| 1 | A & B Oil & Gas Properties Inc | Sapulpa, OK 74067-0217 | Oil & Gas Operator | Apr 2011 |
| 2 | A & M Oilfield Sup Inc | | Oil & Gas Operator | Aug 1999 |
| 3 | A J Oil And Gas | Oilton, OK 74052-0112 | Oil & Gas Operator | Jun 2012 |
| 4 | A S B Oil & Gas Exploration LLC | Sand Springs, OK 74063-1508 | Oil & Gas Operator | Nov 2021 |
| 5 | A-1 Oil Operators | Beggs, OK 74421-0329 | Oil & Gas Operator | Jan 2013 |
| 6 | Abercrombie A L Inc | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 7 | Ablaze Drilling Company | Garland, TX 75044-2912 | Oil & Gas Operator | Aug 2013 |
| 8 | Ackley Earl H & Glenora Trust | Cushing, OK 74023-5230 | Oil & Gas Operator | Mar 2015 |
| 9 | Action Petroleum Service Corp | Ardmore, OK 73401 | Oil Operator | Dec 2025 |
| 10 | Ada Energy Exploration And Production LLC | Ada, OK 74820-0867 | Oil Operator | Nov 2025 |
| 11 | Adams Evertte | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 12 | Adams Res & Energy Co | Houston, TX 77001-0844 | Oil & Gas Operator | Mar 2015 |
| 13 | Advance Oil Corporation | Kiefer, OK 74041-4105 | Oil & Gas Operator | Dec 2025 |
| 14 | Aei Production Company | Edmond, OK 73083 | Oil & Gas Operator | Mar 2014 |
| 15 | Agape Inc | Broken Arrow, OK 74011-4256 | Oil & Gas Operator | Sep 2025 |
| 16 | Agate Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2015 |
| 17 | Ailey A C | Stroud, OK 74079-9209 | Oil & Gas Operator | Nov 2021 |
| 18 | Ajb Oil LLC | Tulsa, OK 74114-5218 | Oil Operator | Nov 2025 |
| 19 | Akin Jr Verna M & Emsley F | Maud, OK 74854 | Oil & Gas Operator | Apr 2002 |
| 20 | Alamo Resources Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 21 | Alexander, Milt M | | Oil Operator | Mar 2015 |
| 22 | Allen J W Revocable Trust | Tulsa, OK 74101-0411 | Oil Operator | Nov 1998 |
| 23 | Allen Kent | Okemah, OK 74859-9700 | Oil Operator | Aug 2025 |
| 24 | Allen Michael | Broken Arrow, OK 74014-2239 | Oil & Gas Operator | Aug 2025 |
| 25 | Allenergy Operating Co Inc | Coffeyville, KS 67337-6653 | Oil & Gas Operator | Mar 2015 |
| 26 | Allied Petroleum Inc | Oklahoma City, OK 73116-1516 | Oil & Gas Operator | Jun 2014 |
| 27 | Alpha Petro Development Inc | Tulsa, OK 74136-7048 | Oil & Gas Operator | May 2013 |
| 28 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Feb 2026 |
| 29 | Amax Petroleum Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2012 |
| 30 | American Capital Corporation | San Marcos, CA 92069 | Oil & Gas Operator | Sep 2014 |
| 31 | American Domestic MGMT Inc | Tulsa, OK 74155 | Oil & Gas Operator | Apr 2015 |
| 32 | American Petroleum & Environmental Consultants Inc | Edmond, OK 73013-8801 | Oil & Gas Operator | Nov 2025 |
| 33 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 34 | Andrea Operating Company | Edmond, OK 73013-6627 | Oil & Gas Operator | May 2025 |
| 35 | Andress Bill O | Tulsa, OK 74135-3553 | Oil & Gas Operator | Sep 2003 |
| 36 | Aog Operating LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 2025 |
| 37 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Feb 2026 |
| 38 | Apache Energy Resources Corp. | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 39 | Arrow Production Company | Tulsa, OK 74108 | Oil & Gas Operator | Dec 2009 |
| 40 | Asher Tip Corporation | Fairfax, OK 74637-0308 | Oil & Gas Operator | Nov 2003 |
| 41 | Ashley Jim Company (The) | Broken Arrow, OK 74012 | Oil Operator | Nov 2025 |
| 42 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 43 | Assiduous Energy LLC | Edmond, OK 73034 | Oil & Gas Operator | Dec 2025 |
| 44 | Associated Petro Invest Inc | Stillwater, OK 74076-2346 | Oil & Gas Operator | May 2013 |
| 45 | Atchley Resources, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Dec 2025 |
| 46 | Athan Inc | Edmond, OK 73013-6628 | Oil & Gas Operator | Dec 2025 |
| 47 | Atlantic Richfield Company | Houston, TX 77079 | Oil & Gas Operator | Dec 2016 |
| 48 | Autumn Exploration LTD | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2015 |
| 49 | Avondale Operating Co | Tulsa, OK 74145-7627 | Oil & Gas Operator | Apr 2019 |
| 50 | Axem Resources Inc | Denver, CO 80202-4617 | Oil & Gas Operator | Jul 2013 |
| 51 | Ayluma Operating Inc | Dewar, OK 74437 | Oil & Gas Operator | Oct 2024 |
| 52 | Azar Marsha | Chicago, IL 60618 | Oil Operator | Jan 2025 |
| 53 | Azure Energy LTD | Tulsa, OK 74135-7825 | Oil & Gas Operator | Dec 2025 |