| 1 | C & C Tank Truck Service Inc | Holdenville, OK 74848 | Oil Operator | Feb 2012 |
| 2 | C & J Trucks LLC | Seminole, OK 74868-5406 | Oil & Gas Operator | Aug 2025 |
| 3 | C & W Oil Inc | | Oil & Gas Operator | Aug 2016 |
| 4 | C H E Company Inc | Shawnee, OK 74801 | Oil Operator | Feb 2012 |
| 5 | C.D. Operating Company, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 6 | Calvert Exploration Co | | Oil & Gas Operator | Apr 1993 |
| 7 | Campbell Don G | Konawa, OK 74849 | Oil Operator | Feb 1997 |
| 8 | Cantrell Energy Corporation | Ada, OK 74820-0835 | Oil & Gas Operator | Jun 2025 |
| 9 | Cantrell Robert R | Ada, OK 74820 | Oil & Gas Operator | Jun 2025 |
| 10 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Jul 2025 |
| 11 | Cap Oil Company | Ada, OK 74820 | Oil Operator | Apr 2025 |
| 12 | Carbon Ridge Energy LLC | Norman, OK 73069 | Oil & Gas Operator | Jun 2025 |
| 13 | Carmac Energy Company LLC | Seminole, OK 74868 | Oil Operator | Jun 2025 |
| 14 | Carmac Energy Corporation | Dallas, TX 75219-2311 | Oil & Gas Operator | Jun 2025 |
| 15 | Carmichael Oil & Gas Company | Vallejo, CA 94591-5653 | Oil & Gas Operator | Apr 2014 |
| 16 | Carney Mark C & Karen M | Dallas, TX 75206-4010 | Oil & Gas Operator | Oct 1994 |
| 17 | Carruth David C Family Trust | Russellville, AR 72811-2061 | Oil Operator | Aug 2002 |
| 18 | Cartledge & Cartledge Oil Company Inc | Kiefer, OK 74041 | Oil & Gas Operator | Jun 2025 |
| 19 | Carver Harry | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 2000 |
| 20 | Castelli Exploration, Inc. | Oklahoma City, OK 73162 | Oil & Gas Operator | Jun 2025 |
| 21 | CDS Oil Company | Tulsa, OK 74147-1514 | Oil & Gas Operator | Mar 2015 |
| 22 | Cenpat Operating LLC | Houston, TX 77042-3044 | Oil & Gas Operator | Jun 2025 |
| 23 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Jun 2025 |
| 24 | CG Oil Co. | San Antonio, TX 78232 | Oil & Gas Operator | Mar 2011 |
| 25 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 2025 |
| 26 | Cher Oil Company LTD | Ripley, OK 74062 | Oil & Gas Operator | Jun 2025 |
| 27 | Chermac Energy Corporation | Edmond, OK 73083 | Oil & Gas Operator | Apr 2020 |
| 28 | Cherokee Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 29 | Cherokee Royalties & Minerals Inc | Duncan, OK 73533 | Oil & Gas Operator | May 2025 |
| 30 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |
| 31 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 32 | Chinn, Velma D | | Oil Operator | Mar 2015 |
| 33 | Circle 9 Resources LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Jun 2025 |
| 34 | Citadel Production Company, Inc. | Denver, CO 80201 | Oil Operator | Sep 1996 |
| 35 | Clark Krista | Ada, OK 74820-8595 | Oil Operator | Sep 2001 |
| 36 | Claybrook Drilling Co Inc | | Oil & Gas Operator | Sep 2014 |
| 37 | Claybrook Production Co. Inc. | Wewoka, OK 74884-1380 | Oil & Gas Operator | Jun 2014 |
| 38 | Cleary Jo Anne | Saint Louis, OK 74866 | Oil Operator | Jun 2025 |
| 39 | Cleere Operating LLC | Shawnee, OK 74804-2610 | Oil Operator | Jun 2025 |
| 40 | Clifton & Associates Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2020 |
| 41 | Cloer VIrgil R | Oklahoma City, OK 73121 | Oil & Gas Operator | Apr 1993 |
| 42 | CM Exploration Company Inc. | | Oil & Gas Operator | Apr 2009 |
| 43 | CMT Oil & Gas Company Inc | Tulsa, OK 74133-6724 | Oil & Gas Operator | Jun 2025 |
| 44 | Coastal Oils Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2013 |
| 45 | Colpitt Brothers Oil | Collinsville, OK 74021 | Oil & Gas Operator | Apr 2020 |
| 46 | Columbus Oil Company | Seminole, OK 74868 | Oil & Gas Operator | Jul 2025 |
| 47 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 48 | Confederate Spooling Inc | Okemah, OK 74859-2409 | Oil & Gas Operator | Apr 2020 |
| 49 | Conner Jelly | Seminole, OK 74868 | Oil & Gas Operator | Mar 1996 |
| 50 | Conner Production Co LLC | Seminole, OK 74868 | Oil & Gas Operator | Jun 2025 |
| 51 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 52 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 53 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 54 | Consolidated Production Inc. | Seminole, OK 74868 | Oil & Gas Operator | Jun 2025 |
| 55 | Consolidated Properties | Tulsa, OK 74129 | Oil & Gas Operator | Jan 2017 |
| 56 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Oct 2025 |
| 57 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 58 | Cook Oil Company | Wewoka, OK 74884 | Oil & Gas Operator | Sep 2015 |
| 59 | Cook William Glenn | Wewoka, OK 74884-0727 | Oil & Gas Operator | Nov 2000 |
| 60 | Cooper John T | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 61 | Cooper Oil Inc | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 62 | Cornelius Petroleum Inc | | Oil & Gas Operator | Jul 2025 |
| 63 | Cougar Energy Investment LLC | Spring, TX 77387-7277 | Oil & Gas Operator | Sep 2014 |
| 64 | CPRP Services LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Jul 2025 |
| 65 | Criswell Energy LLC | Montezuma, IA 50171-8500 | Oil & Gas Operator | Oct 2022 |
| 66 | Cross, Don E | | Oil & Gas Operator | Jan 2013 |
| 67 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Jun 2025 |
| 68 | Crystal Energy Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2019 |
| 69 | Cuesta Petroleum Inc | Shawnee, OK 74801-6963 | Oil & Gas Operator | Jun 2025 |
| 70 | Cumberland Operating Company | Seminole, OK 74868-1258 | Oil & Gas Operator | Mar 2007 |
| 71 | Cummins Wren Oil Company | Tulsa, OK 74135 | Oil & Gas Operator | Nov 1998 |
| 72 | CWB Energy Inc | Oklahoma City, OK 73139-8837 | Oil Operator | May 2000 |