| 1 | C & H Oil Company | Ratliff City, OK 73481-0130 | Oil & Gas Operator | Apr 2015 |
| 2 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Mar 2024 |
| 3 | C & S Exploration Inc | | Oil & Gas Operator | Jun 2016 |
| 4 | C B Energy Resources | Bartlesville, OK 74006 | Oil & Gas Operator | Mar 2015 |
| 5 | Calyx Energy III LLC | | Oil & Gas Operator | Feb 2024 |
| 6 | Campbell Production Company | Tulsa, OK 74137-4145 | Oil & Gas Operator | Mar 2015 |
| 7 | Canaan Resources LLC | Oklahoma City, OK 73118-1126 | Gas Operator | Oct 2023 |
| 8 | Canaan Resources X LLC | Oklahoma City, OK 73103-4925 | Oil & Gas Operator | Feb 2024 |
| 9 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Mar 2024 |
| 10 | Capmac Inc | Tulsa, OK 74105-7119 | Oil & Gas Operator | Jan 2007 |
| 11 | Capstone Oilfield Disposal Service LLC | Hennessey, OK 73742-0698 | Oil Operator | Dec 2019 |
| 12 | Carl E Gungoll Exploration Inc | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Jan 2016 |
| 13 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2024 |
| 14 | Carlson Petroleum Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 15 | Cates Betty J | Tulsa, OK 74112 | Oil & Gas Operator | Nov 2016 |
| 16 | CB Oil Company | Drumright, OK 74030-0176 | Oil & Gas Operator | Mar 2024 |
| 17 | Cei Petroleum Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Jul 2016 |
| 18 | Central Ok Reclamation LLC | | Oil & Gas Operator | Jun 2014 |
| 19 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2024 |
| 20 | Cewell Energy LLC | | Oil & Gas Operator | Feb 2024 |
| 21 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Mar 2024 |
| 22 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2024 |
| 23 | Chesapeake Energy MKT Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2022 |
| 24 | Chesapeake Exploration LLC | Oklahoma City, OK 731540496 | Oil & Gas Operator | Jul 2020 |
| 25 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2024 |
| 26 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 27 | Cheyenne Petroleum Company | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2024 |
| 28 | Choctaw Gas Company | Quinton, OK 74561-0660 | Gas Operator | Feb 2024 |
| 29 | Cima Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2022 |
| 30 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 31 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 32 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | May 2024 |
| 33 | Cities Services Company | | Oil & Gas Operator | Mar 2008 |
| 34 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 35 | Cleveland Rod & Tracy | | Oil & Gas Operator | Jul 2023 |
| 36 | CM Exploration Company Inc. | | Oil & Gas Operator | Apr 2009 |
| 37 | Coaleum Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jan 2001 |
| 38 | Cola Resources LLC | Houston, TX 77019-5639 | Gas Operator | Nov 2015 |
| 39 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 40 | Concorde Resource Corporation | Eufaula, OK 74432-0841 | Oil & Gas Operator | Feb 2024 |
| 41 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 42 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 43 | Continental Gas Inc | Enid, OK 73702-5103 | Oil & Gas Operator | Apr 2012 |
| 44 | Continental Natural Gas, Inc. | Tulsa, OK 74121 | Oil & Gas Operator | Jun 2018 |
| 45 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | May 2024 |
| 46 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | May 2024 |
| 47 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 48 | Cordillera Energy Partners LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 49 | Corman, Jack | Dallas, TX 75231 | Oil & Gas Operator | May 2022 |
| 50 | Corterra Energy Operating LLC | | Oil & Gas Operator | Aug 2021 |
| 51 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 52 | County Line Stripper Wells LLC | | Oil & Gas Operator | Feb 2024 |
| 53 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |
| 54 | Cox Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2014 |
| 55 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | May 2024 |
| 56 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2024 |
| 57 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 58 | Crow Creek Operating Co III LLC | | Oil & Gas Operator | Apr 2015 |
| 59 | Crude Marketing & Trans Inc | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2017 |
| 60 | Cyanostar Energy, Inc | Tulsa, OK 74103-4122 | Oil & Gas Operator | Sep 2001 |