| 2501 | Crimson Explor Operating, Inc. | | Oil & Gas Operator | Dec 2009 |
| 2502 | Crimson Exploration Inc. | Houston, TX 77060 | Oil & Gas Operator | Apr 2006 |
| 2503 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 2504 | Crimson Resource Management Corp. | | Oil & Gas Operator | Dec 2023 |
| 2505 | Crimson Resources, LLC | Tulsa, OK 74133 | Oil Operator | Jul 2007 |
| 2506 | Cris Oil | | Oil Operator | Nov 2023 |
| 2507 | Crisco Operating LLC | Lago VIsta, TX 78645 | Oil & Gas Operator | Apr 2023 |
| 2508 | Crissinger Robert A Inc | Strongsville, OH 44136 | Oil & Gas Operator | Dec 2003 |
| 2509 | Criswell E. White | | Gas Operator | Jun 2015 |
| 2510 | Criswell Energy LLC | Montezuma, IA 50171-8500 | Oil & Gas Operator | Oct 2022 |
| 2511 | Criteria Petrole | | Oil Operator | Sep 1996 |
| 2512 | Criterion Energy, Limited | Austin, TX 78737 | Gas Operator | Jan 2003 |
| 2513 | CRJ Bond Operations, LLC | Graham, TX 76450 | Oil Operator | Apr 2024 |
| 2514 | CRM Energy Partners | Skiatook, OK 74070 | Oil & Gas Operator | Jan 2024 |
| 2515 | CRM Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2024 |
| 2516 | Crocker Oil Company | Windthorst, TX 76389 | Oil & Gas Operator | Aug 1999 |
| 2517 | Crockett Oil And Gas, Inc. | Sharon, KS 67138 | Oil & Gas Operator | Jun 2006 |
| 2518 | Crockett Operating, LLC | Arlington, TX 76017 | Oil & Gas Operator | Apr 2024 |
| 2519 | Crockett Operting, LLC | Arlington, TX 76013 | Oil & Gas Operator | Oct 2020 |
| 2520 | Croft Petroleum Co. | Cut Bank, MT 59427 | Oil & Gas Operator | Dec 2022 |
| 2521 | Croker, Danny | Wichita Falls, TX 76302 | Oil & Gas Operator | Apr 2024 |
| 2522 | Cromeens Petroleum, Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | Sep 1996 |
| 2523 | Cromer Carroll Oil & Gas LLC | | Oil & Gas Operator | Jan 2024 |
| 2524 | Crone Oil Company | Gruver, TX 79040 | Oil & Gas Operator | Apr 2024 |
| 2525 | Cronus Exploration Co LLC | | Oil & Gas Operator | Feb 2024 |
| 2526 | Crooch John | Okmulgee, OK 74447 | Oil Operator | Dec 2023 |
| 2527 | Crook-Woodlin Expl.,Inc. | | Oil Operator | Feb 1988 |
| 2528 | Crosbys Creek Oil & Gas, LLC | Ridgeland, MS 39157 | Oil & Gas Operator | Dec 2023 |
| 2529 | Cross And Cross | Overland Park, KS 66214 | Oil Operator | Sep 1997 |
| 2530 | Cross Bar Energy, LLC | Wichita, KS 67206 | Oil Operator | Dec 2023 |
| 2531 | Cross Bar Petrol | | Oil Operator | Aug 1995 |
| 2532 | Cross Bar Petroleum, Inc. | Wichita, KS 67205 | Oil & Gas Operator | Jun 2016 |
| 2533 | Cross Border Resources, Inc. | Dallas, TX 75235 | Oil & Gas Operator | Jan 2022 |
| 2534 | Cross Creek Corporation | Duncan, OK 73534 | Oil & Gas Operator | Mar 1999 |
| 2535 | Cross Creek Energy LLC | Houston, TX 77074 | Oil & Gas Operator | Aug 2013 |
| 2536 | Cross Development Co. | | Oil Operator | Dec 1989 |
| 2537 | Cross Development-MMHS PRTSHP. | | Oil Operator | May 1987 |
| 2538 | Cross Development1984-1 PRTSHP | | Oil & Gas Operator | Sep 1990 |
| 2539 | Cross Don | Cushing, OK 74023-6316 | Oil & Gas Operator | Feb 2022 |
| 2540 | Cross Robert | | Oil Operator | Jan 2024 |
| 2541 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 2542 | Cross Timbers Oil Company | Dallas, TX 75284 | Oil & Gas Operator | May 2013 |
| 2543 | Cross Timbers Op | | Oil & Gas Operator | Nov 1996 |
| 2544 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2023 |
| 2545 | Cross Timbers Operating Inc | | Gas Operator | Jul 2001 |
| 2546 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 2547 | Cross Winds Oil & Gas, LLC | Gruver, TX 79040 | Gas Operator | Apr 2024 |
| 2548 | Cross, Don E | | Oil & Gas Operator | Jan 2013 |
| 2549 | Cross, Howard W | Albany, KY 42602 | Oil Operator | Dec 2022 |
| 2550 | Crossbow Resources, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 2551 | Crossfield Larry | | Oil & Gas Operator | Sep 1993 |
| 2552 | Crossfoot Operating, LLC | Houston, TX 77227 | Oil & Gas Operator | Apr 2024 |
| 2553 | Crossing Rocks Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2018 |
| 2554 | Crossland Oil & Gas | Dallas, TX 75205 | Oil & Gas Operator | Aug 1994 |
| 2555 | Crosspoint Energy Company | Dallas, TX 75205 | Oil & Gas Operator | Oct 2007 |
| 2556 | Crossroads Energy Development, LLC | | Oil Operator | Mar 2018 |
| 2557 | Crossroads Energy L.P. | Houston, TX 77064 | Oil & Gas Operator | Jun 2011 |
| 2558 | Crossroads Energy Partners, LLC | Houston, TX 77070 | Oil & Gas Operator | Mar 2018 |
| 2559 | Crossroads Mineral Prod., L.L.C. | Seguin, TX 78155 | Oil Operator | Apr 2024 |
| 2560 | Crossroads Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 2561 | Crossroads Petroleum L.L.C. | San Benito, TX 78586 | Oil & Gas Operator | Apr 2024 |
| 2562 | Crossroads Vacuum & Weld. Serv. | Luling, TX 78648 | Oil Operator | Mar 2010 |
| 2563 | Crosstex Lig, LLC | | Oil Operator | Mar 2014 |
| 2564 | Crosstex Processing SVCS, LLC | | Oil Operator | Mar 2014 |
| 2565 | Crosstex Services, L.L.C. | Tuscola, TX 79562 | Oil Operator | Apr 2024 |
| 2566 | Crosstex Treating Services, L.P. | | Oil Operator | Sep 2009 |
| 2567 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 2568 | Crouch, Eugene Louis | Lockhart, TX 78644 | Oil & Gas Operator | Apr 1999 |
| 2569 | Crow Creek Operating Co II LLC | Houston, TX 77252 | Oil & Gas Operator | Nov 2011 |
| 2570 | Crow Creek Operating Co III LLC | | Oil & Gas Operator | Apr 2015 |
| 2571 | Crow Oil LLC | Tulsa, OK 74133-2914 | Oil & Gas Operator | Sep 2019 |
| 2572 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |
| 2573 | Crow, Donald | Gerry, NY 14740 | Gas Operator | Dec 2022 |
| 2574 | Crow-Eason | | Oil & Gas Operator | Feb 1984 |
| 2575 | Crow-Gulf Coast Venture | | Oil & Gas Operator | Aug 1985 |
| 2576 | Crow-Pittman | | Oil Operator | Aug 1993 |
| 2577 | Crowder Oil Co. | | Oil Operator | Sep 2008 |
| 2578 | Crowder Oil L.L.C. | | Oil Operator | Apr 2015 |
| 2579 | Crowe Drilling C | | Oil & Gas Operator | May 1995 |
| 2580 | Crowheart Energy LLC | Baggs, WY 82321 | Oil & Gas Operator | Feb 2024 |
| 2581 | Crown Central Pet Corp | Bellaire, TX 77401 | Oil & Gas Operator | Dec 2016 |
| 2582 | Crown Central Petroleum Corp | Richmond, TX 77469 | Oil & Gas Operator | Dec 1999 |
| 2583 | Crown Consulting, Inc. | Liberal, KS 67905 | Oil & Gas Operator | Dec 2023 |
| 2584 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Jan 2024 |
| 2585 | Crown Energy Partners LLC | Englewood, CO 80112 | Oil & Gas Operator | Sep 2013 |
| 2586 | Crown Equipment Co. | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2024 |
| 2587 | Crown Oil & Gas Co Inc | Labarge, WY 83123 | Oil & Gas Operator | Jan 2023 |
| 2588 | Crown Oil, Inc. | Houston, TX 77002 | Oil Operator | Jan 1999 |
| 2589 | Crown Petroleum Company | Duncan, OK 73534-0938 | Oil & Gas Operator | Jan 2011 |
| 2590 | Crown Petroleum Corp. | Oklahoma City, OK 73106 | Oil & Gas Operator | Apr 2024 |
| 2591 | Crown Well Service Inc | Capon Bridge, WV 26711 | Oil Operator | Dec 2023 |
| 2592 | Crown Zellerbach | | Oil & Gas Operator | May 1986 |
| 2593 | Crown Zellerbach & Newton | | Oil Operator | May 1986 |
| 2594 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 2595 | Crozier & Company | Tyler, TX 75703 | Oil & Gas Operator | Jan 2020 |
| 2596 | CRS Energy LLC | Stoneboro, PA 16153 | Oil & Gas Operator | Dec 2023 |
| 2597 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |
| 2598 | Crude Kin Oil Company, Inc. | Louisburg, KS 66053 | Oil Operator | Dec 2023 |
| 2599 | Crude Marketing & Trans Inc | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2017 |
| 2600 | Crude Oil Recovery Inc | Loma Linda, CA 92354 | Oil & Gas Operator | Mar 2006 |