| 201 | Firebird Energy II LLC | Fort Worth, TX 76107 | Oil & Gas Operator | May 2025 |
| 202 | Firebird Energy LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2022 |
| 203 | First Reserve Oil & Gas Co | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 204 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | May 2025 |
| 205 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 206 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 207 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | May 2025 |
| 208 | Fort Worth Production Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 1996 |
| 209 | Forte Energy Corporation | Dallas, TX 75205 | Oil & Gas Operator | Dec 2010 |
| 210 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 211 | Fortune Natural Resources Corp. | Houston, TX 77067 | Oil & Gas Operator | Dec 2003 |
| 212 | Four C Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 213 | Free Rein Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | May 2025 |
| 214 | Friemel & Carpenter, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2002 |
| 215 | Fuller Petroleum Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 216 | Fuller Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 217 | Furr, Roy Estate Of | Midland, TX 79702 | Oil & Gas Operator | Jun 2016 |
| 218 | Gilliam'S Aghorn Energy | Odessa, TX 79768 | Oil & Gas Operator | May 1997 |
| 219 | Ginger Oil Company (A) | The Woodlands, TX 77380 | Oil & Gas Operator | Jan 2016 |
| 220 | Glacier Park Company | Houston, TX 77252 | Oil & Gas Operator | Aug 2001 |
| 221 | Global Natural Resources Corp. | Houston, TX 77002 | Oil & Gas Operator | May 1998 |
| 222 | Golden Specialties Oil & Gas | Midland, TX 79708 | Oil & Gas Operator | May 2025 |
| 223 | Golden, Marty Joe | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 224 | Gouger Oil Co. | San Antonio, TX 78217 | Oil & Gas Operator | Nov 1995 |
| 225 | Graham, Bill J. Oil & Gas Corp. | Midland, TX 79710 | Oil & Gas Operator | Nov 2000 |
| 226 | Graham, H.E. | Imperial, TX 79743 | Oil & Gas Operator | Mar 2007 |
| 227 | Grand Banks Energy Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 228 | GRB Properties, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2003 |
| 229 | Great Basin Petroleum Serv, Inc. | Odessa, TX 79765 | Oil & Gas Operator | Nov 2002 |
| 230 | Great Basin Petroleum Serv, L.P. | Odessa, TX 79765 | Oil & Gas Operator | Jul 2008 |
| 231 | Great Basin Well Service Corp. | Odessa, TX 79765 | Oil & Gas Operator | Feb 2025 |
| 232 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 233 | Green Century Exp & Prod, LLC | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 234 | Greenstone Energy, LLC | Houston, TX 77208 | Oil Operator | May 2025 |
| 235 | Greka Am Inc | Santa Maria, CA 93454 | Oil & Gas Operator | May 2013 |
| 236 | Grizzle, Joe B. | Paris, TX 75461 | Oil & Gas Operator | May 2025 |
| 237 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 238 | Grover-McKinney Oil Company | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 239 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 240 | Guadalupe Properties, LLC | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2013 |
| 241 | H & O Operating Co | Odessa, TX 79764 | Oil & Gas Operator | Mar 2008 |
| 242 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 2025 |
| 243 | Hanley Petroleum Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2017 |
| 244 | Hanson Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2008 |
| 245 | Hanvey, Don H. Oil Interests Inc | Cisco, TX 76437 | Oil & Gas Operator | May 2025 |
| 246 | Harkey Energy Inc. | Odessa, TX 79762 | Oil & Gas Operator | Feb 2020 |
| 247 | Harmony Drilling Company, Inc. | Denver, CO 80222 | Oil & Gas Operator | Nov 2016 |
| 248 | Hat Oil & Gas, Inc. | Slaton, TX 79364 | Oil & Gas Operator | Feb 2002 |
| 249 | Hawkeye Transmission Company | Dallas, TX 75244 | Oil & Gas Operator | Jun 2000 |
| 250 | Haylan Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jan 2000 |
| 251 | Headington Energy Partners, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2025 |
| 252 | Headline Resources, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Aug 1997 |
| 253 | Heifer Production Company LLC | Austin, TX 78746 | Oil & Gas Operator | May 2025 |
| 254 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Feb 2025 |
| 255 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 256 | Hendrix, John H. Corporation | Midland, TX 79705 | Oil & Gas Operator | Sep 2018 |
| 257 | Henry Resources LLC | Midland, TX 79703 | Oil & Gas Operator | May 2025 |
| 258 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | May 2025 |
| 259 | High Desert Resources, L.L.C. | Midland, TX 79704 | Oil Operator | May 2025 |
| 260 | Highland Production Company | Midland, TX 79701 | Oil & Gas Operator | Mar 1996 |
| 261 | Highpeak Energy Holdings, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 262 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | May 2025 |
| 263 | Hillin Prod. Co. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2002 |
| 264 | Hillin-Simon Oil Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2013 |
| 265 | Hillside Oil & Gas, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2016 |
| 266 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | May 2025 |
| 267 | Home-Stake Oil & Gas Company | Plano, TX 75093 | Oil & Gas Operator | Feb 2025 |
| 268 | Hondo Drilling Company | Midland, TX 79702 | Oil & Gas Operator | Nov 1996 |
| 269 | Hopkins, T. M. Operating Co. | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 270 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 271 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 272 | Hunter Oil & Gas Co. | Bangs, TX 76823 | Oil & Gas Operator | May 2025 |
| 273 | Hyquest Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2015 |
| 274 | Ica Energy Operating, L.L.C. | Odessa, TX 79760 | Oil & Gas Operator | May 2025 |
| 275 | Incline Energy | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 276 | Ipt Oil Company | Evansville, IN 47706 | Oil & Gas Operator | May 2025 |
| 277 | Iron Orchard Operating LLC | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 278 | Iskandia Energy Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 279 | Jamex, Inc. | Lewisville, TX 75067 | Oil & Gas Operator | May 2025 |
| 280 | JC Enterprises | Andrews, TX 79714 | Oil & Gas Operator | Jun 2012 |
| 281 | Jetta Operating Company Inc | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 282 | JM Calk Operating, LLC | Lytle, TX 78052 | Oil Operator | May 2025 |
| 283 | JN Exploration & Production LP | Billings, MT 59103 | Oil & Gas Operator | Jan 2001 |
| 284 | Jones, L. E. Operating, Inc. | Duncan, OK 73534 | Oil & Gas Operator | May 2025 |
| 285 | JTL Operating Co Inc | Katy, TX 77450 | Oil & Gas Operator | May 2025 |
| 286 | Just Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 287 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | May 2025 |
| 288 | Kebo Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | May 2025 |
| 289 | Kennedy, R. R. Production, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | May 2025 |
| 290 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Mar 2025 |
| 291 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 292 | Keystone Petroleum GP LLC | Irving, TX 75039 | Oil & Gas Operator | May 2012 |
| 293 | Kidd Johnson Oil & Gas | San Angelo, TX 76904 | Oil & Gas Operator | Feb 2013 |
| 294 | Kidd Johnson Oil & Gas, LLC | San Angelo, TX 76904 | Oil & Gas Operator | May 2025 |
| 295 | Kimbell Oil Company Of Texas | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 296 | Kinder Morgan Production Co LLC | Midland, TX 79705 | Oil & Gas Operator | May 2025 |
| 297 | KLM Petroleum Corp. | Midland, TX 79705 | Oil & Gas Operator | May 2025 |
| 298 | Kneupper Oil, LLC | MC Camey, TX 79752 | Oil & Gas Operator | May 2025 |
| 299 | Kodiak Productions LTD | Big Lake, TX 76932 | Oil & Gas Operator | Mar 2014 |
| 300 | KRF Production Company LLC | Houston, TX 77269 | Oil & Gas Operator | May 2025 |