| 2801 | Cycle Oil & Gas Inc. | Katy, TX 77449 | Oil Operator | Feb 2026 |
| 2802 | Cyclone Exploration, Inc. | Florence, CO 81226 | Oil & Gas Operator | Feb 2026 |
| 2803 | Cymraec Resources, Inc. | Houston, TX 77060 | Gas Operator | Sep 2007 |
| 2804 | Cymri Corporation, The | Houston, TX 77057 | Oil & Gas Operator | Mar 2008 |
| 2805 | Cymri, L.L.C. | Houston, TX 77042 | Oil & Gas Operator | Feb 2026 |
| 2806 | Cynpat Oil & Gas, Inc. | Sulphur SPGS, TX 75482 | Oil Operator | Nov 2018 |
| 2807 | Cypress E & P Corporation | Leander, TX 78646 | Oil & Gas Operator | Sep 2016 |
| 2808 | Cypress Energy Development Co | Cypress, TX 77429 | Oil & Gas Operator | Jun 1999 |
| 2809 | Cypress Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2026 |
| 2810 | Cypress Partners, Inc. | Houston, TX 77068 | Oil & Gas Operator | May 1999 |
| 2811 | Cypress Production, Inc. | Azle, TX 76020 | Oil & Gas Operator | Feb 2026 |
| 2812 | Cytex South Texas Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 2813 | D & A Oil Company | Abilene, TX 79606 | Oil & Gas Operator | Oct 2018 |
| 2814 | D & B Energy Corporation | San Antonio, TX 78264 | Oil Operator | Feb 2026 |
| 2815 | D & B Oil Company | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 2816 | D & B Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 2817 | D & D Enterprises | Post, TX 79356 | Oil & Gas Operator | Feb 2026 |
| 2818 | D & D Oil Co. #2 | Post, TX 79356 | Oil & Gas Operator | Feb 2026 |
| 2819 | D & D Oil Company | Dayton, TX 77535 | Oil & Gas Operator | Feb 2026 |
| 2820 | D & D Well Service, L.L.C. | Post, TX 79356 | Oil Operator | Feb 2026 |
| 2821 | D & E Oil Co | Perryton, TX 79070 | Oil & Gas Operator | Feb 2026 |
| 2822 | D & G Company | Iraan, TX 79744 | Oil Operator | Apr 2006 |
| 2823 | D & G Operating Company, Inc. | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 2824 | D & H Investments | Jacksboro, TX 76458 | Oil & Gas Operator | Feb 2026 |
| 2825 | D & H Oil | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2022 |
| 2826 | D & H Production, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2024 |
| 2827 | D & J Oil Company | Kermit, TX 79745 | Oil & Gas Operator | Feb 2026 |
| 2828 | D & L Operating Co. | Bangs, TX 76823 | Oil & Gas Operator | Nov 2022 |
| 2829 | D & L Partnership | Rhome, TX 76078 | Oil Operator | May 1987 |
| 2830 | D & M Company | Rockdale, TX 76567 | Oil & Gas Operator | Mar 2008 |
| 2831 | D & N Oil Co. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 2832 | D & P Operating & Prod. Corp. | Cedar Park, TX 78613 | Oil & Gas Operator | Dec 2003 |
| 2833 | D & R Enterprises | Eastland, TX 76448 | Oil & Gas Operator | Oct 2020 |
| 2834 | D & S Oil Co. #1 | Borger, TX 79007 | Oil & Gas Operator | Feb 2026 |
| 2835 | D & S Oil Company | Corsicana, TX 75151 | Oil & Gas Operator | Feb 2026 |
| 2836 | D & V Oil Co., LP | San Angelo, TX 76909 | Oil & Gas Operator | Jan 2019 |
| 2837 | D & W Trucking Company | De Berry, TX 75639 | Oil Operator | Mar 2003 |
| 2838 | D And B Oil | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 2839 | D And N Natural Gas Op. Co. Inc. | Plano, TX 75075 | Oil & Gas Operator | Feb 2026 |
| 2840 | D C Energy, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2020 |
| 2841 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | Feb 2026 |
| 2842 | D G D Oil Co. | Imperial, TX 79743 | Oil & Gas Operator | Feb 2026 |
| 2843 | D J Production | Pasadena, TX 77502 | Oil & Gas Operator | Mar 2025 |
| 2844 | D L Operating | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 2845 | D&H-S-S Production Co.,Inc | Corpus Chrsti, TX 78409 | Oil & Gas Operator | Aug 2003 |
| 2846 | D&M Operating, L.L.C. | Corpus Chrsti, TX 78414 | Gas Operator | Feb 2026 |
| 2847 | D&S Oil And Gas Properties | San Angelo, TX 76902 | Oil & Gas Operator | Feb 2026 |
| 2848 | D-Bar Leasing, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2022 |
| 2849 | D-Mil Production Inc | Argyle, TX 76226 | Oil & Gas Operator | Feb 2026 |
| 2850 | D-S-B Properties, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2014 |
| 2851 | D-S-B Properties, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 2852 | D-T Development Company | Richardson, TX 75081 | Oil & Gas Operator | Sep 2002 |
| 2853 | D. & D. Operating Account | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2009 |
| 2854 | D. A. B. Oil Service, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Nov 2012 |
| 2855 | D. G. Oil Co. | Dennis, TX 76439 | Oil & Gas Operator | Feb 2026 |
| 2856 | D. O. G. Operating, LLC | Port Aransas, TX 78373 | Oil & Gas Operator | Feb 2026 |
| 2857 | D. Shel Oil, Inc. | Gonzales, TX 78629 | Oil Operator | Feb 2026 |
| 2858 | D.C. Oil | Natalia, TX 78059 | Oil Operator | Feb 2026 |
| 2859 | D.J. & T. Energy | Abilene, TX 79601 | Oil & Gas Operator | Feb 2026 |
| 2860 | D.J.F. Services, Inc. | Holdenville, OK 74848 | Oil & Gas Operator | Feb 2026 |
| 2861 | D.K.D. | Merkel, TX 79536 | Oil & Gas Operator | Feb 2026 |
| 2862 | D.N.I. | Bangs, TX 76823 | Oil & Gas Operator | Feb 2026 |
| 2863 | D.O.E. Energy | Palestine, TX 75801 | Oil & Gas Operator | Feb 2026 |
| 2864 | D.T. Inc. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 2865 | D.W.P. Production | Perryton, TX 79070 | Oil & Gas Operator | Nov 2020 |
| 2866 | D.Y. Exploration, Inc. | Boise, ID 83705 | Oil & Gas Operator | Feb 2026 |
| 2867 | D10 Energy LLC | Stinnett, TX 79083 | Oil & Gas Operator | Feb 2026 |
| 2868 | D90 Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 2869 | Da Crowe & Associates, Inc | Chappell Hill, TX 77426 | Oil & Gas Operator | Sep 2010 |
| 2870 | Dabb Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Aug 2020 |
| 2871 | Daco Oil | Joinerville, TX 75658 | Oil & Gas Operator | Aug 2019 |
| 2872 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Feb 2026 |
| 2873 | Dacott Oil & Gas, LLC | Pampa, TX 79065 | Oil & Gas Operator | Sep 2011 |
| 2874 | Daesung Energy Resources Inc. | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 2875 | Daf Operating, LLC | Houston, TX 77005 | Oil & Gas Operator | Feb 2026 |
| 2876 | Dahab Energy Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 2877 | Dahco Operating, LLC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Feb 2026 |
| 2878 | Dahlia Operating LLC | Petrolia, TX 76377 | Oil & Gas Operator | Apr 2018 |
| 2879 | Daily, Carroll | Loving, TX 76460 | Oil & Gas Operator | Sep 2023 |
| 2880 | Dain Oil | Graham, TX 76450 | Oil & Gas Operator | Dec 2007 |
| 2881 | Dakar Operating Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 2001 |
| 2882 | Dakota Oil Company | Hebbronville, TX 78361 | Oil & Gas Operator | Feb 2026 |
| 2883 | Dakota Resources, Inc | Midland, TX 79707 | Oil & Gas Operator | Nov 2025 |
| 2884 | Dakota Resources, Inc. (I) | Midland, TX 79707 | Oil & Gas Operator | Feb 2026 |
| 2885 | Dal-Long Oil Company | Longview, TX 75608 | Oil Operator | Feb 2001 |
| 2886 | Dale Operating Company | Dallas, TX 75207 | Oil & Gas Operator | Feb 2026 |
| 2887 | Dale Operations, LLC | Dickinson, TX 77539 | Oil & Gas Operator | Feb 2026 |
| 2888 | Dale, Doyle C. | Poolville, TX 76487 | Oil & Gas Operator | Sep 2018 |
| 2889 | Daleco Resources, Inc. | Lewisville, TX 75067 | Oil & Gas Operator | Mar 2008 |
| 2890 | Dalen Resources Oil & Gas Co | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 2891 | Dales Oil Company | Loving, TX 76460 | Oil Operator | Feb 2026 |
| 2892 | Dalf Energy LLC | Pampa, TX 79066 | Oil & Gas Operator | Feb 2026 |
| 2893 | Dallas Operating Corp. | Dallas, TX 75205 | Oil & Gas Operator | Nov 2006 |
| 2894 | Dallas Petroleum Group, LLC | Dallas, TX 75379 | Oil & Gas Operator | Feb 2026 |
| 2895 | Dallas Production Company LLC | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 2896 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 2897 | Dallas Resources, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Dec 1997 |
| 2898 | Dallas Royalty, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2012 |
| 2899 | Dally'S Oil Co. LLC | Monahans, TX 79756 | Oil Operator | Feb 2026 |
| 2900 | Dalport Oil Corporation | Dallas, TX 75202 | Oil & Gas Operator | Apr 1993 |