| 301 | F & R Oil Co. | Dallas, TX 75205 | Oil & Gas Operator | May 2005 |
| 302 | F&H Operating Company LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 303 | Farmer Operating, LLC | Olney, TX 76374 | Oil & Gas Operator | Dec 2019 |
| 304 | Farmer, Hayden | Olney, TX 76374 | Oil & Gas Operator | Feb 1997 |
| 305 | Farmer, Lewis & Hayden | Olney, TX 76374 | Oil & Gas Operator | Oct 2008 |
| 306 | Federal Energy Development Co. | Dallas, TX 75205 | Oil & Gas Operator | Mar 2011 |
| 307 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | Dec 2025 |
| 308 | FGB Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2017 |
| 309 | Fidelity Petroleum Corporation | Plano, TX 75074 | Oil & Gas Operator | Dec 2025 |
| 310 | Fishcreek Minerals, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 311 | Five K Partnership | Graham, TX 76450 | Oil & Gas Operator | Oct 2023 |
| 312 | Five States Energy Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 313 | Flint Rock Resources MGMNT, Inc. | Austin, TX 78734 | Oil & Gas Operator | Dec 2025 |
| 314 | Foag, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2022 |
| 315 | Four Corners Energy, LLC | Gulf Breeze, FL 32563 | Oil & Gas Operator | Dec 2025 |
| 316 | Four H Oil Properties | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 317 | Fredonia Resources Inc. | Longview, TX 75606 | Oil & Gas Operator | Aug 2003 |
| 318 | Frontier Resources, Inc. | Dallas, TX 75214 | Oil & Gas Operator | Dec 2025 |
| 319 | Fullspike Energy LLC | Boyd, TX 76023 | Oil & Gas Operator | Dec 2025 |
| 320 | Fultz Oil Company | Fort Worth, TX 76121 | Oil & Gas Operator | Dec 1995 |
| 321 | Future Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 1999 |
| 322 | G & F Oil, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Dec 2025 |
| 323 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 324 | G N K Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 325 | G. A. Hawkins Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 326 | G. S. Properties, Inc. | Arlington, TX 76013 | Oil & Gas Operator | May 1999 |
| 327 | Gago, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 328 | Gala Resources, LTD. | Graham, TX 76450 | Oil & Gas Operator | Aug 2025 |
| 329 | Galilee Oil Investments LLC | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2025 |
| 330 | Gannett Operating LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 331 | Gasoco, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2005 |
| 332 | GBF Operating LLC | Morrison, CO 80465 | Oil & Gas Operator | Dec 2025 |
| 333 | GBG Operating Corp. | Wichita Falls, TX 76302 | Oil & Gas Operator | Sep 1998 |
| 334 | Gen-Sher L.L.P. | Bluegrove, TX 76352 | Oil & Gas Operator | Dec 2025 |
| 335 | General Operating Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 336 | Gerry-Mac Oil, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 337 | GGP Exploration, LTD. | Fort Worth, TX 76101 | Oil & Gas Operator | Dec 2025 |
| 338 | Ginnings Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2025 |
| 339 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Aug 2025 |
| 340 | Global Drilling, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 341 | GM Petroleum | Gulf Breeze, FL 32561 | Oil & Gas Operator | Mar 2014 |
| 342 | Gonzenbach, Glen D | Henrietta, TX 76365 | Oil & Gas Operator | Aug 2007 |
| 343 | Goodner, Tom Oil Interest | Windthorst, TX 76389 | Oil & Gas Operator | Jun 2010 |
| 344 | Goopco, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 345 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 346 | Graham Cementing Company | Graham, TX 76450 | Oil & Gas Operator | Jan 2022 |
| 347 | Grahamsource Corp. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 348 | Grand Energy, Inc. | Dallas, TX 75248 | Oil & Gas Operator | Oct 2002 |
| 349 | Gray, Mark W. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2003 |
| 350 | Greco Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 351 | Greco Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 352 | Green Petroleum Company | Archer City, TX 76351 | Oil & Gas Operator | Nov 1996 |
| 353 | Grimes, Norman W. | Canyon, TX 79015 | Oil & Gas Operator | Jul 2014 |
| 354 | Grothe Bros., Inc. | Slaton, TX 79364 | Oil & Gas Operator | Dec 2025 |
| 355 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 356 | GTG Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | Dec 2025 |
| 357 | Guidance Oil Developers | Boerne, TX 78006 | Oil & Gas Operator | Dec 2025 |
| 358 | Guidance Oil Developers, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Mar 2008 |
| 359 | Guidance Oil Developers,Inc.(1) | Boerne, TX 78006 | Oil Operator | Dec 2025 |
| 360 | Guinn Investments, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2018 |
| 361 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 362 | Gunsight Supply Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2003 |
| 363 | H & H Operating | Olney, TX 76374 | Oil & Gas Operator | Dec 2025 |
| 364 | H & S Drilling Co Inc | Frazeysburg, OH 43822 | Oil & Gas Operator | Dec 2016 |
| 365 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 366 | H P S Investments | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 367 | H&P Operating | Megargel, TX 76370 | Oil & Gas Operator | Jan 2015 |
| 368 | H. I. M. Producers | Graham, TX 76450 | Oil & Gas Operator | May 1999 |
| 369 | Haggard, E. A. | Graham, TX 76450 | Oil & Gas Operator | Apr 2001 |
| 370 | Haigood & Campbell | Archer City, TX 76351 | Oil & Gas Operator | Dec 2025 |
| 371 | Hale Oil & Gas Properties | Graham, TX 76450 | Oil & Gas Operator | Jul 1997 |
| 372 | Halek Energy L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Jan 2014 |
| 373 | Halvey Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2004 |
| 374 | Hamilton, Eddy R. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 375 | Hamilton, W. B., Estate | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2004 |
| 376 | Hane Operating, Inc. | Santa Anna, TX 76878 | Oil & Gas Operator | Sep 2005 |
| 377 | Harding Company | Dallas, TX 75244 | Oil & Gas Operator | Jan 2015 |
| 378 | Harding Exploration, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2016 |
| 379 | Hardrock Operating Company, Inc. | Fort Worth, TX 76161 | Oil & Gas Operator | Dec 2025 |
| 380 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 381 | Harper, William E. | Woodson, TX 76491 | Oil & Gas Operator | Jul 2016 |
| 382 | Harrell Operating Inc | Graham, TX 76450 | Oil & Gas Operator | Sep 2005 |
| 383 | Harrell Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Jun 2008 |
| 384 | Harrell, Charles | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 385 | Harris Energy Partners Op, LLC | Fort Worth, TX 76116 | Oil Operator | Dec 2025 |
| 386 | Harvey, James W. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2008 |
| 387 | Harwell Enterprises Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Jan 2005 |
| 388 | Hastings, J. W. Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2010 |
| 389 | Hatcher, Ray | Burkburnett, TX 76354 | Oil & Gas Operator | Jun 2002 |
| 390 | Hatler Oil Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Sep 2000 |
| 391 | Hawkins, G. A. | Graham, TX 76450 | Oil & Gas Operator | Dec 2013 |
| 392 | Haynes & Shirley Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Dec 2025 |
| 393 | Hays & Boydston | Graham, TX 76450 | Oil & Gas Operator | Mar 1994 |
| 394 | Hays Partnership | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 395 | Hays, David H. | Olney, TX 76374 | Oil & Gas Operator | Dec 1995 |
| 396 | Hays, John H. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 397 | Headline Resources, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Aug 1997 |
| 398 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 399 | Hep Oil Company, LTD. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 400 | Hep Oil GP, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |