| 14001 | Intercontinental Tech Group Inc. | | Oil & Gas Operator | Dec 2004 |
| 14002 | Intergrated Drill & Expl Inc | Tulsa, OK 74136-1071 | Oil & Gas Operator | Sep 1994 |
| 14003 | Intergrated Petroleum Corp. | Abilene, TX 79602 | Oil & Gas Operator | Nov 2025 |
| 14004 | Intergy Production LLC | Edmond, OK 73083 | Oil & Gas Operator | Jul 2025 |
| 14005 | Intergy, Inc. | Lomita, CA 90717 | Oil Operator | Jun 1997 |
| 14006 | Interior Oil Cor | | Gas Operator | Jun 1990 |
| 14007 | Interior Oil Corporation | Derby, KS 67037 | Oil & Gas Operator | Jan 2023 |
| 14008 | Interline Resources Corp | Casper, WY 82601 | Oil & Gas Operator | Oct 2009 |
| 14009 | Intermountain Leasing, Inc. | Billings, MT 59103 | Gas Operator | Mar 2020 |
| 14010 | Intermountain Operating, Inc. | Billings, MT 59103 | Oil & Gas Operator | Jul 2001 |
| 14011 | Intermountain Petroleum Co | | Oil Operator | Dec 2011 |
| 14012 | Intermountain Refining Co, Inc | Farmington, NM 87499 | Gas Operator | Aug 2006 |
| 14013 | International Basic Res., Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 1996 |
| 14014 | International Energy Company LLC | Tulsa, OK 74136-3922 | Oil & Gas Operator | Aug 2025 |
| 14015 | International Energy Corporation | Tulsa, OK 74136-3922 | Oil & Gas Operator | Dec 2018 |
| 14016 | International Oil & Gas Corp. | | Oil & Gas Operator | Dec 1986 |
| 14017 | International Oil&Gas Consultant | Graham, TX 76450 | Oil & Gas Operator | Nov 2025 |
| 14018 | International Petroleum Service, LLC | | Oil Operator | Dec 2017 |
| 14019 | International Ventures Inc | Pogasa Springs, CO 81147 | Oil Operator | Jul 1996 |
| 14020 | International Western Oil Corp | Weatherford, TX 76086 | Oil & Gas Operator | Nov 2025 |
| 14021 | Internorth Inc | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2014 |
| 14022 | Interstate Energy Inc | | Oil & Gas Operator | Dec 2002 |
| 14023 | Interstate Explorations LLC | Houston, TX 77010 | Oil & Gas Operator | Nov 2025 |
| 14024 | Interstate Gas Co. | | Gas Operator | Dec 1941 |
| 14025 | Interstate Gas MKT Inc | Indiana, PA 15701 | Oil & Gas Operator | Dec 2018 |
| 14026 | Interstate Natural Gas Company, LLC | Pikeville, KY 41502 | Oil & Gas Operator | Dec 2023 |
| 14027 | Interstate Operating LLC | Tulsa, OK 74101-0535 | Oil & Gas Operator | Aug 2013 |
| 14028 | Interstate Producing Ser Inc | | Oil & Gas Operator | May 1986 |
| 14029 | Interstate Producing Servs,Inc | | Oil & Gas Operator | May 1987 |
| 14030 | Interstate Production Company, Inc. | Buckhannon, WV 26201-0000 | Oil & Gas Operator | Dec 2021 |
| 14031 | Intoil, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Dec 2002 |
| 14032 | Intrepid Drilling, LLC | | Oil & Gas Operator | Jan 2025 |
| 14033 | Intrepid Energy Corporation | Independence, KS 67301 | Oil Operator | Mar 2016 |
| 14034 | Intrepid Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2021 |
| 14035 | Intrepid Operating LTD., Co | Hobbs, NM 88241 | Oil & Gas Operator | Nov 2009 |
| 14036 | Intrepid Production Corporation | Denver, CO 80202 | Oil & Gas Operator | Aug 2025 |
| 14037 | Investco Oil And Gas Inc | | Oil & Gas Operator | Jan 2025 |
| 14038 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Aug 2025 |
| 14039 | Investment Land Services Inc | | Oil Operator | Oct 2001 |
| 14040 | Investment Operating Co | Stillwater, OK 74075-8572 | Oil Operator | Aug 2025 |
| 14041 | Investment Trends Corp. | | Gas Operator | Mar 1988 |
| 14042 | Investors Drilli | | Gas Operator | Jan 1993 |
| 14043 | Investors Oil, Inc. | | Oil Operator | Mar 1985 |
| 14044 | Investors Resources Corp | Edmond, OK 73034 | Oil & Gas Operator | Aug 2025 |
| 14045 | Invitation Energy, Incorporated | | Oil & Gas Operator | Dec 2021 |
| 14046 | Invito Operating, LLC | McKinney, TX 75070 | Oil & Gas Operator | Aug 2025 |
| 14047 | Invoil, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2025 |
| 14048 | Iochem Corporation | Oklahoma City, OK 73118-7483 | Oil & Gas Operator | Aug 2025 |
| 14049 | Ioe Acres V LLC | Perry, NY 14530 | Gas Operator | Dec 2024 |
| 14050 | Iola Wildcat LLC | Kansas City, MO 64190 | Oil Operator | Oct 2019 |
| 14051 | Iowa Production Company, Inc. | | Oil & Gas Operator | Jan 1992 |
| 14052 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 14053 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Nov 2025 |
| 14054 | Ipas Oil Company LLC | Pratt, KS 67124 | Oil Operator | Dec 2019 |
| 14055 | Ipr Energy Partners, L.P. | Bowie, TX 76230 | Oil & Gas Operator | Aug 2014 |
| 14056 | Ipr Energy Partners, LLC | Bowie, TX 76230 | Oil & Gas Operator | Nov 2025 |
| 14057 | Ipr USA Corp. | Irving, TX 75039 | Oil & Gas Operator | Jun 2009 |
| 14058 | Ipt Oil Company | Evansville, IN 47706 | Oil & Gas Operator | Nov 2025 |
| 14059 | Ira Oil & Gas LLC | Addison, TX 75001 | Oil & Gas Operator | Jul 2008 |
| 14060 | Ira Testers | Ira, TX 79527 | Oil & Gas Operator | Mar 2024 |
| 14061 | Ira Testers, LLC | Ira, TX 79527 | Oil Operator | Nov 2025 |
| 14062 | Irani Engineering | | Gas Operator | Dec 1995 |
| 14063 | Irene L. Heary Irrevocable Trust | Springville, NY 14141 | Gas Operator | Dec 2024 |
| 14064 | Irex Corporation | Englewood, CO 80111 | Oil & Gas Operator | May 2000 |
| 14065 | Irion Corporation, The | San Angelo, TX 76906 | Oil & Gas Operator | Jun 2021 |
| 14066 | Irish City Oil & Gas, Inc. | Wimberley, TX 78676 | Oil & Gas Operator | Nov 2025 |
| 14067 | Irish Oil & Gas Co. | Houston, TX 77242 | Oil & Gas Operator | Aug 2003 |
| 14068 | Iron Bell Operating, LLC | Lubbock, TX 79423 | Oil & Gas Operator | Nov 2025 |
| 14069 | Iron Creek Properties Inc | Casper, WY 82604 | Oil & Gas Operator | Sep 2025 |
| 14070 | Iron Hawk Energy Group Joint Venture | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2025 |
| 14071 | Iron Horse Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Nov 2025 |
| 14072 | Iron Oil Operating, LLC | | Oil & Gas Operator | Mar 2025 |
| 14073 | Iron Orchard Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Nov 2025 |
| 14074 | Iron Pennsylvania Land LLC | Waynesburg, PA 15370 | Gas Operator | Dec 2024 |
| 14075 | Iron Post Oil & Gas Co Inc | Bristow, OK 74010-4120 | Oil & Gas Operator | Aug 2025 |
| 14076 | Iron Ridge Operating, LLC | Austin, TX 78738 | Oil & Gas Operator | Nov 2025 |
| 14077 | Iron Sights Operating, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2022 |
| 14078 | Iron Springs Operating Co. Inc | | Oil & Gas Operator | Jan 2025 |
| 14079 | Iron Star Energy LLC | Houston, TX 77037-1142 | Oil & Gas Operator | Jul 2025 |
| 14080 | Ironhorse Operations, LLC | Kilgore, TX 75663 | Oil Operator | Nov 2025 |
| 14081 | Ironroc Energy | The Woodlands, TX 77381 | Oil & Gas Operator | Nov 2025 |
| 14082 | Ironwood Exploration Inc | | Oil & Gas Operator | Mar 1995 |
| 14083 | Ironwood Oil & Gas LLC | Houston, TX 77067 | Oil & Gas Operator | Jun 2014 |
| 14084 | Iroquois Central School District | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 14085 | Irvin Drilling Corp | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1990 |
| 14086 | Irvin Operations, Inc. | | Oil Operator | Aug 1996 |
| 14087 | Irvin Petroleum | Stinnett, TX 79083 | Oil & Gas Operator | Sep 1996 |
| 14088 | Irvin Petroleum Inc. | Stinnett, TX 79083 | Oil & Gas Operator | Apr 2016 |
| 14089 | Irwin H. Parnes | | Oil Operator | Jun 1982 |
| 14090 | Irwin-Crum | Nocona, TX 76255 | Oil Operator | Nov 2025 |
| 14091 | Is Energy, LLC | Seminole, TX 79360 | Oil Operator | Nov 2025 |
| 14092 | Isaacs Billy J/Juanda R Living Trust | Konawa, OK 74849-6021 | Oil Operator | Jul 2025 |
| 14093 | Isaacs Fairy J | Konawa, OK 74849-0134 | Oil Operator | Sep 2020 |
| 14094 | Isaacs Scott J Jr | Butler, PA 16002-0059 | Gas Operator | Aug 2025 |
| 14095 | Isaacson Energy Resources, LLC | Austin, TX 78741 | Oil & Gas Operator | Nov 2025 |
| 14096 | Isaia, Deborah | East Aurora, NY 14052 | Gas Operator | Dec 2024 |
| 14097 | Isbell, Bob G. Operating | Cisco, TX 76437 | Oil & Gas Operator | Mar 2015 |
| 14098 | Isbrandtsen Oil And Gas Co | | Oil Operator | Mar 2002 |
| 14099 | Iseman William R | Ford City, PA 16226-1488 | Gas Operator | Dec 2024 |
| 14100 | Isern, James R. | Wichita, KS 67277 | Oil Operator | Apr 1996 |