| 1 | 007 Operating LLC | | Oil & Gas Operator | May 2021 |
| 2 | 101 Energy Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Apr 2021 |
| 3 | 212 Operating Inc | Byron, OK 73722-9528 | Oil & Gas Operator | Nov 2015 |
| 4 | 3 BC Co Inc | Cushing, OK 74023-1268 | Oil & Gas Operator | Apr 2021 |
| 5 | 3D Oil Company, LLC | Corpus Chrsti, TX 78406 | Oil & Gas Operator | Jun 2021 |
| 6 | 3M Production Inc | Guthrie, OK 73044-1246 | Oil & Gas Operator | Mar 2021 |
| 7 | 3R Oil Corporation | Healdton, OK 73438-0306 | Oil Operator | Nov 2015 |
| 8 | 4G Operating LLC | | Gas Operator | Mar 2021 |
| 9 | 51 Gas LLC | | Gas Operator | Mar 2021 |
| 10 | A & A Tank Truck Company | Norman, OK 73070-8969 | Oil & Gas Operator | Apr 2021 |
| 11 | A E W Inc | Okmulgee, OK 74447-0267 | Oil & Gas Operator | Mar 2015 |
| 12 | A H & L Operating Company Inc | Norman, OK 73070-4084 | Gas Operator | Apr 2015 |
| 13 | Aaron Well Service Inc | | Gas Operator | Apr 2021 |
| 14 | Abarr Trust (The) | Oklahoma City, OK 73123-0084 | Oil & Gas Operator | Apr 2021 |
| 15 | ABC Oil & Gas | Morris, OK 74445-0273 | Oil Operator | Dec 2015 |
| 16 | ABC Oil Company Inc | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2021 |
| 17 | Abercrombie A L Inc | Wichita, KS 67202 | Oil & Gas Operator | Feb 2021 |
| 18 | Able Oil Company | Morris, OK 74445-2303 | Oil Operator | Mar 2021 |
| 19 | Abng Inc | Chickasha, OK 73023-0926 | Oil & Gas Operator | Nov 2015 |
| 20 | Abraxas Petroleum Corporation | San Antonio, TX 78258 | Oil & Gas Operator | Jun 2021 |
| 21 | Ac Oil & Gas LLC | | Oil & Gas Operator | Apr 2021 |
| 22 | Ac Operating Company LLC | | Oil Operator | Nov 2015 |
| 23 | Acacia Exploration Partners LLC | | Gas Operator | Feb 2021 |
| 24 | Accelerant Natural Gas LLC | | Gas Operator | Apr 2021 |
| 25 | Acoma Oil Corporation | Fort Worth, TX 76108 | Oil & Gas Operator | Jun 2021 |
| 26 | Adams Resources Expl. Corp. | Houston, TX 77001 | Oil & Gas Operator | Jan 2018 |
| 27 | Adparo LLC | | Gas Operator | Apr 2021 |
| 28 | Advance Oil Corporation | Kiefer, OK 74041-4105 | Oil & Gas Operator | May 2017 |
| 29 | Adventure Properties Inc | Seminole, OK 74868-1296 | Oil Operator | Jan 2021 |
| 30 | Aethon I LP | Dallas, TX 75206 | Oil & Gas Operator | Nov 2007 |
| 31 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Apr 2021 |
| 32 | Afo LLC | Velma, OK 73491-0155 | Oil Operator | Dec 2015 |
| 33 | Agape Inc | Broken Arrow, OK 74011-4256 | Oil Operator | Nov 2015 |
| 34 | Agate Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Aug 2015 |
| 35 | Agave Energy Inc | Stigler, OK 74462 | Oil & Gas Operator | Apr 2021 |
| 36 | Aguila Operating Company LLC | | Gas Operator | Apr 2021 |
| 37 | Aikman Brothers | Midland, TX 79705 | Gas Operator | Apr 1996 |
| 38 | Aikman Brothers, LLC | Amarillo, TX 79109 | Oil & Gas Operator | Mar 2021 |
| 39 | Aladdin Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2021 |
| 40 | Alda Oil & Gas Corporation | Oklahoma City, OK 73116 | Oil & Gas Operator | Dec 2009 |
| 41 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 42 | Alexander Oil Company | Loco, OK 73442-9409 | Oil Operator | Apr 2021 |
| 43 | All Exploration LLC | Oklahoma City, OK 73120-7829 | Oil & Gas Operator | Apr 2020 |
| 44 | Allen Michael | Broken Arrow, OK 74014-2239 | Oil & Gas Operator | Dec 2015 |
| 45 | Allenergy Operating Co Inc | Coffeyville, KS 67337-6653 | Oil & Gas Operator | Aug 2015 |
| 46 | Alliance Oil & Gas Co Inc | Corinth, TX 76205 | Oil & Gas Operator | Mar 2015 |
| 47 | Allied Operating LLC | Bowling Green, KY 42101-3980 | Oil & Gas Operator | Nov 2015 |
| 48 | Alligator Rock Well Service LLC | | Gas Operator | Apr 2021 |
| 49 | Almont Energy LLC | | Oil & Gas Operator | Sep 2017 |
| 50 | Alpine Inc | Oklahoma City, OK 73134-2504 | Oil & Gas Operator | Jun 2017 |
| 51 | Altex Energy Corporation | Oklahoma City, OK 73142-1920 | Oil & Gas Operator | Mar 2015 |
| 52 | Altex Resources, Inc. | Carney, OK 74832 | Oil & Gas Operator | Jul 2015 |
| 53 | Altman Energy, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Jun 2021 |
| 54 | Alvarado 2014 LLC | | Oil & Gas Operator | Mar 2021 |
| 55 | Am Oil Company | Cyril, OK 73029-0053 | Oil & Gas Operator | Apr 2021 |
| 56 | Amarillo Exploration, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Jun 2021 |
| 57 | Amax Oil & Gas Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2009 |
| 58 | Amax Petroleum Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2015 |
| 59 | American Cometra, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2008 |
| 60 | American Energy Corporation | Bealsville, OH 43716 | Oil & Gas Operator | Dec 2019 |
| 61 | American Energy LLC | Lake Zurich, IL 60047-0129 | Oil & Gas Operator | Jul 2015 |
| 62 | American Int'L Energy Corp. | Houston, TX 77057 | Oil & Gas Operator | Nov 2015 |
| 63 | American Natural Energy Corp | Oklahoma City, OK 73114 | Oil & Gas Operator | Oct 2018 |
| 64 | American Natural Resources LLC | Tulsa, OK 74145-1117 | Oil & Gas Operator | Apr 2021 |
| 65 | American Petrofina Co Of TX | Dallas, TX 75221-2159 | Oil Operator | Nov 2019 |
| 66 | American Petroleum & Environmental Consultants Inc | Edmond, OK 73013-8801 | Oil Operator | Mar 2021 |
| 67 | American Petroleum & Mineral Co Inc | Seminole, OK 74818-1559 | Oil & Gas Operator | Dec 2015 |
| 68 | American Trading & Prod Corp | Houston, TX 77040-6471 | Oil & Gas Operator | Nov 2014 |
| 69 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Dec 2019 |
| 70 | Americana Energy Inc | Byng, OK 74820-9574 | Oil & Gas Operator | Mar 2021 |
| 71 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 72 | Amerril Energy LLC | Houston, TX 77042 | Oil & Gas Operator | Jun 2021 |
| 73 | Amplify Oklahoma Operating LLC | | Oil & Gas Operator | Mar 2021 |
| 74 | Amsler Jerry & Denese | Enid, OK 73703-9300 | Oil & Gas Operator | Jan 2016 |
| 75 | Amvest Osage Inc | Skiatook, OK 74070-0970 | Oil & Gas Operator | Dec 2015 |
| 76 | An-Son Corp | Oklahoma City, OK 73124-0060 | Gas Operator | Mar 2021 |
| 77 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Jun 2021 |
| 78 | Anadarko Minerals, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2021 |
| 79 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Mar 2021 |
| 80 | Anadarko Water Resource MGMT LLC | Burns Flat, OK 73624-0229 | Gas Operator | Nov 2015 |
| 81 | Anc Investments LLC | Enid, OK 73701-1823 | Gas Operator | Jan 2015 |
| 82 | Anderson Floyd Melton Revocable Trust | Yukon, OK 73099-5656 | Oil Operator | Jul 2015 |
| 83 | Anderson Oil Company | Burkburnett, TX 76354 | Oil & Gas Operator | Oct 2015 |
| 84 | Andress Bill O | Tulsa, OK 74135-3553 | Gas Operator | Apr 1990 |
| 85 | Angel Exploration Company | Oklahoma City, OK 73102-8868 | Oil & Gas Operator | Feb 2021 |
| 86 | Angel Exploration LLC | Oklahoma City, OK 73116-3603 | Oil & Gas Operator | Apr 2021 |
| 87 | Anndell Energy Corporation | Mustang, OK 73064-9338 | Oil & Gas Operator | Jul 2006 |
| 88 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Sep 2017 |
| 89 | Anson Company | Oklahoma City, OK 73124 | Oil & Gas Operator | Oct 1997 |
| 90 | Anson J W | Seminole, OK 74818-1280 | Oil & Gas Operator | Oct 2020 |
| 91 | Anson Oil | Seminole, OK 74868-9405 | Oil & Gas Operator | Nov 2015 |
| 92 | Antares Energy Company | Houston, TX 77010 | Oil & Gas Operator | Jun 2021 |
| 93 | Antero Resources Corporation | Denver, CO 80202 | Oil & Gas Operator | Mar 2021 |
| 94 | Antioch Operating LLC | | Oil & Gas Operator | Apr 2021 |
| 95 | Antlers Energy LLC | | Gas Operator | Mar 2021 |
| 96 | Apache Corporation | Houston, TX 77056 | Oil & Gas Operator | Jun 2021 |
| 97 | Apc Operating Partnership LP | Tulsa, OK 74136-4224 | Gas Operator | Sep 2015 |
| 98 | Apexco, Inc. | Sand Springs, OK 74063 | Oil & Gas Operator | Jun 2021 |
| 99 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Apr 2021 |
| 100 | Arapahoe Resources LLC | Oklahoma City, OK 73157-7107 | Gas Operator | Sep 2014 |