bitz, M. J. Company | Fort Worth, TX 76116 | Oil & Gas Operator | Aug 2003 |
| 31 | BKM Production | Gainesville, TX 76240 | Oil & Gas Operator | Apr 2025 |
| 32 | Blue Ridge Resources, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 33 | Boaz Energy II Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 34 | Boaz Energy, LLC | Midland, TX 79710 | Oil & Gas Operator | Mar 2014 |
| 35 | Bob Hughes Oil Company, LLC | San Angelo, TX 76901 | Oil & Gas Operator | Apr 2025 |
| 36 | Bomar Operating Co., LC | Bellaire, TX 77401 | Oil & Gas Operator | Apr 2025 |
| 37 | BP Prod. Corp. | Richardson, TX 75083 | Oil & Gas Operator | Apr 2025 |
| 38 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2025 |
| 39 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 40 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2025 |
| 41 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 42 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 43 | Brown, H.L. Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 44 | Brown, J. Burns Operating Co. | Havre, MT 59501 | Oil & Gas Operator | Jan 2025 |
| 45 | Burgess, W. E. | Fort Worth, TX 76147 | Oil & Gas Operator | Apr 2025 |
| 46 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 47 | Bustamante Oil Company | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 48 | Bustamante Resources LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 49 | Byrd Operating Company | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 50 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2025 |
| 51 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Apr 2025 |
| 52 | Campana Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 53 | Caraway Operating Co. | San Angelo, TX 76902 | Oil & Gas Operator | Apr 2025 |
| 54 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | Apr 2025 |
| 55 | Cedar Oil Company | Midland, TX 79707 | Oil & Gas Operator | Apr 2025 |
| 56 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 57 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2025 |
| 58 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 59 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2025 |
| 60 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Apr 2025 |
| 61 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 62 | Circle W Operating, Inc. | Mertzon, TX 76941 | Oil & Gas Operator | Apr 2025 |
| 63 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Apr 2025 |
| 64 | Clear Brooke Ranches, LLC | Fort Worth, TX 76179 | Oil & Gas Operator | Apr 2025 |
| 65 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 66 | Clearly Petroleum, LLC | Houston, TX 77086 | Oil & Gas Operator | Jun 2020 |
| 67 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Apr 2025 |
| 68 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 69 | Colo Exploration Company, Inc. | Benbrook, TX 76126 | Oil & Gas Operator | Apr 2025 |
| 70 | Compass Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 71 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 72 | Conquest Oil Company | Big Spring, TX 79721 | Oil & Gas Operator | Aug 2024 |
| 73 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 74 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 75 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 76 | Crestridge DRLG. & Prod.Co.,LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2023 |
| 77 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2024 |
| 78 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 79 | Cso Consulting | Bridgeport, TX 76426 | Oil & Gas Operator | Mar 2020 |
| 80 | D&S Oil And Gas Properties | San Angelo, TX 76902 | Oil & Gas Operator | Apr 2025 |
| 81 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Apr 2025 |
| 82 | DDC Energy Corporation | Marietta, GA 30068 | Oil & Gas Operator | Mar 1997 |
| 83 | Delray Oil, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2025 |
| 84 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 85 | Diamondback E&P LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 86 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 87 | Dove Drilling, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 1997 |
| 88 | Draco Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 89 | Drennan Oil L.L.C. | Ballinger, TX 76821 | Oil & Gas Operator | Apr 2025 |
| 90 | Drilmor, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 1998 |
| 91 | Dunigan Petroleum, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 92 | Dyad Petroleum Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2021 |
| 93 | E & R Oil | San Angelo, TX 76906 | Oil & Gas Operator | Apr 2025 |
| 94 | Edco Petroleum, Inc. | Dallas, TX 75202 | Oil & Gas Operator | Mar 2005 |
| 95 | Edwards Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 96 | Encore Energy, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 97 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 98 | Energy Onramp LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 99 | Energy Transfer Crude Marketing LLC | Houston, TX 77002 | Oil Operator | Jan 2025 |
| 100 | Energyquest Management, LLC | Houston, TX 77090 | Oil & Gas Operator | Apr 2021 |