| 1 | A & A Tank Truck Company | Norman, OK 73070-8969 | Oil & Gas Operator | May 2026 |
| 2 | A & H Disposal Inc | Lindsay, OK 73052-0456 | Oil & Gas Operator | Jul 2019 |
| 3 | A H & L Operating Company Inc | Norman, OK 73070-4084 | Oil & Gas Operator | Apr 2015 |
| 4 | Abps Energy Inc | Chickasha, OK 73023-1658 | Oil & Gas Operator | Apr 2015 |
| 5 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Jul 2026 |
| 6 | Abundance Energy Services LLC | Tulsa, OK 74114 | Gas Operator | May 2026 |
| 7 | Adams Evertte | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 8 | Adams Res & Energy Co | Houston, TX 77001-0844 | Oil & Gas Operator | Mar 2015 |
| 9 | Adams Resources Expl. Corp. | Houston, TX 77001 | Oil & Gas Operator | Apr 2020 |
| 10 | Adobe Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Aug 2002 |
| 11 | Aethon I LP | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 12 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | May 2026 |
| 13 | Alda Oil & Gas Corporation | Nichols Hill, OK 73116 | Oil & Gas Operator | Jan 2004 |
| 14 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 15 | Alford Oil Corporation | Spring, TX 77379 | Oil & Gas Operator | May 2006 |
| 16 | Almont Energy LLC | Kingfisher, OK 73750-0901 | Oil & Gas Operator | Oct 2021 |
| 17 | Alvarado 2014 LLC | Houston, TX 77027 | Oil & Gas Operator | Jul 2026 |
| 18 | Am Oil Company | Cyril, OK 73029 | Oil & Gas Operator | Mar 2026 |
| 19 | Amax Oil & Gas Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 20 | American Petroleum & Environmental Consultants Inc | Edmond, OK 73013-8801 | Oil & Gas Operator | Apr 2026 |
| 21 | American Petroleum Corp | Addison, TX 75001 | Oil & Gas Operator | Jul 2026 |
| 22 | American Quasar Petroleum Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2014 |
| 23 | American Trading & Prod Corp | Houston, TX 77040-6471 | Oil & Gas Operator | Nov 2014 |
| 24 | An-Son Corp | Oklahoma City, OK 73124 | Oil & Gas Operator | Jan 2006 |
| 25 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Jul 2026 |
| 26 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | May 2026 |
| 27 | Anco Account | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 1995 |
| 28 | Anderson Oil & Gas Account | Wichita Falls, TX 76301 | Oil & Gas Operator | Nov 2013 |
| 29 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 30 | Anson Charles Dba Anson Oil | Seminole, OK 74868 | Oil Operator | Apr 2026 |
| 31 | Anson Company | Oklahoma City, OK 73124 | Oil & Gas Operator | Apr 2018 |
| 32 | Antioch Operating LLC | Dallas, TX 75206 | Oil & Gas Operator | May 2026 |
| 33 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Jul 2026 |
| 34 | Apache Energy Resources Corp. | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 35 | Apc Operating Partnership LP | Tulsa, OK 74136-4224 | Oil & Gas Operator | Jun 2015 |
| 36 | Apexco, Inc. | Sand Springs, OK 74063 | Oil & Gas Operator | Oct 2025 |
| 37 | Aquila Energy Resources Corp. | Houston, TX 77042 | Oil & Gas Operator | Nov 2013 |
| 38 | Arapahoe Resources LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2026 |
| 39 | Arbuckle Enterprises Inc | Edmond, OK 73083 | Oil & Gas Operator | Apr 2026 |
| 40 | Archibald Oil & Gas Operating Inc | Ada, OK 74820 | Oil & Gas Operator | Apr 2026 |
| 41 | Aries Operating, LP | Houston, TX 77042 | Oil & Gas Operator | Jul 2026 |
| 42 | Arkla Energy Resources | Shreveport, LA 71151 | Oil & Gas Operator | Mar 2015 |
| 43 | Arkoma Operations LLC | Tulsa, OK 74114-3502 | Oil & Gas Operator | Apr 2026 |
| 44 | Arkoma Resources LLC | Henryetta, OK 74437 | Oil & Gas Operator | May 2026 |
| 45 | Arnold Oil Properties, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2019 |
| 46 | Arrow Energy, Incorporated | Houston, TX 77008 | Oil & Gas Operator | May 2026 |
| 47 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Jul 2026 |
| 48 | Arvine Pipe & Supply Co Inc | Norman, OK 73069-8224 | Oil & Gas Operator | Jul 2015 |
| 49 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 50 | Associated Oil Properties | Agoura Hills, CA 91376 | Oil Operator | Nov 2020 |
| 51 | Atchley Resources, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2026 |
| 52 | Athena Energy, Inc. | Gallatin, TN 37066 | Oil & Gas Operator | Jul 2026 |
| 53 | Atlantic Richfield Company | Houston, TX 77079 | Oil & Gas Operator | Dec 2016 |
| 54 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2026 |
| 55 | Atls Production Company LLC | Fort Worth, TX 76102-7426 | Gas Operator | Sep 2020 |
| 56 | Atwell, David L. | Duncan, OK 73533 | Oil & Gas Operator | Jul 2003 |
| 57 | Avalanche Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jul 2026 |
| 58 | Avalon Exploration Inc | Tulsa, OK 74119-5401 | Oil & Gas Operator | Dec 2019 |
| 59 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Jul 2026 |