| 14101 | Int'L Petr & Expl Opr Corp | | Oil & Gas Operator | Jan 2012 |
| 14102 | Integras Operating, LLC | Irving, TX 75062 | Oil & Gas Operator | May 2025 |
| 14103 | Integrated Energy Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 14104 | Integrated Energy Service Corp | Cleveland, OK 74020 | Oil & Gas Operator | Nov 1998 |
| 14105 | Integrated Exploration & Production LLC | | Oil & Gas Operator | Aug 2024 |
| 14106 | Integrated Operating Corporation | Dallas, TX 75243 | Oil & Gas Operator | May 2025 |
| 14107 | Integrated Petroleum Corporation | Denver, CO 80202 | Oil Operator | Jan 2010 |
| 14108 | Integrity Funding Sys Inc | Lancaster, PA 17602-1933 | Gas Operator | Dec 2007 |
| 14109 | Integrity Oil & Gas | Golden, CO 80401 | Oil & Gas Operator | May 2011 |
| 14110 | Inter-American Energy Corp. | Toronto, On Canada M5a1n1, 33139 | Gas Operator | Dec 2019 |
| 14111 | Inter-American Petroleum | | Oil & Gas Operator | Dec 2006 |
| 14112 | Inter-State Ener | | Oil Operator | Oct 1987 |
| 14113 | Inter-States Oil & Gas Inc | Edmond, OK 73003-0023 | Oil & Gas Operator | Apr 2020 |
| 14114 | Intercity Management Corp. | Corpus Chrsti, TX 78412 | Oil & Gas Operator | May 2025 |
| 14115 | Intercoast Oil And Gas | Tulsa, OK 74136 | Oil & Gas Operator | Mar 1997 |
| 14116 | Intercoast Oil And Gas Company | Tulsa, OK 74136 | Oil & Gas Operator | Jun 1997 |
| 14117 | Intercoastal Energy, Inc. | Houston, TX 77055 | Oil & Gas Operator | Aug 2003 |
| 14118 | Intercoastal Operating Co. | | Oil Operator | Dec 1980 |
| 14119 | Intercontinental Petroleum | | Oil Operator | Oct 2012 |
| 14120 | Intercontinental Tech Group Inc. | | Oil & Gas Operator | Dec 2004 |
| 14121 | Intergrated Drill & Expl Inc | Tulsa, OK 74136-1071 | Oil & Gas Operator | Sep 1994 |
| 14122 | Intergrated Petroleum Corp. | Abilene, TX 79602 | Oil & Gas Operator | May 2025 |
| 14123 | Intergy Production LLC | Edmond, OK 73083 | Oil & Gas Operator | Mar 2025 |
| 14124 | Intergy, Inc. | Lomita, CA 90717 | Oil Operator | Jun 1997 |
| 14125 | Interior Oil Cor | | Gas Operator | Jun 1990 |
| 14126 | Interior Oil Corporation | Derby, KS 67037 | Oil & Gas Operator | Jan 2023 |
| 14127 | Interline Resources Corp | Casper, WY 82601 | Oil & Gas Operator | Oct 2009 |
| 14128 | Intermountain Leasing, Inc. | Billings, MT 59103 | Gas Operator | Mar 2020 |
| 14129 | Intermountain Oil Co | | Oil & Gas Operator | Nov 2003 |
| 14130 | Intermountain Operating, Inc. | Billings, MT 59103 | Oil & Gas Operator | Jul 2001 |
| 14131 | Intermountain Petroleum Co | | Oil Operator | Dec 2011 |
| 14132 | Intermountain Refining Co, Inc | Farmington, NM 87499 | Gas Operator | Aug 2006 |
| 14133 | International Basic Res., Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 1996 |
| 14134 | International Energy Company LLC | Tulsa, OK 74136-3922 | Oil & Gas Operator | Jan 2025 |
| 14135 | International Energy Corporation | Tulsa, OK 74136-3922 | Oil & Gas Operator | Dec 2018 |
| 14136 | International Oil & Gas Corp. | | Oil & Gas Operator | Dec 1986 |
| 14137 | International Oil&Gas Consultant | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 14138 | International Petroleum Service, LLC | | Oil Operator | Dec 2017 |
| 14139 | International Ventures, Inc. | Pogasa Springs, CO 81147 | Oil Operator | Jul 1996 |
| 14140 | International Western Oil Corp | Weatherford, TX 76086 | Oil & Gas Operator | May 2025 |
| 14141 | Internorth Inc | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2014 |
| 14142 | Interstate Energy Inc | | Oil & Gas Operator | Dec 2002 |
| 14143 | Interstate Explorations LLC | Houston, TX 77010 | Oil & Gas Operator | May 2025 |
| 14144 | Interstate Gas Co. | | Gas Operator | Dec 1941 |
| 14145 | Interstate Gas MKT Inc | Indiana, PA 15701 | Oil & Gas Operator | Dec 2018 |
| 14146 | Interstate Natural Gas Company, LLC | Pikeville, KY 41502 | Oil & Gas Operator | Dec 2023 |
| 14147 | Interstate Operating LLC | Tulsa, OK 74101-0535 | Oil & Gas Operator | Aug 2013 |
| 14148 | Interstate Producing Ser Inc | | Oil & Gas Operator | May 1986 |
| 14149 | Interstate Producing Servs,Inc | | Oil & Gas Operator | May 1987 |
| 14150 | Interstate Production Company, Inc. | Buckhannon, WV 26201-0000 | Oil & Gas Operator | Dec 2021 |
| 14151 | Intoil, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Dec 2002 |
| 14152 | Intrepid Drilling, LLC | | Oil & Gas Operator | Jan 2025 |
| 14153 | Intrepid Energy Corporation | Independence, KS 67301 | Oil Operator | Mar 2016 |
| 14154 | Intrepid Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2021 |
| 14155 | Intrepid Operating LTD., Co | Hobbs, NM 88241 | Oil & Gas Operator | Nov 2009 |
| 14156 | Intrepid Production Corporation | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 14157 | Investco Oil And Gas Inc | | Oil & Gas Operator | Jan 2025 |
| 14158 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Mar 2025 |
| 14159 | Investment Land Services Inc | | Oil Operator | Oct 2001 |
| 14160 | Investment Operating Co | Stillwater, OK 74075-8572 | Oil Operator | Sep 2024 |
| 14161 | Investment Trends Corp. | | Gas Operator | Mar 1988 |
| 14162 | Investors Drilli | | Gas Operator | Jan 1993 |
| 14163 | Investors Oil, Inc. | | Oil Operator | Mar 1985 |
| 14164 | Investors Resources Corp | Edmond, OK 73034 | Oil & Gas Operator | Mar 2025 |
| 14165 | Invitation Energy, Incorporated | | Oil & Gas Operator | Dec 2021 |
| 14166 | Invito Operating, LLC | McKinney, TX 75070 | Oil & Gas Operator | Mar 2025 |
| 14167 | Invoil, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2025 |
| 14168 | Iochem Corporation | Oklahoma City, OK 73118-7483 | Oil & Gas Operator | Mar 2025 |
| 14169 | Ioe Acres V LLC | Perry, NY 14530 | Gas Operator | Dec 2023 |
| 14170 | Iola Wildcat LLC | Kansas City, MO 64190 | Oil Operator | Jan 2025 |
| 14171 | Iowa Production Company, Inc. | | Oil & Gas Operator | Jan 1992 |
| 14172 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 14173 | Ipact | Austin, TX 78734 | Oil & Gas Operator | May 2025 |
| 14174 | Ipas Oil Company LLC | Pratt, KS 67124 | Oil Operator | Dec 2019 |
| 14175 | Ipr Energy Partners, L.P. | Bowie, TX 76230 | Oil & Gas Operator | Aug 2014 |
| 14176 | Ipr Energy Partners, LLC | Bowie, TX 76230 | Oil & Gas Operator | May 2025 |
| 14177 | Ipr USA Corp. | Irving, TX 75039 | Oil & Gas Operator | Jun 2009 |
| 14178 | Ipt Oil Company | Evansville, IN 47706 | Oil & Gas Operator | May 2025 |
| 14179 | Ira Oil & Gas LLC | Addison, TX 75001 | Oil & Gas Operator | Jul 2008 |
| 14180 | Ira Testers | Ira, TX 79527 | Oil & Gas Operator | Mar 2024 |
| 14181 | Ira Testers, LLC | Ira, TX 79527 | Oil Operator | May 2025 |
| 14182 | Irani Engineering | | Gas Operator | Dec 1995 |
| 14183 | Irene L. Heary Irrevocable Trust | Springville, NY 14141 | Gas Operator | Dec 2023 |
| 14184 | Irex Corporation | Englewood, CO 80111 | Oil & Gas Operator | May 2000 |
| 14185 | Irion Corporation, The | San Angelo, TX 76906 | Oil & Gas Operator | Jun 2021 |
| 14186 | Irish City Oil & Gas, Inc. | Wimberley, TX 78676 | Oil & Gas Operator | May 2025 |
| 14187 | Irish Oil & Gas Co. | Houston, TX 77242 | Oil & Gas Operator | Aug 2003 |
| 14188 | Iron Bell Operating, LLC | Lubbock, TX 79423 | Oil & Gas Operator | May 2025 |
| 14189 | Iron Creek Properties Inc | Casper, WY 82604 | Oil & Gas Operator | Mar 2025 |
| 14190 | Iron Hawk Energy Group Joint Venture | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 14191 | Iron Horse Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | May 2025 |
| 14192 | Iron Oil Operating, LLC | | Oil & Gas Operator | Mar 2025 |
| 14193 | Iron Orchard Operating LLC | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 14194 | Iron Pennsylvania Land LLC | Waynesburg, PA 15370 | Gas Operator | Dec 2024 |
| 14195 | Iron Post Oil & Gas Co Inc | Bristow, OK 74010-4120 | Oil & Gas Operator | Jan 2025 |
| 14196 | Iron Ridge Operating, LLC | Austin, TX 78738 | Oil & Gas Operator | May 2025 |
| 14197 | Iron Sights Operating, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2022 |
| 14198 | Iron Springs Operating Co. Inc | | Oil & Gas Operator | Jan 2025 |
| 14199 | Iron Star Energy LLC | Houston, TX 77037-1142 | Oil & Gas Operator | Mar 2025 |
| 14200 | Ironhorse Operations, LLC | Kilgore, TX 75663 | Oil Operator | May 2025 |