| 1 | C & D Drilling Company | Hennepin, OK 73046 | Oil & Gas Operator | Mar 2007 |
| 2 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Feb 2024 |
| 3 | C & R Petroleum Co. | Duncan, OK 73533-1341 | Oil & Gas Operator | Feb 2024 |
| 4 | C & Y Casing Pulling Company | Duncan, OK 73534-0037 | Oil & Gas Operator | Feb 2024 |
| 5 | C E Harmon Oil Inc | Tulsa, OK 74136-6559 | Oil & Gas Operator | Feb 2024 |
| 6 | Cain Randy A | Duncan, OK 73529 | Oil & Gas Operator | Feb 2024 |
| 7 | Cain Richard | Comanche, OK 73529-1248 | Oil & Gas Operator | May 2020 |
| 8 | Calumet Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2019 |
| 9 | Camino Natural Resources LLC | | Oil & Gas Operator | Mar 2024 |
| 10 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 11 | Cantrell Energy Corporation | Ada, OK 74820-0835 | Oil & Gas Operator | Jan 2024 |
| 12 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Mar 2024 |
| 13 | Capstone Oilfield Disposal Service LLC | Hennessey, OK 73742-0698 | Oil Operator | Dec 2019 |
| 14 | Carl E Gungoll Exploration Inc | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Jan 2016 |
| 15 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2024 |
| 16 | Carter County Salt Water Disposal Inc | Wilson, OK 73463-0028 | Oil Operator | Dec 2023 |
| 17 | Carter Preston Drilling Co | Davis, OK 73030 | Gas Operator | Nov 2000 |
| 18 | Casey David | Hennepin, OK 73046 | Oil Operator | Jan 2024 |
| 19 | Casillas Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 20 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Feb 2024 |
| 21 | Cates Betty J | Tulsa, OK 74112 | Oil & Gas Operator | Nov 2016 |
| 22 | Cathey Production Company | Ryan, OK 73565-0485 | Oil Operator | Dec 2010 |
| 23 | Caulkins Oil Company | Aztec, NM 87410 | Oil & Gas Operator | Dec 2023 |
| 24 | Cement Oil Company | Cement, OK 73017-9234 | Oil & Gas Operator | Feb 2024 |
| 25 | Central Ok Reclamation LLC | | Oil & Gas Operator | Jun 2014 |
| 26 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2024 |
| 27 | Chapman Oil Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2024 |
| 28 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2024 |
| 29 | Chatham John | Wilson, OK 73463-9575 | Oil Operator | Feb 2014 |
| 30 | Chatham Verdell | Ratliff City, OK 73081-0061 | Oil Operator | Oct 2009 |
| 31 | Chatham VIckie R | Wilson, OK 73463-6510 | Oil Operator | Feb 2024 |
| 32 | Chatham, Maxine | | Oil Operator | Oct 2016 |
| 33 | Cherokee Royalties & Minerals Inc | Duncan, OK 73534-0415 | Oil & Gas Operator | Jan 2024 |
| 34 | Chesapeake Energy MKT Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2022 |
| 35 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2024 |
| 36 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 37 | Chica Oil Company | Lago VIsta, TX 78645-6561 | Oil & Gas Operator | Mar 2001 |
| 38 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 39 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 40 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Apr 2024 |
| 41 | Citizen Energy III LLC | | Oil & Gas Operator | Mar 2024 |
| 42 | Clark And Clark | Princeton, NJ 08540-1930 | Oil & Gas Operator | Jul 2013 |
| 43 | Cobalt Environmental Solutions LLC | | Oil Operator | Jun 2019 |
| 44 | Coho Oil & Gas Inc | Coppell, TX 75019-8288 | Oil & Gas Operator | Mar 2015 |
| 45 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 46 | Complete Energy Services LLC | Oklahoma City, OK 73142-3326 | Oil Operator | Aug 2022 |
| 47 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 48 | Concord Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2021 |
| 49 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 50 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 51 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Apr 2024 |
| 52 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 53 | Corley Production Company | Wilson, OK 73463-7218 | Oil Operator | Feb 2024 |
| 54 | Corley Production Inc | Comanche, OK 73529-4668 | Oil Operator | Mar 2015 |
| 55 | Corner Energy LLC | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Mar 2015 |
| 56 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 57 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
| 58 | Council Oak Resources LLC | | Oil & Gas Operator | Jan 2024 |
| 59 | Cox Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1999 |
| 60 | Cox Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2014 |
| 61 | CRD Investments LLC | | Oil Operator | Feb 2024 |
| 62 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2023 |
| 63 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 64 | Crude Marketing & Trans Inc | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2017 |
| 65 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 66 | Crusader Energy Group LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2015 |
| 67 | Crusader Energy III LLC | Oklahoma City, OK 73142-1856 | Oil & Gas Operator | Feb 2011 |