| 1 | A & I Properties Inc | Oklahoma City, OK 73107 | Gas Operator | Jun 2007 |
| 2 | A-1 Oil Operators | Beggs, OK 74421-0329 | Oil & Gas Operator | Jan 2013 |
| 3 | ABC Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2023 |
| 4 | Abercrombie, A. L., Inc | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 5 | Ablaze Drilling Company | Garland, TX 75044-2912 | Oil & Gas Operator | Aug 2013 |
| 6 | Ackley Earl H & Glenora Trust | Cushing, OK 74023-5230 | Oil & Gas Operator | Mar 2015 |
| 7 | Adkins Jim | Weleetka, OK 74880-8057 | Oil & Gas Operator | Apr 2020 |
| 8 | Agape Inc | Broken Arrow, OK 74011-4256 | Oil & Gas Operator | May 2025 |
| 9 | Ajb Oil LLC | Tulsa, OK 74114-5218 | Oil Operator | Jun 2025 |
| 10 | Alameda Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 1994 |
| 11 | Alamo Resources Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 12 | Albright Paul D Or Inger J | Okemah, OK 74859-9309 | Oil & Gas Operator | Feb 2025 |
| 13 | Alexander-Loop Oil Prop. Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Nov 1998 |
| 14 | Allen Delmar | Okemah, OK 74859-9801 | Oil & Gas Operator | Dec 2000 |
| 15 | Allen Kent | Okemah, OK 74859-9700 | Oil Operator | Apr 2025 |
| 16 | Allied Petroleum Inc. | Oklahoma City, OK 73116-1516 | Oil & Gas Operator | Jun 2014 |
| 17 | Alpine Inc | Oklahoma City, OK 73134-2504 | Oil & Gas Operator | Feb 2024 |
| 18 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Oct 2025 |
| 19 | American Domestic MGMT Inc | Tulsa, OK 74155 | Oil & Gas Operator | Apr 2015 |
| 20 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 21 | Andco Mud Inc | Edmond, OK 73034-3910 | Oil & Gas Operator | Mar 2006 |
| 22 | Anjet Petroleum Company Inc | Gulfport, MS 39507-1301 | Oil & Gas Operator | Aug 2017 |
| 23 | Anson J W | Seminole, OK 74818-1280 | Oil & Gas Operator | Oct 2020 |
| 24 | Anson Robert L & Teresa M | Seminole, OK 74868 | Oil & Gas Operator | Jun 2025 |
| 25 | Antlers Energy LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2025 |
| 26 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 27 | Arbor Petroleum Corporation | Oklahoma City, OK 73102-4003 | Oil & Gas Operator | Mar 2011 |
| 28 | Archibald Oil & Gas Operating Inc | Ada, OK 74820 | Oil & Gas Operator | Jun 2025 |
| 29 | Aries Exploration Co Inc | Maud, OK 74854-0160 | Oil & Gas Operator | May 2013 |
| 30 | Arkoma Resources LLC | Henryetta, OK 74437 | Oil & Gas Operator | Jul 2025 |
| 31 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Oct 2025 |
| 32 | Arrowhead Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Jun 2025 |
| 33 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 34 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 35 | Autumn Exploration LTD | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2015 |
| 36 | Avondale Operating Co | Tulsa, OK 74145-7627 | Oil & Gas Operator | Apr 2019 |
| 37 | Avra Oil Co | Dallas, TX 75248 | Oil & Gas Operator | Oct 2025 |
| 38 | Axem Resources Inc | Denver, CO 80202-4617 | Oil & Gas Operator | Jul 2013 |
| 39 | Ayluma Operating Inc | Dewar, OK 74437 | Oil & Gas Operator | Oct 2024 |