| 201 | G. R. Goodwill | | Oil & Gas Operator | Jun 1997 |
| 202 | Gasco Inc | | Oil & Gas Operator | Jun 1998 |
| 203 | Geo Co., Inc. | Austin, TX 78745 | Oil Operator | Apr 1988 |
| 204 | George R Schurman | | Oil & Gas Operator | Oct 2015 |
| 205 | Gep Haynesville II, LLC | | Gas Operator | Dec 2024 |
| 206 | Gep Haynesville, LLC | | Gas Operator | Dec 2021 |
| 207 | Gerald C. Eddy | | Oil & Gas Operator | Oct 1987 |
| 208 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 209 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 210 | Gilliam Petroleum, LTD | | Oil & Gas Operator | Mar 2013 |
| 211 | Glenda Petroleum Corp. | | Gas Operator | Oct 1991 |
| 212 | Goldrus Producing Company | Houston, TX 77064 | Oil & Gas Operator | Aug 2009 |
| 213 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 214 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 215 | GPM, Inc. | | Oil & Gas Operator | Jun 1994 |
| 216 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 217 | Greenbrier Oper. Co. | Dallas, TX 75229 | Oil & Gas Operator | Feb 2001 |
| 218 | Greer Energy, Inc. | | Oil Operator | Dec 1996 |
| 219 | Grigsby Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 220 | Grogan Field Production, L.L.C. | | Oil Operator | Jan 2025 |
| 221 | Grynberg Petroleum Company | Greenwood Vge, CO 80111-3326 | Oil & Gas Operator | Oct 2019 |
| 222 | Guernsey Petroleum Corporation | Atlanta, GA 30318 | Oil & Gas Operator | Nov 1997 |
| 223 | H & B Well Service, Inc. | | Oil & Gas Operator | Aug 1993 |
| 224 | H. B. McCullough | | Oil Operator | Oct 2004 |
| 225 | H. E. Sutton | | Oil & Gas Operator | Jan 1990 |
| 226 | H. J. Bonner | | Oil & Gas Operator | Aug 1991 |
| 227 | H.E. Sutton, Et Al | | Oil & Gas Operator | Jan 1990 |
| 228 | Hall Engineering, Inc. | | Oil & Gas Operator | Jan 2007 |
| 229 | Hallmark Oil And Gas Co., Inc. | | Oil & Gas Operator | Dec 2024 |
| 230 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 231 | Hardey Co., The | Shreveport, LA 71107 | Oil & Gas Operator | Oct 2025 |
| 232 | Harleton Oil & Gas Inc. | Tyler, TX 75710 | Oil & Gas Operator | Oct 2025 |
| 233 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 234 | Heritage Energy Company | | Oil & Gas Operator | Jun 2001 |
| 235 | Herlin Et Al | | Oil & Gas Operator | Mar 1985 |
| 236 | High-Hope Oil And Gas, Inc | | Oil & Gas Operator | Mar 2017 |
| 237 | Highlands Operating Co., Inc. | | Oil & Gas Operator | May 1990 |
| 238 | Hilburn Ind., Inc. | | Oil Operator | Jan 1978 |
| 239 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Oct 2025 |
| 240 | Hilliard Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2009 |
| 241 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 242 | Hughes, Wise & Assoc., Inc | | Oil Operator | Jul 1987 |
| 243 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 244 | Hurley Oil And Gas Company | | Oil & Gas Operator | Jan 1997 |
| 245 | Hurley Petroleum Corporation | Baton Rouge, LA 70821 | Oil & Gas Operator | Feb 2000 |
| 246 | Indigo Haynesville LLC | | Gas Operator | Feb 2018 |
| 247 | Indigo Minerals LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 248 | Indigo Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2019 |
| 249 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 250 | Inland Operating Company | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 251 | J D S Oil And Gas | | Oil & Gas Operator | Jan 2025 |
| 252 | J L Shoalmire Operating Co Inc | | Oil & Gas Operator | Oct 2013 |
| 253 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Oct 2025 |
| 254 | J-W Gathering Company | | Oil Operator | Jun 2016 |
| 255 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Oct 2025 |
| 256 | J. D. Kemp | | Oil Operator | Aug 1994 |
| 257 | J. L. Shoalmire | | Oil & Gas Operator | Dec 2006 |
| 258 | J.L.H. Enterprises, Inc. | | Oil & Gas Operator | Mar 1989 |
| 259 | Jack W. Grigsby | | Oil & Gas Operator | Sep 2001 |
| 260 | Jag Operating, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2019 |
| 261 | James L Barber | | Oil Operator | Aug 1996 |
| 262 | Jeems Bayou Production Corp. | Oil City, LA 71061 | Oil & Gas Operator | Oct 2025 |
| 263 | Jeff M. Hicks | | Oil & Gas Operator | May 1992 |
| 264 | Jerry R. Craig | | Oil & Gas Operator | Dec 2012 |
| 265 | Jetta Operating Company Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 266 | Jim Joel Elliott | | Oil Operator | Nov 1999 |
| 267 | Jim-Co Drilling Et Al | | Oil & Gas Operator | Mar 1991 |
| 268 | JLM Sartor Inc | | Oil & Gas Operator | Jul 2016 |
| 269 | John C. Bowers | | Oil & Gas Operator | Dec 1987 |
| 270 | John L. Copeland | | Oil & Gas Operator | Jun 1982 |
| 271 | John T. Martin, Jr. | | Oil Operator | Jun 1992 |
| 272 | John W. Thomas | | Oil & Gas Operator | Jun 1993 |
| 273 | Johnson & Johnson Operating, Inc. | | Oil & Gas Operator | Jan 2025 |
| 274 | Jones-O'Brien, Inc. | | Oil & Gas Operator | Feb 1982 |
| 275 | JPM Petroleum, Inc. | | Oil Operator | May 1986 |
| 276 | Justiss Oil Company, Inc. | Jena, LA 71342 | Oil & Gas Operator | Jun 2025 |
| 277 | K & S Rentals | | Oil & Gas Operator | May 2013 |
| 278 | Kalda Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1994 |
| 279 | Kanpetro, Inc. | | Oil Operator | May 1991 |
| 280 | KCS Resources LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 281 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 282 | Kelley Oil & Sugar Creek Prod. | | Oil & Gas Operator | Oct 1992 |
| 283 | Kelley Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 284 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | May 2025 |
| 285 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jun 2025 |
| 286 | Kisatchie Resources, LTD. | | Gas Operator | Jul 1991 |
| 287 | L And C Oil Company | | Oil Operator | Aug 1996 |
| 288 | L'Oil Operating And MGMT. Co. | | Oil & Gas Operator | Dec 2008 |
| 289 | La Intrastate Gas Co LLC | | Oil Operator | Apr 2004 |
| 290 | Lamar Hunt Trust Est Etal | | Oil & Gas Operator | Aug 1996 |
| 291 | Largo Oil Company | Longview, TX 75606 | Oil & Gas Operator | Oct 2025 |
| 292 | Laser Gas Company I, LLC | | Oil Operator | Aug 2007 |
| 293 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 294 | Latham & Bonner | | Oil Operator | Aug 1987 |
| 295 | Latham, Bonner & Hall | | Oil Operator | Mar 1988 |
| 296 | Layton Energy Inc. | Houston, TX 77027 | Oil & Gas Operator | Oct 2025 |
| 297 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 298 | Lightning Productions, Inc. | | Oil & Gas Operator | Mar 1990 |
| 299 | Lindenmuth & Associates | | Oil & Gas Operator | Aug 2001 |
| 300 | Live Oak Petroleum, Inc. | Dallas, TX 75251 | Gas Operator | Mar 2001 |