| 2901 | Davis Oil & Gas, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2011 |
| 2902 | Davis Operating Company | Elysian Field, TX 75642 | Oil & Gas Operator | Dec 2025 |
| 2903 | Davis Petroleum Corp. | Houston, TX 77027 | Oil & Gas Operator | Dec 2025 |
| 2904 | Davis Preservation Oil Trust | Denver, CO 80206 | Gas Operator | Mar 1998 |
| 2905 | Davis Southern Operating Co LLC | Houston, TX 77004 | Oil & Gas Operator | Dec 2025 |
| 2906 | Davis, A. L. Production Co.,Inc. | Van Vleck, TX 77482 | Oil & Gas Operator | Aug 2003 |
| 2907 | Davis, C. O. Production Co. | Bay City, TX 77414 | Oil & Gas Operator | Dec 2025 |
| 2908 | Davis, D. D. Estate Of | Borger, TX 79008 | Oil & Gas Operator | Jul 1998 |
| 2909 | Davis, Don Oil Co. | Nocona, TX 76255 | Oil & Gas Operator | Dec 2025 |
| 2910 | Davis, Gowin | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2001 |
| 2911 | Davis, J. R. Oil Company | Sweeny, TX 77480 | Oil & Gas Operator | Dec 2025 |
| 2912 | Davis, Joe D. | Fort Smith, AR 72903 | Gas Operator | Mar 2015 |
| 2913 | Davis, Kelly J. | Muenster, TX 76252 | Oil Operator | Dec 2025 |
| 2914 | Davis, Larry D. | Boling, TX 77420 | Oil & Gas Operator | Dec 2025 |
| 2915 | Davis, Odis Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Dec 2000 |
| 2916 | Davis, Paul Pipe & Supply Inc. | Abilene, TX 79606 | Oil & Gas Operator | Feb 2001 |
| 2917 | Davis, R. E. Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2015 |
| 2918 | Davis, Randy | Perryton, TX 79070 | Oil & Gas Operator | Jun 2017 |
| 2919 | Davis, Robert E. | Graham, TX 76450 | Oil & Gas Operator | Apr 1997 |
| 2920 | Davis, Roland C. | Hardin, TX 77561 | Oil & Gas Operator | May 1997 |
| 2921 | Davis, Sammy | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 2922 | Davis, Tommy | Hebbronville, TX 78361 | Oil & Gas Operator | Jun 1995 |
| 2923 | Davis, Travis H. | Spearman, TX 79081 | Oil & Gas Operator | Jul 2003 |
| 2924 | Davis, Travis H. Gas | Spearman, TX 79081 | Oil & Gas Operator | Dec 2025 |
| 2925 | Davis, William H. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2014 |
| 2926 | Dawkins Energies, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Dec 2025 |
| 2927 | Dawn Oil & Gas Operators Inc. | Borger, TX 79007 | Oil & Gas Operator | Dec 2025 |
| 2928 | Dawsey Operating Company | Georgetown, TX 78628 | Oil & Gas Operator | Mar 2016 |
| 2929 | Dawson Geophysical Company | Midland, TX 79701 | Oil Operator | Aug 2024 |
| 2930 | Dawson Operating Company | Midland, TX 79702 | Oil & Gas Operator | Dec 1994 |
| 2931 | Dawson, B G Oil & Gas LTD | Dallas, TX 75205 | Oil & Gas Operator | Jul 2024 |
| 2932 | Dawson-Markwell Exploration Co. | Oklahoma City, OK 73101 | Oil & Gas Operator | Oct 2025 |
| 2933 | Day Resources, Inc. | Midland, TX 79707 | Oil & Gas Operator | Aug 1994 |
| 2934 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Dec 2025 |
| 2935 | Daystar Operating Company, LLC | Austin, TX 78750 | Oil & Gas Operator | Apr 2008 |
| 2936 | DB Resources, LLC | Houston, TX 77019 | Oil & Gas Operator | Dec 2025 |
| 2937 | DBC Operating Company LLC | Midlothian, TX 76065 | Oil & Gas Operator | Dec 2025 |
| 2938 | Dbo Oil Incorporated | Georgetown, TX 78628 | Oil & Gas Operator | Dec 2025 |
| 2939 | DBP Exploration, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2025 |
| 2940 | DCDC, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2003 |
| 2941 | DCP Midstream, LP | Denver, CO 80237 | Oil Operator | Nov 2006 |
| 2942 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 2943 | DCS Energy | Throckmorton, TX 76483 | Oil Operator | Dec 2025 |
| 2944 | DDC Energy Corporation | Marietta, GA 30068 | Oil & Gas Operator | Mar 1997 |
| 2945 | DDC Production Company | Archer City, TX 76351 | Oil Operator | Dec 2025 |
| 2946 | DDC Track, LLC | Bushland, TX 79012 | Oil Operator | Dec 2025 |
| 2947 | DDD Exploration, Inc. | Amarillo, TX 79109 | Oil & Gas Operator | Dec 2025 |
| 2948 | De Central Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2025 |
| 2949 | De Compiegne Prop. Co. 20, The | Midland, TX 79702 | Oil Operator | Oct 2019 |
| 2950 | De IV Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 2951 | De La Torre Oil & Gas, Inc | McAllen, TX 78501 | Oil & Gas Operator | Dec 2025 |
| 2952 | De Larios, R. V., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 2953 | De Operating LLC | Austin, TX 78701 | Oil & Gas Operator | Apr 2017 |
| 2954 | De V Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2025 |
| 2955 | De-Vac Inc. | Daisetta, TX 77533 | Oil Operator | Dec 2025 |
| 2956 | De3 Operating LLC | Irving, TX 75038 | Oil & Gas Operator | Jun 2021 |
| 2957 | Deagen, Bill & Sons, LTD. | Stockdale, TX 78160 | Oil Operator | May 2018 |
| 2958 | Dean Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 2019 |
| 2959 | Deanlake Operator, L.L.C. | Houston, TX 77010 | Oil & Gas Operator | Sep 2011 |
| 2960 | Dearing, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2021 |
| 2961 | Deck Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2020 |
| 2962 | Decker Operating Co., L.L.C. | Houston, TX 77008 | Oil & Gas Operator | Dec 2025 |
| 2963 | Decleva, Paul | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2020 |
| 2964 | Deco | Kilgore, TX 75662 | Oil & Gas Operator | Jan 1999 |
| 2965 | Dedica Energy Corporation | Mattoon, IL 61938 | Oil & Gas Operator | Mar 2008 |
| 2966 | Dee'S Oil | Wellington, TX 79095 | Oil & Gas Operator | Mar 2008 |
| 2967 | Dee-Jay Exploration Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2025 |
| 2968 | Deen Drilling Company | Archer City, TX 76351 | Oil & Gas Operator | Dec 2025 |
| 2969 | Deep Gully Oil LLC | Houston, TX 77292 | Oil Operator | Dec 2025 |
| 2970 | Deep Reef Industries | Amarillo, TX 79101 | Oil & Gas Operator | Jan 2004 |
| 2971 | Deep Rock Resources, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 2972 | Defranco Oil Account | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2004 |
| 2973 | Deg Energy, Inc. | Magnolia, TX 77354 | Oil & Gas Operator | Feb 2007 |
| 2974 | Deguello Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 2975 | Dekalb Energy Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 1996 |
| 2976 | Del Mar | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 2977 | Del Mar Energy, Inc. | Van Alstyne, TX 75495 | Oil & Gas Operator | Dec 2025 |
| 2978 | Del Mar Exploration Company | Houston, TX 77006 | Oil & Gas Operator | Jan 2014 |
| 2979 | Del Petroleum Corporation | Dallas, TX 75219 | Oil & Gas Operator | Jan 2012 |
| 2980 | Del Rio Production Co. | Gainesville, TX 76240 | Oil Operator | Mar 2019 |
| 2981 | Delaney Oil And Gas Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 2982 | Delaware Davis Petroleum Corp. | Houston, TX 77056 | Oil & Gas Operator | Jan 2000 |
| 2983 | Delaware Ecco Petroleum Inc. | Rockwall, TX 75087 | Oil & Gas Operator | Jul 2001 |
| 2984 | Delcar, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1995 |
| 2985 | Delco Operating Company LP | Houston, TX 77056 | Oil & Gas Operator | May 2020 |
| 2986 | Delek Energy Systems Us, Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2011 |
| 2987 | Delfin Operating, LLC | Dallas, TX 75243 | Oil & Gas Operator | Dec 2025 |
| 2988 | Delgado, Emil A | San Antonio, TX 78223 | Oil & Gas Operator | Sep 2016 |
| 2989 | Delhi Gas Pipeline Corporation | Palestine, TX 75802 | Oil & Gas Operator | Feb 1998 |
| 2990 | Delmar Operating, Inc. | Houston, TX 77010 | Oil & Gas Operator | Oct 1996 |
| 2991 | Delray Oil, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2025 |
| 2992 | Delta C02, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2021 |
| 2993 | Delta Exploration Company Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 2994 | Delta Exploration, LLC | Fredericksbrg, TX 78624 | Oil Operator | Dec 2025 |
| 2995 | Delta Hydrocarbons, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Sep 1997 |
| 2996 | Delta Oil | Holliday, TX 76366 | Oil & Gas Operator | Sep 2005 |
| 2997 | Delta Oil & Gas Company | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2003 |
| 2998 | Delta Oil & Gas LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 2999 | Delta Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 3000 | Deltex Minerals Inc. | Peachtree Cty, GA 30269 | Oil & Gas Operator | Dec 2025 |