| 1 | I & L Development Co. | Dallas, TX 75219 | Oil & Gas Operator | Mar 1996 |
| 2 | I.T. Corporation | Arlington, TX 76016 | Oil & Gas Operator | Dec 2025 |
| 3 | I.T. Properties | Arlington, TX 76006 | Oil & Gas Operator | Dec 2025 |
| 4 | Ibc Petroleum, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Dec 2025 |
| 5 | Ibex Resources I, L.P. | Midland, TX 79701 | Oil & Gas Operator | Jul 1999 |
| 6 | Ibex Resources Operating LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2007 |
| 7 | Ibex Resources, LLC | Austin, TX 78751 | Oil & Gas Operator | Jul 1999 |
| 8 | Ica Energy Operating, L.L.C. | Odessa, TX 79760 | Oil & Gas Operator | Dec 2025 |
| 9 | Icarus Operating Corporation | Spring, TX 77393 | Oil & Gas Operator | Dec 2025 |
| 10 | Ice Brothers, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Jul 2024 |
| 11 | Ice Well Services, Inc. | Abilene, TX 79603 | Oil & Gas Operator | Dec 2025 |
| 12 | Ickert Enterprises | Olney, TX 76374 | Oil & Gas Operator | Dec 2025 |
| 13 | Ickert, A. F. Jr. | Olney, TX 76374 | Oil & Gas Operator | Apr 1998 |
| 14 | Ics Energy LLC | Stamford, TX 79553 | Oil & Gas Operator | Dec 2025 |
| 15 | Idaho Oil Co., Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Mar 2008 |
| 16 | Idgas, Inc. | Austin, TX 78746 | Oil & Gas Operator | Oct 1995 |
| 17 | Ijs Oil | Saint Jo, TX 76265 | Oil & Gas Operator | Dec 2025 |
| 18 | Ikard, Alan | Electra, TX 76360 | Oil & Gas Operator | Dec 2025 |
| 19 | Ike Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Dec 2025 |
| 20 | Imagery Exploration, Inc. | Dallas, TX 75380 | Oil & Gas Operator | Dec 2025 |
| 21 | Impact Exploration Company | Oklahoma City, OK 73118 | Oil & Gas Operator | May 1998 |
| 22 | Imperial Gas Resources LLC | Austin, TX 78701 | Oil & Gas Operator | Dec 2025 |
| 23 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 24 | Imperial Operating Co., L.L.C. | Midland, TX 79701 | Oil Operator | Sep 2023 |
| 25 | Impetro Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2020 |
| 26 | Ina Street Operations, Inc. | Skellytown, TX 79080 | Oil & Gas Operator | Nov 2012 |
| 27 | Inca Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2009 |
| 28 | Incendium Resources LLC | Argyle, TX 76226 | Oil & Gas Operator | Dec 2025 |
| 29 | Incline Energy | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 30 | Independence Resources MGMT, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Mar 2021 |
| 31 | Indexgeo & Associates, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2009 |
| 32 | Indian Exploration, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Dec 2025 |
| 33 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Dec 2025 |
| 34 | Indian Oil LTD. | Whitsett, TX 78075 | Oil & Gas Operator | Dec 2025 |
| 35 | Indigo Minerals LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 36 | Indigo Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2019 |
| 37 | Indy Oil, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2004 |
| 38 | Ineos USA Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 39 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 40 | Infinity Oil & Gas Inc | Nowata, OK 74048 | Oil Operator | Jun 1993 |
| 41 | Infinity Oil & Gas Of TX, Inc. | Overland Park, KS 66210 | Oil & Gas Operator | Dec 2025 |
| 42 | Ingram, J. Oil & Gas, Inc. | Plano, TX 75074 | Oil & Gas Operator | Dec 2025 |
| 43 | Initial Energy Services, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2025 |
| 44 | Inject Technologies Inc. | Andrews, TX 79714 | Oil Operator | Dec 2025 |
| 45 | Inland Gas Corp. | Houston, TX 77036 | Oil Operator | Dec 2011 |
| 46 | Inland Minerals Management, Inc. | Austin, TX 78701 | Oil & Gas Operator | Dec 2025 |
| 47 | Inland Ocean, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2025 |
| 48 | Inland Oil And Gas Company, Inc. | Chireno, TX 75937 | Oil & Gas Operator | Jun 2005 |
| 49 | Inland Production Company | Vernal, UT 84079 | Oil & Gas Operator | Dec 2004 |
| 50 | Innoverse Production, LLC | Gainesville, TX 76240 | Oil & Gas Operator | Dec 2025 |
| 51 | Inpex Eagle Ford, LLC | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2022 |
| 52 | Inspire Oil And Gas Inc. | Katy, TX 77449 | Oil Operator | Dec 2025 |
| 53 | Integras Operating, LLC | Irving, TX 75062 | Oil & Gas Operator | Dec 2025 |
| 54 | Integrated Operating Corporation | Dallas, TX 75243 | Oil & Gas Operator | Dec 2025 |
| 55 | Intercity Management Corp. | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Dec 2025 |
| 56 | Intercoast Oil And Gas | Tulsa, OK 74136 | Oil & Gas Operator | Mar 1997 |
| 57 | Intercoast Oil And Gas Company | Tulsa, OK 74136 | Oil & Gas Operator | Jun 1997 |
| 58 | Intercoastal Energy, Inc. | Houston, TX 77055 | Oil & Gas Operator | Aug 2003 |
| 59 | Intergrated Petroleum Corp. | Abilene, TX 79602 | Oil & Gas Operator | Dec 2025 |
| 60 | Interior Oil Corporation | Derby, KS 67037 | Oil & Gas Operator | Jan 2023 |
| 61 | International Basic Res., Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 1996 |
| 62 | International Oil&Gas Consultant | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 63 | International Ventures Inc | Pogasa Springs, CO 81147 | Oil Operator | Jul 1996 |
| 64 | International Western Oil Corp | Weatherford, TX 76086 | Oil & Gas Operator | Dec 2025 |
| 65 | Interstate Explorations LLC | Houston, TX 77010 | Oil & Gas Operator | Dec 2025 |
| 66 | Interstate Production Company, Inc. | Buckhannon, WV 26201-0000 | Oil & Gas Operator | Dec 2021 |
| 67 | Invoil, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2025 |
| 68 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 69 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Dec 2025 |
| 70 | Ipr Energy Partners, L.P. | Bowie, TX 76230 | Oil & Gas Operator | Aug 2014 |
| 71 | Ipr Energy Partners, LLC | Bowie, TX 76230 | Oil & Gas Operator | Dec 2025 |
| 72 | Ipr USA Corp. | Irving, TX 75039 | Oil & Gas Operator | Jun 2009 |
| 73 | Ipt Oil Company | Evansville, IN 47706 | Oil & Gas Operator | Dec 2025 |
| 74 | Ira Oil & Gas LLC | Addison, TX 75001 | Oil & Gas Operator | Jul 2008 |
| 75 | Ira Testers | Ira, TX 79527 | Oil & Gas Operator | Mar 2024 |
| 76 | Ira Testers, LLC | Ira, TX 79527 | Oil Operator | Dec 2025 |
| 77 | Irion Corporation, The | San Angelo, TX 76906 | Oil & Gas Operator | Jun 2021 |
| 78 | Irish City Oil & Gas, Inc. | Wimberley, TX 78676 | Oil & Gas Operator | Dec 2025 |
| 79 | Irish Oil & Gas Co. | Houston, TX 77242 | Oil & Gas Operator | Aug 2003 |
| 80 | Iron Bell Operating, LLC | Lubbock, TX 79423 | Oil & Gas Operator | Dec 2025 |
| 81 | Iron Horse Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 82 | Iron Orchard Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 83 | Iron Ridge Operating, LLC | Austin, TX 78738 | Oil & Gas Operator | Dec 2025 |
| 84 | Iron Sights Operating, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2022 |
| 85 | Ironhorse Operations, LLC | Kilgore, TX 75663 | Oil Operator | Dec 2025 |
| 86 | Ironroc Energy | The Woodlands, TX 77381 | Oil & Gas Operator | Dec 2025 |
| 87 | Ironwood Oil & Gas LLC | Houston, TX 77067 | Oil & Gas Operator | Jun 2014 |
| 88 | Irvin Petroleum | Stinnett, TX 79083 | Oil & Gas Operator | Sep 1996 |
| 89 | Irvin Petroleum Inc. | Stinnett, TX 79083 | Oil & Gas Operator | Apr 2016 |
| 90 | Irwin-Crum | Nocona, TX 76255 | Oil Operator | Dec 2025 |
| 91 | Is Energy, LLC | Seminole, TX 79360 | Oil Operator | Dec 2025 |
| 92 | Isaacson Energy Resources, LLC | Austin, TX 78741 | Oil & Gas Operator | Dec 2025 |
| 93 | Isbell, Bob G. Operating | Cisco, TX 76437 | Oil & Gas Operator | Mar 2015 |
| 94 | Iskandia Energy Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 95 | Island Exploration | Houston, TX 77058 | Oil & Gas Operator | Dec 2025 |
| 96 | Isom Energy, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | May 2018 |
| 97 | It'LL Do Oil Company | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 98 | Italian-American Oil Co., Inc. | Tomball, TX 77377 | Oil & Gas Operator | Dec 2025 |
| 99 | Itech Oil Company | Cypress, TX 77429 | Oil & Gas Operator | Aug 2007 |
| 100 | Itx Corporation | Dallas, TX 75225 | Oil & Gas Operator | Dec 2025 |