| 201 | Fore Oil, LLC | Manvel, TX 77578 | Oil Operator | May 2021 |
| 202 | Forney & McCombs | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 203 | Forney Oil Corporation | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 204 | Fort Apache Energy, Inc. | Boerne, TX 78015 | Oil & Gas Operator | May 2025 |
| 205 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | May 2025 |
| 206 | Fourth Floor Operating LLC | Austin, TX 78746 | Oil & Gas Operator | May 2025 |
| 207 | Frazier Resources Company | Houston, TX 77057 | Gas Operator | May 2004 |
| 208 | Frio Exploration Company | Pearland, TX 77588 | Oil & Gas Operator | Dec 2000 |
| 209 | Fuji Resources Production Co,Inc | Houston, TX 77036 | Oil & Gas Operator | Feb 2000 |
| 210 | Gaither Petroleum Corporation | Katy, TX 77493 | Oil & Gas Operator | May 2025 |
| 211 | Gardner Energy Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 1999 |
| 212 | Gary Oil & Gas | Deer Park, TX 77536 | Oil & Gas Operator | May 2025 |
| 213 | Gasper Rice Resources, LTD. | Houston, TX 77068 | Oil & Gas Operator | May 2025 |
| 214 | Gcows Operating LLC | Montgomery, TX 77356 | Oil Operator | May 2025 |
| 215 | General Oil Company, Inc. | Wichita, KS 67213 | Oil & Gas Operator | May 2025 |
| 216 | Global Natural Resources Corp. | Houston, TX 77002 | Oil & Gas Operator | May 1998 |
| 217 | Goldking Minerals MGMT, L.L.C. | Houston, TX 77253 | Oil & Gas Operator | May 2025 |
| 218 | Goldking Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2007 |
| 219 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 220 | Goldmark Energy Corporation | Spring, TX 77393 | Oil & Gas Operator | Jul 2010 |
| 221 | Goldston Oil Corporation | Houston, TX 77257 | Oil & Gas Operator | May 2025 |
| 222 | Goodrich Oil Company | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2001 |
| 223 | Gordy Oil Company | Houston, TX 77007 | Oil & Gas Operator | May 2025 |
| 224 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 225 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 226 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 227 | Gulf Coast Energy, Co. | Alvin, TX 77511 | Oil & Gas Operator | Apr 2021 |
| 228 | Gulf Energy Exploration Corp. | Austin, TX 78716 | Gas Operator | May 2025 |
| 229 | Gulf Tide Oil Company, The | Houston, TX 77008 | Oil & Gas Operator | Jun 1999 |
| 230 | H & M Resources LLC | Dallas, TX 75225 | Oil & Gas Operator | May 2025 |
| 231 | H-M Resource Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Feb 2023 |
| 232 | H.K.E. | Stafford, TX 77497 | Oil & Gas Operator | May 2025 |
| 233 | Haber Resources Corporation | Houston, TX 77063 | Oil & Gas Operator | Mar 1999 |
| 234 | Halbouty, Michel T. | Houston, TX 77056 | Oil & Gas Operator | Aug 1997 |
| 235 | Halex Oil Corporation | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 236 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | May 2025 |
| 237 | Hanson Minerals Co. | Houston, TX 77042 | Oil & Gas Operator | Oct 1993 |
| 238 | Hanson Production Company | Cuero, TX 77954 | Oil & Gas Operator | Jul 2009 |
| 239 | Harrison Interests, LTD. | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 240 | Hawthorne Oil And Gas Corp. | Houston, TX 77227 | Oil & Gas Operator | Sep 1993 |
| 241 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Feb 2025 |
| 242 | Hemco Development, LLC | Dallas, TX 75201 | Oil & Gas Operator | Nov 2020 |
| 243 | Hemco Production, L. L. C. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2016 |
| 244 | Heritage Operating Co., Inc. The | Stafford, TX 77497 | Oil & Gas Operator | May 1997 |
| 245 | HG Operating LLC | Plano, TX 75026 | Oil & Gas Operator | May 2025 |
| 246 | High Island Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2017 |
| 247 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | May 2025 |
| 248 | Horizon Prod. And Operating, LLC | Houston, TX 77019 | Oil & Gas Operator | May 2025 |
| 249 | Hosford Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 1994 |
| 250 | Hou-Tex, Inc. | Houston, TX 77224 | Oil & Gas Operator | Jun 2001 |
| 251 | Houston Energy Operating, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jul 2020 |
| 252 | Houston Hydrocarbons, Inc. (A) | Houston, TX 77042 | Oil & Gas Operator | Sep 2004 |
| 253 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 254 | Houston Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | May 2025 |
| 255 | Howard Exploration, Inc. | Houston, TX 77069 | Oil & Gas Operator | May 2025 |
| 256 | Howard, Douglas J. | Houston, TX 77070 | Oil & Gas Operator | Mar 2008 |
| 257 | Howell Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Oct 2015 |
| 258 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | May 2025 |
| 259 | Hughes, Dan A. Company | Beeville, TX 78104 | Oil & Gas Operator | May 2006 |
| 260 | Hughes, Dan A. Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | May 2025 |
| 261 | Hugus Investment Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | May 2025 |
| 262 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 263 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 264 | Hunters Creek Oil & Gas | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 265 | Hydrocarbon Management, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 1996 |
| 266 | Icarus Operating Corporation | Spring, TX 77393 | Oil & Gas Operator | May 2025 |
| 267 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 268 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 269 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 270 | Ipact | Austin, TX 78734 | Oil & Gas Operator | May 2025 |
| 271 | Ipr USA Corp. | Irving, TX 75039 | Oil & Gas Operator | Jun 2009 |
| 272 | J.F.S. Production Co., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 1995 |
| 273 | J.R. Oil And Gas Inc. | Alvin, TX 77511 | Oil & Gas Operator | May 2025 |
| 274 | Jay Management Company LLC | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 275 | Jetta Operating Company Inc | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 276 | Jordan Oil Company, Inc. | Lake Charles, LA 70602 | Oil & Gas Operator | Dec 2019 |
| 277 | Josey Oil Company | Houston, TX 77019 | Oil & Gas Operator | Jul 2006 |
| 278 | Josey Oil Company, LTD. | Houston, TX 77019 | Oil & Gas Operator | May 2025 |
| 279 | Josey, Lenoir M., Inc. | Houston, TX 77019 | Oil & Gas Operator | Aug 2003 |
| 280 | Joy Resources, Inc. | Houston, TX 77027 | Oil & Gas Operator | May 2025 |
| 281 | Julil Energy, LLC | Richmond, TX 77406 | Oil & Gas Operator | Dec 2024 |
| 282 | K-B Exploration Co. | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 283 | K. O. C. Corporation | Sherman, TX 75091 | Oil & Gas Operator | May 2025 |
| 284 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 285 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | May 2025 |
| 286 | Kaler Energy Corp. | Boerne, TX 78006 | Oil & Gas Operator | May 2025 |
| 287 | Kebo Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | May 2025 |
| 288 | Keene, Roy J. Jr. | Sugar Land, TX 77498 | Oil & Gas Operator | Jun 2016 |
| 289 | Kelpetro, Inc. | Houston, TX 77056 | Oil & Gas Operator | Mar 2012 |
| 290 | Kenneth W. Cory, LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2025 |
| 291 | Kerns O & G, Inc. | San Antonio, TX 78232 | Oil & Gas Operator | Dec 2004 |
| 292 | Kerr-McGee Oil & Gas Corp. | Houston, TX 77251 | Oil & Gas Operator | Sep 2006 |
| 293 | Kiawah Resources, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2017 |
| 294 | Kilmarnock Oil Company, Inc. | Corsicana, TX 75110 | Oil & Gas Operator | May 2025 |
| 295 | Kinder Morgan Tejas Pipeline LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 296 | Kingwood Exploration LLC | Shreveport, LA 71105 | Oil & Gas Operator | May 2025 |
| 297 | KP Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1997 |
| 298 | Kriti Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2012 |
| 299 | Lacy, F. B. Inc. | Houston, TX 77055 | Oil & Gas Operator | Sep 1997 |
| 300 | Lapis Operating, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jul 2015 |