| 1 | 1836 Energy LLC | El Campo, TX 77437 | Oil Operator | Apr 2026 |
| 2 | 3tec Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 3 | 7S Oil & Gas, LLC | Midland, TX 79706 | Oil & Gas Operator | Dec 2019 |
| 4 | Active Iron Energy, LLC | Plano, TX 75093 | Oil & Gas Operator | Apr 2026 |
| 5 | Adventure Operating Company, LLC | Midland, TX 79702 | Oil & Gas Operator | Jan 2021 |
| 6 | Aeg Operating, LLC | Austin, TX 78746 | Oil Operator | Jun 2012 |
| 7 | Aghorn Operating, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Apr 2026 |
| 8 | Ajax Resources, LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 9 | Alegre Energy Operating, LP | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2005 |
| 10 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2026 |
| 11 | Alpine Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 12 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 13 | Amax Oil & Gas Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 14 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 15 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 16 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 17 | American Star Energy & Min. Corp | Katy, TX 77449 | Oil & Gas Operator | Apr 2026 |
| 18 | Amerind Oil Company, LTD. | Midland, TX 79701 | Oil & Gas Operator | Nov 2004 |
| 19 | Amirmex Inc. | Northglenn, CO 80234 | Oil & Gas Operator | Apr 2026 |
| 20 | Ammonite Energy Texas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Aug 2003 |
| 21 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 22 | Amtex Energy, Inc. | Fort Worth, TX 76147 | Oil & Gas Operator | Apr 2026 |
| 23 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 24 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Feb 2026 |
| 25 | Anschutz Exploration Corporation | Denver, CO 80202 | Oil & Gas Operator | Apr 2026 |
| 26 | Antelope Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 27 | Antelope Production Co. | Midland, TX 79701 | Oil & Gas Operator | Oct 1995 |
| 28 | Anthony, Bob G. Inc. | Brookhaven, MS 39601 | Oil & Gas Operator | Apr 2026 |
| 29 | Aoco Operating Company, L.L.C. | Houston, TX 77008 | Oil & Gas Operator | Feb 2005 |
| 30 | Aoco Operating, L.P. | Houston, TX 77008 | Oil & Gas Operator | Mar 2008 |
| 31 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Apr 2026 |
| 32 | Apache Energy Resources Corp. | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 33 | Apex Royalties, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 1997 |
| 34 | Arch Oil & Gas, LLC | Ennis, TX 75119 | Oil & Gas Operator | Apr 2026 |
| 35 | Arch Petroleum Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2008 |
| 36 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 37 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 38 | Ard Drilling Company Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2000 |
| 39 | Ares Energy, LTD. | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 40 | Aries Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2009 |
| 41 | Aries Operating, LP | Houston, TX 77042 | Oil & Gas Operator | Apr 2026 |
| 42 | Aroc (Texas) Inc. | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 43 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 44 | Aspen Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 45 | Aspen Operating Company LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2026 |
| 46 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 47 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2026 |
| 48 | Aviara Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2002 |
| 49 | Aviator Energy, LLC | Plano, TX 75093 | Oil Operator | Apr 2026 |
| 50 | Avra Oil Co | Dallas, TX 75248 | Oil & Gas Operator | Apr 2026 |
| 51 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Apr 2026 |
| 52 | B & W Southern Petroleum | The Woodlands, TX 77381 | Oil & Gas Operator | Aug 2009 |
| 53 | B. W. P., Inc. | Diboll, TX 75941 | Oil & Gas Operator | Mar 2015 |
| 54 | B.A.R. Treating Service, Inc. | Austin, TX 78746 | Oil & Gas Operator | Apr 2026 |
| 55 | Baber Well Servicing Co. | Hobbs, NM 88240 | Oil & Gas Operator | May 1995 |
| 56 | Bald Eagle Operating Inc. | Midland, TX 79707 | Oil & Gas Operator | Apr 2026 |
| 57 | Bam Permian Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Apr 2026 |
| 58 | Banam Corporation | Midland, TX 79702 | Oil & Gas Operator | Nov 2013 |
| 59 | Banding M R Inc | Gillette, WY 82717 | Oil & Gas Operator | Feb 2026 |
| 60 | Bargo Energy Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 61 | Barnett Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 62 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Apr 2026 |
| 63 | Basin Oil & Gas Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2026 |
| 64 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 65 | Baylor Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2026 |
| 66 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 67 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2026 |
| 68 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2026 |
| 69 | BCP Resources, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2026 |
| 70 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 71 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2026 |
| 72 | Beekay Company | Dallas, TX 75219 | Oil & Gas Operator | Dec 1996 |
| 73 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 74 | Bepco, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2008 |
| 75 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 76 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 77 | Big Al Oil And Gas | Abilene, TX 79608 | Oil & Gas Operator | Apr 2026 |
| 78 | Big D Energy Company | New Braunfels, TX 78132 | Oil & Gas Operator | Apr 2026 |
| 79 | Big Mountain Operating LLC | Decatur, TX 76234 | Oil & Gas Operator | Apr 2026 |
| 80 | Big Run Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 81 | Black Arrow Operating, LLC | Dennis, TX 76439 | Oil & Gas Operator | Apr 2026 |
| 82 | Black Bayou Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2025 |
| 83 | Black Resources, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Mar 2008 |
| 84 | Black Sheep Oil & Gas LLC | Odessa, TX 79768 | Oil & Gas Operator | Apr 2026 |
| 85 | Blackrock Operating, LLC | Tuscola, TX 79562 | Oil & Gas Operator | Apr 2026 |
| 86 | Blair, Jack N. | Midland, TX 79702 | Oil & Gas Operator | May 1996 |
| 87 | Blanco Oil Co. | San Antonio, TX 78230 | Oil & Gas Operator | Feb 2004 |
| 88 | Block "T" Petroleum, Inc. | Tyler, TX 75707 | Oil & Gas Operator | Apr 2026 |
| 89 | Blue Ridge Resources, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2026 |
| 90 | Bold Operating, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | May 2019 |
| 91 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 92 | Bowman, Fred Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2014 |
| 93 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 94 | Boyd, D. K. Oil And Gas Co.,Inc. | Midland, TX 79703 | Oil & Gas Operator | Apr 2026 |
| 95 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 96 | Brady, W. Production, Inc. | Midland, TX 79708 | Oil & Gas Operator | Apr 2026 |
| 97 | Brahaney Drilling Co. | Midland, TX 79702 | Oil & Gas Operator | Feb 2014 |
| 98 | Brahaney Drilling Company, LTD. | Midland, TX 79702 | Oil & Gas Operator | Oct 2015 |
| 99 | Bravo Operating Company | Hobbs, NM 88241 | Oil & Gas Operator | Dec 1995 |
| 100 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |