| 13901 | Illini Development Company | | Oil & Gas Operator | Dec 2002 |
| 13902 | Illoma Oil Company Inc | Algonquin, IL 60102-1825 | Oil & Gas Operator | Mar 2015 |
| 13903 | Imagery Exploration, Inc. | Dallas, TX 75380 | Oil & Gas Operator | Jul 2025 |
| 13904 | Imc Exploration Co. | | Oil & Gas Operator | Oct 1986 |
| 13905 | Immink Merle | | Oil & Gas Operator | May 2025 |
| 13906 | Imod Oil Prod LLC | Pleasantville, PA 16341-0149 | Oil & Gas Operator | Dec 2009 |
| 13907 | Impact Energy Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | May 2025 |
| 13908 | Impact Exploration & Production LLC | Greenwood VIllage, CO 80111 | Oil & Gas Operator | May 2025 |
| 13909 | Impact Exploration Company | Oklahoma City, OK 73118 | Oil & Gas Operator | May 1998 |
| 13910 | Imperator Investments LLC | Shawnee, KS 66217 | Oil Operator | Aug 2024 |
| 13911 | Imperial American Oil Corporation | Wichita, KS 67205 | Oil Operator | Dec 2009 |
| 13912 | Imperial Gas Resources LLC | Austin, TX 78701 | Oil & Gas Operator | Jul 2025 |
| 13913 | Imperial Occidental | | Oil & Gas Operator | Apr 2025 |
| 13914 | Imperial Oil & G | | Gas Operator | Jan 1990 |
| 13915 | Imperial Oil Com | | Oil & Gas Operator | Dec 1992 |
| 13916 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 13917 | Imperial Oil Of North Dakota, Inc. | | Oil & Gas Operator | Jul 2023 |
| 13918 | Imperial Oil Properties, Inc. | Wichita, KS 67201 | Oil & Gas Operator | Jun 2006 |
| 13919 | Imperial Operating Co., L.L.C. | Midland, TX 79701 | Oil Operator | Sep 2023 |
| 13920 | Imperial Petroleum Inc | Evansville, IN 47725 | Oil & Gas Operator | Jan 2005 |
| 13921 | Imperial-American Energy,Inc. | | Oil & Gas Operator | Jul 1978 |
| 13922 | Impetro Nonop LLC | | Oil Operator | Mar 2025 |
| 13923 | Impetro Oil & Gas, LLC | San Antonio, TX 78258 | Oil & Gas Operator | Jun 2018 |
| 13924 | Impetro Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2020 |
| 13925 | Impetro Resources LLC | | Oil & Gas Operator | May 2025 |
| 13926 | Ina Street Operations, Inc. | Skellytown, TX 79080 | Oil & Gas Operator | Nov 2012 |
| 13927 | Inabnet Est., H. Inabnet, Agt. | | Gas Operator | Jul 2005 |
| 13928 | Inactive Operator | | Oil Operator | Dec 1982 |
| 13929 | Inca Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2009 |
| 13930 | Incendium Resources LLC | Argyle, TX 76226 | Oil & Gas Operator | Jul 2025 |
| 13931 | Incline Energy | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 13932 | Incline Reserves | | Oil Operator | Apr 1988 |
| 13933 | Incline Reserves Inc | Topeka, KS BAD ADDR | Oil & Gas Operator | Mar 1994 |
| 13934 | Incremental Oil & Gas (Florence) LLC | | Oil & Gas Operator | Jun 2025 |
| 13935 | Incremental Oil & Gas USA Holdings Inc | Denver, CO 80202 | Oil & Gas Operator | Apr 2021 |
| 13936 | Inda Oil Unlimited | Dewey, OK 74029 | Oil Operator | Dec 2023 |
| 13937 | Independence Energy LLC | | Oil Operator | Mar 2025 |
| 13938 | Independence Resources MGMT, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Mar 2021 |
| 13939 | Independent Exploration Company | | Oil & Gas Operator | Dec 2000 |
| 13940 | Independent Oil Investors | Lakeside, MI 49116 | Oil & Gas Operator | Dec 1992 |
| 13941 | Independent Production Company | Greenwood VIllage, CO 80121 | Oil & Gas Operator | May 2003 |
| 13942 | Indexgeo & Associates, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2009 |
| 13943 | Indian Creek Oil, L.L.C. | Harrisville, WV 26362 | Gas Operator | Dec 2021 |
| 13944 | Indian Creek Resources Inc | Loveland, CO 80538 | Oil & Gas Operator | Dec 2024 |
| 13945 | Indian Exploration, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Jul 2025 |
| 13946 | Indian Hill Gas Co Inc | Fayette City, PA 15438-1203 | Oil & Gas Operator | Dec 2024 |
| 13947 | Indian Hills Resources LLC | Williamsburg, MI 49690 | Oil & Gas Operator | Dec 2024 |
| 13948 | Indian Nation Energy Company | Wewoka, OK 74884-3456 | Oil & Gas Operator | Apr 2020 |
| 13949 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Jul 2025 |
| 13950 | Indian Oil LTD. | Whitsett, TX 78075 | Oil & Gas Operator | Jul 2025 |
| 13951 | Indian Territory Operating LLC | Salado, TX 76571 | Oil & Gas Operator | Jan 2024 |
| 13952 | Indian Wells Oil | | Oil & Gas Operator | Jul 1995 |
| 13953 | Indian Wells Oil Co | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2000 |
| 13954 | Indiana Petroleum Cont | | Oil Operator | Dec 2023 |
| 13955 | Indianola Oil Inc | Bartlesville, OK 74005 | Oil & Gas Operator | Aug 2000 |
| 13956 | Indiek, John | Offerle, KS 67563 | Oil Operator | Nov 2005 |
| 13957 | Indigo Haynesville LLC | | Gas Operator | Feb 2018 |
| 13958 | Indigo II Louisiana Operating LLC | | Oil & Gas Operator | Feb 2015 |
| 13959 | Indigo Minerals LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 13960 | Indigo Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2019 |
| 13961 | Indrex Inc | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2000 |
| 13962 | Industrial Gas Services Inc | Wheat Ridge, CO 80033 | Oil & Gas Operator | Feb 2023 |
| 13963 | Industrial Pollution Control | | Oil & Gas Operator | Mar 1985 |
| 13964 | Industry Standard Supplies Inc | Dover, OH 44622 | Oil & Gas Operator | Dec 2024 |
| 13965 | Indy Oil, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2004 |
| 13966 | Ineos USA Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 13967 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 13968 | Inferno Energy | Yates Center, KS 66783 | Oil Operator | Mar 2025 |
| 13969 | Infield Discovery LLC | Madison, MS 39110 | Oil & Gas Operator | May 2025 |
| 13970 | Infinity Oil & Gas Inc | Nowata, OK 74048 | Oil Operator | Jun 1993 |
| 13971 | Infinity Oil & Gas Of TX, Inc. | Overland Park, KS 66210 | Oil & Gas Operator | Jul 2025 |
| 13972 | Infinity Oil & Gas Of Wyoming | Rock Springs, WY 82902 | Oil & Gas Operator | Feb 2009 |
| 13973 | Infinity Oil & Gas Of Wyoming Inc | | Oil Operator | Dec 2007 |
| 13974 | Infinity Oil And Gas, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 13975 | Infinity Oil, Inc. | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 13976 | Inflection Energy (Pa) LLC | Montoursville, PA 17754-9702 | Gas Operator | Mar 2025 |
| 13977 | Inflow Petroleum Resources LP | Dallas, TX 75240 | Oil & Gas Operator | Sep 2008 |
| 13978 | Ingersoll Oil Inc | Hominy, OK 74035 | Oil & Gas Operator | Jun 2000 |
| 13979 | Ingersoll Rosinbaum Oil Inc | | Oil & Gas Operator | Apr 2025 |
| 13980 | Ingo Energy, LLC | | Oil & Gas Operator | Dec 2016 |
| 13981 | Ingram Exploration Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2025 |
| 13982 | Ingram, J. Oil & Gas, Inc. | Plano, TX 75074 | Oil & Gas Operator | Jul 2025 |
| 13983 | Initial Energy Services, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2025 |
| 13984 | Inject Technologies Inc. | Andrews, TX 79714 | Oil Operator | Jul 2025 |
| 13985 | Injection Well Service | Lone Grove, OK 73443-0156 | Oil Operator | Apr 2005 |
| 13986 | Inlan Oceans, LLC | Coffeyville, KS 67337 | Oil Operator | Mar 2025 |
| 13987 | Inland Drilling Co Inc | Garretsville, OH 44231 | Oil & Gas Operator | Dec 1992 |
| 13988 | Inland Gas Corp. | Houston, TX 77036 | Oil Operator | Dec 2011 |
| 13989 | Inland Minerals Management, Inc. | Austin, TX 78701 | Oil & Gas Operator | Jul 2025 |
| 13990 | Inland Ocean, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Jul 2025 |
| 13991 | Inland Oil And Gas | Nacogdoches, TX 75961 | Oil & Gas Operator | Dec 1997 |
| 13992 | Inland Oil And Gas Corp. | | Gas Operator | Jun 2014 |
| 13993 | Inland Oil Corporation | Sapulpa, OK 74066 | Oil & Gas Operator | Jan 2025 |
| 13994 | Inland Operating Company | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2025 |
| 13995 | Inland Petroleum | Newark, OH 43055 | Oil Operator | Dec 2009 |
| 13996 | Inland Petroleum Company | | Oil & Gas Operator | Dec 1997 |
| 13997 | Inland Production Company | Vernal, UT 84079 | Oil & Gas Operator | Dec 2004 |
| 13998 | Inman Oil LLC | Ruidoso, NM 88355 | Oil Operator | May 2025 |
| 13999 | Innes Petroleum | | Oil Operator | Nov 1994 |
| 14000 | Innex California Inc. | | Oil & Gas Operator | May 2025 |