| 2601 | Crimson Energy PTNRS III, L.L.C. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2023 |
| 2602 | Crimson Exploration Inc. | Houston, TX 77060 | Oil & Gas Operator | Apr 2006 |
| 2603 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 2604 | Crisis Oil Co., Inc. | Dallas, TX 75252 | Oil & Gas Operator | Jun 1995 |
| 2605 | Criterion Energy, Limited | Austin, TX 78737 | Gas Operator | Jan 2003 |
| 2606 | CRJ Bond Operations, LLC | Graham, TX 76450 | Oil Operator | Jun 2026 |
| 2607 | CRM Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Jun 2026 |
| 2608 | Crocker Oil Company | Windthorst, TX 76389 | Oil & Gas Operator | Aug 1999 |
| 2609 | Crockett Operating, LLC | Arlington, TX 76017 | Oil & Gas Operator | Jun 2026 |
| 2610 | Crockett Operting, LLC | Arlington, TX 76013 | Oil & Gas Operator | Oct 2020 |
| 2611 | Croker, Danny | Wichita Falls, TX 76302 | Oil & Gas Operator | Jun 2026 |
| 2612 | Cromeens Petroleum, Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | Sep 1996 |
| 2613 | Crone Oil Company | Gruver, TX 79040 | Oil & Gas Operator | Jun 2026 |
| 2614 | Cross Creek Energy LLC | Houston, TX 77074 | Oil & Gas Operator | Aug 2013 |
| 2615 | Cross Cut Petroleum, LLC | Abilene, TX 79602 | Oil & Gas Operator | Jun 2026 |
| 2616 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2026 |
| 2617 | Cross Timbers Oil Company | Dallas, TX 75284 | Oil & Gas Operator | May 2013 |
| 2618 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 2619 | Cross Winds Oil & Gas, LLC | Gruver, TX 79040 | Gas Operator | Jun 2026 |
| 2620 | Crossbow Resources, LLC | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 2621 | Crossfoot Operating, LLC | Houston, TX 77227 | Oil & Gas Operator | Jun 2026 |
| 2622 | Crossing Rocks Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2018 |
| 2623 | Crossland Oil & Gas | Dallas, TX 75205 | Oil & Gas Operator | Aug 1994 |
| 2624 | Crosspoint Energy Company | Dallas, TX 75205 | Oil & Gas Operator | Oct 2007 |
| 2625 | Crossroads Energy L.P. | Houston, TX 77064 | Oil & Gas Operator | Jun 2011 |
| 2626 | Crossroads Energy Partners, LLC | Houston, TX 77070 | Oil & Gas Operator | Mar 2018 |
| 2627 | Crossroads Mineral Prod., L.L.C. | Seguin, TX 78155 | Oil Operator | Jun 2026 |
| 2628 | Crossroads Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Jun 2026 |
| 2629 | Crossroads Petroleum L.L.C. | San Benito, TX 78586 | Oil & Gas Operator | Jun 2026 |
| 2630 | Crossroads Vacuum & Weld. Serv. | Luling, TX 78648 | Oil Operator | Mar 2010 |
| 2631 | Crosstex Services, L.L.C. | Tuscola, TX 79562 | Oil Operator | Jun 2026 |
| 2632 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 2633 | Crouch, Eugene Louis | Lockhart, TX 78644 | Oil & Gas Operator | Apr 1999 |
| 2634 | Crow Creek Operating Co II LLC | Houston, TX 77252 | Oil & Gas Operator | Jul 2011 |
| 2635 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |
| 2636 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Mar 2026 |
| 2637 | Crown Equipment Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jun 2026 |
| 2638 | Crown Petroleum Corp. | Oklahoma City, OK 73106 | Oil & Gas Operator | Jun 2026 |
| 2639 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 2640 | Crozier & Company | Tyler, TX 75703 | Oil & Gas Operator | Jan 2020 |
| 2641 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |
| 2642 | Crude Operators, L.L.C. | Pampa, TX 79066 | Oil & Gas Operator | Jun 2026 |
| 2643 | Crude Production Company | Clyde, TX 79510 | Oil & Gas Operator | Jun 2026 |
| 2644 | Crude Resources, Inc. | Carrollton, TX 75011 | Oil & Gas Operator | Mar 2008 |
| 2645 | Crump Operating | Henrietta, TX 76365 | Oil & Gas Operator | Jun 2026 |
| 2646 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 2647 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 2648 | Crusader Energy Group LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2015 |
| 2649 | Crusader Energy II LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 2650 | Crusader Resources LC | Sugar Land, TX 77479 | Oil Operator | Jun 2026 |
| 2651 | Crutcher Oil Properties | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2026 |
| 2652 | Cruthird, Mark Oil | Grandfield, OK 73546 | Oil & Gas Operator | Jun 2026 |
| 2653 | Crystal J Oil And Gas LLC | San Angelo, TX 76904 | Oil & Gas Operator | Jun 2026 |
| 2654 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 2655 | Crystal River Oil & Gas LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2023 |
| 2656 | Csa Exploration Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Aug 2003 |
| 2657 | CSL Exploration, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2018 |
| 2658 | Cso Consulting | Bridgeport, TX 76426 | Oil & Gas Operator | Mar 2020 |
| 2659 | CT Adams Jr., LLC | Schulenburg, TX 78956 | Oil Operator | Jun 2026 |
| 2660 | CTC Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 2661 | CTL Oil & Gas Corporation | Buchanan Dam, TX 78609 | Oil & Gas Operator | Nov 2020 |
| 2662 | CTL Production, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Jun 2026 |
| 2663 | CTR Petroleum, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Mar 2015 |
| 2664 | CTX Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |
| 2665 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | Jun 2026 |
| 2666 | Cuatro Petro Corp. | Richardson, TX 75080 | Oil & Gas Operator | Jun 2026 |
| 2667 | Cuba, John H. | Olney, TX 76374 | Oil Operator | Jun 2026 |
| 2668 | Cucharas Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 2669 | Cuervo, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Jun 2026 |
| 2670 | Culebra Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 2671 | Culebra Oil & Gas, LLC | Kerrville, TX 78028 | Oil & Gas Operator | Jun 2026 |
| 2672 | Culoco, Inc. | Dallas, TX 75374 | Oil & Gas Operator | Nov 2024 |
| 2673 | Culver & Cain Production LLC | Tyler, TX 75711 | Oil & Gas Operator | Jun 2026 |
| 2674 | Cumberland Petroleum, Inc. II | Weatherford, TX 76086 | Oil & Gas Operator | May 1997 |
| 2675 | Cumming Company, Inc. The | Fort Worth, TX 76116 | Oil & Gas Operator | Jun 2026 |
| 2676 | Cummings, C. M. Oil & Gas | Lewisville, TX 75029 | Oil & Gas Operator | Nov 1993 |
| 2677 | Cummins & Walker Oil Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2021 |
| 2678 | Cundiff Operating Company | Dallas, TX 75238 | Oil & Gas Operator | Jun 2026 |
| 2679 | Curmar Producers | Adairsville, GA 30103 | Oil Operator | Mar 2008 |
| 2680 | Currie Cattle Co. | Big Spring, TX 79720 | Oil & Gas Operator | Sep 2007 |
| 2681 | Curzac Oil And Gas, LLC | Texarkana, TX 75503 | Oil & Gas Operator | Jun 2026 |
| 2682 | Custer & Wright Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 2683 | Cutbow Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Jun 2026 |
| 2684 | Cuyahoga Expl. & Devel. Corp. | Jericho, NY 11753 | Oil & Gas Operator | Dec 1996 |
| 2685 | CVR Supply & Trading, LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |
| 2686 | CVS Operating, LLC. | Plano, TX 75074 | Oil & Gas Operator | Jun 2026 |
| 2687 | CVS Production, LLC. | Plano, TX 75074 | Oil Operator | Jun 2026 |
| 2688 | CW Dalcan Management SVCS, LTD. | Frisco, TX 75033 | Oil Operator | Jun 2026 |
| 2689 | CWC Oil & Gas, LLC | Abilene, TX 79608 | Oil & Gas Operator | Jun 2026 |
| 2690 | CWD Resources, LLC | Kilgore, TX 75663 | Oil Operator | Jun 2026 |
| 2691 | CWF Energy, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1997 |
| 2692 | Cwic, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Jun 2026 |
| 2693 | Cwo Energy, LLC | Midland, TX 79705 | Oil Operator | Jun 2026 |
| 2694 | Cwoc | Big Spring, TX 79721 | Oil & Gas Operator | Jun 2026 |
| 2695 | CWS Aceite Operating, Inc. | Cotulla, TX 78014 | Oil & Gas Operator | Aug 2018 |
| 2696 | CX Operating LLC | Dallas, TX 75238 | Oil & Gas Operator | Jun 2026 |
| 2697 | CXL Energy LLC | Canada, 00100 | Oil & Gas Operator | Jun 2026 |
| 2698 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 2699 | Cyber Enviro-Tech Inc | San Tan Valley, AZ 85144 | Oil & Gas Operator | Jun 2026 |
| 2700 | Cycle Oil & Gas Inc. | Katy, TX 77449 | Oil Operator | Jun 2026 |