| 301 | Entex Oil Company | | Gas Operator | Dec 1993 |
| 302 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 303 | Estate Of George Cantor | | Oil Operator | Dec 1988 |
| 304 | Estate Of L. C. Dougan | | Gas Operator | Dec 1987 |
| 305 | Etchegoin Oil LLC | | Oil & Gas Operator | May 2025 |
| 306 | Eugene E. Marble | | Oil Operator | Dec 1981 |
| 307 | Evangelical Free Church | | Oil & Gas Operator | Dec 1987 |
| 308 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Jul 2025 |
| 309 | First Chinese Baptist Church | | Oil Operator | Dec 2006 |
| 310 | First National Finance Corporation | | Oil Operator | Dec 1995 |
| 311 | First Oil And Gas Company | | Oil Operator | Apr 2025 |
| 312 | Fisk Family Farms LLC | | Gas Operator | May 2025 |
| 313 | Fleet Oil Co. | | Oil & Gas Operator | Dec 1991 |
| 314 | Floyd & Alene Jenner | | Oil & Gas Operator | Dec 2003 |
| 315 | FMR Services Inc. | | Gas Operator | Dec 2011 |
| 316 | Foothill Energy, LLC | Spring, TX 77393 | Oil & Gas Operator | Jul 2025 |
| 317 | Forest Gray Energy | | Oil & Gas Operator | Apr 2025 |
| 318 | Formax Oil Company | | Oil & Gas Operator | Dec 1993 |
| 319 | Forster Oil Co. | | Oil & Gas Operator | Dec 2016 |
| 320 | Fortune Petroleum Corporation | | Oil & Gas Operator | Dec 1994 |
| 321 | Fountain Oil And Gas Co. | | Gas Operator | Dec 1993 |
| 322 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Mar 2025 |
| 323 | Four Teams Oil Production & Exploration Inc. | | Oil & Gas Operator | Apr 2025 |
| 324 | Fourstar Resources LLC | Westlake, TX 76262 | Oil Operator | May 2025 |
| 325 | Franklin Oil Company | | Oil & Gas Operator | Dec 2005 |
| 326 | Franwin Oil And Gas Co. | | Gas Operator | Dec 1979 |
| 327 | Fred Cagle | | Oil Operator | Apr 2025 |
| 328 | Freedom Oil Company LLC | | Oil Operator | Apr 2025 |
| 329 | Freeman Oil | | Oil & Gas Operator | Jun 1995 |
| 330 | Freeport-McMoran Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 331 | Fruitvale Properties | | Oil & Gas Operator | Dec 1990 |
| 332 | G-W Resources Oper. Co. | | Gas Operator | Dec 1995 |
| 333 | G. H. Preuitt | | Oil & Gas Operator | Apr 2025 |
| 334 | G. L. Stafford Jr. | | Oil Operator | Dec 1996 |
| 335 | G.E.C. Oil And Gas Operations | | Gas Operator | Dec 1984 |
| 336 | G.E.N.Y. Operations | | Oil & Gas Operator | Dec 1999 |
| 337 | Garner Engineering Inc. | | Oil & Gas Operator | Apr 2025 |
| 338 | Gary Drilling Company | | Oil & Gas Operator | Dec 2000 |
| 339 | Gate King Properties LLC | | Oil & Gas Operator | Dec 2020 |
| 340 | General Production Oil LLC | | Oil Operator | Dec 2025 |
| 341 | Geo Investment Inc. | | Oil & Gas Operator | Dec 2003 |
| 342 | Geo Petroleum, Inc. | Borger, TX 79007 | Oil & Gas Operator | Jul 2025 |
| 343 | George A. Jones | | Oil & Gas Operator | Jan 2018 |
| 344 | George E. Wise | | Oil Operator | Dec 1989 |
| 345 | George J. Peckham Jr. | | Oil Operator | Dec 1999 |
| 346 | George Kahn Operating Co. & Robert W. Lee | | Oil & Gas Operator | Dec 2017 |
| 347 | Gergen Homes Inc. | | Oil & Gas Operator | Dec 2006 |
| 348 | Gill Ranch Storage LLC | | Oil & Gas Operator | May 2025 |
| 349 | Glendale Oil LLC | | Oil & Gas Operator | May 2025 |
| 350 | Glenn Gas Inc. | | Gas Operator | Mar 2025 |
| 351 | Go Energy Inc. | | Gas Operator | Dec 1987 |
| 352 | Golden Gate Oil Operations LLC | | Oil & Gas Operator | Apr 2025 |
| 353 | Golden Valley Energy LLC | | Oil & Gas Operator | Apr 2025 |
| 354 | Goldenwest Partners LLC | | Oil & Gas Operator | Dec 1998 |
| 355 | Gordon Dole | | Oil & Gas Operator | May 2025 |
| 356 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 357 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 358 | Graner Oil Co. | | Oil & Gas Operator | Dec 2015 |
| 359 | Grapevine Energy LLC | | Oil & Gas Operator | May 2025 |
| 360 | Gravelle Family Trust | | Oil & Gas Operator | Dec 1999 |
| 361 | Gray Development Co. LLC | | Oil & Gas Operator | May 2025 |
| 362 | Grayco Energy Explor. Inc. | | Oil & Gas Operator | Dec 2010 |
| 363 | Grayson Service Inc. | | Oil & Gas Operator | May 2025 |
| 364 | Great Basins Petroleum Co. | | Gas Operator | Mar 2015 |
| 365 | Great Western Drilling | | Oil Operator | Dec 2002 |
| 366 | Green Earth Resources Inc. | | Oil & Gas Operator | Dec 2020 |
| 367 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2025 |
| 368 | Grover Collins | | Oil & Gas Operator | Dec 2002 |
| 369 | Gustafson Brothers Inc. | | Oil & Gas Operator | Dec 2002 |
| 370 | Guzman Energy Inc. | | Oil & Gas Operator | Apr 2025 |
| 371 | H & L Operators | | Oil & Gas Operator | Dec 2002 |
| 372 | H & O Oil Co. | | Oil & Gas Operator | Dec 1989 |
| 373 | H & R Oil Company | | Oil & Gas Operator | Dec 2000 |
| 374 | H. O. Strickler Operator | | Oil & Gas Operator | Dec 1993 |
| 375 | H. T. Hilliard & Co. | | Oil & Gas Operator | Dec 1999 |
| 376 | H. W. Reynolds Jr. | | Gas Operator | Dec 1984 |
| 377 | H.L. Hall & Sons LLC | | Oil & Gas Operator | Dec 2011 |
| 378 | H.T. Olsen Oil & Gas Operations | | Oil & Gas Operator | May 2025 |
| 379 | Hamilton Brothers Oil Co. | Houston, TX 77057 | Oil & Gas Operator | Mar 2015 |
| 380 | Harcor Energy Inc. | | Gas Operator | Dec 1999 |
| 381 | Harry Feder | | Oil & Gas Operator | Dec 1999 |
| 382 | Harter Energy Inc. | Tulsa, OK 74105 | Oil & Gas Operator | May 2025 |
| 383 | Hartley Natural Resource Development | | Oil & Gas Operator | Apr 2025 |
| 384 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | Jul 2025 |
| 385 | Hathaway Company | | Oil & Gas Operator | Apr 2025 |
| 386 | Hathaway LLC | | Oil & Gas Operator | May 2025 |
| 387 | Haussler Farms Inc. | | Oil Operator | Dec 1992 |
| 388 | Havens Oil Company | Early, TX 76803 | Oil & Gas Operator | Apr 2025 |
| 389 | HDT Inc. | | Oil & Gas Operator | Apr 2025 |
| 390 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 391 | Hellman Properties LLC | | Oil & Gas Operator | May 2025 |
| 392 | Henry And Jane Fong | | Oil Operator | Dec 1989 |
| 393 | Heritage Oil Company | Norman, OK 73070 | Oil & Gas Operator | Jul 2008 |
| 394 | Herley Olive Holdings LLC | | Oil & Gas Operator | May 2025 |
| 395 | Herley Petroleum | | Oil & Gas Operator | Dec 1997 |
| 396 | Herley-Kelley LLC | | Oil & Gas Operator | May 2025 |
| 397 | Herlindah Gallegos | | Oil Operator | Dec 2007 |
| 398 | Hershey Oil Corporation | Seminole, TX 79360 | Oil & Gas Operator | Jul 1992 |
| 399 | Hexadyne Energy Corp. | | Oil & Gas Operator | Dec 2013 |
| 400 | Hickory-National Co. | | Oil Operator | Dec 1986 |