| 1 | 3R Oil Corporation | Healdton, OK 73438-0306 | Oil Operator | Apr 2022 |
| 2 | 4D'S Operating Co LLC (The) | Ratliff City, OK 73481 | Oil & Gas Operator | Mar 2025 |
| 3 | 7C Land & Minerals Co | Ada, OK 74820 | Oil & Gas Operator | Mar 2025 |
| 4 | 89 Energy LLC | Oklahoma City, OK 73102-4832 | Oil & Gas Operator | Jun 2022 |
| 5 | A & A Oil Company | Luling, TX 78648 | Oil & Gas Operator | Oct 2009 |
| 6 | A & A Tank Truck Company | Norman, OK 73070-8969 | Oil & Gas Operator | Mar 2025 |
| 7 | Abarr Trust (The) | Oklahoma City, OK 73179 | Oil & Gas Operator | Mar 2025 |
| 8 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | May 2025 |
| 9 | Action Petroleum Service Corp | Ardmore, OK 73401 | Oil Operator | Jan 2025 |
| 10 | Adams Resources Expl. Corp. | Houston, TX 77001 | Oil & Gas Operator | Apr 2020 |
| 11 | Adobe Oil & Gas Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 1993 |
| 12 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 13 | Afo LLC | Velma, OK 73491 | Oil & Gas Operator | Dec 2024 |
| 14 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 15 | Alexander Oil Co. | Loco, OK 73442-9409 | Oil & Gas Operator | Mar 2025 |
| 16 | Allen Oil & Gas LLC | Ardmore, OK 73401 | Oil Operator | Aug 2022 |
| 17 | Alligator Rock Well Service LLC | Loco, OK 73442 | Oil & Gas Operator | Mar 2025 |
| 18 | Almont Energy LLC | Kingfisher, OK 73750-0901 | Oil & Gas Operator | Oct 2021 |
| 19 | Alpine Inc | Oklahoma City, OK 73134-2504 | Oil & Gas Operator | Feb 2024 |
| 20 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 21 | Amerac Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2013 |
| 22 | American Natural Energy Corp | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2025 |
| 23 | American Petroleum Corp | Addison, TX 75001 | Oil & Gas Operator | May 2025 |
| 24 | An-Son Corporation | Oklahoma City, OK 73124 | Oil & Gas Operator | Jan 2006 |
| 25 | Anadarko Basin Oil& Gas Lease Inc | Sayre, OK 73662 | Oil & Gas Operator | Jan 1997 |
| 26 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 27 | Anadarko Minerals Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 28 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Mar 2025 |
| 29 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 30 | Anson Company | Oklahoma City, OK 73124 | Oil & Gas Operator | Apr 2018 |
| 31 | Antara Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 2004 |
| 32 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 33 | Apache Energy Resources Corp | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 34 | Apache PHN North America, Inc. | | Oil & Gas Operator | Mar 2005 |
| 35 | Apc Operating Partnership LP | Tulsa, OK 74136-4224 | Oil & Gas Operator | Jun 2015 |
| 36 | Aquanyx Midstream LLC | Oklahoma City, OK 73131 | Oil Operator | Mar 2025 |
| 37 | Arbuckle Enterprises, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Feb 2025 |
| 38 | Arcadia Oil Company | Edmond, OK 73013-9009 | Oil & Gas Operator | Oct 2015 |
| 39 | Arch Oil & Gas, LLC | Dallas, TX 75254 | Oil & Gas Operator | May 2025 |
| 40 | Arcotex Oil & Gas Inc | Gainesville, TX 76241-1357 | Oil & Gas Operator | Mar 2025 |
| 41 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 42 | Armstrong & McLeod Company | Okmulgee, OK 74447-0819 | Oil & Gas Operator | Dec 1993 |
| 43 | Arnold Oil Properties, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2019 |
| 44 | Arnold Oil Properties, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | May 2025 |
| 45 | Arrow Energy, Incorporated | Houston, TX 77008 | Oil & Gas Operator | Mar 2025 |
| 46 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 47 | Astro Corporation | Tulsa, OK 74145 | Oil & Gas Operator | Apr 2007 |
| 48 | Atkinson WM H Estate | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2001 |
| 49 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 50 | Avalanche Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | May 2025 |
| 51 | Avalon Exploration Inc | Tulsa, OK 74119-5401 | Oil & Gas Operator | Dec 2019 |
| 52 | Aycox Robert D | Healdton, OK 73438 | Oil Operator | Sep 2022 |
| 53 | B & B Tool Company Inc | Lindsay, OK 73052 | Oil & Gas Operator | Feb 2025 |
| 54 | B & H Oil Co. | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2025 |
| 55 | B & W Operating, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Mar 2025 |
| 56 | Balco Energy Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2025 |
| 57 | Banner Oil & Gas LLC | Oklahoma City, OK 73159 | Oil & Gas Operator | Feb 2025 |
| 58 | Barbour Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | May 2025 |
| 59 | Bargo Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2014 |
| 60 | Barnes Producing Company LLC | Ardmore, OK 73401-8882 | Oil Operator | Feb 2025 |
| 61 | Barta Enterprises | Oklahoma City, OK 73162-1728 | Oil & Gas Operator | Feb 2025 |
| 62 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | May 2025 |
| 63 | Basin Operating Services LLC | Oklahoma City, OK 73106-5615 | Oil & Gas Operator | Feb 2025 |
| 64 | Bayou Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jan 2015 |
| 65 | Bays Exploration Inc | Oklahoma City, OK 73116-9004 | Oil & Gas Operator | Mar 2025 |
| 66 | Bce-Mach II LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 67 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 68 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2025 |
| 69 | BD Operating LLC | Artesia, NM 88210 | Oil & Gas Operator | Mar 2025 |
| 70 | Beach Operating Company | Tulsa, OK 74136-5577 | Oil & Gas Operator | Mar 2013 |
| 71 | Beard Oil Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2013 |
| 72 | Becker Oil Corporation | Ponca City, OK 74602 | Oil & Gas Operator | Feb 2025 |
| 73 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 74 | Bell & Kinley Company LLC | Piedmont, OK 73078-8918 | Oil & Gas Operator | Jul 2021 |
| 75 | Below Ground Level LLC | Sand Springs, OK 74063 | Oil & Gas Operator | May 2025 |
| 76 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Apr 2025 |
| 77 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | May 2025 |
| 78 | Bestmark Production Inc | Yukon, OK 73099 | Oil & Gas Operator | Mar 2011 |
| 79 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 80 | Biffle SR Bob | Duncan, OK 73533 | Oil & Gas Operator | Nov 1998 |
| 81 | Big Four Petroleum Company | Cushing, OK 74023 | Oil & Gas Operator | Nov 2004 |
| 82 | Billy Judd Investment Company | Ardmore, OK 73401-1095 | Oil & Gas Operator | Feb 2025 |
| 83 | Bingman Lois Lemons | Healdton, OK 73438-0328 | Oil Operator | Sep 1996 |
| 84 | Black Mesa Energy LLC | Tulsa, OK 74103-4334 | Oil & Gas Operator | Feb 2025 |
| 85 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2025 |
| 86 | Blakemore Oil & Gas In Okla | Allen, TX 75002-5008 | Oil Operator | Aug 2013 |
| 87 | Blue Cedar Energy LLC | Edmond, OK 73013 | Oil & Gas Operator | Mar 2025 |
| 88 | Blue Dolphin Production LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2025 |
| 89 | Blue Star Energy, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | May 2025 |
| 90 | Bluebonnet Oil LLC | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Mar 2025 |
| 91 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | Jan 2025 |
| 92 | Bo-MC Operating Corporation | Enid, OK 73702-1765 | Oil & Gas Operator | Mar 2018 |
| 93 | Bo-MC Resources Corporation | Enid, OK 73702-1765 | Oil & Gas Operator | Apr 2005 |
| 94 | Bogo Energy Corporation | Oklahoma City, OK 73134-1002 | Oil & Gas Operator | Mar 2025 |
| 95 | Bolin R L Properties LP | Wichita Falls, TX 76308-2829 | Oil & Gas Operator | Sep 2024 |
| 96 | Bomber Energy LLC | Comanche, OK 73529 | Oil & Gas Operator | Feb 2025 |
| 97 | Borinquen Oil Company | Tussy, OK 73088 | Oil Operator | Nov 2001 |
| 98 | Boswell Energy Corp. | Oklahoma City, OK 73114-7401 | Oil & Gas Operator | Nov 2004 |
| 99 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 100 | BP Explorationinc/Ofb See #17756 | | Oil & Gas Operator | Apr 2015 |