| 1 | C & C Productions LLC | | Oil & Gas Operator | Feb 2024 |
| 2 | C & J Exploration LLC | Colorado Springs, CO 80920-3946 | Oil & Gas Operator | Oct 2022 |
| 3 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Feb 2024 |
| 4 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Jan 2024 |
| 5 | Calyx Energy III LLC | | Oil & Gas Operator | Jan 2024 |
| 6 | Cane Creek Energy Partners Inc | Morris, OK 74445-2674 | Oil & Gas Operator | Jan 2024 |
| 7 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Mar 2024 |
| 8 | Capmac Inc | Tulsa, OK 74105-7119 | Oil & Gas Operator | Jan 2007 |
| 9 | Capstone Oilfield Disposal Service LLC | Hennessey, OK 73742-0698 | Oil Operator | Dec 2019 |
| 10 | Carlson Petroleum Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 11 | Carver Harry | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 2000 |
| 12 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Feb 2024 |
| 13 | Cassidy Jr John | Stroud, OK 74079-0200 | Oil & Gas Operator | Nov 2014 |
| 14 | Castelli Exploration, Inc. | Oklahoma City, OK 73162 | Oil & Gas Operator | Jan 2024 |
| 15 | Cei Operating LLC | Katy, TX 77449 | Oil & Gas Operator | Apr 2024 |
| 16 | Cenpat Operating LLC | Houston, TX 77042-3044 | Oil & Gas Operator | Jan 2024 |
| 17 | Central Ok Reclamation LLC | | Oil & Gas Operator | Jun 2014 |
| 18 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2024 |
| 19 | Challenge Operating Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 20 | Chapman Jim | Bristow, OK 74010-1173 | Oil Operator | Apr 2021 |
| 21 | Cher Oil Company LTD | Ripley, OK 74062-6227 | Oil & Gas Operator | Jan 2024 |
| 22 | Cherokee Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 23 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2024 |
| 24 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 25 | Circle 9 Resources LLC | | Oil & Gas Operator | Jan 2024 |
| 26 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Apr 2024 |
| 27 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 28 | Claborn Julia | Okmulgee, OK 74447-9781 | Oil & Gas Operator | Mar 2022 |
| 29 | Claremont Exploration Inc | Tulsa, OK 74103-4107 | Oil & Gas Operator | Jun 1997 |
| 30 | Clark Operating Services, Inc. | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 31 | Clear Creek Royalty LLC | Tulsa, OK 74170-0714 | Oil & Gas Operator | Jul 2023 |
| 32 | Cleary Exploration LLC | Oklahoma City, OK 73112-7221 | Oil & Gas Operator | Oct 2014 |
| 33 | Clifton & Associates Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2020 |
| 34 | CLV Oil & Gas Inc | Tulsa, OK 74169-0713 | Oil & Gas Operator | Apr 2020 |
| 35 | CM Exploration Company Inc. | | Oil & Gas Operator | Apr 2009 |
| 36 | CMT Oil & Gas Company Inc | Tulsa, OK 74133-6754 | Oil & Gas Operator | Jan 2024 |
| 37 | CMT Operating LLC | Cleveland, OK 74020-0113 | Oil & Gas Operator | Mar 2015 |
| 38 | Columbia Production Company | Edmond, OK 73083 | Oil & Gas Operator | May 2020 |
| 39 | Confederate Bay LLC | | Oil & Gas Operator | Jan 2024 |
| 40 | Confederate Spooling Inc | Okemah, OK 74859-2409 | Oil & Gas Operator | Apr 2020 |
| 41 | Conner Production Co LLC | Seminole, OK 74818-0349 | Oil & Gas Operator | Jan 2024 |
| 42 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 43 | Consolidated Peto Equity LTD | La Crescenta, CA 91214 | Oil & Gas Operator | Dec 1996 |
| 44 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Apr 2024 |
| 45 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 46 | Cook Oil Company | Wewoka, OK 74884-0875 | Oil & Gas Operator | Sep 2015 |
| 47 | Cooper Lisa L | Cushing, OK 74023 | Oil & Gas Operator | Mar 2015 |
| 48 | Cornelius Tony | Sapulpa, OK 74066-5845 | Oil & Gas Operator | Nov 2023 |
| 49 | Cross Timbers Oil Company | Dallas, TX 75284 | Oil & Gas Operator | May 2013 |
| 50 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Jan 2024 |
| 51 | Crude Marketing & Trans Inc | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2017 |
| 52 | Culbreath Oil & Gas Co Inc | Tulsa, OK 74135 | Oil & Gas Operator | Feb 2024 |
| 53 | Cumberland Operating Company | Seminole, OK 74868-1258 | Oil & Gas Operator | Mar 2007 |
| 54 | CW Investments | Okmulgee, OK 74447-4026 | Oil & Gas Operator | Jan 2024 |
| 55 | Cyanostar Energy, Inc | Tulsa, OK 74103-4122 | Oil & Gas Operator | Sep 2001 |
| 56 | Cypress Exploration Company | Tulsa, OK 74132 | Oil & Gas Operator | Jan 2024 |