| 1 | 007 Operating LLC | Sulphur, OK 73086 | Oil & Gas Operator | Jun 2025 |
| 2 | 212 Operating Inc | Byron, OK 73722-9528 | Oil & Gas Operator | Jan 2016 |
| 3 | 3tec Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 4 | Abarr Trust (The) | Oklahoma City, OK 73179 | Oil & Gas Operator | Jul 2025 |
| 5 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 6 | Agate Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2015 |
| 7 | Allen Oil & Gas LLC | Ardmore, OK 73401 | Oil Operator | Aug 2022 |
| 8 | Altex Energy Corporation | Oklahoma City, OK 73142-1920 | Oil & Gas Operator | Mar 2015 |
| 9 | Altex Resources, Inc. | Carney, OK 74832 | Oil & Gas Operator | Mar 2015 |
| 10 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Oct 2025 |
| 11 | American Petroleum & Environmental Consultants Inc | Edmond, OK 73013-8801 | Oil & Gas Operator | Jun 2025 |
| 12 | American Trading & Prod Corp | Houston, TX 77040-6471 | Oil & Gas Operator | Nov 2014 |
| 13 | Amsler Jerry & Denese | Enid, OK 73703-9300 | Oil & Gas Operator | Jul 2020 |
| 14 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 15 | Anadarko Minerals Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 16 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jul 2025 |
| 17 | Anderson, Carl T. | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2014 |
| 18 | Anstine & Musgrove Inc | Ponca City, OK 74602 | Oil & Gas Operator | Jun 2025 |
| 19 | Arp Oklahoma LLC | Fort Worth, TX 76102-7426 | Oil & Gas Operator | Feb 2020 |
| 20 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Oct 2025 |
| 21 | Arrowhead Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Jun 2025 |
| 22 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 23 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 24 | Avalon Exploration Inc | Tulsa, OK 74119-5401 | Oil & Gas Operator | Dec 2019 |
| 25 | Axem Resources Inc | Denver, CO 80202-4617 | Oil & Gas Operator | Jul 2013 |
| 26 | B R Polk Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Jun 2025 |
| 27 | Baker, Eberle Energy Corp. | Blackwell, OK 74631 | Oil & Gas Operator | Mar 2015 |
| 28 | Banner Oil & Gas LLC | Oklahoma City, OK 73159 | Oil & Gas Operator | Jun 2025 |
| 29 | Bargo Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2014 |
| 30 | Bateman'S Bay Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Jun 2025 |
| 31 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 32 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2025 |
| 33 | Be Anadarko LLC | Wimberley, TX 78676-4418 | Oil & Gas Operator | Jan 2024 |
| 34 | Beard Oil Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2013 |
| 35 | Beck Pump & Supply Inc | Hennessey, OK 73742-0175 | Oil & Gas Operator | Nov 2019 |
| 36 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | Jun 2025 |
| 37 | Berry, Thomas N. & Co. | Stillwater, OK 74076 | Oil & Gas Operator | Feb 2012 |
| 38 | Beta Operating Company, LLC | Houston, TX 77210 | Oil & Gas Operator | Apr 2020 |
| 39 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 40 | BHP Petroleum Company Inc | Houston, TX 77057 | Oil & Gas Operator | Jun 2016 |
| 41 | Bison Energy Corporation | Wichita, KS 67206 | Oil & Gas Operator | Mar 2022 |
| 42 | Blackcat Oil Company | Glencoe, OK 74032 | Oil & Gas Operator | Jul 2025 |
| 43 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Oct 2025 |
| 44 | Blair Oil Company | Kingfisher, OK 73750-1213 | Oil & Gas Operator | Jun 2025 |
| 45 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2025 |
| 46 | Bluestem Resources LLC | Kerrville, TX 78028 | Oil & Gas Operator | Oct 2025 |
| 47 | BMC Petroleum Inc | Enid, OK 73701-2700 | Oil & Gas Operator | Jul 2025 |
| 48 | Bob & Son Oil Company | Hennessey, OK 73742-0578 | Oil & Gas Operator | Jul 2017 |
| 49 | Bobwhite Production Company, Inc | Tulsa, OK 74112 | Oil & Gas Operator | May 2025 |
| 50 | Bowles Jack P F | Edmond, OK 73083-3285 | Oil & Gas Operator | Sep 2021 |
| 51 | Boxie Oil Co | Asher, OK 74826-0243 | Oil & Gas Operator | Feb 2008 |
| 52 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 53 | Bramlett Corporation | Medford, OK 73759 | Oil & Gas Operator | Jul 2025 |
| 54 | Branson Production Company | Oklahoma City, OK 73123-1323 | Oil & Gas Operator | Aug 2002 |
| 55 | Braxton Oil And Gas Corp. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2021 |
| 56 | Brewer Carroll L | Edmond, OK 73003-0010 | Oil & Gas Operator | Jun 2025 |
| 57 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 58 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 59 | BRG Production Company | Tulsa, OK 74136-6338 | Oil & Gas Operator | Jul 2025 |
| 60 | Bricar Inc | Oklahoma City, OK 73108 | Oil & Gas Operator | Nov 1998 |
| 61 | Brighton Energy LLC | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 62 | Briscoe Oil Company | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Apr 2014 |
| 63 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 64 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 65 | Brower, Robert C. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 2025 |
| 66 | Brown & Borelli, Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Oct 2025 |
| 67 | Buccaneer Petroleum Inc | Tonkawa, OK 74653-2513 | Oil & Gas Operator | Jan 2013 |
| 68 | Burkhart Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2002 |
| 69 | BVD Inc | Yates Center, KS 66783-0194 | Oil & Gas Operator | Jul 2025 |
| 70 | Bwab Incorporated | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 71 | C & G Energy Inc | | Oil & Gas Operator | Jun 1996 |
| 72 | C E D LC | Enid, OK 73702-0326 | Oil & Gas Operator | Oct 2021 |
| 73 | C&D Supply | Cherokee, OK 73728-5817 | Oil & Gas Operator | Jun 2025 |
| 74 | C.D. Operating Company, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 75 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 76 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Jul 2025 |
| 77 | Canyon Creek Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2025 |
| 78 | Capitol Well Servicing Co., Inc. | Oklahoma City, OK 73143 | Oil & Gas Operator | May 2023 |
| 79 | Capmac Inc | Tulsa, OK 74105-7119 | Oil & Gas Operator | Jan 2007 |
| 80 | Carl E Gungoll Exploration Inc | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Jan 2016 |
| 81 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Jul 2025 |
| 82 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Jul 2025 |
| 83 | Caulkins Oil Company | Aztec, NM 87410 | Oil & Gas Operator | Oct 2024 |
| 84 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Jul 2025 |
| 85 | CH4 Energy II LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Apr 2018 |
| 86 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Aug 2025 |
| 87 | Challenge Operating Inc | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 88 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Jul 2025 |
| 89 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 2025 |
| 90 | Chermac Energy Corporation | Edmond, OK 73083 | Oil & Gas Operator | Apr 2020 |
| 91 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |
| 92 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 93 | Cirrus Production Company | Enid, OK 73702 | Oil & Gas Operator | Jun 2025 |
| 94 | Cisco Operating LLC | Plano, TX 75024 | Oil & Gas Operator | Jun 2025 |
| 95 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 96 | Cities Services Company | | Oil & Gas Operator | Mar 2008 |
| 97 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 98 | Claremont Exploration Inc | Tulsa, OK 74103-4107 | Oil & Gas Operator | Jun 1997 |
| 99 | Cleary Exploration LLC | Oklahoma City, OK 73112-7221 | Oil & Gas Operator | Oct 2014 |
| 100 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |