| 1 | C & C Productions LLC | Muskogeee, OK 74402 | Oil & Gas Operator | Jul 2025 |
| 2 | C & J Exploration LLC | Colorado Springs, CO 80920-3946 | Oil & Gas Operator | Oct 2022 |
| 3 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 4 | C & T Energy LLC | Morris, OK 74445-2667 | Oil & Gas Operator | Jun 2025 |
| 5 | C L Conner | Humble, TX 77338 | Oil & Gas Operator | Mar 2025 |
| 6 | C.D. Operating Company, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 7 | Calvert Operating LLC | Oklahoma City, OK 73118 | Oil Operator | Jun 2025 |
| 8 | Calyx Energy III LLC | Tulsa, OK 74136-4226 | Oil & Gas Operator | Jun 2025 |
| 9 | Canaan Petroleum Inc | San Antonio, TX 78230-4042 | Oil & Gas Operator | Jun 2025 |
| 10 | Cane Creek Energy Partners Inc | Morris, OK 74445 | Oil & Gas Operator | Jun 2025 |
| 11 | Canok International Inc | Okmulgee, OK 74447 | Oil & Gas Operator | Jul 2025 |
| 12 | Capmac Inc | Tulsa, OK 74105-7119 | Oil & Gas Operator | Jan 2007 |
| 13 | Cartledge & Cartledge Oil Company Inc | Kiefer, OK 74041 | Oil & Gas Operator | Jun 2025 |
| 14 | Cartledge Energy LLC | Sapulpa, OK 74066-6623 | Oil & Gas Operator | Jul 2025 |
| 15 | Casselman Charles Jack | Okmulgee, OK 74447-4265 | Oil & Gas Operator | Apr 2020 |
| 16 | Casselman Leases LLC | Morris, OK 74445-2509 | Oil & Gas Operator | Jun 2025 |
| 17 | Casselman Ronald H | Morris, OK 74445 | Oil & Gas Operator | Jun 2025 |
| 18 | Casselman-Sheely | Emporia, KS 66801 | Oil & Gas Operator | Oct 2021 |
| 19 | Cayman Resources Corporation | Tulsa, OK 74119-1323 | Oil & Gas Operator | Jun 2001 |
| 20 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Jul 2025 |
| 21 | Central California Oil Co. | Fish Camp, CA 93623 | Oil & Gas Operator | Aug 2025 |
| 22 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Jun 2025 |
| 23 | Cep Mid-Continent LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jun 2025 |
| 24 | Chermac Energy Corporation | Edmond, OK 73083 | Oil & Gas Operator | Apr 2020 |
| 25 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |
| 26 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 27 | Chizum Oil LLC | Wichita, KS 67211 | Oil & Gas Operator | Jun 2025 |
| 28 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 29 | Claborn Julia | Okmulgee, OK 74447-9781 | Oil & Gas Operator | Mar 2022 |
| 30 | Clark Operating Services, Inc. | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 31 | Clemishire, Mark E | | Oil Operator | Jun 2025 |
| 32 | CLV Oil & Gas Inc | Tulsa, OK 74169-0713 | Oil & Gas Operator | Apr 2020 |
| 33 | Coaleum Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jan 2001 |
| 34 | Columbia Production Company | Edmond, OK 73083 | Oil & Gas Operator | May 2020 |
| 35 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 36 | Concorde Resources Corporation | Eufaula, OK 74432 | Oil & Gas Operator | May 2025 |
| 37 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 38 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Oct 2025 |
| 39 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 40 | Cordillera Energy Partners LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 41 | Cornelius Tony | Sapulpa, OK 74066-5845 | Oil & Gas Operator | Apr 2025 |
| 42 | Covenant Oil Corp | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 43 | Cowboy Oil & Gas | Bristow, OK 74010-0057 | Oil & Gas Operator | Jul 2018 |
| 44 | Cowden SR Lester L | Oklahoma City, OK 73118-4011 | Oil & Gas Operator | Sep 1999 |
| 45 | Cox Linda | Bristow, OK 74010-0808 | Oil & Gas Operator | Jan 2018 |
| 46 | Crew B Operating, LLC | Okmulgee, OK 74447 | Oil Operator | Jun 2025 |
| 47 | Crooch John | Okmulgee, OK 74447 | Oil Operator | May 2025 |
| 48 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2025 |
| 49 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 50 | Crown Central Pet Corp | Bellaire, TX 77401 | Oil & Gas Operator | Dec 2016 |
| 51 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 52 | Cudd Operating Corp. | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2020 |
| 53 | Culbreath Oil & Gas Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2025 |
| 54 | Curn Lisa | Steubenville, OH 43952-2535 | Oil Operator | Jun 2025 |
| 55 | CW Investments | Okmulgee, OK 74447-4026 | Oil & Gas Operator | Jun 2025 |
| 56 | Cypress Exploration Company | Tulsa, OK 74132 | Oil & Gas Operator | Jun 2025 |