| 301 | Fasken, Barbara | Midland, TX 79701 | Oil & Gas Operator | Dec 1995 |
| 302 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | May 2025 |
| 303 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 304 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | May 2025 |
| 305 | Fivestones Energy LLC | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 306 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | May 2025 |
| 307 | Floyd Operating Company | Houston, TX 77002 | Oil & Gas Operator | Jul 2004 |
| 308 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 309 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 310 | Forge Energy, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Apr 2019 |
| 311 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | May 2025 |
| 312 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 313 | Fortune Natural Resources Corp. | Houston, TX 77067 | Oil & Gas Operator | Dec 2003 |
| 314 | Fossil Fuels Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2000 |
| 315 | Fossil Rock Resources, Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | May 2016 |
| 316 | Four C Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 317 | Fourway Oil Company | Longview, TX 75606 | Oil & Gas Operator | May 2025 |
| 318 | Fredonia Resources Inc. | Longview, TX 75606 | Oil & Gas Operator | Aug 2003 |
| 319 | Friemel & Carpenter, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2002 |
| 320 | Friemel, Paul D. & Assoc., Inc. | Boerne, TX 78006 | Oil & Gas Operator | Mar 2007 |
| 321 | Frio Engineering Inc. | Houston, TX 77066 | Oil & Gas Operator | May 2025 |
| 322 | Frisco Energy, L.L.C. | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2025 |
| 323 | Fueled Resources Inc | Boyd, TX 76023 | Oil & Gas Operator | May 2025 |
| 324 | Fulfer Oil And Cattle Co. | Jal, NM 88252 | Oil & Gas Operator | May 2025 |
| 325 | Fuller Petroleum Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 326 | Fuller Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 327 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 328 | Gap Exploration, LTD. | Naples, FL 34110 | Oil & Gas Operator | Jul 2008 |
| 329 | Gardner Energy Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 1999 |
| 330 | Gcofer LLC | Hobbs, NM 88240 | Oil Operator | May 2025 |
| 331 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 332 | Giebel Petroleum LTD. | Midland, TX 79705 | Oil & Gas Operator | Jul 2019 |
| 333 | Goodnight Midstream Permian, LLC | Dallas, TX 75206 | Oil & Gas Operator | May 2025 |
| 334 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 335 | Grace Petroleum Operating, LLC | Llano, TX 78643 | Oil & Gas Operator | May 2025 |
| 336 | Grace Petroleum, L.P. | Midland, TX 79708 | Oil & Gas Operator | May 2016 |
| 337 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 338 | Graham, Bill J. Oil & Gas Corp. | Midland, TX 79710 | Oil & Gas Operator | Nov 2000 |
| 339 | Grama Operating, LLC | Fort Worth, TX 76109 | Oil & Gas Operator | May 2025 |
| 340 | Grand Banks Energy Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 341 | Grasha, Matthew P. | Midland, TX 79709 | Oil & Gas Operator | Feb 1995 |
| 342 | Grayrock Energy II, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | May 2025 |
| 343 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 344 | Greenbrier Oper. Co. | Dallas, TX 75229 | Oil & Gas Operator | Feb 2001 |
| 345 | Greenhill Petroleum Corporation | Houston, TX 77077 | Oil & Gas Operator | Jan 1998 |
| 346 | Greystone Oil & Gas, LLP | Houston, TX 77057 | Oil & Gas Operator | Dec 2015 |
| 347 | Greystone Petroleum, LLC | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 348 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | May 2025 |
| 349 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 350 | Grover-McKinney Oil Company | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 351 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 352 | Guthrie, A. K. Operating Co. | Big Spring, TX 79720 | Oil & Gas Operator | Mar 1996 |
| 353 | H & O Operating Co | Odessa, TX 79764 | Oil & Gas Operator | Mar 2008 |
| 354 | H & S Drilling Co Inc | Frazeysburg, OH 43822-0040-0040 | Oil & Gas Operator | Dec 2016 |
| 355 | H & W Oil Company, Incorporated | Palm Desert, CA 92255 | Oil Operator | Nov 2017 |
| 356 | H&M Production, Inc. | New Braunfels, TX 78132 | Oil & Gas Operator | Aug 2012 |
| 357 | Hamon Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2011 |
| 358 | Hanley Petroleum Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2017 |
| 359 | Hannathon Petroleum, LLC | Midland, TX 79705 | Oil & Gas Operator | May 2025 |
| 360 | Hanson Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2008 |
| 361 | Hanson Operating Company Inc | Roswell, NM 88202 | Oil & Gas Operator | Feb 2025 |
| 362 | Hanvey, Don H. Oil Interests Inc | Cisco, TX 76437 | Oil & Gas Operator | May 2025 |
| 363 | Harrison Interests, LTD. | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 364 | Hartel, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Aug 1997 |
| 365 | Harter, Ron | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 366 | Harvard Petroleum Corporation | Roswell, NM 88201 | Oil & Gas Operator | Dec 2004 |
| 367 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | May 2025 |
| 368 | Hat Oil & Gas, Inc. | Slaton, TX 79364 | Oil & Gas Operator | Feb 2002 |
| 369 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 370 | HCM | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 371 | Headline Resources, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Aug 1997 |
| 372 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Feb 2025 |
| 373 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 374 | Hendon WM E. Jr. Rev LVNG Trust | Everett, WA 98208 | Oil & Gas Operator | May 2025 |
| 375 | Hendrix, John H. Corporation | Midland, TX 79705 | Oil & Gas Operator | Sep 2018 |
| 376 | Henry Petroleum Corp. | Midland, TX 79703 | Oil & Gas Operator | Mar 2001 |
| 377 | Henry Petroleum LP | Midland, TX 79701 | Oil & Gas Operator | Dec 2008 |
| 378 | Henry Resources LLC | Midland, TX 79703 | Oil & Gas Operator | May 2025 |
| 379 | Herbig Oil & Gas Co. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 380 | Herbig, J F | Midland, TX 79701 | Oil & Gas Operator | Mar 1998 |
| 381 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 382 | Hicon Gas Producers, Inc. | New York, NY 10110 | Oil & Gas Operator | Oct 1999 |
| 383 | High Sky Partners LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2015 |
| 384 | Highmark Energy Operating, LLC | Dallas, TX 75222 | Oil & Gas Operator | May 2025 |
| 385 | Highmount Expl & Prod Texas LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2014 |
| 386 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | May 2025 |
| 387 | Hilliard Oil & Gas Inc | New Orleans, LA 70112 | Oil & Gas Operator | May 2001 |
| 388 | Hillin Prod. Co. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2002 |
| 389 | Hillin-Simon Oil Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2013 |
| 390 | Hillside Oil & Gas, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2016 |
| 391 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 392 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | May 2025 |
| 393 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | May 2025 |
| 394 | Huff, Jack | Midland, TX 79710 | Oil & Gas Operator | Dec 2004 |
| 395 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 396 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | May 2025 |
| 397 | Huntington Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2006 |
| 398 | Hybrid Operating, Incorporated | Carlsbad, CA 92009 | Oil & Gas Operator | May 2025 |
| 399 | Ica Energy Operating, L.L.C. | Odessa, TX 79760 | Oil & Gas Operator | May 2025 |
| 400 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |