| 1 | A & A Tank Truck Company | Norman, OK 73070-8969 | Oil & Gas Operator | Mar 2024 |
| 2 | A & T Oil Company | Midland, TX 79707 | Oil & Gas Operator | Sep 2008 |
| 3 | A & W Operating Inc | Drumright, OK 74030-5789 | Oil & Gas Operator | Mar 2015 |
| 4 | A J Oil And Gas | Oilton, OK 74052-0112 | Oil & Gas Operator | Jun 2012 |
| 5 | A R W Exploration Corp | Stillwater, OK 74076 | Oil & Gas Operator | May 2013 |
| 6 | ABC Oil Co. | Wichita Falls, TX 76307-1469 | Oil & Gas Operator | Oct 2023 |
| 7 | Ablaze Drilling Company | Garland, TX 75044-2912 | Oil & Gas Operator | Aug 2013 |
| 8 | Ajb Oil LLC | | Oil Operator | Feb 2024 |
| 9 | Allen Michael | Broken Arrow, OK 74014-2239 | Oil & Gas Operator | Dec 2023 |
| 10 | Allied Operating LLC | Bowling Green, KY 42101-3980 | Oil & Gas Operator | Sep 2015 |
| 11 | Allison Energy Holdings LLC | | Oil Operator | Mar 2024 |
| 12 | Almac Engineering | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2007 |
| 13 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | May 2024 |
| 14 | Ambrit Energy Corporation | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 15 | American Energy Recovery Inc | Oklahoma City, OK 73123-0549 | Oil & Gas Operator | Aug 2017 |
| 16 | American Petroleum Corp | Addison, TX 75001 | Oil & Gas Operator | May 2024 |
| 17 | Amvest Osage Inc | Skiatook, OK 74070-0970 | Oil & Gas Operator | Feb 2024 |
| 18 | Anderson T Maxwell | Tulsa, OK 74136-0653 | Oil & Gas Operator | Dec 2013 |
| 19 | Anstine & Musgrove Inc | Ponca City, OK 74602 | Oil & Gas Operator | Feb 2024 |
| 20 | Aog Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 21 | Apache Energy Resources Corp | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 22 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | May 2024 |
| 23 | Aruba Petroleum, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Dec 2023 |
| 24 | Ashlock Thomas J | Skiatook, OK 74070 | Oil & Gas Operator | Aug 2015 |
| 25 | Associated Petro Invest Inc | Stillwater, OK 74076-2346 | Oil & Gas Operator | May 2013 |
| 26 | Atteberry Engineering | Edmond, OK 73013-6624 | Oil & Gas Operator | Mar 2008 |
| 27 | Aztec Exploration Inc | Oklahoma City, OK 73143 | Oil & Gas Operator | May 2013 |