| 1 | C & C Tank Service LLC | | Oil & Gas Operator | Sep 2022 |
| 2 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Mar 2025 |
| 3 | C & Y Casing Pulling Company | Duncan, OK 73533 | Oil & Gas Operator | Apr 2025 |
| 4 | C E Harmon Oil Inc | Tulsa, OK 74136-6559 | Oil & Gas Operator | Apr 2025 |
| 5 | C.D. Operating Company, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 6 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2025 |
| 7 | Cabot Petroleum Corporation | Englewood, CO 80111-2529 | Oil & Gas Operator | Dec 2004 |
| 8 | Calpine Natural Gas Company L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 9 | Calvert Exploration Co | | Oil & Gas Operator | Apr 1993 |
| 10 | Camino Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 11 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 12 | Canard Colvert Operating LLC | Dallas, TX 75219-6243 | Oil & Gas Operator | Apr 2025 |
| 13 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Apr 2025 |
| 14 | Capitol Well Servicing Co., Inc. | Oklahoma City, OK 73143 | Oil & Gas Operator | May 2023 |
| 15 | Carbon Ridge Energy LLC | Norman, OK 73069 | Oil & Gas Operator | Apr 2025 |
| 16 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2025 |
| 17 | Casillas Operating LLC | Tulsa, OK 74103-4060 | Oil & Gas Operator | Apr 2025 |
| 18 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Apr 2025 |
| 19 | CBL Resources LLC | Tulsa, OK 74136-6308 | Oil & Gas Operator | Mar 2025 |
| 20 | Centaur Resources Inc | Oklahoma City, OK 73142-6804 | Oil & Gas Operator | Apr 2025 |
| 21 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Apr 2025 |
| 22 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Apr 2025 |
| 23 | Chance Oil Co., Inc. | Vernon, TX 76385 | Oil & Gas Operator | Apr 2025 |
| 24 | Chapman Energy Oklahoma, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 25 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jun 2025 |
| 26 | Cherokee Royalties & Minerals Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2025 |
| 27 | Chesapeake Exploration LLC | Oklahoma City, OK 731540496 | Oil & Gas Operator | Jul 2020 |
| 28 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 29 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Jun 2025 |
| 30 | Cheyenne Petroleum Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Jun 2025 |
| 31 | Cimarron Operating Company | Oklahoma City, OK 73112-3967 | Oil & Gas Operator | May 2011 |
| 32 | Cirrus Production Company | Enid, OK 73702 | Oil & Gas Operator | Mar 2025 |
| 33 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Jun 2025 |
| 34 | Citizen Energy II LLC | Tulsa, OK 74103-3729 | Oil & Gas Operator | Mar 2025 |
| 35 | Citizen Energy III LLC | Devner, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 36 | Claybrook Production Co. Inc. | Wewoka, OK 74884-1380 | Oil & Gas Operator | Jun 2014 |
| 37 | Clifton & Associates Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2020 |
| 38 | Coaleum Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jan 2001 |
| 39 | Coastal Oils Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2013 |
| 40 | Cobalt Environmental Solutions LLC | Oklahoma City, OK 73101-0249 | Oil Operator | Jun 2019 |
| 41 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 42 | Complete Energy Services LLC | Gainesville, TX 76240 | Oil Operator | Aug 2022 |
| 43 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 44 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 45 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 46 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 47 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Jun 2025 |
| 48 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Jun 2025 |
| 49 | Cordillera Energy Partners II LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Mar 2025 |
| 50 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 51 | Corner Energy LLC | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Mar 2015 |
| 52 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 53 | Cox Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2014 |
| 54 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 55 | CPRP Services LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Mar 2025 |
| 56 | Craig Elder Oil And Gas LLC | Edmond, OK 73013 | Oil & Gas Operator | Mar 2025 |
| 57 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 58 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2025 |
| 59 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 60 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 61 | Crystal Energy Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2019 |
| 62 | Csoda Operating Company LLC | Amarillo, TX 79114-7506 | Oil & Gas Operator | Aug 2021 |
| 63 | CSX Oil & Gas Corporation | Houston, TX 77210-4326 | Oil & Gas Operator | Mar 1993 |
| 64 | Cudd Operating Corp. | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2020 |