| 1 | C & J Exploration LLC | Colorado Springs, CO 80920-3946 | Oil & Gas Operator | Oct 2022 |
| 2 | C & R Petroleum Company | Duncan, OK 73533-1341 | Oil & Gas Operator | Dec 2025 |
| 3 | C & Y Casing Pulling Company | Duncan, OK 73533 | Oil & Gas Operator | Feb 2026 |
| 4 | C D Operating Company Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 5 | C E D LC | Enid, OK 73702-0326 | Oil & Gas Operator | Oct 2021 |
| 6 | C E Harmon Oil Inc | Tulsa, OK 74136-6559 | Oil & Gas Operator | Feb 2026 |
| 7 | C F & L Producing Co | | Oil & Gas Operator | Sep 2000 |
| 8 | Cain Randy A | Duncan, OK 73533 | Oil & Gas Operator | Jan 2026 |
| 9 | Cain Richard | Comanche, OK 73529-1248 | Oil & Gas Operator | May 2020 |
| 10 | Calpine Natural Gas Company L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 11 | Camino Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 12 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 13 | Canvas Energy LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2026 |
| 14 | Canyon Creek Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2026 |
| 15 | Caprock, Inc. | Ralls, TX 79357 | Oil & Gas Operator | Mar 2013 |
| 16 | Carmen Field LP | Tulsa, OK 74135 | Oil & Gas Operator | Mar 2008 |
| 17 | Casillas Operating LLC | Tulsa, OK 74103-4060 | Oil & Gas Operator | Jan 2026 |
| 18 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Feb 2026 |
| 19 | Castle Operating LLC | Oklahoma City, OK 73114-7444 | Oil & Gas Operator | Jan 2026 |
| 20 | Cathey Production Company | Ryan, OK 73565-0485 | Oil Operator | Dec 2010 |
| 21 | Caulkins Oil Company | Aztec, NM 87410 | Oil & Gas Operator | Oct 2024 |
| 22 | Cement Oil Company | Cement, OK 73017-9234 | Oil & Gas Operator | Dec 2025 |
| 23 | CFC Oil Inc | Cyril, OK 73029-5601 | Oil & Gas Operator | Dec 2025 |
| 24 | Chance Oil Co., Inc. | Vernon, TX 76385 | Oil & Gas Operator | Feb 2026 |
| 25 | Chapman Jim | Bristow, OK 74010-1173 | Oil Operator | Apr 2021 |
| 26 | Chapman Oil Company | Midland, TX 79702 | Oil & Gas Operator | Jan 2026 |
| 27 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2026 |
| 28 | Chastain Diane | Coffeyville, KS 67337-9620 | Oil & Gas Operator | Feb 2015 |
| 29 | Chatham Verdell | Ratliff City, OK 73081-0061 | Oil Operator | Oct 2009 |
| 30 | Cherokee Royalties & Minerals Inc | Duncan, OK 73533 | Oil & Gas Operator | Nov 2025 |
| 31 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2026 |
| 32 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 33 | Cheyenne Petroleum Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2026 |
| 34 | Chica Oil Company | Lago VIsta, TX 78645-6561 | Oil & Gas Operator | Mar 2001 |
| 35 | Chisum G H | Duncan, OK 73533 | Oil & Gas Operator | Dec 2010 |
| 36 | Christie Jr C B | Wichita Falls, TX 76308-4873 | Oil & Gas Operator | May 2024 |
| 37 | Cigna Energy Resources Inc | Englewood, CO 80155-5038 | Oil Operator | Nov 1998 |
| 38 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 39 | Cimarron Operating Company | Oklahoma City, OK 73112-3967 | Oil & Gas Operator | May 2011 |
| 40 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Apr 2026 |
| 41 | Citizen Energy III LLC | Devner, CO 80202 | Oil & Gas Operator | Jan 2026 |
| 42 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |
| 43 | CLV Oil & Gas Inc | Tulsa, OK 74169-0713 | Oil & Gas Operator | Apr 2020 |
| 44 | Coaleum Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jan 2001 |
| 45 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 46 | Coastal Oils Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2013 |
| 47 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Apr 2026 |
| 48 | Coastal States Gas Prod Co | | Oil & Gas Operator | Jun 1996 |
| 49 | Cobopco Inc | Tulsa, OK 74103-4391 | Oil & Gas Operator | Feb 1997 |
| 50 | Coenergy Operating Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 51 | Coho Oil & Gas Inc | Coppell, TX 75019-8288 | Oil & Gas Operator | Mar 2015 |
| 52 | Coleman Oil LLC | Marlow, OK 73055 | Oil Operator | Nov 2021 |
| 53 | Collins Petroleum Inc | Bartlesville, OK 74006-7024 | Oil & Gas Operator | Apr 2005 |
| 54 | Colonial Energy Company Inc | Garland, TN 75045 | Oil & Gas Operator | Apr 2015 |
| 55 | Colpitt Brothers Oil | Collinsville, OK 74021 | Oil & Gas Operator | Apr 2020 |
| 56 | Colt Resources Corporation | Billings, MT 59103 | Oil & Gas Operator | Feb 2013 |
| 57 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 58 | Combined Resources Corporation | Edmond, OK 73083 | Oil & Gas Operator | Apr 2026 |
| 59 | Comet Oil Company | Velma, OK 73091 | Oil & Gas Operator | May 2005 |
| 60 | Comet-Haines Oil Company | Sulphur, OK 73086-0546 | Oil & Gas Operator | Mar 2013 |
| 61 | Compadre Drilling & Expl Corp | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2015 |
| 62 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 63 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 64 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 65 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 66 | Continental Exploration LLC | Richardson, TX 75080 | Oil & Gas Operator | Apr 2026 |
| 67 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Apr 2026 |
| 68 | Cooper Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2026 |
| 69 | Cordillera Energy Partners II LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Jan 2026 |
| 70 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 71 | Corley Production Inc | Comanche, OK 73529-4668 | Oil Operator | Mar 2015 |
| 72 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 73 | Coterra Energy Operating Co. | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 74 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
| 75 | Couch Donald W | Marlow, OK 73055 | Oil & Gas Operator | Feb 2026 |
| 76 | Countyline Production Co LLC | Duncan, OK 73533 | Oil Operator | Dec 2025 |
| 77 | Cowboy Operating LLC | Oklahoma City, OK 73120 | Oil Operator | Jan 2026 |
| 78 | Cox Edwin L & R Berry | Dallas, TX 75202 | Oil & Gas Operator | Apr 2015 |
| 79 | Cox Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1999 |
| 80 | Cox Oil & Gas Inc | Dallas, TX 75201 | Oil & Gas Operator | Mar 2014 |
| 81 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2026 |
| 82 | CRD Investments LLC | Duncan, OK 73533-4226 | Oil Operator | Dec 2025 |
| 83 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2026 |
| 84 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 85 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 86 | Crown Petroleum Company | Duncan, OK 73534-0938 | Oil & Gas Operator | Jan 2011 |
| 87 | Cummings Oil Company | Oklahoma City, OK 73112-6113 | Oil & Gas Operator | Feb 2026 |
| 88 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |