| 1 | C & B Energy Resources | Bartlesville, OK 74006 | Oil & Gas Operator | Mar 2015 |
| 2 | C & C Tank Truck Service Inc | Holdenville, OK 74848 | Oil Operator | Feb 2012 |
| 3 | C & W Oil Inc | | Oil & Gas Operator | Aug 2016 |
| 4 | C & W Operating LLC | Tulsa, OK 74145-7627 | Oil Operator | May 2020 |
| 5 | C Bar K Enterprises Inc | Oklahoma City, OK 73154-1828 | Oil & Gas Operator | Dec 2022 |
| 6 | C E D LC | Enid, OK 73702-0326 | Oil & Gas Operator | Oct 2021 |
| 7 | Cactus Oil & Gas LLC | Seminole, OK 74868-2430 | Oil & Gas Operator | Mar 2018 |
| 8 | Calyx Energy III LLC | Tulsa, OK 74136-4226 | Oil & Gas Operator | Jan 2026 |
| 9 | Canaan Resources LLC | Oklahoma City, OK 73118-1126 | Gas Operator | Oct 2023 |
| 10 | Canaan Resources X LLC | Oklahoma City, OK 73103-4925 | Oil & Gas Operator | Sep 2024 |
| 11 | Cantrell Energy Corporation | Ada, OK 74820-0835 | Oil & Gas Operator | Feb 2026 |
| 12 | Canvas Energy LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2026 |
| 13 | Canyon Creek Energy Operating LLC | Tulsa, OK 74120 | Oil & Gas Operator | Feb 2026 |
| 14 | Cap Oil Company | Ada, OK 74820 | Oil Operator | Jan 2026 |
| 15 | Capataz Operating Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2020 |
| 16 | Cardinal Oil LLC | Drumright, OK 74030 | Oil & Gas Operator | Feb 2026 |
| 17 | Carlson Petroleum Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 18 | Carlton, Richard L | | Oil & Gas Operator | Aug 1999 |
| 19 | Carmac Energy Corporation | Dallas, TX 75219-2311 | Oil & Gas Operator | Feb 2026 |
| 20 | Carmichael Oil & Gas Company | Vallejo, CA 94591-5653 | Oil & Gas Operator | Apr 2014 |
| 21 | Cartledge & Cartledge Oil Company Inc | Kiefer, OK 74041 | Oil & Gas Operator | Feb 2026 |
| 22 | Carver Harry | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 2000 |
| 23 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Feb 2026 |
| 24 | Cei Operating LLC | Katy, TX 77449 | Oil & Gas Operator | May 2026 |
| 25 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2026 |
| 26 | CH4 Production Company Inc | Tulsa, OK 74170-1955 | Gas Operator | May 2007 |
| 27 | Chapman Exploration Inc | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2013 |
| 28 | Charro Operating, L.L.C. | Englewood, CO 80112 | Oil & Gas Operator | May 2026 |
| 29 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2026 |
| 30 | Chastain Diane | Coffeyville, KS 67337-9620 | Oil & Gas Operator | Feb 2015 |
| 31 | Chastain Land & Energy LLC | Wetumka, OK 74883-0067 | Oil & Gas Operator | Sep 2017 |
| 32 | Chermac Energy Corporation | Edmond, OK 73083 | Oil & Gas Operator | Apr 2020 |
| 33 | Cherokee Royalties & Minerals Inc | Duncan, OK 73533 | Oil & Gas Operator | Nov 2025 |
| 34 | Cherry, William H., Inc. | Oklahoma City, OK 73125 | Oil & Gas Operator | Mar 2015 |
| 35 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2026 |
| 36 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2026 |
| 37 | Chiles Jack Well Service | Atwood, OK 74827-0373 | Oil Operator | Apr 2014 |
| 38 | Chiles Robert Morris | Allen, OK 74825 | Oil Operator | Dec 2025 |
| 39 | Chisholm Oil And Gas Operating LLC | Tulsa, OK 74103-3522 | Oil & Gas Operator | Feb 2026 |
| 40 | Cimarron Oil & Gas Inc | Perry, OK 73077-1318 | Oil & Gas Operator | Sep 2000 |
| 41 | Cimarron Production Co Inc | Oklahoma City, OK 73142-3017 | Oil & Gas Operator | Jan 2026 |
| 42 | Circle C Oilfield Supply Inc | Wetumka, OK 74883-0068 | Oil & Gas Operator | Apr 2017 |
| 43 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | May 2026 |
| 44 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Dec 2025 |
| 45 | Claybrook Production Co. Inc. | Wewoka, OK 74884-1380 | Oil & Gas Operator | Jun 2014 |
| 46 | Cleary Exploration LLC | Oklahoma City, OK 73112-7221 | Oil & Gas Operator | Oct 2014 |
| 47 | CM Exploration Company Inc. | | Oil & Gas Operator | Apr 2009 |
| 48 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2026 |
| 49 | Cola Resources LLC | Houston, TX 77019-5639 | Gas Operator | Nov 2015 |
| 50 | Columbus Oil Company | Seminole, OK 74868 | Oil & Gas Operator | Feb 2026 |
| 51 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 52 | Concorde Resources Corporation | Eufaula, OK 74432 | Oil & Gas Operator | Jan 2026 |
| 53 | Confederate Spooling Inc | Okemah, OK 74859-2409 | Oil & Gas Operator | Apr 2020 |
| 54 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | May 2026 |
| 55 | Consolidated Resources Corp | Shawnee, OK 74801 | Oil & Gas Operator | Sep 2014 |
| 56 | Continental Oil & Refining Co | Catoosa, OK 74015-0831 | Oil & Gas Operator | Feb 2026 |
| 57 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | May 2026 |
| 58 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | May 2026 |
| 59 | Cook Oil Company | Wewoka, OK 74884 | Oil & Gas Operator | Sep 2015 |
| 60 | Cook William Glenn | Wewoka, OK 74884-0727 | Oil & Gas Operator | Nov 2000 |
| 61 | Cornerstone E & P Company LP | Irving, TX 75038 | Oil & Gas Operator | Nov 2010 |
| 62 | Corterra Energy Operating LLC | Tulsa, OK 74119-4844 | Oil & Gas Operator | Aug 2021 |
| 63 | Cougar Energy Investment LLC | Spring, TX 77387-7277 | Oil & Gas Operator | Sep 2014 |
| 64 | Cox Edwin L & R Berry | Dallas, TX 75202 | Oil & Gas Operator | Apr 2015 |
| 65 | Cox Elmer N | Irving, TX 75181 | Oil Operator | Aug 2013 |
| 66 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 67 | Criswell Energy LLC | Montezuma, IA 50171-8500 | Oil & Gas Operator | Oct 2022 |
| 68 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2026 |
| 69 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Feb 2026 |
| 70 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 71 | Crystal Energy Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2019 |
| 72 | Cudd Operating Corp | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2020 |
| 73 | Cuesta Petroleum Inc | Shawnee, OK 74801-6963 | Oil & Gas Operator | Jan 2026 |
| 74 | Culbreath Oil & Gas Co Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jan 2026 |
| 75 | Culp & Copple Oil Company | Cushing, OK 74023 | Oil & Gas Operator | Feb 2026 |
| 76 | Curzon Operating Company LTD | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Jan 2026 |
| 77 | Cyanostar Energy Inc | Tulsa, OK 74103-4122 | Oil & Gas Operator | Feb 1999 |
| 78 | Cypress Exploration Company | Tulsa, OK 74132 | Oil & Gas Operator | Jan 2026 |