| 2801 | D. Shel Oil, Inc. | Gonzales, TX 78629 | Oil Operator | Apr 2025 |
| 2802 | D. W. R. Oil Co., Inc. | Merkel, TX 79536 | Oil & Gas Operator | Apr 2025 |
| 2803 | D.C. Oil | Natalia, TX 78059 | Oil Operator | Apr 2025 |
| 2804 | D.J. & T. Energy | Abilene, TX 79601 | Oil & Gas Operator | Apr 2025 |
| 2805 | D.J.F. Services, Inc. | Holdenville, OK 74848 | Oil & Gas Operator | Apr 2025 |
| 2806 | D.K.D. | Merkel, TX 79536 | Oil & Gas Operator | Apr 2025 |
| 2807 | D.N.I. | Bangs, TX 76823 | Oil & Gas Operator | Apr 2025 |
| 2808 | D.O.E. Energy | Palestine, TX 75801 | Oil & Gas Operator | Apr 2025 |
| 2809 | D.T. Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 2810 | D.W.P. Production | Perryton, TX 79070 | Oil & Gas Operator | Nov 2020 |
| 2811 | D.Y. Exploration, Inc. | Boise, ID 83705 | Oil & Gas Operator | Apr 2025 |
| 2812 | D10 Energy LLC | Stinnett, TX 79083 | Oil & Gas Operator | Apr 2025 |
| 2813 | D90 Energy, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2025 |
| 2814 | Da Crowe & Associates, Inc | Chappell Hill, TX 77426 | Oil & Gas Operator | Sep 2010 |
| 2815 | Dabb Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Aug 2020 |
| 2816 | Daco Oil | Joinerville, TX 75658 | Oil & Gas Operator | Aug 2019 |
| 2817 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2025 |
| 2818 | Dacott Oil & Gas, LLC | Pampa, TX 79065 | Oil & Gas Operator | Sep 2011 |
| 2819 | Daesung Energy Resources Inc. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2025 |
| 2820 | Daf Operating, LLC | Houston, TX 77005 | Oil & Gas Operator | Apr 2025 |
| 2821 | Dahab Energy Inc. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2025 |
| 2822 | Dahco Operating, LLC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Apr 2025 |
| 2823 | Dahlia Operating LLC | Petrolia, TX 76377 | Oil & Gas Operator | Apr 2018 |
| 2824 | Daily, Carroll | Loving, TX 76460 | Oil & Gas Operator | Sep 2023 |
| 2825 | Dain Oil | Graham, TX 76450 | Oil & Gas Operator | Dec 2007 |
| 2826 | Dakar Operating Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 2001 |
| 2827 | Dakota Oil Company | Hebbronville, TX 78361 | Oil & Gas Operator | Apr 2025 |
| 2828 | Dakota Resources, Inc | Midland, TX 79707 | Oil & Gas Operator | Jan 2025 |
| 2829 | Dakota Resources, Inc. (I) | Midland, TX 79707 | Oil & Gas Operator | Apr 2025 |
| 2830 | Dale Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 2831 | Dale Operations, LLC | Dickinson, TX 77539 | Oil & Gas Operator | Apr 2025 |
| 2832 | Dale, Doyle C. | Poolville, TX 76487 | Oil & Gas Operator | Sep 2018 |
| 2833 | Daleco Resources, Inc. | Lewisville, TX 75067 | Oil & Gas Operator | Mar 2008 |
| 2834 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 2835 | Dales Oil Company | Loving, TX 76460 | Oil Operator | Apr 2025 |
| 2836 | Dalf Energy LLC | Pampa, TX 79066 | Oil & Gas Operator | Apr 2025 |
| 2837 | Dallas Operating Corp. | Dallas, TX 75205 | Oil & Gas Operator | Nov 2006 |
| 2838 | Dallas Petroleum Group, LLC | Dallas, TX 75379 | Oil & Gas Operator | Apr 2025 |
| 2839 | Dallas Production Company LLC | Dallas, TX 75206 | Oil & Gas Operator | Apr 2025 |
| 2840 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 2841 | Dallas Resources, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Dec 1997 |
| 2842 | Dallas Royalty, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2012 |
| 2843 | Dalport Oil Corporation | Dallas, TX 75202 | Oil & Gas Operator | Apr 1993 |
| 2844 | Dameron Petroleum Corp. | Midland, TX 79708 | Oil & Gas Operator | Apr 2025 |
| 2845 | Damron Energy | Eden, TX 76837 | Oil & Gas Operator | Jan 2015 |
| 2846 | Damron Energy, LLC | Eden, TX 76837 | Oil & Gas Operator | Apr 2025 |
| 2847 | Dan A. Hughes Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | Feb 2025 |
| 2848 | Dan Texas Company | Waco, TX 76710 | Oil & Gas Operator | Sep 1998 |
| 2849 | Danco Oil & Gas | White Deer, TX 79097 | Oil & Gas Operator | Aug 2013 |
| 2850 | Daniel Explorations Inc | Georgetown, TX 78627 | Oil & Gas Operator | Apr 2009 |
| 2851 | Daniel Mineral Development, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2007 |
| 2852 | Daniel Oil & Gas | Granbury, TX 76049 | Oil & Gas Operator | Oct 2010 |
| 2853 | Daniels Corporation, The | Seabrook, TX 77586 | Oil & Gas Operator | Apr 2025 |
| 2854 | Daniels Energy | Pampa, TX 79066 | Oil & Gas Operator | Apr 2025 |
| 2855 | Daniels Petroleum Co | Denver, CO 80202 | Oil & Gas Operator | Mar 2003 |
| 2856 | Daniels, C. W. | Stockdale, TX 78160 | Oil & Gas Operator | Dec 2009 |
| 2857 | Daniels, Earlene | Follett, TX 79034 | Oil & Gas Operator | Feb 2002 |
| 2858 | Daniels, J.C. Energy | Pampa, TX 79066 | Oil & Gas Operator | Apr 2001 |
| 2859 | Danmark Energy Services, Inc. | White Oak, TX 75693 | Oil & Gas Operator | Apr 2021 |
| 2860 | Dantex Oil & Gas, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 2861 | Dao Oil And Gas | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Apr 2025 |
| 2862 | Dara Operating Company, LLC | Electra, TX 76360 | Oil & Gas Operator | Apr 2025 |
| 2863 | Darco Operators | Big Lake, TX 76932 | Oil & Gas Operator | Apr 2025 |
| 2864 | Dark Canyon Resources LLC | Refugio, TX 78377 | Oil Operator | Apr 2025 |
| 2865 | Dark Horse Operating Co., L.L.C. | Denton, TX 76202 | Oil & Gas Operator | Oct 2022 |
| 2866 | Dark Horse Producing Of TX, L.P. | Alice, TX 78333 | Oil & Gas Operator | Apr 2025 |
| 2867 | Darkens Oil & Gas Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Apr 2025 |
| 2868 | Darley Enterprises, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Jan 2012 |
| 2869 | Darr-Hey Oil, LLC | Iowa Park, TX 76367 | Oil & Gas Operator | Apr 2025 |
| 2870 | Darrah Oil Company LLC | Wichita, KS 67201 | Oil & Gas Operator | Apr 2025 |
| 2871 | Darst Creek Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Mar 2021 |
| 2872 | Dart Oil & Gas Corporation | Mason, MI 48854 | Oil & Gas Operator | Jun 2018 |
| 2873 | Dartex Energy Corporation | Austin, TX 78746 | Oil & Gas Operator | Apr 2025 |
| 2874 | Dartex Energy Inc | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 2875 | Das Oil Co. L.L.C. | Post, TX 79356 | Oil Operator | Apr 2025 |
| 2876 | Dasbek Energy, L.L.C. | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2025 |
| 2877 | Dash Production Company, Inc. | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Apr 2025 |
| 2878 | Daubert Operating, L.L.C. | San Antonio, TX 78209 | Oil Operator | Apr 2025 |
| 2879 | Davco Oil LLC | Fort Worth, TX 76108 | Oil & Gas Operator | Apr 2025 |
| 2880 | Davcro Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Dec 2003 |
| 2881 | Davenport Oil Company | Luling, TX 78648 | Oil & Gas Operator | Dec 1996 |
| 2882 | Davenport, Vernon | Shamrock, TX 79079 | Oil & Gas Operator | Mar 2008 |
| 2883 | Davenport, Vernon Prod. Co. | Dumas, TX 79029 | Oil & Gas Operator | Jan 2002 |
| 2884 | David, Phillip | Lawrenceville, IL 62439 | Oil & Gas Operator | Apr 2025 |
| 2885 | Davidson Production Company, LLC | Bertram, TX 78605 | Oil Operator | Apr 2025 |
| 2886 | Davidson, Dan | Ozona, TX 76943 | Oil & Gas Operator | Apr 2025 |
| 2887 | Davidson, Grover R. | Bertram, TX 78605 | Oil & Gas Operator | Apr 2025 |
| 2888 | Davis & Carr Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Jun 1994 |
| 2889 | Davis & Davis Machine Shop, Inc. | Bowie, TX 76230 | Oil & Gas Operator | Apr 2025 |
| 2890 | Davis & Salmon | Muenster, TX 76252 | Oil & Gas Operator | Oct 2017 |
| 2891 | Davis Asset Management, Inc. | Houston, TX 77010 | Oil & Gas Operator | Dec 2004 |
| 2892 | Davis Bros. Oil Producers, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2020 |
| 2893 | Davis Energy Services LLC | La Grange, TX 78945 | Oil Operator | Apr 2025 |
| 2894 | Davis Enterprises | Abilene, TX 79608 | Oil & Gas Operator | Aug 1998 |
| 2895 | Davis Gulf Coast, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 2896 | Davis Oil & Gas, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2011 |
| 2897 | Davis Operating Company | Elysian Field, TX 75642 | Oil & Gas Operator | Apr 2025 |
| 2898 | Davis Petroleum Corp. | Houston, TX 77027 | Oil & Gas Operator | Apr 2025 |
| 2899 | Davis Preservation Oil Trust | Denver, CO 80206 | Gas Operator | Mar 1998 |
| 2900 | Davis Southern Operating Co LLC | Houston, TX 77004 | Oil & Gas Operator | Apr 2025 |