| 1 | 3-M Energy Corporation | San Angelo, TX 76902 | Oil & Gas Operator | Jun 2017 |
| 2 | 3MB Oil & Gas LLC | Irvine, CA 92616 | Oil & Gas Operator | Apr 2025 |
| 3 | 5H Oil Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 4 | 7S Oil & Gas, LLC | Midland, TX 79706 | Oil & Gas Operator | Dec 2019 |
| 5 | 801 LLC | Artesia, NM 88211 | Oil & Gas Operator | Oct 2023 |
| 6 | Abel, M.D. Co. | Lampasas, TX 76550 | Oil & Gas Operator | Jun 2017 |
| 7 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Jul 2025 |
| 8 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 9 | Acoma Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Jul 2025 |
| 10 | Admiral Permian Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 11 | Adventure Exploration PTRS, LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2012 |
| 12 | Aggietech Oil, LTD. | Midland, TX 79701 | Oil & Gas Operator | Aug 2016 |
| 13 | Alleder Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 14 | Alliance Resources Corporation | Dallas, TX 75367 | Oil & Gas Operator | Nov 2024 |
| 15 | Alpine Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 16 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jul 2025 |
| 17 | Alto Minerals, Inc. | Midland, TX 79708 | Oil & Gas Operator | Apr 2019 |
| 18 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 19 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 20 | American Exploration | Houston, TX 77010 | Gas Operator | Apr 1994 |
| 21 | Amerind Oil Company, LTD. | Midland, TX 79701 | Oil & Gas Operator | Nov 2004 |
| 22 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 23 | Anadarko E&P Company LP | Houston, TX 77251 | Oil & Gas Operator | Aug 2014 |
| 24 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 25 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | May 2025 |
| 26 | Angle Oil Company | Hays, KS 67601 | Oil Operator | Sep 2002 |
| 27 | Anthony, Bob G. Inc. | Brookhaven, MS 39601 | Oil & Gas Operator | Jul 2025 |
| 28 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 29 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Jul 2025 |
| 30 | Arch Petroleum Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2008 |
| 31 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 32 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 33 | Arkland Producing Co Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2023 |
| 34 | Arkland, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 1994 |
| 35 | Aroc (Texas) Inc | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 36 | Ashland Exploration Inc | Houston, TX 77218 | Oil & Gas Operator | Nov 2000 |
| 37 | Aspen Land & Exploration Co | Tulsa, OK 74159-0335 | Oil & Gas Operator | Jul 2001 |
| 38 | Athlon Energy Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2014 |
| 39 | Athlon Fe Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2015 |
| 40 | Athlon Holdings LP | Denver, CO 80202 | Oil & Gas Operator | Jan 2015 |
| 41 | Atinum Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 42 | Atlantic Exploration, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2015 |
| 43 | Atlantic Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 44 | Atlas Energy Corporation (Del.) | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 2025 |
| 45 | Atmos Pipeline - Texas | Dallas, TX 75240 | Oil & Gas Operator | Jul 2025 |
| 46 | Atoka Operating Permian, LLC | Addison, TX 75001 | Oil & Gas Operator | Sep 2023 |
| 47 | Austral Oil Company Incorporated | Sulphur, LA 70663 | Oil & Gas Operator | Mar 2008 |
| 48 | Baker Operating, Inc. | Odessa, TX 79764 | Oil & Gas Operator | Jul 2025 |
| 49 | Bam Permian Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Jul 2025 |
| 50 | Bargo Energy Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 51 | Barron Operating LLC | Midland, TX 79703 | Oil & Gas Operator | Jun 2011 |
| 52 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Jul 2025 |
| 53 | Basin Oil & Gas Operating LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jul 2025 |
| 54 | Baxter, D. B. Inc. | Midland, TX 79708 | Oil & Gas Operator | Jul 2025 |
| 55 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 56 | Baylor Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2025 |
| 57 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 58 | Beach Oil & Gas, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Jul 2025 |
| 59 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 60 | Berry Oil Comp. | Houston, TX 77002 | Oil & Gas Operator | Jul 2014 |
| 61 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 62 | Big Star Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2017 |
| 63 | Birch Operations, Inc. | Houston, TX 77010 | Oil & Gas Operator | Jul 2025 |
| 64 | Black Arrow Operating, LLC | Dennis, TX 76439 | Oil & Gas Operator | Jul 2025 |
| 65 | Black Gold Energy LLC | Jenks, OK 74037 | Oil Operator | Jun 2024 |
| 66 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jul 2025 |
| 67 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2025 |
| 68 | Bluestem Energy Holdings, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2015 |
| 69 | Bold Operating, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | May 2019 |
| 70 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 71 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 72 | Brahaney Drilling Co. | Midland, TX 79702 | Oil & Gas Operator | Feb 2014 |
| 73 | Brahaney Drilling Company, LTD. | Midland, TX 79702 | Oil & Gas Operator | Oct 2015 |
| 74 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 75 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 76 | Brock Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2019 |
| 77 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Jul 2025 |
| 78 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 79 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 80 | Bta Oil Producers, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 81 | Buckeye Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2018 |
| 82 | Burgundy Oil & Gas, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 83 | Burleson Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 84 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 85 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 86 | Bustamante Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 87 | Bustamante Resources LLC | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 88 | Butler, Kevin O. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 89 | Byrd Operating Company | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 90 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 91 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Jul 2025 |
| 92 | Camterra Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Jul 2025 |
| 93 | Candelero Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 94 | Canyon Reef Brine LLC | Snyder, TX 79550 | Oil Operator | Jul 2025 |
| 95 | Carlow Corp. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 96 | Carson Buckles Exploration LLC | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 97 | Catoilan Corporation | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 98 | Caza Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 99 | Centerfire Resources | Springerville, AZ 85938 | Oil & Gas Operator | Jul 2025 |
| 100 | Central Resources Inc | Denver, CO 80203 | Oil & Gas Operator | Dec 2019 |