| 2901 | Hughes Gas Systems LLC | Dallas, TX 75214 | Oil & Gas Operator | Jan 2025 |
| 2902 | Hughes George B | Asher, OK 74826-0165 | Oil & Gas Operator | Mar 2011 |
| 2903 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 2904 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 2905 | Huitt Joe A Rev Trust | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2009 |
| 2906 | Hulen Operating Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 2907 | Hull Enterprises Inc | Broken Arrow, OK 74012 | Oil & Gas Operator | Sep 2023 |
| 2908 | Hull Oil Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2021 |
| 2909 | Hulse Steve & Frank | Pawhuska, OK 74056 | Oil & Gas Operator | Aug 2000 |
| 2910 | Hulsey Larry O & Co | Graham, TX 76046 | Oil & Gas Operator | Jun 2012 |
| 2911 | Humphrey Mark | Morris, OK 74445-2816 | Oil & Gas Operator | Sep 2021 |
| 2912 | Hungerford Oil & Gas Inc | Helena, OK 73741 | Oil & Gas Operator | Nov 2000 |
| 2913 | Hunt Brothers Producing Co Inc | Redding, CA 96049-2516 | Oil & Gas Operator | Sep 2012 |
| 2914 | Hunt Chris Water Hauling Contractor Inc | Keyes, OK 73947-0004 | Oil Operator | Jun 2008 |
| 2915 | Hunt Energy Corporation | | Oil & Gas Operator | Feb 2002 |
| 2916 | Hunt Engineering Inc | Norman, OK 73069-4093 | Oil & Gas Operator | Feb 2019 |
| 2917 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 2918 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 2919 | Hunt, H L | Dallas, TX 75202-2785 | Oil & Gas Operator | Feb 2020 |
| 2920 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 2921 | Huntington Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2006 |
| 2922 | Hunton Oil & Gas Corporation | Oklahoma City, OK 73154-0191 | Oil & Gas Operator | May 2019 |
| 2923 | Hunton Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2025 |
| 2924 | Hurd Gary Oil Co | Wynona, OK 74084 | Oil & Gas Operator | Jan 2025 |
| 2925 | Hurd J Oil LLC | Bartlesville, OK 74003 | Oil Operator | Jan 2025 |
| 2926 | Hurd Oil Company | | Oil & Gas Operator | Jun 2015 |
| 2927 | Hurley Charles B | Santa Ana, CA 92706 | Oil & Gas Operator | Apr 2015 |
| 2928 | Hurricane Energy Corporation | | Oil & Gas Operator | Dec 2000 |
| 2929 | Hurst Oil Investments Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Feb 2015 |
| 2930 | Husky Petroleum | Seminole, OK 74818-1181 | Oil Operator | Feb 2012 |
| 2931 | Husky Ventures Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2025 |
| 2932 | Hutton Gas Operating Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 2933 | Hux Oil Company LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jan 2025 |
| 2934 | Hy-Carb Energy Inc | | Oil & Gas Operator | Feb 2009 |
| 2935 | Hyalite Energy Corporation | Pampa, TX 79066 | Oil & Gas Operator | Jan 2025 |
| 2936 | Hydrocarbon Management, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 1996 |
| 2937 | Hydrocarbon Technology Services | | Oil & Gas Operator | Dec 2000 |
| 2938 | Hylmn LLC | Wills Point, TX 75169 | Oil Operator | Jun 2022 |
| 2939 | Hyperion Energy LP | Dallas, TX 75206 | Oil & Gas Operator | May 2014 |
| 2940 | Hyperion Oil & Gas LLC | Dallas, TX 75251 | Oil & Gas Operator | Apr 2025 |
| 2941 | I C Gas Amcana Inc | Tulsa, OK 74103-3713 | Oil & Gas Operator | Apr 1996 |
| 2942 | I D Oil Company Inc | Sperry, OK 74073-9417 | Oil Operator | Jan 2013 |
| 2943 | I T Enterprises Inc | Tulsa, OK 74170-0775 | Oil & Gas Operator | Mar 2011 |
| 2944 | I-Mac Petroleum Service Inc | Bixby, OK 74008-3778 | Oil & Gas Operator | Apr 2020 |
| 2945 | Iacx Energy LLC | Dallas, TX 75240 | Oil & Gas Operator | Feb 2025 |
| 2946 | Icon Energy Company | Oklahoma City, OK 73156-1613 | Oil & Gas Operator | Jan 2025 |
| 2947 | Icor Oil & Gas Of Okla LTD | Claremore, OK 74018-2132 | Oil & Gas Operator | Mar 2015 |
| 2948 | Iep Kansas Gas, LLC | Burlington, CO 80807 | Oil & Gas Operator | Feb 2025 |
| 2949 | Igleheart Warren | Edmond, OK 73034-8964 | Oil & Gas Operator | Jun 2016 |
| 2950 | Ike Energy LLC | Stillwater, OK 74074-1745 | Oil & Gas Operator | Jan 2025 |
| 2951 | Ikenberry Herman & Ikenberry | | Oil Operator | Jul 1999 |
| 2952 | Illoma Oil Company Inc | Algonquin, IL 60102-1825 | Oil & Gas Operator | Mar 2015 |
| 2953 | Imhoff David | Stroud, OK 74079-9725 | Oil & Gas Operator | Nov 2018 |
| 2954 | Impact Energy Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Feb 2025 |
| 2955 | Imperial Petroleum, Inc. | Evansville, IN 47725 | Oil & Gas Operator | Jan 2005 |
| 2956 | Inca Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2009 |
| 2957 | Incline Production Company | Edmond, OK 73083 | Oil & Gas Operator | Mar 2014 |
| 2958 | Inda Oil Unlimited | Dewey, OK 74029 | Oil Operator | Dec 2023 |
| 2959 | Indian Nation Energy Company | Wewoka, OK 74884-3456 | Oil & Gas Operator | Apr 2020 |
| 2960 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2025 |
| 2961 | Indian Territory Operating LLC | Salado, TX 76571 | Oil & Gas Operator | Jan 2024 |
| 2962 | Indian Wells Oil Co | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2000 |
| 2963 | Indianola Oil Inc | Bartlesville, OK 74005 | Oil & Gas Operator | Aug 2000 |
| 2964 | Indrex Inc | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2000 |
| 2965 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 2966 | Infinity Hydrocarbons LLC | Houston, TX 77079 | Oil & Gas Operator | Aug 2022 |
| 2967 | Infinity Oil & Gas Inc | Nowata, OK 74048 | Oil Operator | Jun 1993 |
| 2968 | Ingersol Rosinbaum Oil Inc | Boerne, TX 78006 | Oil & Gas Operator | Jan 2025 |
| 2969 | Ingersoll Oil Inc | Hominy, OK 74035 | Oil & Gas Operator | Jun 2000 |
| 2970 | Ingram Exploration Inc | Seminole, OK 74868 | Oil & Gas Operator | Feb 2025 |
| 2971 | Injection Well Service | Lone Grove, OK 73443-0156 | Oil Operator | Apr 2005 |
| 2972 | Inland Oil Corporation | Sapulpa, OK 74066 | Oil & Gas Operator | Jan 2025 |
| 2973 | Inland Operating Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 2974 | Inman Oil LLC | Ruidoso, NM 88355 | Oil Operator | Feb 2025 |
| 2975 | Integrated Energy Service Corp | Cleveland, OK 74020 | Oil & Gas Operator | Nov 1998 |
| 2976 | Inter-States Oil & Gas Inc | Edmond, OK 73003-0023 | Oil & Gas Operator | Apr 2020 |
| 2977 | Intergrated Drill & Expl Inc | Tulsa, OK 74136-1071 | Oil & Gas Operator | Sep 1994 |
| 2978 | Intergy Production LLC | Edmond, OK 73083 | Oil & Gas Operator | Feb 2025 |
| 2979 | International Energy Company LLC | Tulsa, OK 74136-3922 | Oil & Gas Operator | Jan 2025 |
| 2980 | International Energy Corporation | Tulsa, OK 74136-3922 | Oil & Gas Operator | Dec 2018 |
| 2981 | International Ventures, Inc. | Pogasa Springs, CO 81147 | Oil Operator | Jul 1996 |
| 2982 | Internorth Inc | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2014 |
| 2983 | Interstate Explorations LLC | Houston, TX 77010 | Oil & Gas Operator | Apr 2025 |
| 2984 | Interstate Operating LLC | Tulsa, OK 74101-0535 | Oil & Gas Operator | Aug 2013 |
| 2985 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Feb 2025 |
| 2986 | Investment Operating Co | Stillwater, OK 74075-8572 | Oil Operator | Sep 2024 |
| 2987 | Investors Resources Corp | Edmond, OK 73034 | Oil & Gas Operator | Feb 2025 |
| 2988 | Invoil, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Apr 2025 |
| 2989 | Iochem Corporation | Oklahoma City, OK 73118-7483 | Oil & Gas Operator | Jan 2025 |
| 2990 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 2991 | Irex Corporation | Englewood, CO 80111 | Oil & Gas Operator | May 2000 |
| 2992 | Iron Hawk Energy Group Joint Venture | Tulsa, OK 74103-3305 | Oil & Gas Operator | Jan 2025 |
| 2993 | Iron Post Oil & Gas Co Inc | Bristow, OK 74010-4120 | Oil & Gas Operator | Jan 2025 |
| 2994 | Iron Sights Operating Inc | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2022 |
| 2995 | Iron Star Energy LLC | Houston, TX 77037-1142 | Oil & Gas Operator | Jan 2025 |
| 2996 | Isaacs Fairy J | Konawa, OK 74849-0134 | Oil Operator | Sep 2020 |
| 2997 | Isaacs-Chupco LLC | Konawa, OK 74849-4903 | Oil Operator | Mar 2023 |
| 2998 | Itero Energy LLC | Verden, OK 73092 | Oil Operator | Dec 2011 |
| 2999 | Itr Petroleum Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 3000 | J & E Energy Company | Oklahoma City, OK 73120-1108 | Oil & Gas Operator | Mar 2015 |