| 301 | Gage, H. L. | Windthorst, TX 76389 | Oil & Gas Operator | May 2005 |
| 302 | Gala Resources, LTD. | Graham, TX 76450 | Oil & Gas Operator | Feb 2025 |
| 303 | Gannett Operating LLC | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 304 | Gantt, Joe, Properties | Electra, TX 76360 | Oil & Gas Operator | Aug 2003 |
| 305 | Gardner Energy Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 1999 |
| 306 | Gasoco, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2005 |
| 307 | Gator Development, Inc. | Vernon, TX 76384 | Oil Operator | Dec 2004 |
| 308 | GBF Operating LLC | Morrison, CO 80465 | Oil & Gas Operator | May 2025 |
| 309 | GBG Operating Corp. | Wichita Falls, TX 76302 | Oil & Gas Operator | Sep 1998 |
| 310 | Gen-Sher | Bluegrove, TX 76352 | Oil & Gas Operator | Feb 2005 |
| 311 | Gen-Sher L.L.P. | Bluegrove, TX 76352 | Oil & Gas Operator | May 2025 |
| 312 | Genepa Petroleum Company | Spring, TX 77379 | Oil & Gas Operator | May 2025 |
| 313 | General Oil Company, Inc. | Wichita, KS 67213 | Oil & Gas Operator | May 2025 |
| 314 | Geonatural Resources, Inc. | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 315 | Gerry-Mac Oil, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 316 | GGP Exploration, LTD. | Fort Worth, TX 76101 | Oil & Gas Operator | May 2025 |
| 317 | Gilmore, Leo Oil, Inc. | Holliday, TX 76366 | Oil & Gas Operator | May 2025 |
| 318 | Ginnings Company | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2025 |
| 319 | Glen D. Gonzenbach, LLC | Henrietta, TX 76365 | Oil & Gas Operator | Dec 2016 |
| 320 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Feb 2025 |
| 321 | Glenn, Lyndell | Wichita Falls, TX 76310 | Oil & Gas Operator | May 2025 |
| 322 | Golden, Marty Joe | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 323 | Gonzenbach Oil & Gas, LLC | Henrietta, TX 76365 | Oil & Gas Operator | May 2020 |
| 324 | Gonzenbach, Glen D | Henrietta, TX 76365 | Oil & Gas Operator | Aug 2007 |
| 325 | Grace, Jack Production Co, LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | May 2025 |
| 326 | Grace, Jack, Prod. Co. | Wichita Falls, TX 76302 | Oil & Gas Operator | Mar 1997 |
| 327 | Gray Production Trust | Dallas, TX 75261 | Oil & Gas Operator | Jul 2003 |
| 328 | Great American Resources Inc. | Bowie, TX 76230 | Oil & Gas Operator | May 2025 |
| 329 | Greco Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 330 | Green Petroleum Company | Archer City, TX 76351 | Oil & Gas Operator | Nov 1996 |
| 331 | Greenville Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Oct 1996 |
| 332 | Grey Rider Energy, LLC | Schertz, TX 78154 | Oil & Gas Operator | May 2025 |
| 333 | Grimes, Norman W. | Canyon, TX 79015 | Oil & Gas Operator | Jul 2014 |
| 334 | Grothe Bros., Inc. | Slaton, TX 79364 | Oil & Gas Operator | May 2025 |
| 335 | Grothe, M.L. Est. | Slaton, TX 79364 | Oil & Gas Operator | May 2025 |
| 336 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 337 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 338 | Guidance Oil Developers | Boerne, TX 78006 | Oil & Gas Operator | May 2025 |
| 339 | Guidance Oil Developers, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Mar 2008 |
| 340 | Guidance Oil Developers,Inc.(1) | Boerne, TX 78006 | Oil Operator | May 2025 |
| 341 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 342 | Gunsight Supply Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2003 |
| 343 | H & H Operating | Olney, TX 76374 | Oil & Gas Operator | May 2025 |
| 344 | H & H Production | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2015 |
| 345 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 346 | H&P Operating | Megargel, TX 76370 | Oil & Gas Operator | Jan 2015 |
| 347 | H-Two-O Investments | Iowa Park, TX 76367 | Oil Operator | Sep 2019 |
| 348 | H. I. M. Producers | Graham, TX 76450 | Oil & Gas Operator | May 1999 |
| 349 | Haggard, E. A. | Graham, TX 76450 | Oil & Gas Operator | Apr 2001 |
| 350 | Haigood & Campbell | Archer City, TX 76351 | Oil & Gas Operator | May 2025 |
| 351 | Hale Oil & Gas Properties | Graham, TX 76450 | Oil & Gas Operator | Jul 1997 |
| 352 | Hammon Properties | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1996 |
| 353 | Hanaco, LLC | Holliday, TX 76366 | Oil Operator | Dec 2017 |
| 354 | Hannis Operating, LLC | Olney, TX 76374 | Oil & Gas Operator | May 2025 |
| 355 | Hardrock Operating Company, Inc. | Fort Worth, TX 76161 | Oil & Gas Operator | May 2025 |
| 356 | Harmel And Shawver Oil LLC | Wichita Falls, TX 76310 | Oil Operator | May 2025 |
| 357 | Harvey, James W. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2008 |
| 358 | Hastings, J. W. Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2010 |
| 359 | Hat Oil & Gas, Inc. | Slaton, TX 79364 | Oil & Gas Operator | Feb 2002 |
| 360 | Hatcher, Ray | Burkburnett, TX 76354 | Oil & Gas Operator | Jun 2002 |
| 361 | Hawkins, G. A. | Graham, TX 76450 | Oil & Gas Operator | Dec 2013 |
| 362 | Haynes & Shirley Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | May 2025 |
| 363 | Hays & Boydston | Graham, TX 76450 | Oil & Gas Operator | Mar 1994 |
| 364 | Hays & Croker Partnership | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 365 | Hays Partnership | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 366 | Hays, David H. | Olney, TX 76374 | Oil & Gas Operator | Dec 1995 |
| 367 | Hays, John H. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 368 | Helmcamp, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2002 |
| 369 | Henderson, Sam W. | Iowa Park, TX 76367 | Oil & Gas Operator | Jun 2019 |
| 370 | Herencia Operating LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2025 |
| 371 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 372 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | May 2025 |
| 373 | Heydrick Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 374 | Hickman & Ickert | Olney, TX 76374 | Oil & Gas Operator | Feb 2002 |
| 375 | Hilbers Oil & Gas | Archer City, TX 76351 | Oil & Gas Operator | Oct 2002 |
| 376 | Hill, Hub, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jan 1994 |
| 377 | Hill, R.M. Operating Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 378 | Hoco Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 379 | Hodgden Operating Co., Inc. | Enid, OK 73702 | Oil & Gas Operator | Mar 2025 |
| 380 | Hoggard, Kenneth | Loving, TX 76460 | Oil & Gas Operator | May 2025 |
| 381 | Holcomb Company, The | Freer, TX 78357 | Oil & Gas Operator | Aug 1996 |
| 382 | Holli-Tex Supply Co. | Holliday, TX 76366 | Oil & Gas Operator | May 2018 |
| 383 | Holliday CSG Corp. | Holliday, TX 76366 | Oil & Gas Operator | May 2025 |
| 384 | Hood, J. F. | Holliday, TX 76366 | Oil & Gas Operator | Apr 2010 |
| 385 | Hood, J. Frank, Jr. | Arlington, TX 76006 | Oil & Gas Operator | May 2025 |
| 386 | Hood, Joe B. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2008 |
| 387 | Horany, Ray & Ernest | Olney, TX 76374 | Oil & Gas Operator | May 2002 |
| 388 | Horn, W. J. | Graham, TX 76450 | Oil & Gas Operator | Oct 2004 |
| 389 | HRH Energy Group Incorporated | Carrollton, TX 75006 | Oil & Gas Operator | Nov 2009 |
| 390 | Hughes & Shawver | Olney, TX 76374 | Oil & Gas Operator | Aug 1996 |
| 391 | Hughes Oil Company Inc | Odessa, TX 79765 | Oil & Gas Operator | Feb 2004 |
| 392 | Hughes, Bill Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 393 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 394 | Hull Oil Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2021 |
| 395 | Hulse, J. T. | Archer City, TX 76351 | Oil & Gas Operator | May 2025 |
| 396 | Hulse, Tommy P. | Archer City, TX 76351 | Oil & Gas Operator | Feb 2009 |
| 397 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 398 | Hunt, Hassie Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 399 | Hunter Brothers | Wichita Falls, TX 76302 | Oil & Gas Operator | Jul 2007 |
| 400 | Huston Minerals LP | Albany, TX 76430 | Oil & Gas Operator | May 2025 |