| 2701 | CWD Resources, LLC | Kilgore, TX 75663 | Oil Operator | Jul 2025 |
| 2702 | CWF Energy, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1997 |
| 2703 | Cwic, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Jul 2025 |
| 2704 | Cwo Energy, LLC | Midland, TX 79705 | Oil Operator | Jul 2025 |
| 2705 | Cwoc | Big Spring, TX 79721 | Oil & Gas Operator | Jul 2025 |
| 2706 | CWS Aceite Operating, Inc. | Cotulla, TX 78014 | Oil & Gas Operator | Aug 2018 |
| 2707 | CX Operating LLC | Dallas, TX 75238 | Oil & Gas Operator | Jul 2025 |
| 2708 | CXL Energy LLC | Canada, 00100 | Oil & Gas Operator | Jul 2025 |
| 2709 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 2710 | Cyber Enviro-Tech Inc | | Oil & Gas Operator | Jul 2025 |
| 2711 | Cycle Oil & Gas Inc. | Katy, TX 77449 | Oil Operator | Jul 2025 |
| 2712 | Cyclone Exploration, Inc. | Florence, CO 81226 | Oil & Gas Operator | Jul 2025 |
| 2713 | Cymri Corporation, The | Houston, TX 77057 | Oil & Gas Operator | Mar 2008 |
| 2714 | Cymri, L.L.C. | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 2715 | Cynpat Oil & Gas, Inc. | Sulphur SPGS, TX 75482 | Oil Operator | Nov 2018 |
| 2716 | Cypress E & P Corporation | Leander, TX 78646 | Oil & Gas Operator | Sep 2016 |
| 2717 | Cypress Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2025 |
| 2718 | Cypress Partners, Inc. | Houston, TX 77068 | Oil & Gas Operator | May 1999 |
| 2719 | Cypress Production, Inc. | Azle, TX 76020 | Oil & Gas Operator | Jul 2025 |
| 2720 | D & A Oil Company | Abilene, TX 79606 | Oil & Gas Operator | Oct 2018 |
| 2721 | D & B Energy Corporation | San Antonio, TX 78264 | Oil Operator | Jul 2025 |
| 2722 | D & B Oil Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 2723 | D & B Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 2724 | D & D Enterprises | Post, TX 79356 | Oil & Gas Operator | Jul 2025 |
| 2725 | D & D Oil Co. #2 | Post, TX 79356 | Oil & Gas Operator | Jul 2025 |
| 2726 | D & D Oil Company | Dayton, TX 77535 | Oil & Gas Operator | Jul 2025 |
| 2727 | D & D Well Service, L.L.C. | Post, TX 79356 | Oil Operator | Jul 2025 |
| 2728 | D & E Oil Co | Perryton, TX 79070 | Oil & Gas Operator | Jul 2025 |
| 2729 | D & G Company | Iraan, TX 79744 | Oil Operator | Apr 2006 |
| 2730 | D & G Operating Company, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 2731 | D & H Investments | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 2025 |
| 2732 | D & H Oil | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2022 |
| 2733 | D & H Production, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2024 |
| 2734 | D & J Investments | Luling, TX 78648 | Oil Operator | Dec 2009 |
| 2735 | D & J Oil Company | Kermit, TX 79745 | Oil & Gas Operator | Jul 2025 |
| 2736 | D & L Operating Co. | Bangs, TX 76823 | Oil & Gas Operator | Nov 2022 |
| 2737 | D & L Partnership | Rhome, TX 76078 | Oil Operator | May 1987 |
| 2738 | D & M Company | Rockdale, TX 76567 | Oil & Gas Operator | Mar 2008 |
| 2739 | D & N Oil Co. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 2740 | D & P Operating & Prod. Corp. | Cedar Park, TX 78613 | Oil & Gas Operator | Dec 2003 |
| 2741 | D & R Enterprises | Eastland, TX 76448 | Oil & Gas Operator | Oct 2020 |
| 2742 | D & S Oil Co. #1 | Borger, TX 79007 | Oil & Gas Operator | Jul 2025 |
| 2743 | D & S Oil Company | Corsicana, TX 75151 | Oil & Gas Operator | Jul 2025 |
| 2744 | D & T Company | Denver, CO 80210 | Oil & Gas Operator | Jun 1983 |
| 2745 | D & V Oil Co., LP | San Angelo, TX 76909 | Oil & Gas Operator | Jan 2019 |
| 2746 | D & W Trucking Company | De Berry, TX 75639 | Oil Operator | Mar 2003 |
| 2747 | D And B Oil | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 2748 | D C Energy, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2020 |
| 2749 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | Jul 2025 |
| 2750 | D G D Oil Co. | Imperial, TX 79743 | Oil & Gas Operator | Jul 2025 |
| 2751 | D J Production | Pasadena, TX 77502 | Oil & Gas Operator | Mar 2025 |
| 2752 | D L Operating | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 2753 | D&H-S-S Production Co.,Inc | Corpus Chrsti, TX 78409 | Oil & Gas Operator | Aug 2003 |
| 2754 | D&M Operating, L.L.C. | Corpus Chrsti, TX 78414 | Gas Operator | Jul 2025 |
| 2755 | D&S Oil And Gas Properties | San Angelo, TX 76902 | Oil & Gas Operator | Jul 2025 |
| 2756 | D-Bar Leasing, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2022 |
| 2757 | D-Mil Production Inc | Argyle, TX 76226 | Oil & Gas Operator | Jul 2025 |
| 2758 | D-S-B Properties, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2014 |
| 2759 | D-S-B Properties, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 2760 | D-T Development Company | Richardson, TX 75081 | Oil & Gas Operator | Sep 2002 |
| 2761 | D. & D. Operating Account | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2009 |
| 2762 | D. A. B. Oil Service, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Nov 2012 |
| 2763 | D. G. Oil Co. | Dennis, TX 76439 | Oil & Gas Operator | Jul 2025 |
| 2764 | D. O. G. Operating, LLC | Port Aransas, TX 78373 | Oil & Gas Operator | Jul 2025 |
| 2765 | D. Shel Oil, Inc. | Gonzales, TX 78629 | Oil Operator | Jul 2025 |
| 2766 | D.C. Oil | Natalia, TX 78059 | Oil Operator | Jul 2025 |
| 2767 | D.J. & T. Energy | Abilene, TX 79601 | Oil & Gas Operator | Jul 2025 |
| 2768 | D.J.F. Services, Inc. | Holdenville, OK 74848 | Oil & Gas Operator | Jul 2025 |
| 2769 | D.K.D. | Merkel, TX 79536 | Oil & Gas Operator | Jul 2025 |
| 2770 | D.N.I. | Bangs, TX 76823 | Oil & Gas Operator | Jul 2025 |
| 2771 | D.O.E. Energy | Palestine, TX 75801 | Oil & Gas Operator | Jul 2025 |
| 2772 | D.T. Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 2773 | D.W.P. Production | Perryton, TX 79070 | Oil & Gas Operator | Nov 2020 |
| 2774 | D.Y. Exploration, Inc. | Boise, ID 83705 | Oil & Gas Operator | Jul 2025 |
| 2775 | D10 Energy LLC | Stinnett, TX 79083 | Oil & Gas Operator | Jul 2025 |
| 2776 | D90 Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Jul 2025 |
| 2777 | Da Crowe & Associates, Inc | Chappell Hill, TX 77426 | Oil & Gas Operator | Sep 2010 |
| 2778 | Dabb Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Aug 2020 |
| 2779 | Daco Oil | Joinerville, TX 75658 | Oil & Gas Operator | Aug 2019 |
| 2780 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Jul 2025 |
| 2781 | Dacott Oil & Gas, LLC | Pampa, TX 79065 | Oil & Gas Operator | Sep 2011 |
| 2782 | Daesung Energy Resources Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jul 2025 |
| 2783 | Daf Operating, LLC | Houston, TX 77005 | Oil & Gas Operator | Jul 2025 |
| 2784 | Dahab Energy Inc. | Dallas, TX 75225 | Oil & Gas Operator | Jul 2025 |
| 2785 | Dahco Operating, LLC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Jul 2025 |
| 2786 | Dahlia Operating LLC | Petrolia, TX 76377 | Oil & Gas Operator | Apr 2018 |
| 2787 | Daily, Carroll | Loving, TX 76460 | Oil & Gas Operator | Sep 2023 |
| 2788 | Dain Oil | Graham, TX 76450 | Oil & Gas Operator | Dec 2007 |
| 2789 | Dakar Operating Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 2001 |
| 2790 | Dakota Oil Company | Hebbronville, TX 78361 | Oil & Gas Operator | Jul 2025 |
| 2791 | Dakota Resources, Inc | Midland, TX 79707 | Oil & Gas Operator | Feb 2025 |
| 2792 | Dakota Resources, Inc. (I) | Midland, TX 79707 | Oil & Gas Operator | Jul 2025 |
| 2793 | Dale Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 2794 | Dale Operations, LLC | Dickinson, TX 77539 | Oil & Gas Operator | Jul 2025 |
| 2795 | Dale, Doyle C. | Poolville, TX 76487 | Oil & Gas Operator | Sep 2018 |
| 2796 | Daleco Resources, Inc. | Lewisville, TX 75067 | Oil & Gas Operator | Mar 2008 |
| 2797 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 2798 | Dales Oil Company | Loving, TX 76460 | Oil Operator | Jul 2025 |
| 2799 | Dalf Energy LLC | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 2800 | Dallas Operating Corp. | Dallas, TX 75205 | Oil & Gas Operator | Nov 2006 |