| 2601 | Cross Development Co. | | Oil Operator | Dec 1989 |
| 2602 | Cross Development-MMHS PRTSHP. | | Oil Operator | May 1987 |
| 2603 | Cross Development1984-1 PRTSHP | | Oil & Gas Operator | Sep 1990 |
| 2604 | Cross Don | Cushing, OK 74023-6316 | Oil & Gas Operator | Feb 2022 |
| 2605 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 2606 | Cross Timbers Oil Company | Dallas, TX 75284 | Oil & Gas Operator | May 2013 |
| 2607 | Cross Timbers Op | | Oil & Gas Operator | Nov 1996 |
| 2608 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2025 |
| 2609 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 2610 | Cross Winds Oil & Gas, LLC | Gruver, TX 79040 | Gas Operator | Dec 2025 |
| 2611 | Cross, Don E | | Oil & Gas Operator | Jan 2013 |
| 2612 | Crossbow Resources, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 2613 | Crossfield Larry | | Oil & Gas Operator | Sep 1993 |
| 2614 | Crossfoot Operating, LLC | Houston, TX 77227 | Oil & Gas Operator | Dec 2025 |
| 2615 | Crossing Rocks Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2018 |
| 2616 | Crossland Oil & Gas | Dallas, TX 75205 | Oil & Gas Operator | Aug 1994 |
| 2617 | Crossley, Patricia J. | Kennedy, NY 14747 | Gas Operator | Dec 2024 |
| 2618 | Crosspoint Energy Company | Dallas, TX 75205 | Oil & Gas Operator | Oct 2007 |
| 2619 | Crossroads Energy Development, LLC | | Oil Operator | Mar 2018 |
| 2620 | Crossroads Energy L.P. | Houston, TX 77064 | Oil & Gas Operator | Jun 2011 |
| 2621 | Crossroads Energy Partners, LLC | Houston, TX 77070 | Oil & Gas Operator | Mar 2018 |
| 2622 | Crossroads Mineral Prod., L.L.C. | Seguin, TX 78155 | Oil Operator | Dec 2025 |
| 2623 | Crossroads Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 2624 | Crossroads Petroleum L.L.C. | San Benito, TX 78586 | Oil & Gas Operator | Dec 2025 |
| 2625 | Crossroads Vacuum & Weld. Serv. | Luling, TX 78648 | Oil Operator | Mar 2010 |
| 2626 | Crosstex Lig, LLC | | Oil Operator | Mar 2014 |
| 2627 | Crosstex Processing SVCS, LLC | | Oil Operator | Mar 2014 |
| 2628 | Crosstex Services, L.L.C. | Tuscola, TX 79562 | Oil Operator | Dec 2025 |
| 2629 | Crosstex Treating Services, L.P. | | Oil Operator | Sep 2009 |
| 2630 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 2631 | Crouch, Eugene Louis | Lockhart, TX 78644 | Oil & Gas Operator | Apr 1999 |
| 2632 | Crow Creek Operating Co II LLC | Houston, TX 77252 | Oil & Gas Operator | Jul 2011 |
| 2633 | Crow Creek Operating Co III LLC | Tulsa, OK 74137-8432 | Oil & Gas Operator | Apr 2015 |
| 2634 | Crow Oil LLC | Tulsa, OK 74133-2914 | Oil & Gas Operator | Sep 2019 |
| 2635 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |
| 2636 | Crow, Donald | Gerry, NY 14740 | Gas Operator | Dec 2024 |
| 2637 | Crow-Eason | | Oil & Gas Operator | Feb 1984 |
| 2638 | Crow-Gulf Coast Venture | | Oil & Gas Operator | Aug 1985 |
| 2639 | Crow-Pittman | | Oil Operator | Aug 1993 |
| 2640 | Crowder Oil Co. | | Oil Operator | Sep 2008 |
| 2641 | Crowder Oil L.L.C. | | Oil Operator | Apr 2015 |
| 2642 | Crowe Drilling C | | Oil & Gas Operator | May 1995 |
| 2643 | Crowheart Energy LLC | Baggs, WY 82321 | Oil & Gas Operator | Sep 2025 |
| 2644 | Crown Central Pet Corp | Bellaire, TX 77401 | Oil & Gas Operator | Dec 2016 |
| 2645 | Crown Central Petroleum Corp | Richmond, TX 77469 | Oil & Gas Operator | Dec 1999 |
| 2646 | Crown Consulting Inc | Liberal, KS 67905 | Oil & Gas Operator | Jun 2025 |
| 2647 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Aug 2025 |
| 2648 | Crown Energy Partners LLC | Englewood, CO 80112 | Oil & Gas Operator | Sep 2013 |
| 2649 | Crown Equipment Co. | Weatherford, TX 76086 | Oil & Gas Operator | Dec 2025 |
| 2650 | Crown Oil & Gas Co Inc | Labarge, WY 83123 | Oil & Gas Operator | Jan 2023 |
| 2651 | Crown Oil, Inc. | Houston, TX 77002 | Oil Operator | Jan 1999 |
| 2652 | Crown Petroleum Company | Duncan, OK 73534-0938 | Oil & Gas Operator | Jan 2011 |
| 2653 | Crown Petroleum Corp. | Oklahoma City, OK 73106 | Oil & Gas Operator | Dec 2025 |
| 2654 | Crown Well Service Inc | Capon Bridge, WV 26711 | Oil Operator | Jun 2025 |
| 2655 | Crown Zellerbach | | Oil & Gas Operator | May 1986 |
| 2656 | Crown Zellerbach & Newton | | Oil Operator | May 1986 |
| 2657 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 2658 | Crozier & Company | Tyler, TX 75703 | Oil & Gas Operator | Jan 2020 |
| 2659 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |
| 2660 | Crude Kin Oil Company, Inc. | Louisburg, KS 66053 | Oil Operator | Jun 2025 |
| 2661 | Crude Oil Recovery Inc /Osage Only | | Oil & Gas Operator | Mar 2006 |
| 2662 | Crude Operators, L.L.C. | Pampa, TX 79066 | Oil & Gas Operator | Dec 2025 |
| 2663 | Crude Producers | | Oil & Gas Operator | Sep 1988 |
| 2664 | Crude Production Company | Clyde, TX 79510 | Oil & Gas Operator | Dec 2025 |
| 2665 | Crude Resources | Sapulpa, OK 74066 | Oil & Gas Operator | Mar 2008 |
| 2666 | Crude Resources, Inc. | Carrollton, TX 75011 | Oil & Gas Operator | Mar 2008 |
| 2667 | Crudewell Drilling, Inc | Albany, KY 42602 | Oil Operator | Dec 2023 |
| 2668 | Cruise Energy Inc | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2024 |
| 2669 | Crump Operating | Henrietta, TX 76365 | Oil & Gas Operator | Dec 2025 |
| 2670 | Crump Petroleum Corp | Midland, TX 79710 | Oil & Gas Operator | Feb 1999 |
| 2671 | Crumpler Oil | | Oil & Gas Operator | Nov 2024 |
| 2672 | Crumpton H A | Duncan, OK 73533 | Oil Operator | Dec 2002 |
| 2673 | Crupper Operating & Trading Company | | Oil & Gas Operator | Dec 1996 |
| 2674 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 2675 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 2676 | Crusader Energy Group LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2015 |
| 2677 | Crusader Energy II LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 2678 | Crusader Energy III LLC | Oklahoma City, OK 73142-1856 | Oil & Gas Operator | Feb 2011 |
| 2679 | Crusader Resources LC | Sugar Land, TX 77479 | Oil Operator | Dec 2025 |
| 2680 | Crusher Oil Company | Ponca City, OK 74604-5612 | Oil Operator | Apr 2017 |
| 2681 | Crutcher Oil Properties | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 2682 | Cruthird, Mark Oil | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 2683 | Cruzen Drilling Company Inc | Cleveland, OK 74020-0470 | Oil Operator | Nov 2014 |
| 2684 | Crystal Carbon Company | | Gas Operator | Dec 1930 |
| 2685 | Crystal Energy Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2019 |
| 2686 | Crystal Exploration & Production Company | Shreveport, LA 71120 | Oil & Gas Operator | Feb 1995 |
| 2687 | Crystal Exploration Co | | Oil & Gas Operator | Dec 2009 |
| 2688 | Crystal Gas, L.L.C. | | Oil & Gas Operator | Apr 2000 |
| 2689 | Crystal Oil And Land Company | | Oil & Gas Operator | May 1992 |
| 2690 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 2691 | Crystal River Oil & Gas LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2023 |
| 2692 | Csa Exploration Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Aug 2003 |
| 2693 | Csapo Limited | Creston, OH 44217 | Oil & Gas Operator | Dec 2012 |
| 2694 | CSC Energy Corp. | | Oil & Gas Operator | Dec 2009 |
| 2695 | CSC, Inc. | | Oil Operator | Jan 2000 |
| 2696 | CSD IV Oil LLC | Columbus, OH 43209 | Oil Operator | Dec 2024 |
| 2697 | CSL Exploration, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2018 |
| 2698 | CSM, Inc. | | Gas Operator | Oct 1990 |
| 2699 | Cso Consulting | Bridgeport, TX 76426 | Oil & Gas Operator | Mar 2020 |
| 2700 | Csoda Operating Company LLC | Amarillo, TX 79114-7506 | Oil & Gas Operator | Aug 2021 |