| 1 | A A Production Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 1998 |
| 2 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 3 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 4 | Alexander Resources, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2026 |
| 5 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 6 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 7 | American Cometra, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2008 |
| 8 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 9 | American National Petroleum Co. | Houston, TX 77057 | Oil & Gas Operator | Aug 1995 |
| 10 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 11 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | May 2026 |
| 12 | Anschutz Exploration Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2026 |
| 13 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | May 2026 |
| 14 | Aratex Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2003 |
| 15 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 16 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 17 | Aviator Energy, LLC | Plano, TX 75093 | Oil Operator | May 2026 |
| 18 | Ballard Exploration Company,Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2026 |
| 19 | Barj Oil Co. | Brownfield, TX 79316 | Oil & Gas Operator | May 2026 |
| 20 | Barrett Brothers Oil & Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2020 |
| 21 | Basin Oil & Gas Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | May 2026 |
| 22 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 23 | Baylor Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | May 2026 |
| 24 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 25 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2026 |
| 26 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2026 |
| 27 | BCP Resources, LLC | Midland, TX 79705 | Oil & Gas Operator | May 2026 |
| 28 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2026 |
| 29 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 30 | Bison Petroleum Corporation | Amarillo, TX 79121 | Oil & Gas Operator | Mar 1996 |
| 31 | Blue Ridge Resources, LLC | Midland, TX 79710 | Oil & Gas Operator | May 2026 |
| 32 | Boaz Energy II Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | May 2026 |
| 33 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | May 2026 |
| 34 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 35 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2026 |
| 36 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 37 | Breitburn Operating LP | Keithville, LA 71047 | Oil & Gas Operator | May 2026 |
| 38 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 39 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2026 |
| 40 | Brigham Oil & Gas, L.P. | Austin, TX 78730 | Oil & Gas Operator | Oct 2015 |
| 41 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 42 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 43 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 44 | Bullin, R. E. Operating Inc. | Levelland, TX 79336 | Oil & Gas Operator | May 2026 |
| 45 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2026 |
| 46 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 47 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | May 2026 |
| 48 | Burns Operating | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2002 |
| 49 | Burns, Bill C. | Midland, TX 79701 | Oil & Gas Operator | Dec 1997 |
| 50 | Byrd Operating Company | Midland, TX 79702 | Oil & Gas Operator | May 2026 |
| 51 | C & F Petroleum, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | May 2013 |
| 52 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | May 2026 |
| 53 | Campana Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | May 2026 |
| 54 | Canan Mowrey Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2026 |
| 55 | Capstone Natural Res II, LLC | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2020 |
| 56 | Capturepoint LLC | Allen, TX 75013 | Oil & Gas Operator | May 2026 |
| 57 | Carlow Corp. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 58 | Catfish Minerals LLC | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 59 | Central Resources, Inc. | Denver, CO 80203 | Oil & Gas Operator | Dec 2019 |
| 60 | Chase Energy, Inc. | Austin, TX 78763 | Oil & Gas Operator | Oct 2001 |
| 61 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 62 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2026 |
| 63 | Chisos Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2026 |
| 64 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | May 2026 |
| 65 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Feb 2026 |
| 66 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | May 2026 |
| 67 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 68 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 69 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 70 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | May 2026 |
| 71 | Collins & Ware, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 72 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 73 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 74 | Cone, S. E. Jr. | Lubbock, TX 79408 | Oil & Gas Operator | Feb 2002 |
| 75 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | May 2026 |
| 76 | Continental Exploration LLC | Richardson, TX 75080 | Oil & Gas Operator | May 2026 |
| 77 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 78 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | May 2026 |
| 79 | Costilla Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 80 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 81 | CR3 Operating Company, L.L.C. | Houston, TX 77251 | Oil & Gas Operator | May 2026 |
| 82 | Crey Oil & Gas LLC | Sundown, TX 79372 | Oil Operator | May 2026 |
| 83 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | May 2026 |
| 84 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 85 | Crossfoot Operating, LLC | Houston, TX 77227 | Oil & Gas Operator | May 2026 |
| 86 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | May 2026 |
| 87 | Denali Exploration, Inc. | Amarillo, TX 79109 | Oil & Gas Operator | Nov 2018 |
| 88 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 89 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2026 |
| 90 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 91 | Diamond S Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | May 2026 |
| 92 | Dimmit County SWD, LLC | Carrizo SPGS, TX 78834 | Oil Operator | May 2026 |
| 93 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | May 2026 |
| 94 | Dominion Operating, LLC | Midland, TX 79708 | Oil Operator | Mar 2018 |
| 95 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Oct 2013 |
| 96 | Double Barrel Oil LLC | Brenham, TX 77834 | Oil & Gas Operator | May 2026 |
| 97 | Duncan Oil Properties, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2026 |
| 98 | Dune Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 1997 |
| 99 | Dunigan Operating Company, Inc. | Austin, TX 78755 | Oil & Gas Operator | May 2026 |
| 100 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |