| 13901 | Inactive Operator | | Oil Operator | Dec 1982 |
| 13902 | Inca Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2009 |
| 13903 | Incendium Resources LLC | Argyle, TX 76226 | Oil & Gas Operator | Nov 2025 |
| 13904 | Incline Energy | Midland, TX 79710 | Oil & Gas Operator | Nov 2025 |
| 13905 | Incline Reserves | | Oil Operator | Apr 1988 |
| 13906 | Incline Reserves Inc | Topeka, KS BAD ADDR | Oil & Gas Operator | Mar 1994 |
| 13907 | Incremental Oil & Gas (Florence) LLC | | Oil & Gas Operator | Sep 2025 |
| 13908 | Incremental Oil & Gas USA Holdings Inc | Denver, CO 80202 | Oil & Gas Operator | Apr 2021 |
| 13909 | Inda Oil Unlimited | Dewey, OK 74029 | Oil Operator | Dec 2023 |
| 13910 | Independence Energy LLC | | Oil Operator | Jun 2025 |
| 13911 | Independence Resources MGMT, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Mar 2021 |
| 13912 | Independent Expl Company | | Oil & Gas Operator | Dec 2000 |
| 13913 | Independent Oil Investors | Lakeside, MI 49116 | Oil & Gas Operator | Dec 1992 |
| 13914 | Independent Production Company | Greenwood VIllage, CO 80121 | Oil & Gas Operator | May 2003 |
| 13915 | Indexgeo & Associates, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2009 |
| 13916 | Indian Creek Oil, L.L.C. | Harrisville, WV 26362 | Gas Operator | Dec 2021 |
| 13917 | Indian Creek Resources Inc | Loveland, CO 80538 | Oil & Gas Operator | Dec 2024 |
| 13918 | Indian Exploration, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Nov 2025 |
| 13919 | Indian Hill Gas Co Inc | Fayette City, PA 15438-1203 | Oil & Gas Operator | Dec 2024 |
| 13920 | Indian Hills Resources LLC | Williamsburg, MI 49690 | Oil & Gas Operator | Dec 2024 |
| 13921 | Indian Nation Energy Company | Wewoka, OK 74884-3456 | Oil & Gas Operator | Apr 2020 |
| 13922 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Nov 2025 |
| 13923 | Indian Oil LTD. | Whitsett, TX 78075 | Oil & Gas Operator | Nov 2025 |
| 13924 | Indian Territory Operating LLC | Salado, TX 76571 | Oil & Gas Operator | Jun 2025 |
| 13925 | Indian Wells Oil | | Oil & Gas Operator | Jul 1995 |
| 13926 | Indian Wells Oil Co | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2000 |
| 13927 | Indiana Petroleum Cont | | Oil Operator | Dec 2023 |
| 13928 | Indianola Oil Inc | Bartlesville, OK 74005 | Oil & Gas Operator | Aug 2000 |
| 13929 | Indiek, John | Offerle, KS 67563 | Oil Operator | Nov 2005 |
| 13930 | Indigo Haynesville LLC | | Gas Operator | Feb 2018 |
| 13931 | Indigo II Louisiana Operating LLC | | Oil & Gas Operator | Feb 2015 |
| 13932 | Indigo Minerals LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 13933 | Indigo Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2019 |
| 13934 | Indrex Inc | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2000 |
| 13935 | Industrial Gas Services Inc | Wheat Ridge, CO 80033 | Oil & Gas Operator | Feb 2023 |
| 13936 | Industrial Pollution Control | | Oil & Gas Operator | Mar 1985 |
| 13937 | Industry Standard Supplies Inc | Dover, OH 44622 | Oil & Gas Operator | Dec 2024 |
| 13938 | Indy Oil, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2004 |
| 13939 | Ineos USA Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2025 |
| 13940 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 13941 | Inferno Energy | Yates Center, KS 66783 | Oil Operator | May 2025 |
| 13942 | Infield Discovery LLC | Madison, MS 39110 | Oil & Gas Operator | Sep 2025 |
| 13943 | Infinity Oil & Gas Inc | Nowata, OK 74048 | Oil Operator | Jun 1993 |
| 13944 | Infinity Oil & Gas Of TX, Inc. | Overland Park, KS 66210 | Oil & Gas Operator | Nov 2025 |
| 13945 | Infinity Oil & Gas Of Wyoming | Rock Springs, WY 82902 | Oil & Gas Operator | Feb 2009 |
| 13946 | Infinity Oil And Gas, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 13947 | Infinity Oil, Inc. | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 13948 | Inflection Energy (Pa) LLC | Montoursville, PA 17754-9702 | Gas Operator | Mar 2025 |
| 13949 | Inflow Petroleum Resources LP | Dallas, TX 75240 | Oil & Gas Operator | Sep 2008 |
| 13950 | Ingersoll Oil Inc | Hominy, OK 74035 | Oil & Gas Operator | Jun 2000 |
| 13951 | Ingersoll Rosinbaum Oil Inc | | Oil & Gas Operator | Jun 2025 |
| 13952 | Ingo Energy, LLC | | Oil & Gas Operator | Dec 2016 |
| 13953 | Ingram Exploration Inc | Seminole, OK 74868 | Oil & Gas Operator | Jul 2025 |
| 13954 | Ingram, J. Oil & Gas, Inc. | Plano, TX 75074 | Oil & Gas Operator | Nov 2025 |
| 13955 | Initial Energy Services, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Nov 2025 |
| 13956 | Inject Technologies Inc. | Andrews, TX 79714 | Oil Operator | Nov 2025 |
| 13957 | Injection Well Service | Lone Grove, OK 73443-0156 | Oil Operator | Apr 2005 |
| 13958 | Inlan Oceans, LLC | Coffeyville, KS 67337 | Oil Operator | Jun 2025 |
| 13959 | Inland Drilling Co Inc | Garretsville, OH 44231 | Oil & Gas Operator | Dec 1992 |
| 13960 | Inland Gas Corp. | Houston, TX 77036 | Oil Operator | Dec 2011 |
| 13961 | Inland Minerals Management, Inc. | Austin, TX 78701 | Oil & Gas Operator | Nov 2025 |
| 13962 | Inland Ocean, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Nov 2025 |
| 13963 | Inland Oil And Gas Company, Inc. | Chireno, TX 75937 | Oil & Gas Operator | Jun 2005 |
| 13964 | Inland Oil And Gas Corp. | | Gas Operator | Jun 2014 |
| 13965 | Inland Oil Corporation | Sapulpa, OK 74067 | Oil & Gas Operator | Jul 2025 |
| 13966 | Inland Operating Company | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |
| 13967 | Inland Petroleum | Newark, OH 43055 | Oil Operator | Dec 2009 |
| 13968 | Inland Petroleum Company | | Oil & Gas Operator | Dec 1997 |
| 13969 | Inland Production Company | Vernal, UT 84079 | Oil & Gas Operator | Dec 2004 |
| 13970 | Inman Oil LLC | Ruidoso, NM 88355 | Oil Operator | Jul 2025 |
| 13971 | Innes Petroleum | | Oil Operator | Nov 1994 |
| 13972 | Innex California Inc. | | Oil & Gas Operator | Sep 2025 |
| 13973 | Innovative Exploration, LLC | Cincinnati, OH 45219 | Oil Operator | Dec 2023 |
| 13974 | Innovative Resources, Inc. | | Oil Operator | Feb 2022 |
| 13975 | Innoverse Production, LLC | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2025 |
| 13976 | Inpetco, Inc. | | Oil & Gas Operator | Aug 1991 |
| 13977 | Inpex Eagle Ford, LLC | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2022 |
| 13978 | Inr Ohio LLC | Morgantown, WV 26508-9209 | Oil & Gas Operator | Jun 2025 |
| 13979 | Inr Opr LLC | Morgantown, WV 26508-9201 | Gas Operator | Aug 2025 |
| 13980 | Inspire Oil And Gas Inc. | Katy, TX 77449 | Oil Operator | Nov 2025 |
| 13981 | Instrat Inc. | | Oil & Gas Operator | Dec 1992 |
| 13982 | Int'L Petr & Expl Opr Corp | | Oil & Gas Operator | Jan 2012 |
| 13983 | Integras Operating, LLC | Irving, TX 75062 | Oil & Gas Operator | Nov 2025 |
| 13984 | Integrated Energy Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 13985 | Integrated Energy Service Corp | Cleveland, OK 74020 | Oil & Gas Operator | Nov 1998 |
| 13986 | Integrated Exploration & Production LLC | | Oil & Gas Operator | Aug 2024 |
| 13987 | Integrated Operating Corporation | Dallas, TX 75243 | Oil & Gas Operator | Nov 2025 |
| 13988 | Integrated Petroleum Corporation | Denver, CO 80202 | Oil Operator | Jan 2010 |
| 13989 | Integrity Funding Sys Inc | Lancaster, PA 17602-1933 | Gas Operator | Dec 2007 |
| 13990 | Integrity Oil & Gas | Golden, CO 80401 | Oil & Gas Operator | May 2011 |
| 13991 | Inter-American Energy Corp. | Toronto, On Canada M5a1n1, 33139 | Gas Operator | Dec 2019 |
| 13992 | Inter-American Petroleum | | Oil & Gas Operator | Dec 2006 |
| 13993 | Inter-State Ener | | Oil Operator | Oct 1987 |
| 13994 | Inter-States Oil & Gas Inc | Edmond, OK 73003-0023 | Oil & Gas Operator | Apr 2020 |
| 13995 | Intercity Management Corp. | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Nov 2025 |
| 13996 | Intercoast Oil And Gas | Tulsa, OK 74136 | Oil & Gas Operator | Mar 1997 |
| 13997 | Intercoast Oil And Gas Company | Tulsa, OK 74136 | Oil & Gas Operator | Jun 1997 |
| 13998 | Intercoastal Energy, Inc. | Houston, TX 77055 | Oil & Gas Operator | Aug 2003 |
| 13999 | Intercoastal Operating Co. | | Oil Operator | Dec 1980 |
| 14000 | Intercontinental Petroleum | | Oil Operator | Oct 2012 |