| 1 | 20TH Century Pipe & Equip.Co.Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 2 | 5H Oil Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 3 | 7S Oil & Gas, LLC | Midland, TX 79706 | Oil & Gas Operator | Dec 2019 |
| 4 | Accidie Exploration And Dev.,Inc | Plano, TX 75023 | Oil & Gas Operator | Feb 2026 |
| 5 | Acoma Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Feb 2026 |
| 6 | Adgo Resources LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2018 |
| 7 | Adventure Exploration PTRS, LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2012 |
| 8 | Aghorn Operating, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Feb 2026 |
| 9 | Aicr LLC | Odessa, TX 79768 | Oil Operator | Feb 2026 |
| 10 | Alleder Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 11 | Alps Oil Company | Odessa, TX 79760 | Oil & Gas Operator | Aug 1999 |
| 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 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 15 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 16 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Dec 2025 |
| 17 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Feb 2026 |
| 18 | Appling, J. B. | Midland, TX 79702 | Oil & Gas Operator | Jul 1997 |
| 19 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Feb 2026 |
| 20 | Arch Oil & Gas, LLC | Ennis, TX 75119 | Oil & Gas Operator | Feb 2026 |
| 21 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 22 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 23 | Aries Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2009 |
| 24 | Aries Operating, LP | Houston, TX 77042 | Oil & Gas Operator | Feb 2026 |
| 25 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 26 | Aspen Operating Company LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Feb 2026 |
| 27 | Associated Operating & Explor. | Dallas, TX 75243 | Oil & Gas Operator | Feb 2026 |
| 28 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 29 | Athlon Holdings LP | Denver, CO 80202 | Oil & Gas Operator | Jan 2015 |
| 30 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 31 | Avad Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 32 | Avighna Energy Inc | Sugar Land, TX 77487 | Oil & Gas Operator | Jan 2019 |
| 33 | Axia Energy II LLC | HGHLNDS Ranch, CO 80129 | Oil & Gas Operator | Jan 2020 |
| 34 | B & B Operating Company | Odessa, TX 79760 | Oil & Gas Operator | Feb 2026 |
| 35 | Badger Oil Company | Midland, TX 79701 | Oil & Gas Operator | Jun 1996 |
| 36 | Baker Operating, Inc. | Odessa, TX 79764 | Oil & Gas Operator | Feb 2026 |
| 37 | Bam Permian Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Feb 2026 |
| 38 | Banam Corporation | Midland, TX 79702 | Oil & Gas Operator | Nov 2013 |
| 39 | Banks, R. C. | Midland, TX 79702 | Oil & Gas Operator | Apr 2016 |
| 40 | Bargo Energy Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 41 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Feb 2026 |
| 42 | Basin Well Service Of Odessa,Inc | Odessa, TX 79768 | Oil & Gas Operator | Feb 2026 |
| 43 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 44 | Baxter, D. B. Inc. | Midland, TX 79708 | Oil & Gas Operator | Feb 2026 |
| 45 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 46 | Baylor Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Feb 2026 |
| 47 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 48 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 49 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2025 |
| 50 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 51 | Bepco, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2008 |
| 52 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 53 | Berry Petroleum Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2014 |
| 54 | Berry, O. H. | Midland, TX 79702 | Oil & Gas Operator | Dec 1993 |
| 55 | Besto Oil & Gas, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Oct 2018 |
| 56 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 57 | Big D Energy Company | New Braunfels, TX 78132 | Oil & Gas Operator | Feb 2026 |
| 58 | Big Star Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2017 |
| 59 | Black Dome Energy Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 60 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Feb 2026 |
| 61 | Blackrock Operating, LLC | Tuscola, TX 79562 | Oil & Gas Operator | Feb 2026 |
| 62 | Blake Oil & Gas Corporation | Midland, TX 79701 | Oil & Gas Operator | May 2004 |
| 63 | Blazer Energy Corp. | Alexandria, VA 22314 | Oil & Gas Operator | Dec 2014 |
| 64 | Bluestem Energy Holdings, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2015 |
| 65 | Boaz Energy II Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 66 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 67 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2025 |
| 68 | BP Prod. Corp. | Richardson, TX 75083 | Oil & Gas Operator | Feb 2026 |
| 69 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2025 |
| 70 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 71 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 72 | Britnic Oil & Gas, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Feb 2026 |
| 73 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 74 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 75 | Brown, H.L. Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 76 | Bta Oil Producers, LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 77 | Bugington Energy, LLC | Odessa, TX 79768 | Oil & Gas Operator | Apr 2018 |
| 78 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 79 | Burleson Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 80 | Burleson, Lewis B. Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2010 |
| 81 | Burlington Res O & G Co-McCamey | Midland, TX 79702 | Oil Operator | Mar 2002 |
| 82 | Burlington Res O & G Co-Midland | Houston, TX 77252 | Oil & Gas Operator | Mar 2020 |
| 83 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Feb 2026 |
| 84 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 85 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 86 | Bustamante Oil Company | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 87 | Byrd Operating Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 88 | Byrne Oil Company | Lubbock, TX 79424 | Oil & Gas Operator | Feb 2026 |
| 89 | Byrne, Robert E. | Lubbock, TX 79416 | Oil & Gas Operator | Jan 2005 |
| 90 | C & F Petroleum, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | May 2013 |
| 91 | C & G Petroleum, Inc. | Imperial, TX 79743 | Oil & Gas Operator | Aug 2004 |
| 92 | Cal-Mon Oil Company | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 93 | Callahan Land Company | Richardson, TX 75081 | Oil & Gas Operator | Sep 2020 |
| 94 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Feb 2026 |
| 95 | Caprock Exploration, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Feb 2026 |
| 96 | Carburante Exploration Co, LTD. | Granbury, TX 76048 | Oil & Gas Operator | Feb 2026 |
| 97 | Cardwell Oil Corporation | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 98 | Casper Oil & Gas | Bandera, TX 78003 | Oil & Gas Operator | Oct 2002 |
| 99 | Celero Energy LP | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 100 | Central Crude Corp. | Wichita, KS 67206 | Oil Operator | Mar 2014 |