| 1401 | Courson, Harold D. | Perryton, TX 79070 | Oil & Gas Operator | Aug 1998 |
| 1402 | Cousins Exploration Co | Wichita Falls, TX 76307 | Oil Operator | Jun 1991 |
| 1403 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |
| 1404 | Covenant Oil Corp | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 1405 | Covington Oil Company Inc | Nichols Hills, OK 73116 | Oil & Gas Operator | Nov 2025 |
| 1406 | Cow Creek Resources Inc | Ponca City, OK 74601-7815 | Oil & Gas Operator | Nov 2025 |
| 1407 | Cowboy Oil & Gas | Bristow, OK 74010-0057 | Oil & Gas Operator | Jul 2018 |
| 1408 | Cowboy Operating LLC | Oklahoma City, OK 73120 | Oil Operator | Nov 2025 |
| 1409 | Cowden SR Lester L | Oklahoma City, OK 73118-4011 | Oil & Gas Operator | Sep 1999 |
| 1410 | Cowles James C | Muskogee, OK 74401-5262 | Oil Operator | Sep 2025 |
| 1411 | Cox Edwin L & R Berry | Dallas, TX 75202 | Oil & Gas Operator | Apr 2015 |
| 1412 | Cox Elmer N | Irving, TX 75181 | Oil Operator | Aug 2013 |
| 1413 | Cox Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1999 |
| 1414 | Cox Gas Corporation | Dallas, TX 75201-7306 | Oil & Gas Operator | Apr 2015 |
| 1415 | Cox Linda | Bristow, OK 74010-0808 | Oil & Gas Operator | Jan 2018 |
| 1416 | Cox Oil & Gas Inc | Dallas, TX 75201 | Oil & Gas Operator | Mar 2014 |
| 1417 | Cox P D Inc | Bristow, OK 74010 | Oil & Gas Operator | May 1993 |
| 1418 | Cox Resources Corporation | Dallas, TX 75244 | Oil & Gas Operator | Mar 2015 |
| 1419 | Cox Robert L | Blackwell, OK 74631 | Oil & Gas Operator | Oct 2025 |
| 1420 | Cox, Gary L | | Oil Operator | Mar 2022 |
| 1421 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 1422 | CPRC Inc | Tulsa, OK 74103-5037 | Oil & Gas Operator | Apr 1997 |
| 1423 | CPRP Services LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Sep 2025 |
| 1424 | Crabtree Barbara T | Forney, TX 75126-5818 | Oil & Gas Operator | Oct 2024 |
| 1425 | Craft & Craft Productions LLC | | Oil Operator | May 2025 |
| 1426 | Craig Elder Oil And Gas LLC | Edmond, OK 73013 | Oil & Gas Operator | Oct 2025 |
| 1427 | Crain & Deisenroth | Tulsa, OK 74103-4433 | Oil & Gas Operator | Mar 2015 |
| 1428 | Crain & Deisenroth LLC | Tulsa, OK 74104-6511 | Oil & Gas Operator | Apr 2014 |
| 1429 | Crain Minerals LLC | Oklahoma City, OK 73120-1004 | Oil & Gas Operator | Aug 2014 |
| 1430 | Cramer Oil LLC | Nowata, OK 74048-6011 | Oil Operator | Oct 2025 |
| 1431 | Crasco Oil Company | Tulsa, OK 74120 | Oil Operator | Nov 1998 |
| 1432 | Craw Operating LLC | Mooreland, OK 73852 | Oil & Gas Operator | Oct 2025 |
| 1433 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 1434 | CRB Resources Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Oct 2025 |
| 1435 | CRD Investments LLC | Duncan, OK 73533-4226 | Oil Operator | Oct 2025 |
| 1436 | Creede Oil & Gas Company | Oklahoma City, OK 73102-7502 | Oil & Gas Operator | Jun 2006 |
| 1437 | Creek Ellis | Haskell, OK 74436 | Oil & Gas Operator | Mar 2012 |
| 1438 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | Oct 2025 |
| 1439 | Crescent Exploration, LLC | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 1440 | Creslenn Oil Co | | Oil & Gas Operator | Nov 1998 |
| 1441 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 1442 | Crew B Operating, LLC | Okmulgee, OK 74447 | Oil Operator | Oct 2025 |
| 1443 | Cricket Enterprises Corporation | Nowata, OK 74048-9683 | Oil & Gas Operator | Mar 2015 |
| 1444 | Cricket Petroleum | Tulsa, OK 74146 | Oil & Gas Operator | Dec 2016 |
| 1445 | Criswell Energy LLC | Montezuma, IA 50171-8500 | Oil & Gas Operator | Oct 2022 |
| 1446 | CRM Energy Partners | | Oil & Gas Operator | Oct 2025 |
| 1447 | Cromer Carroll Oil & Gas LLC | Kalispell, MT 59901 | Oil & Gas Operator | Oct 2025 |
| 1448 | Crooch John | Okmulgee, OK 74447 | Oil Operator | Sep 2025 |
| 1449 | Cross Don | Cushing, OK 74023-6316 | Oil & Gas Operator | Feb 2022 |
| 1450 | Cross Timbers Oil Company | Dallas, TX 75284 | Oil & Gas Operator | May 2013 |
| 1451 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2025 |
| 1452 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 1453 | Cross, Don E | | Oil & Gas Operator | Jan 2013 |
| 1454 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 1455 | Crow Creek Operating Co III LLC | Tulsa, OK 74137-8432 | Oil & Gas Operator | Apr 2015 |
| 1456 | Crow Oil LLC | Tulsa, OK 74133-2914 | Oil & Gas Operator | Sep 2019 |
| 1457 | Crown Central Pet Corp | Bellaire, TX 77401 | Oil & Gas Operator | Dec 2016 |
| 1458 | Crown Consulting Inc | Liberal, KS 67905 | Oil & Gas Operator | Sep 2025 |
| 1459 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Oct 2025 |
| 1460 | Crown Natural Gas Inc | Silver City, NM 88061-9350 | Gas Operator | Sep 2014 |
| 1461 | Crown Petroleum Company | Duncan, OK 73534-0938 | Oil & Gas Operator | Jan 2011 |
| 1462 | Crude Oil Recovery Inc /Osage Only | | Oil & Gas Operator | Mar 2006 |
| 1463 | Crude Resources | Sapulpa, OK 74066 | Oil & Gas Operator | Mar 2008 |
| 1464 | Crumpton H A | Duncan, OK 73533 | Oil Operator | Dec 2002 |
| 1465 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 1466 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 1467 | Crusader Energy Group LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2015 |
| 1468 | Crusader Energy II LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 1469 | Crusader Energy III LLC | Oklahoma City, OK 73142-1856 | Oil & Gas Operator | Feb 2011 |
| 1470 | Crusher Oil Company | Ponca City, OK 74604-5612 | Oil Operator | Apr 2017 |
| 1471 | Cruzen Drilling Company Inc | Cleveland, OK 74020-0470 | Oil Operator | Nov 2014 |
| 1472 | Crystal Energy Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2019 |
| 1473 | Csoda Operating Company LLC | Amarillo, TX 79114-7506 | Oil & Gas Operator | Aug 2021 |
| 1474 | CSX Oil & Gas Corporation | Houston, TX 77210-4326 | Oil & Gas Operator | Mar 1993 |
| 1475 | Cudd Operating Corp | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2020 |
| 1476 | Cuesta Petroleum Inc | Shawnee, OK 74801-6963 | Oil & Gas Operator | Oct 2025 |
| 1477 | Culbreath Oil & Gas Co Inc | Tulsa, OK 74135 | Oil & Gas Operator | Nov 2025 |
| 1478 | Culebra Oil & Gas, LLC | Kerrville, TX 78028 | Oil & Gas Operator | Dec 2025 |
| 1479 | Culp & Copple Oil Company | Cushing, OK 74023 | Oil & Gas Operator | Aug 2025 |
| 1480 | Cumberland Operating Company | Seminole, OK 74868-1258 | Oil & Gas Operator | Mar 2007 |
| 1481 | Cummings Gene | | Oil Operator | Dec 2000 |
| 1482 | Cummings Oil & Cattle | Ada, OK 74820-0994 | Oil Operator | Jan 2017 |
| 1483 | Cummings Oil Company | Oklahoma City, OK 73112-6113 | Oil & Gas Operator | Nov 2025 |
| 1484 | Cummins Wren Oil Company | Tulsa, OK 74135 | Oil & Gas Operator | Nov 1998 |
| 1485 | Cundiff Harold | Perkins, OK 74059-4199 | Oil & Gas Operator | Apr 2025 |
| 1486 | Cundiff Jack | Perkins, OK 74059-4198 | Oil & Gas Operator | Apr 2014 |
| 1487 | Curn Lisa | Steubenville, OH 43952-2535 | Oil Operator | Oct 2025 |
| 1488 | Curran Oil Co | Great Falls, MT 59401 | Gas Operator | May 2001 |
| 1489 | Curzon Operating Company LTD | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Oct 2025 |
| 1490 | CVR Supply & Trading, LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |
| 1491 | CW Investments | Okmulgee, OK 74447-4026 | Oil & Gas Operator | Oct 2025 |
| 1492 | CWB Energy Inc | Oklahoma City, OK 73139-8837 | Oil Operator | May 2000 |
| 1493 | CX Disposals LLC | Minco, OK 73059-9472 | Oil Operator | Nov 2025 |
| 1494 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 1495 | Cyanostar Energy Inc | Tulsa, OK 74103-4122 | Oil & Gas Operator | Feb 1999 |
| 1496 | Cypress Exploration Company | Tulsa, OK 74132 | Oil & Gas Operator | Oct 2025 |
| 1497 | Czar Resources Inc | Houston, TX 77060 | Oil & Gas Operator | Oct 1992 |
| 1498 | D & B Johnson Family LLC | Owasso, OK 74055-7578 | Oil Operator | Apr 2025 |
| 1499 | D & B Oil Company | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 1500 | D & B Operating LLC | Ringwood, OK 73768 | Oil Operator | Jan 2023 |