| 2501 | Creco Operating, LLC | | Oil & Gas Operator | Nov 2015 |
| 2502 | Credo Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | Jan 2013 |
| 2503 | Cree Oil LLC | | Oil & Gas Operator | Jul 2025 |
| 2504 | Creed Operating Co., LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2025 |
| 2505 | Creede Oil & Gas Company | Oklahoma City, OK 73102-7502 | Oil & Gas Operator | Jun 2006 |
| 2506 | Creek Ellis | Haskell, OK 74436 | Oil & Gas Operator | Mar 2012 |
| 2507 | Creek Energy, Inc. | Brownwood, TX 76804 | Oil & Gas Operator | Sep 2025 |
| 2508 | Creek Oil Company | Colorado Springs, CO 80906 | Oil & Gas Operator | Aug 2001 |
| 2509 | Creek Operating Company, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Sep 1998 |
| 2510 | Crego Exploration | Dallas, TX 75243 | Oil & Gas Operator | Sep 2025 |
| 2511 | Creighton Rick D | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2016 |
| 2512 | Cremson Oil & Gas | Coleman, TX 76834 | Oil & Gas Operator | Sep 2025 |
| 2513 | Crenshaw Oil | Wichita Falls, TX 76302 | Oil & Gas Operator | Sep 2025 |
| 2514 | Crenshaw, Joe R. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2003 |
| 2515 | Crenshaw, K. M. | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2018 |
| 2516 | Creole Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 2517 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | May 2025 |
| 2518 | Crescent Drillin | | Gas Operator | Apr 1991 |
| 2519 | Crescent Drilling Company, Inc. | | Gas Operator | Dec 2024 |
| 2520 | Crescent DRLG & DVLPMNT, Inc. | | Oil & Gas Operator | Oct 1992 |
| 2521 | Crescent Energy Company | | Oil Operator | May 1993 |
| 2522 | Crescent Exploration Company | Austin, TX 78767 | Oil & Gas Operator | Aug 1995 |
| 2523 | Crescent Exploration, LLC | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 2524 | Crescent Oil & Gas | Decatur, TX 76234 | Gas Operator | Dec 1999 |
| 2525 | Crescent Pass Energy, LLC | Houston, TX 77070 | Oil & Gas Operator | Sep 2025 |
| 2526 | Crescent Point Energy Us Corp | Denver, CO 80202 | Oil & Gas Operator | Apr 2024 |
| 2527 | Creslenn Oil Company | | Oil & Gas Operator | Nov 1998 |
| 2528 | Crest Oil & Gas Management Corp. | | Oil & Gas Operator | Jun 2025 |
| 2529 | Crest Operating Company | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 2530 | Crest Petr Inc | Rose Hill, KS 67133 | Oil Operator | Jun 2000 |
| 2531 | Crest Petroleum | Newark, OH 43055 | Oil & Gas Operator | Nov 1993 |
| 2532 | Crest Petroleum, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2025 |
| 2533 | Crest Resources & Expl. Corp. | Houston, TX 77079 | Oil & Gas Operator | Dec 1998 |
| 2534 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2025 |
| 2535 | Crestmont Operating LLC | New York, NY 10151 | Oil Operator | Sep 2025 |
| 2536 | Creston Oil Corporation | Jacksonville, FL 32225 | Oil & Gas Operator | Dec 2021 |
| 2537 | Creston Petroleum Corp. | Dallas, TX 75380 | Oil & Gas Operator | Sep 2025 |
| 2538 | Crestone Peak Resources Operating LLC | | Oil & Gas Operator | Jun 2025 |
| 2539 | Crestridge DRLG. & Prod.Co.,LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2023 |
| 2540 | Creswell, Chris | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 2541 | Creswell, R.G. | Graham, TX 76450 | Oil & Gas Operator | Feb 2013 |
| 2542 | Crew B Operating, LLC | Okmulgee, OK 74447 | Oil Operator | May 2025 |
| 2543 | Crey Oil & Gas LLC | Sundown, TX 79372 | Oil Operator | Sep 2025 |
| 2544 | CRG Properties LTD. | | Oil & Gas Operator | Dec 2013 |
| 2545 | Cricket Enterprises Corporation | Nowata, OK 74048-9683 | Oil & Gas Operator | Mar 2015 |
| 2546 | Criger Oil Compa | | Oil Operator | Sep 1992 |
| 2547 | Crimson Energy Company, LC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2004 |
| 2548 | Crimson Energy Partners IV, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2023 |
| 2549 | Crimson Energy Partners, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2009 |
| 2550 | Crimson Energy PTNRS III, L.L.C. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2023 |
| 2551 | Crimson Explor Operating, Inc. | | Oil & Gas Operator | Dec 2009 |
| 2552 | Crimson Exploration Inc. | Houston, TX 77060 | Oil & Gas Operator | Apr 2006 |
| 2553 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 2554 | Crimson Resource Management Corp. | | Oil & Gas Operator | Jul 2025 |
| 2555 | Crimson Resources, LLC | Tulsa, OK 74133 | Oil Operator | Jul 2007 |
| 2556 | Cris Oil | | Oil Operator | Dec 2024 |
| 2557 | Crisis Oil Co., Inc. | Dallas, TX 75252 | Oil & Gas Operator | Jun 1995 |
| 2558 | Crissinger Robert A Inc | Strongsville, OH 44136 | Oil & Gas Operator | Dec 2003 |
| 2559 | Criswell E. White | | Gas Operator | Jun 2015 |
| 2560 | Criswell Energy LLC | Montezuma, IA 50171-8500 | Oil & Gas Operator | Oct 2022 |
| 2561 | Criteria Petrole | | Oil Operator | Sep 1996 |
| 2562 | Criterion Energy, Limited | Austin, TX 78737 | Gas Operator | Jan 2003 |
| 2563 | CRJ Bond Operations, LLC | Graham, TX 76450 | Oil Operator | Sep 2025 |
| 2564 | CRM Energy Partners | | Oil & Gas Operator | May 2025 |
| 2565 | CRM Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Sep 2025 |
| 2566 | Crocker Oil Company | Windthorst, TX 76389 | Oil & Gas Operator | Aug 1999 |
| 2567 | Crockett Oil And Gas, Inc. | Sharon, KS 67138 | Oil & Gas Operator | Jun 2006 |
| 2568 | Crockett Operating, LLC | Arlington, TX 76017 | Oil & Gas Operator | Sep 2025 |
| 2569 | Crockett Operting, LLC | Arlington, TX 76013 | Oil & Gas Operator | Oct 2020 |
| 2570 | Croft Petroleum Co. | Cut Bank, MT 59427 | Oil & Gas Operator | Dec 2022 |
| 2571 | Croker, Danny | Wichita Falls, TX 76302 | Oil & Gas Operator | Sep 2025 |
| 2572 | Cromeens Petroleum, Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | Sep 1996 |
| 2573 | Cromer Carroll Oil & Gas LLC | Kalispell, MT 59901 | Oil & Gas Operator | Apr 2025 |
| 2574 | Crone Oil Company | Gruver, TX 79040 | Oil & Gas Operator | Sep 2025 |
| 2575 | Cronus Exploration Co LLC | | Oil & Gas Operator | May 2025 |
| 2576 | Crooch John | Okmulgee, OK 74447 | Oil Operator | May 2025 |
| 2577 | Crook-Woodlin Expl.,Inc. | | Oil Operator | Feb 1988 |
| 2578 | Crosbys Creek Oil & Gas, LLC | Ridgeland, MS 39157 | Oil & Gas Operator | May 2025 |
| 2579 | Cross And Cross | Overland Park, KS 66214 | Oil Operator | Sep 1997 |
| 2580 | Cross Bar Energy, LLC | Wichita, KS 67206 | Oil Operator | Apr 2025 |
| 2581 | Cross Bar Petrol | | Oil Operator | Aug 1995 |
| 2582 | Cross Bar Petroleum, Inc. | Wichita, KS 67205 | Oil & Gas Operator | Jun 2016 |
| 2583 | Cross Border Resources, Inc. | Dallas, TX 75235 | Oil & Gas Operator | Jan 2022 |
| 2584 | Cross Creek Corporation | Duncan, OK 73534 | Oil & Gas Operator | Mar 1999 |
| 2585 | Cross Creek Energy LLC | Houston, TX 77074 | Oil & Gas Operator | Aug 2013 |
| 2586 | Cross Cut Petroleum, LLC | Abilene, TX 79602 | Oil Operator | Sep 2025 |
| 2587 | Cross Development Co. | | Oil Operator | Dec 1989 |
| 2588 | Cross Development-MMHS PRTSHP. | | Oil Operator | May 1987 |
| 2589 | Cross Development1984-1 PRTSHP | | Oil & Gas Operator | Sep 1990 |
| 2590 | Cross Don | Cushing, OK 74023-6316 | Oil & Gas Operator | Feb 2022 |
| 2591 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2025 |
| 2592 | Cross Timbers Oil Company | Dallas, TX 75284 | Oil & Gas Operator | May 2013 |
| 2593 | Cross Timbers Op | | Oil & Gas Operator | Nov 1996 |
| 2594 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 2595 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 2596 | Cross Winds Oil & Gas, LLC | Gruver, TX 79040 | Gas Operator | Sep 2025 |
| 2597 | Cross, Don E | | Oil & Gas Operator | Jan 2013 |
| 2598 | Crossbow Resources, LLC | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 2599 | Crossfield Larry | | Oil & Gas Operator | Sep 1993 |
| 2600 | Crossfoot Operating, LLC | Houston, TX 77227 | Oil & Gas Operator | Sep 2025 |