| 13901 | Intercontinental Petroleum | | Oil Operator | Oct 2012 |
| 13902 | Intercontinental Tech Group Inc. | | Oil & Gas Operator | Dec 2004 |
| 13903 | Intergrated Drill & Expl Inc | Tulsa, OK 74136-1071 | Oil & Gas Operator | Sep 1994 |
| 13904 | Intergrated Petroleum Corp. | Abilene, TX 79602 | Oil & Gas Operator | Nov 2024 |
| 13905 | Intergy Production LLC | Edmond, OK 73083 | Oil & Gas Operator | Sep 2024 |
| 13906 | Intergy, Inc. | Lomita, CA 90717 | Oil Operator | Jun 1997 |
| 13907 | Interior Oil Cor | | Gas Operator | Jun 1990 |
| 13908 | Interior Oil Corporation | Derby, KS 67037 | Oil & Gas Operator | Jan 2023 |
| 13909 | Interline Resources Corp | Casper, WY 82601 | Oil & Gas Operator | Oct 2009 |
| 13910 | Intermountain Oil Co | | Oil & Gas Operator | Nov 2003 |
| 13911 | Intermountain Operating, Inc. | Billings, MT 59103 | Oil & Gas Operator | Jul 2001 |
| 13912 | Intermountain Petroleum Co | | Oil Operator | Dec 2011 |
| 13913 | Intermountain Refining Co, Inc | Farmington, NM 87499 | Gas Operator | Aug 2006 |
| 13914 | International Basic Res., Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 1996 |
| 13915 | International Energy Company LLC | Tulsa, OK 74136-3922 | Oil & Gas Operator | Aug 2024 |
| 13916 | International Energy Corporation | Tulsa, OK 74136-3922 | Oil & Gas Operator | Dec 2018 |
| 13917 | International Oil & Gas Corp. | | Oil & Gas Operator | Dec 1986 |
| 13918 | International Oil&Gas Consultant | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 13919 | International Petroleum Service, LLC | | Oil Operator | Dec 2017 |
| 13920 | International Ventures, Inc. | Pogasa Springs, CO 81147 | Oil Operator | Jul 1996 |
| 13921 | International Western Oil Corp | Weatherford, TX 76086 | Oil & Gas Operator | Nov 2024 |
| 13922 | Internorth Inc | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2014 |
| 13923 | Interstate Energy Inc | | Oil & Gas Operator | Dec 2002 |
| 13924 | Interstate Explorations LLC | Houston, TX 77010 | Oil & Gas Operator | Nov 2024 |
| 13925 | Interstate Gas Co. | | Gas Operator | Dec 1941 |
| 13926 | Interstate Gas MKT Inc | Indiana, PA 15701 | Oil & Gas Operator | Dec 2018 |
| 13927 | Interstate Natural Gas Company, LLC | Pikeville, KY 41502 | Oil & Gas Operator | Dec 2021 |
| 13928 | Interstate Operating LLC | Tulsa, OK 74101-0535 | Oil & Gas Operator | Aug 2013 |
| 13929 | Interstate Producing Ser Inc | | Oil & Gas Operator | May 1986 |
| 13930 | Interstate Producing Servs,Inc | | Oil & Gas Operator | May 1987 |
| 13931 | Interstate Production Company, Inc. | Buckhannon, WV 26201-0000 | Oil & Gas Operator | Dec 2021 |
| 13932 | Intoil, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Dec 2002 |
| 13933 | Intrepid Drilling, LLC | | Oil & Gas Operator | May 2024 |
| 13934 | Intrepid Energy Corporation | Independence, KS 67301 | Oil Operator | Mar 2016 |
| 13935 | Intrepid Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2021 |
| 13936 | Intrepid Operating LTD., Co | Hobbs, NM 88241 | Oil & Gas Operator | Nov 2009 |
| 13937 | Intrepid Production Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 13938 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Sep 2024 |
| 13939 | Investment Land Services Inc | | Oil Operator | Oct 2001 |
| 13940 | Investment Operating Co | Stillwater, OK 74075-8572 | Oil Operator | Sep 2024 |
| 13941 | Investment Trends Corp. | | Gas Operator | Mar 1988 |
| 13942 | Investors Drilli | | Gas Operator | Jan 1993 |
| 13943 | Investors Oil, Inc. | | Oil Operator | Mar 1985 |
| 13944 | Investors Resources Corp | Edmond, OK 73034 | Oil & Gas Operator | Sep 2024 |
| 13945 | Invitation Energy, Incorporated | | Oil & Gas Operator | Dec 2021 |
| 13946 | Invito Operating, LLC | McKinney, TX 75070 | Oil & Gas Operator | Aug 2024 |
| 13947 | Invoil, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2024 |
| 13948 | Iochem Corporation | Oklahoma City, OK 73118-7483 | Oil & Gas Operator | Aug 2024 |
| 13949 | Ioe Acres V LLC | Perry, NY 14530 | Gas Operator | Dec 2023 |
| 13950 | Iola Wildcat LLC | Kansas City, MO 64190 | Oil Operator | Jul 2024 |
| 13951 | Iowa Production Company, Inc. | | Oil & Gas Operator | Jan 1992 |
| 13952 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 13953 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Nov 2024 |
| 13954 | Ipas Oil Company LLC | Pratt, KS 67124 | Oil Operator | Dec 2019 |
| 13955 | Ipr Energy Partners, L.P. | Bowie, TX 76230 | Oil & Gas Operator | Aug 2014 |
| 13956 | Ipr Energy Partners, LLC | Bowie, TX 76230 | Oil & Gas Operator | Nov 2024 |
| 13957 | Ipr USA Corp. | Irving, TX 75039 | Oil & Gas Operator | Jun 2009 |
| 13958 | Ipt Oil Company | Evansville, IN 47706 | Oil & Gas Operator | Nov 2024 |
| 13959 | Ira Oil & Gas LLC | Addison, TX 75001 | Oil & Gas Operator | Jul 2008 |
| 13960 | Ira Testers | Ira, TX 79527 | Oil & Gas Operator | Mar 2024 |
| 13961 | Ira Testers, LLC | Ira, TX 79527 | Oil Operator | Nov 2024 |
| 13962 | Irani Engineering | | Gas Operator | Dec 1995 |
| 13963 | Irene L. Heary Irrevocable Trust | Springville, NY 14141 | Gas Operator | Dec 2023 |
| 13964 | Irex Corporation | Englewood, CO 80111 | Oil & Gas Operator | May 2000 |
| 13965 | Irion Corporation, The | San Angelo, TX 76906 | Oil & Gas Operator | Jun 2021 |
| 13966 | Irish City Oil & Gas, Inc. | Wimberley, TX 78676 | Oil & Gas Operator | Nov 2024 |
| 13967 | Irish Oil & Gas Co. | Houston, TX 77242 | Oil & Gas Operator | Aug 2003 |
| 13968 | Iron Bell Operating, LLC | Lubbock, TX 79423 | Oil Operator | Nov 2024 |
| 13969 | Iron Creek Properties Inc | Casper, WY 82604 | Oil & Gas Operator | Sep 2024 |
| 13970 | Iron Hawk Energy Group Joint Venture | Tulsa, OK 74103-3305 | Oil & Gas Operator | Sep 2024 |
| 13971 | Iron Horse Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Nov 2024 |
| 13972 | Iron Oil Operating, LLC | | Oil & Gas Operator | Sep 2024 |
| 13973 | Iron Orchard Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Nov 2024 |
| 13974 | Iron Pennsylvania Land LLC | Waynesburg, PA 15370 | Gas Operator | Dec 2023 |
| 13975 | Iron Post Oil & Gas Co Inc | Bristow, OK 74010-4120 | Oil & Gas Operator | Jul 2024 |
| 13976 | Iron Sights Operating Inc | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2022 |
| 13977 | Iron Springs Operating Co. Inc | | Oil & Gas Operator | Jul 2024 |
| 13978 | Iron Star Energy LLC | Houston, TX 77037-1142 | Oil & Gas Operator | Sep 2024 |
| 13979 | Ironhorse Operations, LLC | Kilgore, TX 75663 | Oil Operator | Nov 2024 |
| 13980 | Ironroc Energy | The Woodlands, TX 77381 | Oil & Gas Operator | Nov 2024 |
| 13981 | Ironwood Exploration Inc | | Oil & Gas Operator | Mar 1995 |
| 13982 | Ironwood Oil & Gas LLC | Houston, TX 77067 | Oil & Gas Operator | Jun 2014 |
| 13983 | Iroquois Central School District | Elma, NY 14059 | Gas Operator | Dec 2023 |
| 13984 | Irvin Drilling Corp | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1990 |
| 13985 | Irvin Operations, Inc. | | Oil Operator | Aug 1996 |
| 13986 | Irvin Petroleum | Stinnett, TX 79083 | Oil & Gas Operator | Sep 1996 |
| 13987 | Irvin Petroleum Inc. | Stinnett, TX 79083 | Oil & Gas Operator | Apr 2016 |
| 13988 | Irwin H. Parnes | | Oil Operator | Jun 1982 |
| 13989 | Irwin-Crum | Nocona, TX 76255 | Oil Operator | Nov 2024 |
| 13990 | Isaacs Fairy J | Konawa, OK 74849-0134 | Oil Operator | Sep 2020 |
| 13991 | Isaacs Scott J Jr | Butler, PA 16002-0059 | Gas Operator | Sep 2024 |
| 13992 | Isaacs-Chupco LLC | Konawa, OK 74849-4903 | Oil Operator | Mar 2023 |
| 13993 | Isaacson Energy Resources, LLC | Austin, TX 78741 | Oil & Gas Operator | Nov 2024 |
| 13994 | Isaia, Deborah | East Aurora, NY 14052 | Gas Operator | Dec 2023 |
| 13995 | Isbell, Bob G. Operating | Cisco, TX 76437 | Oil & Gas Operator | Mar 2015 |
| 13996 | Isbrandtsen Oil And Gas Co | | Oil Operator | Mar 2002 |
| 13997 | Isern, James R. | Wichita, KS 67277 | Oil Operator | Apr 1996 |
| 13998 | Isis Operating Inc | Russell, KS 67665 | Oil Operator | Jun 2024 |
| 13999 | Iskandia Energy Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 14000 | Island Energy Partners LLC | | Gas Operator | Jan 2018 |