| 301 | Jovian Petroleum Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2016 |
| 302 | Joy Resources, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 2025 |
| 303 | JP Oil Wyoming LLC | Lafayette, LA 70505 | Oil & Gas Operator | Nov 2025 |
| 304 | JP Operating Inc. | Midland, TX 79705 | Gas Operator | Dec 2001 |
| 305 | JPM Eoc Operating, Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2016 |
| 306 | JPW Energy, L.L.C. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2025 |
| 307 | JQL Energy, LLC | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 308 | JRC Petroleum | Pecos, TX 79772 | Oil & Gas Operator | Dec 2025 |
| 309 | JRG Exploration, Inc. | Laredo, TX 78041 | Oil & Gas Operator | Jul 2015 |
| 310 | JRJ Oil & Gas LLC | Grapevine, TX 76099 | Oil & Gas Operator | Dec 2025 |
| 311 | Jrow Energy LLC | Lubbock, TX 79423 | Oil Operator | Dec 2025 |
| 312 | JRP Production, LLC | Boling, TX 77420 | Oil Operator | Dec 2025 |
| 313 | JRP Resources, L.C. | Midland, TX 79708 | Oil & Gas Operator | May 1995 |
| 314 | JSD Oil, LTD. | Seguin, TX 78155 | Oil Operator | Nov 2013 |
| 315 | JSK Oilfield Service LLC | Santa Anna, TX 76878 | Oil Operator | Dec 2025 |
| 316 | JSM Natural Resources, L.L.C. | Victoria, TX 77904 | Oil & Gas Operator | Dec 2018 |
| 317 | JTB Oil Company, Inc. | Refugio, TX 78377 | Oil & Gas Operator | Dec 2025 |
| 318 | JTC Royalties LLC | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 319 | Jtex Oil Company, LLC | Colorado City, TX 79512 | Oil & Gas Operator | Jan 2025 |
| 320 | JTL Oil Company LLC | Wichita Falls, TX 76305 | Oil & Gas Operator | Dec 2025 |
| 321 | JTL Operating Co Inc | Katy, TX 77450 | Oil & Gas Operator | Dec 2025 |
| 322 | Jubilee Oil And Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Nov 2009 |
| 323 | Jubilee Oil Corporation | Denison, TX 75020 | Oil Operator | Oct 2012 |
| 324 | Jubilee Resources, LTD. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Dec 2025 |
| 325 | Jud,L.C. | Corpus Chrsti, TX 78473 | Gas Operator | Jul 2003 |
| 326 | Judah Oil | Artesia, NM 88211 | Oil & Gas Operator | Mar 2010 |
| 327 | Julil Energy, LLC | Richmond, TX 77406 | Oil & Gas Operator | Dec 2024 |
| 328 | Juna Operating Co. | Corsicana, TX 75151 | Oil & Gas Operator | Dec 1996 |
| 329 | Juna Operating, Inc. | Corsicana, TX 75151 | Oil & Gas Operator | Nov 2008 |
| 330 | Juneau Energy, LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 331 | Juno Operating Company II LLC | Plano, TX 75093 | Oil & Gas Operator | Sep 2018 |
| 332 | Juno Operating Company III, LLC | Plano, TX 75093 | Oil & Gas Operator | Dec 2025 |
| 333 | Juno Operating Company, LLC | Plano, TX 75093 | Oil & Gas Operator | Jul 2011 |
| 334 | Jupiter Energy LLC | Richmond, TX 77469 | Oil Operator | Dec 2025 |
| 335 | Jura Energy Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 336 | Jurassic Energy Corporation | Crosby, TX 77532 | Oil & Gas Operator | Dec 2025 |
| 337 | Jurassic Exploration, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2025 |
| 338 | Jurassic Operating Company | Houston, TX 77099 | Oil & Gas Operator | Dec 2025 |
| 339 | Just Oil | Midland, TX 79707 | Oil & Gas Operator | Dec 2025 |
| 340 | Just Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 341 | Justiss Oil Company, Inc. | Jena, LA 71342 | Oil & Gas Operator | Sep 2025 |
| 342 | Jva Operating Company | Midland, TX 79710 | Oil & Gas Operator | Oct 2021 |
| 343 | JW Energy Co., LTD | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2000 |
| 344 | JWC Oil Operator, LLC | MC Queeney, TX 78123 | Oil Operator | May 2018 |
| 345 | Jwimco, L.L.C. | Dallas, TX 75229 | Oil & Gas Operator | Nov 2025 |