| 1 | 101 Energy Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | May 2018 |
| 2 | 212 Operating Inc | Byron, OK 73722-9528 | Oil & Gas Operator | Nov 2015 |
| 3 | 3 BC Co Inc | Cushing, OK 74023-1268 | Oil & Gas Operator | May 2018 |
| 4 | 3fearns LLC | | Gas Operator | May 2018 |
| 5 | 3M Production Inc | Guthrie, OK 73044-1246 | Oil & Gas Operator | May 2018 |
| 6 | 3R Oil Corporation | Healdton, OK 73438-0306 | Oil Operator | Nov 2015 |
| 7 | 51 Gas LLC | | Gas Operator | May 2018 |
| 8 | A & A Tank Truck Company | Norman, OK 73070-8969 | Oil & Gas Operator | Mar 2018 |
| 9 | A E W Inc | Okmulgee, OK 74447-0267 | Oil & Gas Operator | Mar 2015 |
| 10 | A H & L Operating Company Inc | Norman, OK 73070-4084 | Gas Operator | Apr 2015 |
| 11 | Abarr Trust (The) | Oklahoma City, OK 73123-0084 | Oil & Gas Operator | May 2018 |
| 12 | ABC Oil & Gas | Morris, OK 74445-0273 | Oil Operator | Dec 2015 |
| 13 | ABC Oil Company Inc | Wichita Falls, TX 76307-1469 | Oil & Gas Operator | Feb 2018 |
| 14 | Abercrombie A L Inc | Wichita, KS 67202 | Oil & Gas Operator | Mar 2018 |
| 15 | Abng Inc | Chickasha, OK 73023-0926 | Oil & Gas Operator | Nov 2015 |
| 16 | Abraxas Petroleum Corporation | San Antonio, TX 78258 | Oil & Gas Operator | Jul 2018 |
| 17 | Ac Oil & Gas LLC | | Oil & Gas Operator | May 2018 |
| 18 | Ac Operating Company LLC | | Oil Operator | Nov 2015 |
| 19 | Accelerant Natural Gas LLC | | Gas Operator | Apr 2018 |
| 20 | Acoma Oil Corporation | Saint Paul, MN 55102 | Oil & Gas Operator | Jul 2018 |
| 21 | Adams Affiliates, Inc. | Tulsa, OK 74121 | Oil & Gas Operator | Jul 2018 |
| 22 | Adams Resources Expl. Corp. | Houston, TX 77001 | Oil & Gas Operator | Jan 2018 |
| 23 | Adparo LLC | | Gas Operator | May 2018 |
| 24 | Advance Oil Corporation | Kiefer, OK 74041-4105 | Oil & Gas Operator | May 2017 |
| 25 | Adventure Properties Inc | Seminole, OK 74868-1296 | Oil Operator | Sep 2017 |
| 26 | Aethon I LP | Dallas, TX 75206-5170 | Oil & Gas Operator | Nov 2007 |
| 27 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 2018 |
| 28 | Afo LLC | Velma, OK 73491-0155 | Oil Operator | Dec 2015 |
| 29 | Agape Inc | Broken Arrow, OK 74011-4256 | Oil Operator | Nov 2015 |
| 30 | Agate Petroleum, Inc. | Tulsa, OK 74136-5741 | Oil & Gas Operator | Aug 2015 |
| 31 | Agave Energy Inc | Stigler, OK 74462 | Oil & Gas Operator | May 2018 |
| 32 | Aikman Brothers | Midland, TX 79705 | Gas Operator | Apr 1996 |
| 33 | Aikman Brothers, LLC | Amarillo, TX 79109 | Oil & Gas Operator | Apr 2018 |
| 34 | Alda Oil & Gas Corporation | Oklahoma City, OK 73178-0032 | Oil & Gas Operator | Dec 2009 |
| 35 | Alexander Energy Corporation | Oklahoma City, OK BAD ADDR | Oil & Gas Operator | Mar 2015 |
| 36 | Alexander Oil Company | Bakersfield, CA 93314-8881 | Oil Operator | Feb 2018 |
| 37 | All Exploration LLC | Oklahoma City, OK 73120-7829 | Oil & Gas Operator | Apr 2018 |
| 38 | Allen Michael | Broken Arrow, OK 74014-2239 | Oil & Gas Operator | Dec 2015 |
| 39 | Allenergy Operating Co Inc | Coffeyville, KS 67337-6653 | Oil & Gas Operator | Aug 2015 |
| 40 | Alliance Oil & Gas Co Inc | Corinth, TX 76205 | Oil & Gas Operator | Mar 2015 |
| 41 | Allied Operating LLC | Bowling Green, KY 42101-3980 | Oil & Gas Operator | Nov 2015 |
| 42 | Almont Energy LLC | | Oil & Gas Operator | May 2018 |
| 43 | Alpine Inc | Oklahoma City, OK 73134-2504 | Oil & Gas Operator | Jun 2017 |
| 44 | Altex Energy Corporation | Oklahoma City, OK 73142-1920 | Oil & Gas Operator | Mar 2015 |
| 45 | Altex Resources, Inc. | Carney, OK 74832-0420 | Oil & Gas Operator | Jul 2015 |
| 46 | Altman Energy, Inc. | Tulsa, OK 74119-5457 | Oil & Gas Operator | Jul 2018 |
| 47 | Alvarado 2014 LLC | | Oil & Gas Operator | May 2018 |
| 48 | Am Oil Company | Cyril, OK 73029-0053 | Oil & Gas Operator | Dec 2017 |
| 49 | Amarillo Exploration, Inc. | Dallas, TX 75360-1539 | Oil & Gas Operator | Jul 2018 |
| 50 | Amax Oil & Gas Inc. | Houston, TX BAD ADDR | Oil & Gas Operator | Mar 2009 |
| 51 | Amax Petroleum Corporation | Houston, TX 77042 | Oil & Gas Operator | Apr 2018 |
| 52 | American Cometra, Inc. | FT Worth, TX 76117 | Oil & Gas Operator | Mar 2008 |
| 53 | American Energy Corporation | Bealsville, OH 43716 | Oil & Gas Operator | Dec 2016 |
| 54 | American Energy LLC | Lake Zurich, IL 60047-0129 | Oil & Gas Operator | Jul 2015 |
| 55 | American Int'L Energy Corp. | Houston, TX 77057 | Oil & Gas Operator | Nov 2015 |
| 56 | American Natural Energy Corp | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2018 |
| 57 | American Natural Resources LLC | Tulsa, OK 74145-1117 | Oil & Gas Operator | Jun 2017 |
| 58 | American Petroleum & Environmental Consultants Inc | Edmond, OK 73013-8801 | Oil Operator | Mar 2018 |
| 59 | American Petroleum & Mineral Co Inc | Seminole, OK 74818-1559 | Oil & Gas Operator | May 2018 |
| 60 | American Trading & Prod Corp | Houston, TX 77040-6471 | Oil & Gas Operator | Nov 2014 |
| 61 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Mar 2018 |
| 62 | Americana Energy Inc | Byng, OK 74820-9574 | Oil & Gas Operator | Apr 2018 |
| 63 | Americo Oil Company | Oklahoma City, OK 73154-0964 | Oil & Gas Operator | Mar 2015 |
| 64 | Amerril Energy LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2018 |
| 65 | Amsler Jerry & Denese | Enid, OK 73703-9300 | Oil & Gas Operator | Jan 2016 |
| 66 | Amvest Osage Inc | Skiatook, OK 74070-0970 | Oil & Gas Operator | Dec 2015 |
| 67 | An-Son Corp | Oklahoma City, OK 73124-0060 | Gas Operator | Dec 2017 |
| 68 | Anadarko E&P Onshore LLC | Houston, TX 77251-1330 | Oil & Gas Operator | Dec 2018 |
| 69 | Anadarko Minerals, Inc. | Oklahoma City, OK 73102-8606 | Oil & Gas Operator | May 2018 |
| 70 | Anadarko Petroleum Corporation | Houston, TX 77251-1330 | Oil & Gas Operator | Apr 2018 |
| 71 | Anadarko Water Resource MGMT LLC | Burns Flat, OK 73624-0229 | Gas Operator | May 2018 |
| 72 | Anc Investments LLC | Enid, OK 73701-1823 | Gas Operator | Feb 2018 |
| 73 | Anderson Floyd Melton Revocable Trust | Yukon, OK 73099-5656 | Oil Operator | Jul 2015 |
| 74 | Anderson Oil Company | Washington, MS 39190 | Oil & Gas Operator | Oct 2015 |
| 75 | Angel Exploration LLC | Oklahoma City, OK 73116-3603 | Oil & Gas Operator | May 2018 |
| 76 | Anndell Energy Corporation | Mustang, OK 73064-9338 | Oil & Gas Operator | Jul 2006 |
| 77 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Sep 2017 |
| 78 | Anson Company | Oklahoma City, OK 73116-1679 | Oil & Gas Operator | Oct 1997 |
| 79 | Anson J W | Seminole, OK 74818-1280 | Oil & Gas Operator | Jun 2017 |
| 80 | Anson Oil | Seminole, OK 74868-9405 | Oil & Gas Operator | Nov 2015 |
| 81 | Antares Energy Company | Houston, TX 77002-7700 | Oil & Gas Operator | Jul 2018 |
| 82 | Antero Resources Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 83 | Antioch Operating LLC | | Oil & Gas Operator | May 2018 |
| 84 | Apache Corporation | Houston, TX 77056 | Oil & Gas Operator | Jul 2018 |
| 85 | Apc Operating Partnership LP | Tulsa, OK 74136-4224 | Gas Operator | Sep 2015 |
| 86 | Apexco, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Jul 2018 |
| 87 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | May 2018 |
| 88 | Aqua-Oil Inc | Enid, OK 73703-6511 | Gas Operator | Apr 2018 |
| 89 | Arbuckle Enterprises Inc | Edmond, OK 73083 | Oil & Gas Operator | Dec 2017 |
| 90 | Arch Oil & Gas, LLC | Dallas, TX 75248-2609 | Oil & Gas Operator | Jul 2018 |
| 91 | Archibald Oil & Gas Operating Inc | Ada, OK 74821-0305 | Oil & Gas Operator | Apr 2018 |
| 92 | Arcotex Oil & Gas Inc | Gainesville, TX 76241-1357 | Oil & Gas Operator | Jan 2018 |
| 93 | Ardmore Production & Exploration Co | Ardmore, OK 73402-1988 | Oil & Gas Operator | Apr 2018 |
| 94 | Arena Resources Inc | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2015 |
| 95 | Argali Resources | Dallas, TX 75225 | Oil & Gas Operator | Mar 2015 |
| 96 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Mar 2018 |
| 97 | Aries Operating, LP | Houston, TX 77042 | Oil & Gas Operator | Jul 2018 |
| 98 | Arkoma Gas Company | Edmond, OK 73003-5672 | Gas Operator | Dec 2009 |
| 99 | Arkoma Resources LLC | Henryetta, OK 74437-0306 | Oil & Gas Operator | Apr 2018 |
| 100 | Armor Energy LLC | | Oil & Gas Operator | Apr 2018 |