| 2701 | Csa Exploration Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Aug 2003 |
| 2702 | CSL Exploration, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2018 |
| 2703 | Cso Consulting | Bridgeport, TX 76426 | Oil & Gas Operator | Mar 2020 |
| 2704 | CT Adams Jr., LLC | Schulenburg, TX 78956 | Oil Operator | Apr 2025 |
| 2705 | CTC Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 2706 | CTL Oil & Gas Corporation | Buchanan Dam, TX 78609 | Oil & Gas Operator | Nov 2020 |
| 2707 | CTL Production, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 2708 | CTR Petroleum, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Mar 2015 |
| 2709 | CTS Oil Recovery, LLC | Austin, TX 78747 | Oil Operator | May 2024 |
| 2710 | CTX Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |
| 2711 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | Apr 2025 |
| 2712 | Cuatro Petro Corp. | Richardson, TX 75080 | Oil & Gas Operator | Apr 2025 |
| 2713 | Cuba, John H. | Olney, TX 76374 | Oil Operator | Apr 2025 |
| 2714 | Cucharas Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 2715 | Cuervo Resources, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Oct 1996 |
| 2716 | Cuervo, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Apr 2025 |
| 2717 | Culebra Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 2718 | Culebra Oil & Gas, LLC | Kerrville, TX 78028 | Oil & Gas Operator | Apr 2025 |
| 2719 | Culoco, Inc. | Dallas, TX 75374 | Oil & Gas Operator | Nov 2024 |
| 2720 | Culver & Cain Production LLC | Tyler, TX 75711 | Oil & Gas Operator | Apr 2025 |
| 2721 | Cumberland Petroleum, Inc. II | Weatherford, TX 76086 | Oil & Gas Operator | May 1997 |
| 2722 | Cumming Company, Inc. The | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2025 |
| 2723 | Cummings, C. M. Oil & Gas | Lewisville, TX 75029 | Oil & Gas Operator | Nov 1993 |
| 2724 | Cummins & Walker Oil Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2021 |
| 2725 | Cundiff Operating Company | Dallas, TX 75238 | Oil & Gas Operator | Apr 2025 |
| 2726 | Curmar Producers | Adairsville, GA 30103 | Oil Operator | Mar 2008 |
| 2727 | Currie Cattle Co. | Big Spring, TX 79720 | Oil & Gas Operator | Sep 2007 |
| 2728 | Curzac Oil And Gas, LLC | Plano, TX 75075 | Oil & Gas Operator | Apr 2025 |
| 2729 | Custer & Wright Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 2730 | Cutbow Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 2731 | Cuyahoga Expl. & Devel. Corp. | Jericho, NY 11753 | Oil & Gas Operator | Dec 1996 |
| 2732 | CVR Supply & Trading LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |
| 2733 | CVS Operating, LLC. | Plano, TX 75074 | Oil & Gas Operator | Apr 2025 |
| 2734 | CVS Production, LLC. | Plano, TX 75074 | Oil Operator | Apr 2025 |
| 2735 | CW Dalcan Management SVCS, LTD. | Frisco, TX 75033 | Oil Operator | Apr 2025 |
| 2736 | CWC Oil & Gas, LLC | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 2737 | CWD Resources, LLC | Kilgore, TX 75663 | Oil Operator | Apr 2025 |
| 2738 | CWF Energy, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1997 |
| 2739 | Cwic, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Apr 2025 |
| 2740 | Cwo Energy, LLC | Midland, TX 79705 | Oil Operator | Apr 2025 |
| 2741 | Cwoc | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2025 |
| 2742 | CWS Aceite Operating, Inc. | Cotulla, TX 78014 | Oil & Gas Operator | Aug 2018 |
| 2743 | CX Operating LLC | Dallas, TX 75238 | Oil & Gas Operator | Apr 2025 |
| 2744 | CXL Energy LLC | Canada, 00100 | Oil & Gas Operator | Apr 2025 |
| 2745 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 2746 | Cyber Enviro-Tech Inc | | Oil Operator | Apr 2025 |
| 2747 | Cycle Oil & Gas Inc. | Katy, TX 77449 | Oil Operator | Apr 2025 |
| 2748 | Cyclone Exploration, Inc. | Florence, CO 81226 | Oil & Gas Operator | Apr 2025 |
| 2749 | Cymri Corporation, The | Houston, TX 77057 | Oil & Gas Operator | Mar 2008 |
| 2750 | Cymri, L.L.C. | Houston, TX 77042 | Oil & Gas Operator | Apr 2025 |
| 2751 | Cynpat Oil & Gas, Inc. | Sulphur SPGS, TX 75482 | Oil Operator | Nov 2018 |
| 2752 | Cypress E & P Corporation | Leander, TX 78646 | Oil & Gas Operator | Sep 2016 |
| 2753 | Cypress Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2025 |
| 2754 | Cypress Partners, Inc. | Houston, TX 77068 | Oil & Gas Operator | May 1999 |
| 2755 | Cypress Production, Inc. | Azle, TX 76020 | Oil & Gas Operator | Apr 2025 |
| 2756 | D & A Oil Company | Abilene, TX 79606 | Oil & Gas Operator | Oct 2018 |
| 2757 | D & B Energy Corporation | San Antonio, TX 78264 | Oil Operator | Apr 2025 |
| 2758 | D & B Oil Company | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 2759 | D & B Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 2760 | D & D Enterprises | Post, TX 79356 | Oil & Gas Operator | Apr 2025 |
| 2761 | D & D Oil Co. #2 | Post, TX 79356 | Oil & Gas Operator | Apr 2025 |
| 2762 | D & D Oil Company | Dayton, TX 77535 | Oil & Gas Operator | Apr 2025 |
| 2763 | D & D Well Service, L.L.C. | Post, TX 79356 | Oil Operator | Apr 2025 |
| 2764 | D & E Oil Co. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 2765 | D & G Company | Iraan, TX 79744 | Oil Operator | Apr 2006 |
| 2766 | D & G Operating Company, Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 2025 |
| 2767 | D & H Investments | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2025 |
| 2768 | D & H Oil | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2022 |
| 2769 | D & H Production, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2024 |
| 2770 | D & J Investments | Luling, TX 78648 | Oil Operator | Dec 2009 |
| 2771 | D & J Oil Co | Kermit, TX 79745 | Oil & Gas Operator | Apr 2025 |
| 2772 | D & L Operating Co. | Bangs, TX 76823 | Oil & Gas Operator | Nov 2022 |
| 2773 | D & L Partnership | Rhome, TX 76078 | Oil Operator | May 1987 |
| 2774 | D & M Company | Rockdale, TX 76567 | Oil & Gas Operator | Mar 2008 |
| 2775 | D & N Oil Co. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 2776 | D & P Operating & Prod. Corp. | Cedar Park, TX 78613 | Oil & Gas Operator | Dec 2003 |
| 2777 | D & R Enterprises | Eastland, TX 76448 | Oil & Gas Operator | Oct 2020 |
| 2778 | D & S Oil Co. #1 | Borger, TX 79007 | Oil & Gas Operator | Apr 2025 |
| 2779 | D & S Oil Company | Corsicana, TX 75151 | Oil & Gas Operator | Apr 2025 |
| 2780 | D & T Company | Denver, CO 80210 | Oil & Gas Operator | Jun 1983 |
| 2781 | D & V Oil Co., LP | San Angelo, TX 76909 | Oil & Gas Operator | Jan 2019 |
| 2782 | D & W Trucking Company | De Berry, TX 75639 | Oil Operator | Mar 2003 |
| 2783 | D And B Oil | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 2784 | D C Energy, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2020 |
| 2785 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | Apr 2025 |
| 2786 | D G D Oil Co. | Imperial, TX 79743 | Oil & Gas Operator | Apr 2025 |
| 2787 | D J Production | Pasadena, TX 77502 | Oil & Gas Operator | Apr 2025 |
| 2788 | D L Operating | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 2789 | D&H-S-S Production Co.,Inc | Corpus Chrsti, TX 78409 | Oil & Gas Operator | Aug 2003 |
| 2790 | D&M Operating, L.L.C. | Corpus Chrsti, TX 78414 | Gas Operator | Apr 2025 |
| 2791 | D&S Oil And Gas Properties | San Angelo, TX 76902 | Oil & Gas Operator | Apr 2025 |
| 2792 | D-Bar Leasing, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2022 |
| 2793 | D-Mil Production Inc | Argyle, TX 76226 | Oil & Gas Operator | Apr 2025 |
| 2794 | D-S-B Properties, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2014 |
| 2795 | D-S-B Properties, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 2796 | D-T Development Company | Richardson, TX 75081 | Oil & Gas Operator | Sep 2002 |
| 2797 | D. & D. Operating Account | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2009 |
| 2798 | D. A. B. Oil Service, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Nov 2012 |
| 2799 | D. G. Oil Co. | Dennis, TX 76439 | Oil & Gas Operator | Apr 2025 |
| 2800 | D. O. G. Operating, LLC | Port Aransas, TX 78373 | Oil & Gas Operator | Apr 2025 |