| 201 | Four Rivers Exploration, Inc. | | Oil & Gas Operator | Sep 2002 |
| 202 | Franks & Petrofunds, Inc. | | Oil & Gas Operator | Sep 1989 |
| 203 | Franks - Arkla | | Oil & Gas Operator | Jun 1985 |
| 204 | Franks Petroleum Inc. | | Oil & Gas Operator | Nov 1994 |
| 205 | Franks Petroleum, Inc. Et Al | | Oil & Gas Operator | Oct 1989 |
| 206 | Fred Olsen,Inc. | | Oil & Gas Operator | Jan 1981 |
| 207 | Fredria Bertrand, SR. | | Oil Operator | May 2021 |
| 208 | Freeport Oil Company | New Orleans, LA 70112 | Oil & Gas Operator | Oct 1979 |
| 209 | Gary-Williams Production Company | Denver, CO 80202 | Oil & Gas Operator | May 2000 |
| 210 | Gde Investments La, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 211 | General American Oil Co Of TX | | Oil & Gas Operator | Jun 1983 |
| 212 | General Atlantic Energy Corp. | | Oil & Gas Operator | Nov 1988 |
| 213 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 214 | Geodyne Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 215 | George D. Hartfield Oil & Gas, Inc. | | Oil & Gas Operator | Dec 2024 |
| 216 | Germany Oil Company | Tulsa, OK 74135 | Oil & Gas Operator | Oct 2002 |
| 217 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 218 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 219 | Getty Reserve Oil Inc | White Plains, NY 10650 | Oil & Gas Operator | Mar 2005 |
| 220 | Goldking Onshore Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2016 |
| 221 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 222 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 223 | Goodrich Oil Company | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2001 |
| 224 | Gossco, Inc. | | Oil & Gas Operator | Feb 1989 |
| 225 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 226 | Graham-McCormick Oper. PRTSHP. | | Oil & Gas Operator | Aug 1989 |
| 227 | Great River Oil & Gas Corp. | | Oil & Gas Operator | Sep 1998 |
| 228 | Great Southern Oil &Gas Co Inc | | Oil & Gas Operator | Dec 2004 |
| 229 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 230 | Grigsby Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2026 |
| 231 | Gruy Management Service Co. | | Oil & Gas Operator | Apr 1982 |
| 232 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 233 | Guardian Oil Company | | Oil & Gas Operator | Aug 1985 |
| 234 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 235 | Gulf Tech Energy LLC | | Oil & Gas Operator | Dec 2002 |
| 236 | Gyb-Britlind Oil, LLC | | Oil & Gas Operator | Jun 2016 |
| 237 | H & H Production Company | Muenster, TX 76252 | Oil & Gas Operator | Oct 2005 |
| 238 | H L Brown Jr | Midland, TX 79702 | Oil & Gas Operator | May 2001 |
| 239 | H.L.Hawkins &H.L.Hawkins, Jr. | | Oil & Gas Operator | Feb 1989 |
| 240 | Habetz Oilfield Saltwater Ser, Inc | | Oil Operator | Dec 2024 |
| 241 | Hallador Petroleum Company | | Oil & Gas Operator | Feb 1992 |
| 242 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 243 | Hamilton Brothers Oil Co. | Houston, TX 77057 | Oil & Gas Operator | Mar 2015 |
| 244 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Feb 2026 |
| 245 | Hardy Oil & Gas USA Inc. | Houston, TX 77079 | Oil & Gas Operator | Jun 1996 |
| 246 | Hassie Hunt Expl. Co. | | Oil & Gas Operator | Aug 2008 |
| 247 | HCW Exploration, Inc. | | Oil & Gas Operator | Jun 1986 |
| 248 | Headington Energy Corporation | | Oil & Gas Operator | Aug 1992 |
| 249 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 250 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 251 | Headington Oil Company, L.P. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2008 |
| 252 | Hebert & Rucks L.L.C. | | Oil & Gas Operator | May 2002 |
| 253 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Nov 2025 |
| 254 | Henderson Oil & Gas | | Oil Operator | Sep 1990 |
| 255 | Henry Production Company, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Oct 2019 |
| 256 | HGH Energy, Inc. | | Oil & Gas Operator | Jun 2001 |
| 257 | Hicks Production Co. | | Oil & Gas Operator | Apr 1991 |
| 258 | Highland Resources, Inc. | | Oil & Gas Operator | Dec 2004 |
| 259 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Feb 2026 |
| 260 | Hill Production | | Oil & Gas Operator | Nov 1981 |
| 261 | Hill Production Co Inc-Wisconsin | Humble, TX 77347 | Oil & Gas Operator | Jun 1993 |
| 262 | Hilliard Oil & Gas, Inc. | New Orleans, LA 70112 | Oil & Gas Operator | May 2001 |
| 263 | Hilliard Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2009 |
| 264 | Holston-GR. Sou. Oil & Gas Co. | | Oil & Gas Operator | Mar 1981 |
| 265 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 266 | Howard'S Well Service | | Oil Operator | Jul 2007 |
| 267 | Huffco Petroleum Corporation | | Oil & Gas Operator | Jul 1988 |
| 268 | Huggs Inc & John Franks, Et Al | | Oil & Gas Operator | Dec 1992 |
| 269 | Hugh A. Hawthorne, Et Al | | Oil & Gas Operator | Dec 1978 |
| 270 | Hughes & Hughes | | Oil & Gas Operator | May 1984 |
| 271 | Hughes Denny Offshore Expl Inc | | Oil & Gas Operator | Nov 1988 |
| 272 | Hughes Eastern Petroleum, Inc. | | Oil & Gas Operator | Apr 1993 |
| 273 | Hughes Eastern Petroleum, LTD | | Oil & Gas Operator | Jun 1986 |
| 274 | Hughes-Denny Petroleum Co.,Inc | | Oil & Gas Operator | Dec 1987 |
| 275 | Hughes-Leckelt-Maybrier PRDCRS | | Oil Operator | Mar 2022 |
| 276 | Hunt Investment Corporation | | Oil & Gas Operator | Jun 1989 |
| 277 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 278 | Hy-Mark Oil & Gas, Inc. | | Oil Operator | Mar 1991 |
| 279 | Hydrocarbon MGMT., Inc. | | Oil & Gas Operator | Mar 1997 |
| 280 | Iberia Operating Corporation | | Oil & Gas Operator | Jan 2003 |
| 281 | Imc Exploration Co. | | Oil & Gas Operator | Oct 1986 |
| 282 | Imperial-American Energy,Inc. | | Oil & Gas Operator | Jul 1978 |
| 283 | Indian Exploration, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2026 |
| 284 | Indigo II Louisiana Operating LLC | | Oil & Gas Operator | Feb 2015 |
| 285 | Indigo Minerals LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 286 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 287 | Innovative Resources, Inc. | | Oil Operator | Feb 2022 |
| 288 | International Oil & Gas Corp. | | Oil & Gas Operator | Dec 1986 |
| 289 | Interstate Explorations LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2026 |
| 290 | Itr Petroleum Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 291 | J P Owen . | | Oil & Gas Operator | Mar 1989 |
| 292 | J P Van Way | | Oil & Gas Operator | Dec 2024 |
| 293 | J V A Operating Company, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2021 |
| 294 | J. Hus Hawkins | | Oil & Gas Operator | Feb 1989 |
| 295 | J. P. Van Way, SR. | | Oil Operator | Dec 1989 |
| 296 | J. S. Blanton | | Oil Operator | May 1986 |
| 297 | J.S. & S. Production, L.L.C. | | Oil Operator | Apr 2021 |
| 298 | Jack W. Grigsby | | Oil & Gas Operator | Sep 2001 |
| 299 | Jada Inc. | | Oil & Gas Operator | Jul 2013 |
| 300 | Jade Petroleum Inc. | | Oil & Gas Operator | May 1998 |