| 1 | C & A Oil Company | Edmond, OK 73013-9413 | Oil & Gas Operator | Mar 2015 |
| 2 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Jan 2025 |
| 3 | C E D LC | Enid, OK 73702-0326 | Oil & Gas Operator | Oct 2021 |
| 4 | C.D. Operating Company, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 5 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2025 |
| 6 | Cabot Petroleum Corporation | Englewood, CO 80111-2529 | Oil & Gas Operator | Dec 2004 |
| 7 | Camino Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 8 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 9 | Canaan Resources X LLC | Oklahoma City, OK 73103-4925 | Oil & Gas Operator | Sep 2024 |
| 10 | Canard Colvert Operating LLC | Dallas, TX 75219-6243 | Oil & Gas Operator | Feb 2025 |
| 11 | Cane Creek Energy Partners Inc | Morris, OK 74445 | Oil & Gas Operator | Jan 2025 |
| 12 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Feb 2025 |
| 13 | Capstone Oil & Gas LLC | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2025 |
| 14 | Carbon Economy LLC | Chickasha, OK 73023 | Oil & Gas Operator | Feb 2025 |
| 15 | Carbon Ridge Energy LLC | Norman, OK 73069 | Oil & Gas Operator | Feb 2025 |
| 16 | Carl Humphries Inc | Piedmont, OK 73078-0514 | Oil & Gas Operator | Feb 2025 |
| 17 | Carmen Field LP | Tulsa, OK 74135 | Oil & Gas Operator | Mar 2008 |
| 18 | Carrera Energy LLC | Midland, TX 79704-5036 | Oil & Gas Operator | Jan 2025 |
| 19 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 20 | Cates Betty J | Tulsa, OK 74112 | Oil & Gas Operator | Nov 2016 |
| 21 | CBS Energy LLC | Oklahoma City, OK 73142-4437 | Oil & Gas Operator | Jan 2025 |
| 22 | CDS Oil Company | Tulsa, OK 74147-1514 | Oil & Gas Operator | Mar 2015 |
| 23 | Centurion Oil Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | May 1992 |
| 24 | Cep Mid-Continent LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jan 2025 |
| 25 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Feb 2025 |
| 26 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Feb 2025 |
| 27 | Chesapeake Energy MKT Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2022 |
| 28 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2025 |
| 29 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 30 | Cheyenne Petroleum Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2025 |
| 31 | Chisholm Oil And Gas Operating LLC | Tulsa, OK 74103-3522 | Oil & Gas Operator | Jan 2025 |
| 32 | Christie Jr C B | Wichita Falls, TX 76308-4873 | Oil & Gas Operator | May 2024 |
| 33 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 34 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 35 | Cimarron Operating Company | Oklahoma City, OK 73112-3967 | Oil & Gas Operator | May 2011 |
| 36 | Cirrus Production Company | Enid, OK 73702 | Oil & Gas Operator | Jan 2025 |
| 37 | Citizen Energy III LLC | Devner, CO 80202 | Oil & Gas Operator | Jan 2025 |
| 38 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 39 | Claybrook Production Co. Inc. | Wewoka, OK 74884-1380 | Oil & Gas Operator | Jun 2014 |
| 40 | Clifford Resources Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | Jul 2015 |
| 41 | CMS Nomeco Oil & Gas Co. | Jackson, MI 49201 | Oil & Gas Operator | Jan 2015 |
| 42 | Coaleum Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jan 2001 |
| 43 | Coenergy Operating Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 44 | Colt Resources Corporation | Billings, MT 59103 | Oil & Gas Operator | Feb 2013 |
| 45 | Comanche Exploration Co LLC | Oklahoma City, OK 73116-7334 | Oil & Gas Operator | Feb 2025 |
| 46 | Comanche Exploration Company | Oklahoma City, OK 73120-2797 | Oil & Gas Operator | Feb 2007 |
| 47 | Comanche Production Co | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |
| 48 | Comanche Resources Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2025 |
| 49 | Combined Resources Corporation | Edmond, OK 73083 | Oil & Gas Operator | Apr 2025 |
| 50 | Compass Drilling Inc | Enid, OK 73702-5467 | Oil & Gas Operator | Sep 2014 |
| 51 | Complete Energy Services LLC | Gainesville, TX 76240 | Oil Operator | Aug 2022 |
| 52 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 53 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 54 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 55 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 56 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 57 | Continental Exploration, L.L.C. | Lufkin, TX 75915 | Oil & Gas Operator | Apr 2025 |
| 58 | Continental Gas Inc | Enid, OK 73702-5103 | Oil & Gas Operator | Apr 2012 |
| 59 | Continental Natural Gas, Inc. | Tulsa, OK 74121 | Oil & Gas Operator | Jun 2018 |
| 60 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 61 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Apr 2025 |
| 62 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 63 | Cooper Energy Corp | | Oil & Gas Operator | Jun 1995 |
| 64 | Cooper Operating LLC | Yukon, OK 73099 | Oil & Gas Operator | Feb 2025 |
| 65 | Cordillera Energy Partners II LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Jan 2025 |
| 66 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 67 | Cory, Kenneth W. | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2012 |
| 68 | Council Oak Resources LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jan 2025 |
| 69 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 70 | CP Energy LLC | Edmond, OK 73034 | Oil Operator | Feb 2025 |
| 71 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 72 | CRB Resources Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2025 |
| 73 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 74 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2024 |
| 75 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 76 | Crude Marketing & Trans Inc | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2017 |
| 77 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 78 | Crusader Energy III LLC | Oklahoma City, OK 73142-1856 | Oil & Gas Operator | Feb 2011 |
| 79 | Cudd Operating Corp. | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2020 |
| 80 | Curzon Operating Company LTD | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Jan 2025 |
| 81 | CX Disposals LLC | Minco, OK 73059-9472 | Oil Operator | Jan 2025 |