| 1401 | Corner Energy LLC | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Mar 2015 |
| 1402 | Cornerstone E & P Company, LP | Irving, TX 75038 | Oil & Gas Operator | Nov 2010 |
| 1403 | Coronado Energy Partners LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 1404 | Coronado Great Plains LLC | Tulsa, OK 74137-2832 | Gas Operator | Apr 2013 |
| 1405 | Coronado Oklahoma LLC | Tulsa, OK 74133-7036 | Gas Operator | Apr 2020 |
| 1406 | Coronado Petroleum Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Jan 2025 |
| 1407 | Corpening, Joe F. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 1408 | Corterra Energy Operating LLC | Tulsa, OK 74119-4844 | Oil & Gas Operator | Aug 2021 |
| 1409 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 1410 | Corvin Craig | Jenks, OK 74037-0516 | Oil Operator | Feb 2012 |
| 1411 | Corwin, B. V. | Enid, OK 73701 | Oil & Gas Operator | Apr 2017 |
| 1412 | Cory, Kenneth W. | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2012 |
| 1413 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 1414 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 1415 | Cotton County Ventures | Estes Park, CO 80517 | Oil Operator | Nov 2003 |
| 1416 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
| 1417 | Cottonmouth SWD LLC | Tulsa, OK 74103-3522 | Oil Operator | Oct 2024 |
| 1418 | Couch Donald W | Marlow, OK 73055-5252 | Oil & Gas Operator | Feb 2025 |
| 1419 | Couch Fred J | Broken Arrow, OK 74012 | Oil Operator | Mar 2010 |
| 1420 | Cougar Energy Investment LLC | Spring, TX 77387-7277 | Oil & Gas Operator | Sep 2014 |
| 1421 | Coughlin Daniel | El Reno, OK 73036 | Oil Operator | Aug 2000 |
| 1422 | Council Oak Resources LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jan 2025 |
| 1423 | County Line Stripper Wells LLC | Chelsea, OK 74016 | Oil & Gas Operator | Dec 2024 |
| 1424 | Countyline Production Co LLC | Duncan, OK 73533 | Oil Operator | Feb 2025 |
| 1425 | Couroil, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2000 |
| 1426 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 1427 | Courson, Harold D. | Perryton, TX 79070 | Oil & Gas Operator | Aug 1998 |
| 1428 | Cousins Exploration Co | Wichita Falls, TX 76307 | Oil Operator | Jun 1991 |
| 1429 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |
| 1430 | Covenant Oil Corp | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 1431 | Covington Oil Company Inc | Nichols Hills, OK 73116 | Oil & Gas Operator | Feb 2025 |
| 1432 | Cow Creek Resources Inc | Ponca City, OK 74601-7815 | Oil & Gas Operator | Jan 2025 |
| 1433 | Cowboy Oil & Gas | Bristow, OK 74010-0057 | Oil & Gas Operator | Jul 2018 |
| 1434 | Cowboy Operating LLC | Oklahoma City, OK 73120 | Oil Operator | Feb 2025 |
| 1435 | Cowden SR Lester L | Oklahoma City, OK 73118-4011 | Oil & Gas Operator | Sep 1999 |
| 1436 | Cowles James C | Muskogee, OK 74401-5262 | Oil Operator | Jan 2025 |
| 1437 | Cox Bros Oil Co | Hominy, OK 74035 | Oil Operator | Mar 2022 |
| 1438 | Cox Edwin L & R Berry | Dallas, TX 75202 | Oil & Gas Operator | Apr 2015 |
| 1439 | Cox Elmer N | Irving, TX 75181 | Oil Operator | Aug 2013 |
| 1440 | Cox Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1999 |
| 1441 | Cox Gas Corporation | Dallas, TX 75201-7306 | Oil & Gas Operator | Apr 2015 |
| 1442 | Cox Linda | Bristow, OK 74010-0808 | Oil & Gas Operator | Jan 2018 |
| 1443 | Cox Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2014 |
| 1444 | Cox P D Inc | Bristow, OK 74010 | Oil & Gas Operator | May 1993 |
| 1445 | Cox Resources Corporation | Dallas, TX 75244 | Oil & Gas Operator | Mar 2015 |
| 1446 | Cox Robert L | Blackwell, OK 74631 | Oil & Gas Operator | Dec 2024 |
| 1447 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 1448 | CP Energy LLC | Edmond, OK 73034 | Oil Operator | Feb 2025 |
| 1449 | CPRC Inc | Tulsa, OK 74103-5037 | Oil & Gas Operator | Apr 1997 |
| 1450 | CPRP Services LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Jan 2025 |
| 1451 | Crabtree Barbara T | Forney, TX 75126-5818 | Oil & Gas Operator | Oct 2024 |
| 1452 | Craft & Craft Productions LLC | Wagoner, OK 74467 | Oil Operator | Jan 2025 |
| 1453 | Craig Elder Oil And Gas LLC | Edmond, OK 73013 | Oil & Gas Operator | Jan 2025 |
| 1454 | Crain & Deisenroth | Tulsa, OK 74103-4433 | Oil & Gas Operator | Mar 2015 |
| 1455 | Crain & Deisenroth LLC | Tulsa, OK 74104-6511 | Oil & Gas Operator | Apr 2014 |
| 1456 | Crain Minerals LLC | Oklahoma City, OK 73120-1004 | Oil & Gas Operator | Aug 2014 |
| 1457 | Cramer Oil LLC | Nowata, OK 74048-6011 | Oil Operator | Jan 2025 |
| 1458 | Crane Newton T | | Oil & Gas Operator | Feb 2013 |
| 1459 | Crasco Oil Company | Tulsa, OK 74120 | Oil Operator | Nov 1998 |
| 1460 | Craw Operating LLC | Mooreland, OK 73852 | Oil & Gas Operator | Jan 2025 |
| 1461 | Crawford John L | | Oil & Gas Operator | Jul 1991 |
| 1462 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 1463 | CRB Resources Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2025 |
| 1464 | CRD Investments LLC | Duncan, OK 73533-4226 | Oil Operator | Feb 2025 |
| 1465 | Creede Oil & Gas Company | Oklahoma City, OK 73102-7502 | Oil & Gas Operator | Jun 2006 |
| 1466 | Creek Ellis | Haskell, OK 74436 | Oil & Gas Operator | Mar 2012 |
| 1467 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | Jan 2025 |
| 1468 | Crescent Exploration, LLC | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 1469 | Crescent Oil Energies Corp | Crescent, OK 73028 | Oil & Gas Operator | Jun 1997 |
| 1470 | Creslenn Oil Company | | Oil & Gas Operator | Nov 1998 |
| 1471 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 1472 | Crew B Operating, LLC | Okmulgee, OK 74447 | Oil Operator | Jan 2025 |
| 1473 | Cricket Enterprises Corporation | Nowata, OK 74048-9683 | Oil & Gas Operator | Mar 2015 |
| 1474 | Cricket Petroleum | Tulsa, OK 74146 | Oil & Gas Operator | Dec 2016 |
| 1475 | Criswell Energy LLC | Montezuma, IA 50171-8500 | Oil & Gas Operator | Oct 2022 |
| 1476 | CRM Energy Partners | Skiatook, OK 74070 | Oil & Gas Operator | Jan 2025 |
| 1477 | Cromer Carroll Oil & Gas LLC | Kalispell, MT 59901-8967 | Oil & Gas Operator | Dec 2024 |
| 1478 | Crooch John | Okmulgee, OK 74447 | Oil Operator | Jan 2025 |
| 1479 | Cross Don | Cushing, OK 74023-6316 | Oil & Gas Operator | Feb 2022 |
| 1480 | Cross Timbers Oil Company | Dallas, TX 75284 | Oil & Gas Operator | May 2013 |
| 1481 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2024 |
| 1482 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 1483 | Cross, Don E | | Oil & Gas Operator | Jan 2013 |
| 1484 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 1485 | Crow Creek Operating Co III LLC | Tulsa, OK 74137-8432 | Oil & Gas Operator | Apr 2015 |
| 1486 | Crow Oil LLC | Tulsa, OK 74133-2914 | Oil & Gas Operator | Sep 2019 |
| 1487 | Crown Central Pet Corp | Bellaire, TX 77401 | Oil & Gas Operator | Dec 2016 |
| 1488 | Crown Consulting, Inc. | Liberal, KS 67905 | Oil & Gas Operator | Dec 2024 |
| 1489 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Jan 2025 |
| 1490 | Crown Petroleum Company | Duncan, OK 73534-0938 | Oil & Gas Operator | Jan 2011 |
| 1491 | Crude Marketing & Trans Inc | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2017 |
| 1492 | Crude Oil Recovery Inc | Loma Linda, CA 92354 | Oil & Gas Operator | Mar 2006 |
| 1493 | Crude Resources | Sapulpa, OK 74066 | Oil & Gas Operator | Mar 2008 |
| 1494 | Crumpton H A | Duncan, OK 73533 | Oil Operator | Dec 2002 |
| 1495 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 1496 | Crusader Energy Group, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2015 |
| 1497 | Crusader Energy II, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 1498 | Crusader Energy III LLC | Oklahoma City, OK 73142-1856 | Oil & Gas Operator | Feb 2011 |
| 1499 | Crusher Oil Company | Ponca City, OK 74604-5612 | Oil Operator | Apr 2017 |
| 1500 | Cruzen Drilling Company Inc | Cleveland, OK 74020-0470 | Oil Operator | Nov 2014 |