| 5501 | Indigo Minerals LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 5502 | Indigo Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2019 |
| 5503 | Indy Oil, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2004 |
| 5504 | Ineos USA Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 5505 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 5506 | Infinity Oil & Gas Inc | Nowata, OK 74048 | Oil Operator | Jun 1993 |
| 5507 | Infinity Oil & Gas Of TX, Inc. | Overland Park, KS 66210 | Oil & Gas Operator | Feb 2026 |
| 5508 | Ingram, J. Oil & Gas, Inc. | Plano, TX 75074 | Oil & Gas Operator | Feb 2026 |
| 5509 | Initial Energy Services, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Feb 2026 |
| 5510 | Inject Technologies Inc. | Andrews, TX 79714 | Oil Operator | Feb 2026 |
| 5511 | Inland Gas Corp. | Houston, TX 77036 | Oil Operator | Dec 2011 |
| 5512 | Inland Minerals Management, Inc. | Austin, TX 78701 | Oil & Gas Operator | Feb 2026 |
| 5513 | Inland Ocean, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Feb 2026 |
| 5514 | Inland Oil And Gas Company, Inc. | Chireno, TX 75937 | Oil & Gas Operator | Jun 2005 |
| 5515 | Inland Production Company | Vernal, UT 84079 | Oil & Gas Operator | Dec 2004 |
| 5516 | Innoverse Production, LLC | Gainesville, TX 76240 | Oil & Gas Operator | Feb 2026 |
| 5517 | Inpex Eagle Ford, LLC | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2022 |
| 5518 | Inspire Oil And Gas Inc. | Katy, TX 77449 | Oil Operator | Feb 2026 |
| 5519 | Integras Operating, LLC | Irving, TX 75062 | Oil & Gas Operator | Feb 2026 |
| 5520 | Integrated Operating Corporation | Dallas, TX 75243 | Oil & Gas Operator | Feb 2026 |
| 5521 | Intercity Management Corp. | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Feb 2026 |
| 5522 | Intercoast Oil And Gas | Tulsa, OK 74136 | Oil & Gas Operator | Mar 1997 |
| 5523 | Intercoast Oil And Gas Company | Tulsa, OK 74136 | Oil & Gas Operator | Jun 1997 |
| 5524 | Intercoastal Energy, Inc. | Houston, TX 77055 | Oil & Gas Operator | Aug 2003 |
| 5525 | Intergrated Petroleum Corp. | Abilene, TX 79602 | Oil & Gas Operator | Feb 2026 |
| 5526 | Interior Oil Corporation | Derby, KS 67037 | Oil & Gas Operator | Jan 2023 |
| 5527 | International Basic Res., Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 1996 |
| 5528 | International Oil&Gas Consultant | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 5529 | International Ventures Inc | Pogasa Springs, CO 81147 | Oil Operator | Jul 1996 |
| 5530 | International Western Oil Corp | Weatherford, TX 76086 | Oil & Gas Operator | Feb 2026 |
| 5531 | Interstate Explorations LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2026 |
| 5532 | Interstate Production Company, Inc. | Buckhannon, WV 26201-0000 | Oil & Gas Operator | Dec 2021 |
| 5533 | Invoil, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2026 |
| 5534 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 5535 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Feb 2026 |
| 5536 | Ipr Energy Partners, L.P. | Bowie, TX 76230 | Oil & Gas Operator | Aug 2014 |
| 5537 | Ipr Energy Partners, LLC | Bowie, TX 76230 | Oil & Gas Operator | Feb 2026 |
| 5538 | Ipr USA Corp. | Irving, TX 75039 | Oil & Gas Operator | Jun 2009 |
| 5539 | Ipt Oil Company | Evansville, IN 47706 | Oil & Gas Operator | Feb 2026 |
| 5540 | Ira Oil & Gas LLC | Addison, TX 75001 | Oil & Gas Operator | Jul 2008 |
| 5541 | Ira Testers | Ira, TX 79527 | Oil & Gas Operator | Mar 2024 |
| 5542 | Ira Testers, LLC | Ira, TX 79527 | Oil Operator | Feb 2026 |
| 5543 | Irion Corporation, The | San Angelo, TX 76906 | Oil & Gas Operator | Jun 2021 |
| 5544 | Irish City Oil & Gas, Inc. | Wimberley, TX 78676 | Oil & Gas Operator | Feb 2026 |
| 5545 | Irish Oil & Gas Co. | Houston, TX 77242 | Oil & Gas Operator | Aug 2003 |
| 5546 | Iron Bell Operating, LLC | Lubbock, TX 79423 | Oil & Gas Operator | Feb 2026 |
| 5547 | Iron Horse Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Feb 2026 |
| 5548 | Iron Orchard Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 5549 | Iron Ridge Operating, LLC | Austin, TX 78738 | Oil & Gas Operator | Feb 2026 |
| 5550 | Iron Sights Operating, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2022 |
| 5551 | Ironbloom Operating, LLC | La Grange, TX 78945 | Oil & Gas Operator | Feb 2026 |
| 5552 | Ironhorse Operations, LLC | Kilgore, TX 75663 | Oil Operator | Feb 2026 |
| 5553 | Ironroc Energy | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2026 |
| 5554 | Ironwood Oil & Gas LLC | Houston, TX 77067 | Oil & Gas Operator | Jun 2014 |
| 5555 | Irvin Petroleum | Stinnett, TX 79083 | Oil & Gas Operator | Sep 1996 |
| 5556 | Irvin Petroleum Inc. | Stinnett, TX 79083 | Oil & Gas Operator | Apr 2016 |
| 5557 | Irwin-Crum | Nocona, TX 76255 | Oil Operator | Feb 2026 |
| 5558 | Isaacson Energy Resources, LLC | Austin, TX 78741 | Oil & Gas Operator | Feb 2026 |
| 5559 | Isbell, Bob G. Operating | Cisco, TX 76437 | Oil & Gas Operator | Mar 2015 |
| 5560 | Iskandia Energy Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 5561 | Island Exploration | Houston, TX 77058 | Oil & Gas Operator | Feb 2026 |
| 5562 | Isom Energy, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | May 2018 |
| 5563 | It'LL Do Oil Company | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 5564 | Italian-American Oil Co., Inc. | Tomball, TX 77377 | Oil & Gas Operator | Feb 2026 |
| 5565 | Itech Oil Company | Cypress, TX 77429 | Oil & Gas Operator | Aug 2007 |
| 5566 | Itx Corporation | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 5567 | Itx Pipeline Company, LLC | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 5568 | Iv L.C. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2026 |
| 5569 | Iva Oil | Cisco, TX 76437 | Oil & Gas Operator | Feb 2026 |
| 5570 | Ivory Energy, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 5571 | Iwr Operating, LLC | Dallas, TX 75248 | Oil Operator | Feb 2026 |
| 5572 | Iwt Energy Partners LLC | Denver, CO 80233 | Oil Operator | Feb 2026 |
| 5573 | J & A Oil Company | Odessa, TX 79764 | Oil & Gas Operator | Feb 2026 |
| 5574 | J & A Oil Properties | Olney, TX 76374 | Oil & Gas Operator | Aug 2018 |
| 5575 | J & A Operating | Bowie, TX 76230 | Oil & Gas Operator | Feb 2026 |
| 5576 | J & D Services | Graham, TX 76450 | Oil Operator | Feb 2017 |
| 5577 | J & F Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Feb 2026 |
| 5578 | J & G Enterprise LTD., Co. | Artesia, NM 88211 | Oil & Gas Operator | Nov 1997 |
| 5579 | J & J Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Mar 2015 |
| 5580 | J & J Oil Company LLC | Lubbock, TX 79424 | Oil Operator | Feb 2026 |
| 5581 | J & J Oil Venture | Jacksonville, TX 75766 | Oil & Gas Operator | Aug 1996 |
| 5582 | J & J Oil, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2012 |
| 5583 | J & J Operating | Graford, TX 76449 | Oil & Gas Operator | Feb 2026 |
| 5584 | J & J Services Company | San Angelo, TX 76904 | Oil & Gas Operator | Feb 2026 |
| 5585 | J & J Trading | Abilene, TX 79608 | Oil & Gas Operator | Dec 2004 |
| 5586 | J & J Whiteside Inc. | Comanche, TX 76442 | Oil & Gas Operator | Feb 2026 |
| 5587 | J & K Production LLC | Konawa, OK 74849 | Oil Operator | Oct 2025 |
| 5588 | J & L Partners | Dallas, TX 75370 | Oil & Gas Operator | Dec 2005 |
| 5589 | J & M Co Inc | Abilene, TX 79601 | Oil & Gas Operator | Jan 2016 |
| 5590 | J & M Production | Luling, TX 78648 | Oil & Gas Operator | Nov 2019 |
| 5591 | J & M SWD, LLC | Stamford, TX 79553 | Oil Operator | Feb 2026 |
| 5592 | J & R Producing Co. | Plano, TX 75024 | Oil & Gas Operator | Dec 2012 |
| 5593 | J & S Gas Company | Ranger, TX 76470 | Oil & Gas Operator | Oct 2003 |
| 5594 | J & S Oil Company | Graham, TX 76450 | Oil & Gas Operator | Apr 2022 |
| 5595 | J & S Operating | Shiner, TX 77984 | Oil & Gas Operator | Dec 2002 |
| 5596 | J & TG, LLC | Albany, TX 76430 | Oil & Gas Operator | Feb 2026 |
| 5597 | J & W Oil Co.-W. F. | Eastland, TX 76448 | Oil & Gas Operator | Feb 2026 |
| 5598 | J B Energy, Inc. | Denton, TX 76206 | Oil & Gas Operator | Aug 2018 |
| 5599 | J B J Oil Properties, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 5600 | J Bar D | Jacksboro, TX 76458 | Oil & Gas Operator | Feb 2026 |