| 201 | Exco Production Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Dec 2009 |
| 202 | Exco/Hgi JV Assets, LLC | Dallas, TX 75251 | Oil & Gas Operator | Jun 2014 |
| 203 | Executive Production, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Jul 2025 |
| 204 | Explo Oil, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 205 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 206 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Jul 2025 |
| 207 | Fair Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Dec 2000 |
| 208 | Fair Oil, LC | Tyler, TX 75710 | Oil & Gas Operator | Oct 2001 |
| 209 | Fair Oil, LTD. | Tyler, TX 75710 | Oil & Gas Operator | Jul 2025 |
| 210 | Faith Energy Exploration, Inc. | Ennis, TX 75119 | Oil & Gas Operator | Mar 2019 |
| 211 | Falco S & D, Inc. | Shreveport, LA 71107 | Oil & Gas Operator | Apr 1998 |
| 212 | Faulconer Energy, LLC | Tyler, TX 75711 | Oil & Gas Operator | Jul 2025 |
| 213 | Faulconer Vernon E Inc | Tyler, TX 75711 | Oil & Gas Operator | May 2025 |
| 214 | Fields, Bert, Jr. | Dallas, TX 75230 | Oil & Gas Operator | Apr 2015 |
| 215 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 216 | First Texas Exploration Corp. | Arcadia, LA 71001 | Oil & Gas Operator | Aug 2003 |
| 217 | Fite Oil & Gas, Inc. | Shreveport, LA 71163 | Oil & Gas Operator | Jul 2025 |
| 218 | Flat Creek Operating Co. | Rockwall, TX 75087 | Oil & Gas Operator | Jun 2004 |
| 219 | Forbes, C. C. Company | Alice, TX 78333 | Oil & Gas Operator | Sep 2015 |
| 220 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 221 | Forrester Oil & Gas Co. | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 222 | Forrester, J. L. | Longview, TX 75606 | Oil & Gas Operator | Jul 2025 |
| 223 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2025 |
| 224 | Four Diamond Operating, LLC | Kilgore, TX 75662 | Oil Operator | Jul 2025 |
| 225 | Four-S Oil Co., LTD. | Kilgore, TX 75663 | Oil Operator | Apr 2007 |
| 226 | Fox Oil And Gas Inc | Houston, TX 77002 | Gas Operator | Dec 2002 |
| 227 | Frisco Energy, L.L.C. | Tulsa, OK 74105 | Oil & Gas Operator | May 2025 |
| 228 | Ful-Hill Oil & Gas, Inc. | Marshall, TX 75670 | Oil & Gas Operator | Aug 2003 |
| 229 | Gardner Energy Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 1999 |
| 230 | Garrison Operating, L.L.C. | Tomball, TX 77375 | Oil & Gas Operator | Jul 2025 |
| 231 | Gei Management Co., Inc. | Houston, TX 77024 | Oil & Gas Operator | Sep 1993 |
| 232 | Gemini Exploration Inc | Oklahoma City, OK 73159 | Oil & Gas Operator | May 2013 |
| 233 | GMX Resources, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2014 |
| 234 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 235 | Goodrich Oil Company | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2001 |
| 236 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 237 | Goodwill, G. R. | Shreveport, LA 71107 | Oil & Gas Operator | Jul 2025 |
| 238 | Graward Operating, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Jul 2025 |
| 239 | Graystone Energy Corporation | Judson, TX 75660 | Oil & Gas Operator | Jul 2025 |
| 240 | Great Northern Energy, Inc | Irving, TX 75039 | Oil & Gas Operator | Jul 2025 |
| 241 | GTG Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | Jul 2025 |
| 242 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 243 | Haddad Boynton, LLC | Jonesville, TX 75659 | Oil Operator | Jul 2025 |
| 244 | Halcon Resources Operating, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2013 |
| 245 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 2025 |
| 246 | Hanna Oil And Gas Company | Fort Smith, AR 72901 | Oil & Gas Operator | Apr 2025 |
| 247 | Hardey Co., The | Shreveport, LA 71107 | Oil & Gas Operator | Jul 2025 |
| 248 | Harleton Oil & Gas Inc. | Tyler, TX 75710 | Oil & Gas Operator | Jul 2025 |
| 249 | Harman Operating Company, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2007 |
| 250 | Hawkeye Drilling Co. | Waskom, TX 75692 | Oil & Gas Operator | Feb 2023 |
| 251 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 252 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 253 | Hec Petroleum, Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2006 |
| 254 | Herbst Resources, Inc. | Mandeville, LA 70448 | Oil & Gas Operator | Aug 2003 |
| 255 | Heritage Operating Co., Inc. The | Stafford, TX 77497 | Oil & Gas Operator | May 1997 |
| 256 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 257 | Hibbard Energy, LP | Whitehouse, TX 75791 | Oil & Gas Operator | Jul 2025 |
| 258 | Higher Standard Oil Company,Inc. | Frisco, TX 75034 | Oil Operator | Jul 2025 |
| 259 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Jul 2025 |
| 260 | Hilliard Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2009 |
| 261 | Hinton Production Company | MT Pleasant, TX 75455 | Oil & Gas Operator | Aug 1995 |
| 262 | Hollandsworth & Travis | Longview, TX 75606 | Oil & Gas Operator | Mar 2001 |
| 263 | Hopewell Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2025 |
| 264 | Hopkins Engineering, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 1996 |
| 265 | Houston Exploration Co, The | Houston, TX 77002 | Oil & Gas Operator | Apr 2017 |
| 266 | Howell & Sandlin, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Jan 2001 |
| 267 | Howell Oil & Gas, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Oct 2019 |
| 268 | HPC Operating, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Mar 2008 |
| 269 | HRB Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Jul 2025 |
| 270 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Jul 2025 |
| 271 | Huggs Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2003 |
| 272 | Hughes Supplies, Inc. | Greenwood, LA 71033 | Oil & Gas Operator | Jul 2019 |
| 273 | Hughey, W. R., Operating Co. | Tyler, TX 75711 | Oil & Gas Operator | Feb 2005 |
| 274 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 275 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 276 | Hurley Petroleum Corporation | Baton Rouge, LA 70821 | Oil & Gas Operator | Feb 2000 |
| 277 | Hydrocarbon Lease Management LTD | Addison, TX 75001 | Oil & Gas Operator | Jul 2002 |
| 278 | Imagery Exploration, Inc. | Dallas, TX 75380 | Oil & Gas Operator | Jul 2025 |
| 279 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 280 | Indigo Minerals LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 281 | Indigo Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2019 |
| 282 | Inland Oil And Gas | Nacogdoches, TX 75961 | Oil & Gas Operator | Dec 1997 |
| 283 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Jul 2025 |
| 284 | Ironwood Oil & Gas LLC | Houston, TX 77067 | Oil & Gas Operator | Jun 2014 |
| 285 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Jul 2025 |
| 286 | Jamex, Inc. | Lewisville, TX 75067 | Oil & Gas Operator | Jul 2025 |
| 287 | Jandar Exploration, L. C. | Tyler, TX 75703 | Oil & Gas Operator | Jul 2025 |
| 288 | Janex Oil Co., Inc. | Dallas, TX 75219 | Oil & Gas Operator | Jun 2005 |
| 289 | Jeems Bayou Production Corp. | Oil City, LA 71061 | Oil & Gas Operator | Jul 2025 |
| 290 | Jess Energy Company | Tyler, TX 75710 | Oil & Gas Operator | Sep 1997 |
| 291 | Jet Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2002 |
| 292 | JHS Oilfield Services LLC | Dallas, TX 75206 | Oil Operator | Jul 2025 |
| 293 | Jones, Carl W. Operator | Shreveport, LA 71106 | Oil & Gas Operator | Jul 1999 |
| 294 | Justiss Oil Company, Inc. | Jena, LA 71342 | Oil & Gas Operator | Mar 2025 |
| 295 | Jwimco, L.L.C. | Dallas, TX 75229 | Oil & Gas Operator | May 2025 |
| 296 | Kabco Oil & Gas Company | Longview, TX 75604 | Oil & Gas Operator | Jun 2018 |
| 297 | Kelley Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 298 | Kem Energy, Inc. | Katy, TX 77450 | Oil & Gas Operator | Jul 2025 |
| 299 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2025 |
| 300 | Keyway Oil & Gas Operating LLC | Kilgore, TX 75663 | Oil Operator | Oct 2020 |