| 1 | 3 $ Oil Company | Lubbock, TX 79413 | Oil Operator | Dec 1997 |
| 2 | 3 S Production, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Jul 2025 |
| 3 | A.D. Operating | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 4 | A.E.N. Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jan 1996 |
| 5 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Jul 2025 |
| 6 | Acock/Anaqua Operating Co., LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2025 |
| 7 | Acoma Oil Corporation | Saint Paul, MN 55102 | Oil & Gas Operator | Jul 2025 |
| 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 | Jul 2025 |
| 11 | Alda Oil & Gas Corporation | Nichols Hill, OK 73116 | Oil & Gas Operator | Jan 2004 |
| 12 | Alegre Energy Operating, LP | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2005 |
| 13 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Jul 2025 |
| 14 | Alexander Resources, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 15 | Allar Co., The | Graham, TX 76450 | Oil & Gas Operator | Dec 2004 |
| 16 | Allegro Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 17 | Alpha Exploration Co. | Wichita Falls, TX 76309 | Oil & Gas Operator | Oct 1998 |
| 18 | Alumni Oil LLC | Plano, TX 75024 | Oil Operator | Jul 2025 |
| 19 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 20 | Amerac Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2013 |
| 21 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 22 | American Cascade Energy, Inc. | Barker, TX 77413 | Oil & Gas Operator | Jul 2025 |
| 23 | American Cometra, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2008 |
| 24 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 25 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 26 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | Jul 2025 |
| 27 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | May 2025 |
| 28 | Anathema, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Dec 1994 |
| 29 | Andalucia Oil Company | San Antonio, TX 78258 | Oil Operator | Jul 2025 |
| 30 | Anderson, James K. Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 31 | Angle Oil Company | Hays, KS 67601 | Oil Operator | Sep 2002 |
| 32 | Antle Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 33 | Apex Royalties, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 1997 |
| 34 | Arabella Petroleum Company, LLC | Austin, TX 78701 | Oil & Gas Operator | Jul 2025 |
| 35 | Arcadian Resources LLC | Glen Elder, KS 67446 | Oil & Gas Operator | Jul 2025 |
| 36 | Aspen Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 37 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 38 | Atasca Resources Inc | Houston, TX 77219 | Oil & Gas Operator | Jul 2025 |
| 39 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 40 | Atmos Pipeline - Texas | Dallas, TX 75240 | Oil & Gas Operator | Jul 2025 |
| 41 | Atropos Exploration Company | Dallas, TX 75225 | Oil & Gas Operator | Jul 2025 |
| 42 | Avad Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 43 | Avery Oil & Gas, L.P. | Buena VIsta, CO 81211 | Gas Operator | Dec 2006 |
| 44 | Avery, Irving W. | Buena VIsta, CO 81211 | Oil & Gas Operator | Mar 2008 |
| 45 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Jul 2025 |
| 46 | B-Jaks Oil Production | Lubbock, TX 79413 | Oil Operator | Mar 2008 |
| 47 | Baber, Bill M. | Petrolia, TX 76377 | Oil & Gas Operator | Jul 2025 |
| 48 | Baron Energy Inc. | San Marcos, TX 78666 | Oil & Gas Operator | Jul 2025 |
| 49 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Jul 2025 |
| 50 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 51 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 52 | Bayou Operating Company, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 53 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 54 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 55 | Beard Oil Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2013 |
| 56 | Beene, Tommy H. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2005 |
| 57 | Bell, Johnny Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 58 | Bell, O. M. | Merkel, TX 79536 | Oil & Gas Operator | Mar 2008 |
| 59 | Bendorf Services & Supply Co | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2000 |
| 60 | Benson & Schoen Oil Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Apr 2012 |
| 61 | Bent Oak Energy Interests, LLC | Houston, TX 77024 | Oil Operator | Oct 2014 |
| 62 | Bentley Oil & Gas Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 63 | Best Petroleum Explorations,Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 2025 |
| 64 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 65 | Betwell Oil & Gas Company | Hialeah, FL 33002 | Oil & Gas Operator | Jul 2025 |
| 66 | Bex, Inc. | Nashville, TN 37209 | Oil & Gas Operator | Aug 2007 |
| 67 | Big Shell Oil & Gas, Inc. | Taft, TX 78390 | Oil & Gas Operator | Jul 2025 |
| 68 | Bloomer & Associates, Inc. | Lago VIsta, TX 78645 | Oil & Gas Operator | Jul 2002 |
| 69 | Blue Ridge Resources, LLC | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 70 | Bo Dunagin Operating, LLC | Merkel, TX 79536 | Oil Operator | Mar 2019 |
| 71 | Boaz Energy II Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 72 | Boundary Ventures, Inc. | Columbus, TX 78934 | Oil Operator | Jul 2025 |
| 73 | Bowles Energy, Inc. | Longview, TX 75601 | Oil & Gas Operator | Jul 2025 |
| 74 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 75 | Braman, D. H., Jr. | Victoria, TX 77901 | Oil & Gas Operator | Dec 2008 |
| 76 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 77 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 78 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 79 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 80 | Brittany Drilling Co. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2000 |
| 81 | Brothers Operating Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Jul 2025 |
| 82 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Jul 2025 |
| 83 | Brower Oil & Gas Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 84 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 85 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 86 | BRP Energy, LLC | San Angelo, TX 76902 | Oil & Gas Operator | Jul 2025 |
| 87 | Burger, F.W. Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 88 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 89 | Burns Operating | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2002 |
| 90 | Bustamante Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 91 | Bustamante Resources LLC | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 92 | C & G Transports, Inc. | Woodson, TX 76491 | Oil & Gas Operator | Jul 2025 |
| 93 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 94 | Caddo Corporation | Austin, TX 78731 | Oil & Gas Operator | Jul 2025 |
| 95 | Campana Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 96 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 97 | Caraway Operating Co. | San Angelo, TX 76902 | Oil & Gas Operator | Jul 2025 |
| 98 | Cardwell Oil Corporation | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 99 | Carey, Shirley L. Trust | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 100 | Carl Oil & Gas Co. | Bakersfield, CA 93309 | Oil & Gas Operator | Dec 1995 |