| 5301 | Ice Well Services, Inc. | Abilene, TX 79603 | Oil & Gas Operator | Oct 2025 |
| 5302 | Ickert Enterprises | Olney, TX 76374 | Oil & Gas Operator | Oct 2025 |
| 5303 | Ickert, A. F. Jr. | Olney, TX 76374 | Oil & Gas Operator | Apr 1998 |
| 5304 | Ics Energy LLC | Stamford, TX 79553 | Oil & Gas Operator | Oct 2025 |
| 5305 | Idaho Oil Co., Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Mar 2008 |
| 5306 | Idgas, Inc. | Austin, TX 78746 | Oil & Gas Operator | Oct 1995 |
| 5307 | Ijs Oil | Saint Jo, TX 76265 | Oil & Gas Operator | Oct 2025 |
| 5308 | Ikard, Alan | Electra, TX 76360 | Oil & Gas Operator | Oct 2025 |
| 5309 | Ike Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Oct 2025 |
| 5310 | Imagery Exploration, Inc. | Dallas, TX 75380 | Oil & Gas Operator | Oct 2025 |
| 5311 | Impact Exploration Company | Oklahoma City, OK 73118 | Oil & Gas Operator | May 1998 |
| 5312 | Imperial Gas Resources LLC | Austin, TX 78701 | Oil & Gas Operator | Oct 2025 |
| 5313 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 5314 | Imperial Operating Co., L.L.C. | Midland, TX 79701 | Oil Operator | Sep 2023 |
| 5315 | Impetro Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2020 |
| 5316 | Ina Street Operations, Inc. | Skellytown, TX 79080 | Oil & Gas Operator | Nov 2012 |
| 5317 | Inca Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2009 |
| 5318 | Incendium Resources LLC | Argyle, TX 76226 | Oil & Gas Operator | Oct 2025 |
| 5319 | Incline Energy | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 5320 | Independence Resources MGMT, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Mar 2021 |
| 5321 | Indexgeo & Associates, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2009 |
| 5322 | Indian Exploration, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Oct 2025 |
| 5323 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Oct 2025 |
| 5324 | Indian Oil LTD. | Whitsett, TX 78075 | Oil & Gas Operator | Oct 2025 |
| 5325 | Indigo Minerals LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 5326 | Indigo Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2019 |
| 5327 | Indy Oil, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2004 |
| 5328 | Ineos USA Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 5329 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 5330 | Infinity Oil & Gas Inc | Nowata, OK 74048 | Oil Operator | Jun 1993 |
| 5331 | Infinity Oil & Gas Of TX, Inc. | Overland Park, KS 66210 | Oil & Gas Operator | Oct 2025 |
| 5332 | Ingram, J. Oil & Gas, Inc. | Plano, TX 75074 | Oil & Gas Operator | Oct 2025 |
| 5333 | Initial Energy Services, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2025 |
| 5334 | Inject Technologies Inc. | Andrews, TX 79714 | Oil Operator | Oct 2025 |
| 5335 | Inland Gas Corp. | Houston, TX 77036 | Oil Operator | Dec 2011 |
| 5336 | Inland Minerals Management, Inc. | Austin, TX 78701 | Oil & Gas Operator | Oct 2025 |
| 5337 | Inland Ocean, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Oct 2025 |
| 5338 | Inland Oil And Gas Company, Inc. | Chireno, TX 75937 | Oil & Gas Operator | Jun 2005 |
| 5339 | Inland Production Company | Vernal, UT 84079 | Oil & Gas Operator | Dec 2004 |
| 5340 | Innoverse Production, LLC | Gainesville, TX 76240 | Oil & Gas Operator | Oct 2025 |
| 5341 | Inpex Eagle Ford, LLC | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2022 |
| 5342 | Inspire Oil And Gas Inc. | Katy, TX 77449 | Oil & Gas Operator | Oct 2025 |
| 5343 | Integras Operating, LLC | Irving, TX 75062 | Oil & Gas Operator | Oct 2025 |
| 5344 | Integrated Operating Corporation | Dallas, TX 75243 | Oil & Gas Operator | Oct 2025 |
| 5345 | Intercity Management Corp. | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Oct 2025 |
| 5346 | Intercoast Oil And Gas | Tulsa, OK 74136 | Oil & Gas Operator | Mar 1997 |
| 5347 | Intercoast Oil And Gas Company | Tulsa, OK 74136 | Oil & Gas Operator | Jun 1997 |
| 5348 | Intercoastal Energy, Inc. | Houston, TX 77055 | Oil & Gas Operator | Aug 2003 |
| 5349 | Intergrated Petroleum Corp. | Abilene, TX 79602 | Oil & Gas Operator | Oct 2025 |
| 5350 | Interior Oil Corporation | Derby, KS 67037 | Oil & Gas Operator | Jan 2023 |
| 5351 | International Basic Res., Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 1996 |
| 5352 | International Oil&Gas Consultant | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 5353 | International Ventures, Inc. | Pogasa Springs, CO 81147 | Oil Operator | Jul 1996 |
| 5354 | International Western Oil Corp | Weatherford, TX 76086 | Oil & Gas Operator | Oct 2025 |
| 5355 | Interstate Explorations LLC | Houston, TX 77010 | Oil & Gas Operator | Oct 2025 |
| 5356 | Interstate Production Company, Inc. | Buckhannon, WV 26201-0000 | Oil & Gas Operator | Dec 2021 |
| 5357 | Invoil, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2025 |
| 5358 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 5359 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Oct 2025 |
| 5360 | Ipr Energy Partners, L.P. | Bowie, TX 76230 | Oil & Gas Operator | Aug 2014 |
| 5361 | Ipr Energy Partners, LLC | Bowie, TX 76230 | Oil & Gas Operator | Oct 2025 |
| 5362 | Ipr USA Corp. | Irving, TX 75039 | Oil & Gas Operator | Jun 2009 |
| 5363 | Ipt Oil Company | Evansville, IN 47706 | Oil & Gas Operator | Oct 2025 |
| 5364 | Ira Oil & Gas LLC | Addison, TX 75001 | Oil & Gas Operator | Jul 2008 |
| 5365 | Ira Testers | Ira, TX 79527 | Oil & Gas Operator | Mar 2024 |
| 5366 | Ira Testers, LLC | Ira, TX 79527 | Oil Operator | Oct 2025 |
| 5367 | Irion Corporation, The | San Angelo, TX 76906 | Oil & Gas Operator | Jun 2021 |
| 5368 | Irish City Oil & Gas, Inc. | Wimberley, TX 78676 | Oil & Gas Operator | Oct 2025 |
| 5369 | Irish Oil & Gas Co. | Houston, TX 77242 | Oil & Gas Operator | Aug 2003 |
| 5370 | Iron Bell Operating, LLC | Lubbock, TX 79423 | Oil & Gas Operator | Oct 2025 |
| 5371 | Iron Horse Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 5372 | Iron Orchard Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 5373 | Iron Ridge Operating, LLC | Austin, TX 78738 | Oil & Gas Operator | Oct 2025 |
| 5374 | Iron Sights Operating, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2022 |
| 5375 | Ironhorse Operations, LLC | Kilgore, TX 75663 | Oil Operator | Oct 2025 |
| 5376 | Ironroc Energy | The Woodlands, TX 77381 | Oil & Gas Operator | Oct 2025 |
| 5377 | Ironwood Oil & Gas LLC | Houston, TX 77067 | Oil & Gas Operator | Jun 2014 |
| 5378 | Irvin Petroleum | Stinnett, TX 79083 | Oil & Gas Operator | Sep 1996 |
| 5379 | Irvin Petroleum Inc. | Stinnett, TX 79083 | Oil & Gas Operator | Apr 2016 |
| 5380 | Irwin-Crum | Nocona, TX 76255 | Oil Operator | Oct 2025 |
| 5381 | Isaacson Energy Resources, LLC | Austin, TX 78741 | Oil & Gas Operator | Oct 2025 |
| 5382 | Isbell, Bob G. Operating | Cisco, TX 76437 | Oil & Gas Operator | Mar 2015 |
| 5383 | Iskandia Energy Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 5384 | Island Exploration | Houston, TX 77058 | Oil & Gas Operator | Oct 2025 |
| 5385 | Isom Energy, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | May 2018 |
| 5386 | It'LL Do Oil Company | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 5387 | Italian-American Oil Co., Inc. | Tomball, TX 77377 | Oil & Gas Operator | Oct 2025 |
| 5388 | Itech Oil Company | Cypress, TX 77429 | Oil & Gas Operator | Aug 2007 |
| 5389 | Itx Corporation | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 5390 | Itx Pipeline Company, LLC | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 5391 | Iv L.C. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 2025 |
| 5392 | Iva Oil | Cisco, TX 76437 | Oil & Gas Operator | Oct 2025 |
| 5393 | Ivory Energy, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 5394 | Iwr Operating, LLC | Dallas, TX 75248 | Oil Operator | Oct 2025 |
| 5395 | Iwt Energy Partners LLC | Denver, CO 80233 | Oil Operator | Oct 2025 |
| 5396 | J & A Oil Company | Odessa, TX 79764 | Oil & Gas Operator | Oct 2025 |
| 5397 | J & A Oil Properties | Olney, TX 76374 | Oil & Gas Operator | Aug 2018 |
| 5398 | J & A Operating | Bowie, TX 76230 | Oil & Gas Operator | Oct 2025 |
| 5399 | J & D Services | Graham, TX 76450 | Oil Operator | Feb 2017 |
| 5400 | J & F Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Oct 2025 |