| 2901 | BKN Oil & Gas, Inc. | Port Lavaca, TX 77979 | Gas Operator | Aug 1997 |
| 2902 | BKR Operating LLC | Ripley, OK 74062-6524 | Oil & Gas Operator | Jul 2025 |
| 2903 | BKV Barnett II, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Sep 2026 |
| 2904 | BKV Barnett, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Sep 2026 |
| 2905 | BKV North Texas, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Sep 2026 |
| 2906 | BKV Opr LLC | Tunkhannock, PA 18657 | Gas Operator | Jun 2026 |
| 2907 | BKV Ventures, LLC | | Oil & Gas Operator | Nov 2020 |
| 2908 | Black & White Oper. | Thayer, KS 66776 | Oil Operator | Aug 1998 |
| 2909 | Black Arrow Operating, LLC | Dennis, TX 76439 | Oil & Gas Operator | Sep 2026 |
| 2910 | Black Aubrey C | Dallas, TX 75206 | Oil & Gas Operator | Nov 2002 |
| 2911 | Black Badger Energy LLC. | | Oil Operator | Jul 2026 |
| 2912 | Black Bandana LLC | Santo, TX 76472 | Oil & Gas Operator | Apr 2026 |
| 2913 | Black Bank LLC | Billings, MT 59103 | Oil Operator | Jun 2026 |
| 2914 | Black Bayou Gas Processing, Inc. | | Oil Operator | Dec 2024 |
| 2915 | Black Bayou Gas Systems, Inc. | | Oil Operator | Feb 2009 |
| 2916 | Black Bayou Management Co Inc. | | Oil & Gas Operator | Aug 1980 |
| 2917 | Black Bayou Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2025 |
| 2918 | Black Bayou Petroleum | | Oil Operator | Jul 1999 |
| 2919 | Black Bayou Resources, Inc. | | Oil & Gas Operator | Jun 1992 |
| 2920 | Black Bear Midstream LLC | | Oil Operator | Jan 2025 |
| 2921 | Black Bear Oil Corporation | Las Vegas, NV 89128 | Oil & Gas Operator | Jul 2026 |
| 2922 | Black Bear Properties LLC | Oklahoma City, OK 73156-1904 | Oil & Gas Operator | Feb 2013 |
| 2923 | Black Belt Operating, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Sep 2026 |
| 2924 | Black Boar Operating LLC | Canadian, TX 79014 | Oil & Gas Operator | Sep 2026 |
| 2925 | Black Coal Resources Company | Fort Washakie, WY 82514 | Oil & Gas Operator | Dec 1991 |
| 2926 | Black Creek Exploration LLC | Healdton, OK 73438 | Oil & Gas Operator | Jun 2026 |
| 2927 | Black Creek Oil Company, LLC | Yancey, TX 78886 | Oil Operator | Sep 2026 |
| 2928 | Black Creek Production Co., Inc. | Driftwood, TX 78619 | Oil & Gas Operator | Feb 2000 |
| 2929 | Black Dahlia Oil & Gas Co. | Glendale, CA 91208 | Oil Operator | Apr 2026 |
| 2930 | Black Diamond Energy Inc | Pittsburgh, PA 15237 | Gas Operator | May 2016 |
| 2931 | Black Diamond Energy Of Delaware Inc | Buffalo, WY 82834 | Oil & Gas Operator | Jun 2026 |
| 2932 | Black Diamond Energy, LLC | | Oil & Gas Operator | Oct 2008 |
| 2933 | Black Diamond Oi | | Oil Operator | Dec 1996 |
| 2934 | Black Diamond Oil, Inc. | Hays, KS 67601 | Oil Operator | Apr 2019 |
| 2935 | Black Diamond Operating Co., LLC | Kilgore, TX 75662 | Oil & Gas Operator | Sep 2009 |
| 2936 | Black Diamond Production Co. | | Oil & Gas Operator | Mar 2021 |
| 2937 | Black Dome Energ | | Oil & Gas Operator | Dec 1996 |
| 2938 | Black Dome Energy Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 2939 | Black Dot Oil Inc | Skiatook, OK 74070 | Oil & Gas Operator | May 2026 |
| 2940 | Black Draw Energy LLC | Cypress, TX 77433 | Oil & Gas Operator | Sep 2026 |
| 2941 | Black Elk Energy Offshore Op LLC | Corpus Christ, TX 78401 | Oil & Gas Operator | Sep 2026 |
| 2942 | Black Elk Energy Offshore Operations LLC | | Oil & Gas Operator | Jun 2016 |
| 2943 | Black Energy LLC | Okmulgee, OK 74447 | Oil Operator | May 2026 |
| 2944 | Black Frank J | | Oil & Gas Operator | Jan 1994 |
| 2945 | Black Gold Energy LLC | Jenks, OK 74037 | Oil Operator | Jun 2024 |
| 2946 | Black Gold Oil Co Dba C & L Expl Co | St Louis, MO 63304 | Oil Operator | Dec 2023 |
| 2947 | Black Gold Oil Company | Duncan, OK 73533-1581 | Oil & Gas Operator | Jul 2026 |
| 2948 | Black Gold Operating Co, LLC | Plntersville, TX 77363 | Oil & Gas Operator | Sep 2026 |
| 2949 | Black Gold Petroleum, LLC | Alice, TX 78333 | Oil Operator | Sep 2026 |
| 2950 | Black Gold Prod Co., Inc. | | Oil & Gas Operator | Feb 1998 |
| 2951 | Black Gold Properties | Lubbock, TX 79424 | Oil & Gas Operator | Feb 1999 |
| 2952 | Black Gold Resources LLC | Houston, TX 77056 | Oil Operator | Sep 2013 |
| 2953 | Black Gold Services Inc | Casper, WY 82644 | Oil & Gas Operator | Jun 2026 |
| 2954 | Black Gold Well Service | San Angelo, TX 76901 | Oil & Gas Operator | Sep 2026 |
| 2955 | Black Gold Well Service, Inc. | Towanda, KS 67144 | Oil Operator | Dec 2019 |
| 2956 | Black Hawk Petro | | Oil Operator | Dec 1993 |
| 2957 | Black Hawk Resources | | Oil & Gas Operator | Dec 1984 |
| 2958 | Black Hawk Resources Corporation | Denver, CO 80202 | Oil Operator | Mar 1986 |
| 2959 | Black Hawk Resources, LLC | Bowman, ND 58623 | Oil & Gas Operator | Jun 2011 |
| 2960 | Black Hills Exploration & Production Inc | Newcastle, WY 82701 | Oil & Gas Operator | Mar 2018 |
| 2961 | Black Hills Gas Resources, Inc. | Rapid City, SD 57702 | Oil & Gas Operator | Aug 2018 |
| 2962 | Black Hills Plateau Production LLC | | Gas Operator | Sep 2016 |
| 2963 | Black Hills Wyoming Gas LLC | Rapid City, SD 57709 | Gas Operator | Jul 2026 |
| 2964 | Black Horse Resources, LLC | Oklahoma City, OK 73112 | Oil & Gas Operator | Sep 2024 |
| 2965 | Black Jack Oil Co Inc | Holliday, TX 76366 | Oil & Gas Operator | May 2026 |
| 2966 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | Sep 2026 |
| 2967 | Black Jack Well Service, Inc. | Somerset, TX 78069 | Oil & Gas Operator | Aug 2003 |
| 2968 | Black Jewel Resources LTD Co | Berryville, AR 72616-0538 | Oil & Gas Operator | Dec 2014 |
| 2969 | Black Lava Operating LLC | | Oil & Gas Operator | May 2026 |
| 2970 | Black Mesa Energy LLC | Tulsa, OK 74103-4334 | Oil & Gas Operator | May 2026 |
| 2971 | Black Mountain Oil & Gas II LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2021 |
| 2972 | Black Mountain Oil Co. | | Oil & Gas Operator | Dec 1999 |
| 2973 | Black Mountain Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 2974 | Black Mountain Petroleum | Mogadore, OH 44260 | Oil & Gas Operator | Dec 2025 |
| 2975 | Black Mountain STX I LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 2976 | Black Mountain SWD LP | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 2977 | Black Oak Exploration, LLC | Denver, CO 80210 | Oil & Gas Operator | Apr 2026 |
| 2978 | Black Oak Operating LLC | Conroe, TX 77384 | Oil & Gas Operator | Sep 2026 |
| 2979 | Black Oil Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 2980 | Black Pearl Exploration, L.L.C. | Houston, TX 77095 | Oil & Gas Operator | May 2015 |
| 2981 | Black Pearl Operating Comp., LLC | Houston, TX 77057 | Oil Operator | Sep 2026 |
| 2982 | Black Petroleum | | Oil Operator | Sep 1989 |
| 2983 | Black Petroleum Company | Wichita, KS 67277 | Oil Operator | Jan 2004 |
| 2984 | Black Pool Energy, LP | Houston, TX 77070 | Oil & Gas Operator | Jul 2024 |
| 2985 | Black Resources | Borger, TX 79008 | Oil & Gas Operator | Sep 2026 |
| 2986 | Black Resources, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Mar 2008 |
| 2987 | Black River Oil Corp And Golden Petroleum Corp | | Oil & Gas Operator | Dec 1989 |
| 2988 | Black River Operating LLC | Keller, TX 76248 | Oil & Gas Operator | Sep 2026 |
| 2989 | Black Rock Resources, LLC | Russell, KS 67665 | Oil Operator | Apr 2026 |
| 2990 | Black Sable Energy, LLC | San Antonio, TX 78209 | Oil Operator | Jan 2018 |
| 2991 | Black Sheep Oil & Gas LLC | Odessa, TX 79768 | Oil & Gas Operator | Sep 2026 |
| 2992 | Black Sheep Operating, LLC | Amarillo, TX 79109 | Oil & Gas Operator | Sep 2026 |
| 2993 | Black Snake Petroleum, LLC | | Oil & Gas Operator | Jun 2026 |
| 2994 | Black Spot Oil Company, A General Partnership | Great Bend, KS 67530 | Oil Operator | Dec 2009 |
| 2995 | Black Star Energy Inc | | Oil Operator | May 2004 |
| 2996 | Black Star Oil Company | Plano, TX 75094 | Oil & Gas Operator | Sep 2026 |
| 2997 | Black Star Petro | | Oil Operator | Jul 1995 |
| 2998 | Black Star Petroleum Corp. | Oceanside, NY 11572 | Oil Operator | Oct 1997 |
| 2999 | Black Stone Energy Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2004 |
| 3000 | Black Stone Energy Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |