| 1 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Oct 2025 |
| 2 | C & W Oil Inc | | Oil & Gas Operator | Aug 2016 |
| 3 | C D Operating Company Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 4 | C E L Inc | Bartlesville, OK 74006 | Oil & Gas Operator | Jan 2020 |
| 5 | Cactus Oil & Gas LLC | Seminole, OK 74868-2430 | Oil & Gas Operator | Mar 2018 |
| 6 | Callie Oil Company LLC | Perry, OK 73077 | Oil & Gas Operator | Oct 2025 |
| 7 | Callon Petroleum Company | Natchez, MS 39120 | Oil & Gas Operator | Jan 2000 |
| 8 | Campbell Don G | Konawa, OK 74849 | Oil Operator | Feb 1997 |
| 9 | Cannon Operating Company LLC | Garland, TX 75043 | Oil Operator | Dec 2025 |
| 10 | Cantrell Energy Corporation | Ada, OK 74820-0835 | Oil & Gas Operator | Oct 2025 |
| 11 | Cantrell Robert R | Ada, OK 74820 | Oil & Gas Operator | Sep 2025 |
| 12 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Oct 2025 |
| 13 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | Oct 2025 |
| 14 | Capmac Inc | Tulsa, OK 74105-7119 | Oil & Gas Operator | Jan 2007 |
| 15 | Carbon Ridge Energy LLC | Norman, OK 73069 | Oil & Gas Operator | Oct 2025 |
| 16 | Carmac Energy Corporation | Dallas, TX 75219-2311 | Oil & Gas Operator | Sep 2025 |
| 17 | Carmen Field LP | Tulsa, OK 74135 | Oil & Gas Operator | Mar 2008 |
| 18 | Carney Mark C & Karen M | Dallas, TX 75206-4010 | Oil & Gas Operator | Oct 1994 |
| 19 | Carver Harry | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 2000 |
| 20 | CBL Resources LLC | Tulsa, OK 74136-6308 | Oil & Gas Operator | Oct 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 | Sep 2025 |
| 23 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2025 |
| 24 | Centurion Oilfield Services LLC | Burneyville, OK 73430 | Oil & Gas Operator | Oct 2025 |
| 25 | Challenge Operating Inc | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 26 | Chapman Elise P Estate | | Oil & Gas Operator | Mar 2020 |
| 27 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Dec 2025 |
| 28 | Cherokee Royalties & Minerals Inc | Duncan, OK 73533 | Oil & Gas Operator | Sep 2025 |
| 29 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 30 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 31 | Cimarron Petroleum Corporation | Houston, TX 77057-2696 | Oil & Gas Operator | Sep 2025 |
| 32 | Circle 9 Resources LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Oct 2025 |
| 33 | Cirrus Production Company | Enid, OK 73702 | Oil & Gas Operator | Oct 2025 |
| 34 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Dec 2025 |
| 35 | Claremont Corporation | Tulsa, OK 74114 | Oil & Gas Operator | Feb 2017 |
| 36 | Claremont Exploration Inc | Tulsa, OK 74103-4107 | Oil & Gas Operator | Jun 1997 |
| 37 | Claybrook Drilling Co Inc | | Oil & Gas Operator | Sep 2014 |
| 38 | Claybrook Production Co. Inc. | Wewoka, OK 74884-1380 | Oil & Gas Operator | Jun 2014 |
| 39 | Cleary Exploration LLC | Oklahoma City, OK 73112-7221 | Oil & Gas Operator | Oct 2014 |
| 40 | Cleary Jo Anne | Saint Louis, OK 74866 | Oil Operator | Jun 2025 |
| 41 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |
| 42 | Clifton & Associates Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2020 |
| 43 | CLV Oil & Gas Inc | Tulsa, OK 74169-0713 | Oil & Gas Operator | Apr 2020 |
| 44 | CM Oil Co. | FT Stockton, TX 79735 | Oil & Gas Operator | Dec 2025 |
| 45 | CMS Energy Inc | Dallas, TX 75287 | Oil & Gas Operator | Oct 2025 |
| 46 | Columbus Oil Company | Seminole, OK 74868 | Oil & Gas Operator | Oct 2025 |
| 47 | Comanche Petroleum Corporation | Oklahoma City, OK 73179 | Oil & Gas Operator | Apr 2024 |
| 48 | Compass Drilling Inc | Enid, OK 73702-5467 | Oil & Gas Operator | Sep 2014 |
| 49 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 50 | Conner Jelly | Seminole, OK 74868 | Oil & Gas Operator | Mar 1996 |
| 51 | Conner Production Co LLC | Seminole, OK 74868 | Oil & Gas Operator | Aug 2025 |
| 52 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 53 | Consolidated Production Inc. | Seminole, OK 74868 | Oil & Gas Operator | Aug 2025 |
| 54 | Consolidated Properties | Tulsa, OK 74129 | Oil & Gas Operator | Jan 2017 |
| 55 | Consolidated Resources Corp | Shawnee, OK 74801 | Oil & Gas Operator | Sep 2014 |
| 56 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Dec 2025 |
| 57 | Cook Oil Company | Wewoka, OK 74884 | Oil & Gas Operator | Sep 2015 |
| 58 | Cooper John T | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 59 | Cooper Oil Inc | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 60 | Cordillera Energy Partners II LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Aug 2025 |
| 61 | Cousins Exploration Co | Wichita Falls, TX 76307 | Oil Operator | Jun 1991 |
| 62 | Crescent Exploration, LLC | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 63 | Crown Consulting Inc | Liberal, KS 67905 | Oil & Gas Operator | Jun 2025 |
| 64 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2025 |
| 65 | Cuesta Petroleum Inc | Shawnee, OK 74801-6963 | Oil & Gas Operator | Sep 2025 |
| 66 | Culbreath Oil & Gas Co Inc | Tulsa, OK 74135 | Oil & Gas Operator | Oct 2025 |
| 67 | CVR Supply & Trading, LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |