| 201 | Galloway Energy Co. | Tomball, TX 77377 | Oil & Gas Operator | Jul 2025 |
| 202 | Gardner Energy Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 1999 |
| 203 | Garrison LTD. | San Antonio, TX 78257 | Oil & Gas Operator | Jul 2025 |
| 204 | Gary Oil & Gas | Deer Park, TX 77536 | Oil & Gas Operator | Jul 2025 |
| 205 | Gcer Onshore, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2015 |
| 206 | Gei Management Co., Inc. | Houston, TX 77024 | Oil & Gas Operator | Sep 1993 |
| 207 | Gemarmi Inc. | Cypress, TX 77433 | Oil & Gas Operator | Jul 2025 |
| 208 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 209 | Genesis Producing Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2007 |
| 210 | Geo Asset Management, Inc. | Katy, TX 77493 | Oil & Gas Operator | Jul 2025 |
| 211 | Geo Engineering, Inc. | Houston, TX 77027 | Oil & Gas Operator | Jun 2009 |
| 212 | Glenn, Wayne E. & Assoc., Inc. | Dickinson, TX 77539 | Oil & Gas Operator | Jun 2005 |
| 213 | Glickenhaus Energy Corporation | Houston, TX 77027 | Oil & Gas Operator | Jul 2025 |
| 214 | Goldking Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2007 |
| 215 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 216 | Good Ol'Boys Oil Company | Houston, TX 77057 | Oil & Gas Operator | Jul 2025 |
| 217 | Goodrich Oil Company | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2001 |
| 218 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 219 | Gordy Oil Company | Houston, TX 77007 | Oil & Gas Operator | Jul 2025 |
| 220 | Gould Oil Inc. | Wichita, KS 67278 | Oil & Gas Operator | Oct 2019 |
| 221 | Graward Operating, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Jul 2025 |
| 222 | Great Western Onshore Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 223 | Greenhill Petroleum Corporation | Houston, TX 77077 | Oil & Gas Operator | Jan 1998 |
| 224 | Grimes Energy Company | Abilene, TX 79604 | Oil & Gas Operator | Mar 2005 |
| 225 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 226 | H-S Exploration | Perryton, TX 79070 | Oil & Gas Operator | Jul 2025 |
| 227 | H.E.R. Operating, LLC | Silsbee, TX 77656 | Oil & Gas Operator | Jul 2025 |
| 228 | H.K.E. | Stafford, TX 77497 | Oil & Gas Operator | Jul 2025 |
| 229 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Jul 2025 |
| 230 | Hankamer, Curtis Corporation,The | Houston, TX 77024 | Oil & Gas Operator | Jul 2025 |
| 231 | Harrison Interests, LTD. | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 232 | Hat Oil & Gas, Inc. | Slaton, TX 79364 | Oil & Gas Operator | Feb 2002 |
| 233 | Heisey Ventures, Inc. | Houston, TX 77019 | Oil & Gas Operator | Jul 2025 |
| 234 | Helis Oil & Gas Company, L.L.C. | New Orleans, LA 70130 | Oil & Gas Operator | Oct 2023 |
| 235 | Helis,WM.G.,Est., A Partnership | New Orleans, LA 70130 | Oil & Gas Operator | Aug 2003 |
| 236 | Hemco Development, LLC | Dallas, TX 75201 | Oil & Gas Operator | Nov 2020 |
| 237 | Hennig Production Co., Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jul 2025 |
| 238 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Jul 2025 |
| 239 | HNG Storage Company | Houston, TX 77042 | Oil & Gas Operator | Mar 2002 |
| 240 | Hollimon Oil Corporation | Castroville, TX 78009 | Oil & Gas Operator | Nov 2016 |
| 241 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | Jul 2025 |
| 242 | Horizon Exploration Company | Houston, TX 77019 | Oil & Gas Operator | Aug 2002 |
| 243 | Horizon Prod. And Operating, LLC | Houston, TX 77019 | Oil & Gas Operator | Jul 2025 |
| 244 | Houston Energy Operating, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jul 2020 |
| 245 | Houston Energy, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2014 |
| 246 | Houston Expl. & Prod. Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Aug 2003 |
| 247 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 248 | Houston Oil Prod Enterprises,Inc | Houston, TX 77006 | Oil & Gas Operator | Jul 2025 |
| 249 | Houston Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Jul 2025 |
| 250 | Houston Resources Corp. | Houston, TX 77002 | Oil & Gas Operator | Apr 2003 |
| 251 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Jul 2025 |
| 252 | Hughes, Dan A. Company | Beeville, TX 78104 | Oil & Gas Operator | May 2006 |
| 253 | Hunt, WM. Herbert, Trust Est. | Dallas, TX 75201 | Oil & Gas Operator | Sep 1998 |
| 254 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Jul 2025 |
| 255 | Island Exploration | Houston, TX 77058 | Oil & Gas Operator | Jul 2025 |
| 256 | J & L Partners | Dallas, TX 75370 | Oil & Gas Operator | Dec 2005 |
| 257 | J-Brex Company | Amarillo, TX 79101 | Oil & Gas Operator | Jul 2025 |
| 258 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Jul 2025 |
| 259 | J.W.S. | Talpa, TX 76882 | Oil & Gas Operator | Jul 2025 |
| 260 | Jamex II LTD., L.L.P. | Dallas, TX 75252 | Oil & Gas Operator | Sep 2002 |
| 261 | Jamex, Inc. | Lewisville, TX 75067 | Oil & Gas Operator | Jul 2025 |
| 262 | Jay Management Company LLC | Houston, TX 77057 | Oil & Gas Operator | Jul 2025 |
| 263 | Jet Oil Producers, Inc. | Coldspring, TX 77331 | Oil & Gas Operator | Jul 2025 |
| 264 | Jil Oil Corp. | San Antonio, TX 78279 | Oil & Gas Operator | Jul 2025 |
| 265 | Jones, L. E. Production Co. | Duncan, OK 73534 | Oil & Gas Operator | Jul 2014 |
| 266 | Josey Oil Company | Houston, TX 77019 | Oil & Gas Operator | Jul 2006 |
| 267 | Josey, Lenoir M., Inc. | Houston, TX 77019 | Oil & Gas Operator | Aug 2003 |
| 268 | Joy Resources, Inc. | Houston, TX 77027 | Oil & Gas Operator | Jul 2025 |
| 269 | JTL Operating Co Inc | Katy, TX 77450 | Oil & Gas Operator | Jul 2025 |
| 270 | Jurassic Energy Corporation | Crosby, TX 77532 | Oil & Gas Operator | Jul 2025 |
| 271 | K. O. C. Corporation | Sherman, TX 75091 | Oil & Gas Operator | Jul 2025 |
| 272 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Jul 2025 |
| 273 | Karenco Energy, Incorporated | Seguin, TX 78155 | Oil & Gas Operator | Oct 1997 |
| 274 | KCM Management, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2014 |
| 275 | Kerns O & G, Inc. | San Antonio, TX 78232 | Oil & Gas Operator | Dec 2004 |
| 276 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 277 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 278 | Keystone Exploration, Inc | College Sta, TX 77845 | Oil & Gas Operator | Jul 2025 |
| 279 | King Ranch Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 1997 |
| 280 | Kingwood Exploration LLC | Shreveport, LA 71105 | Oil & Gas Operator | Jul 2025 |
| 281 | Kody Petroleum Co., Inc. | Daisetta, TX 77533 | Oil & Gas Operator | Jul 2025 |
| 282 | KP Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1997 |
| 283 | Krescent Energy Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2013 |
| 284 | Lake Ronel Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Jul 2017 |
| 285 | Laron Oil Corporation | Seguin, TX 78155 | Oil & Gas Operator | Jul 1997 |
| 286 | Leonard, J. A. | Austin, TX 78734 | Oil & Gas Operator | Jul 2025 |
| 287 | Liberty Operating Company, Inc. | Lake Dallas, TX 75065 | Oil & Gas Operator | Mar 2008 |
| 288 | Lilley, C.C., Inc. | Dallardsville, TX 77332 | Oil & Gas Operator | Jul 2025 |
| 289 | Linc Gulf Coast Petroleum, Inc. | Katy, TX 77494 | Oil & Gas Operator | Jul 2025 |
| 290 | Live Oak Gas Company | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 291 | Lobo Resources, LTD. | Houston, TX 77077 | Oil & Gas Operator | Apr 1994 |
| 292 | Low-End Oil LLC | Austin, TX 78748 | Oil Operator | Jul 2025 |
| 293 | Lozano Oil Company Inc. | Houston, TX 77082 | Oil & Gas Operator | Jul 2025 |
| 294 | LTS Oil & Gas | Lubbock, TX 79424 | Oil & Gas Operator | Jul 2025 |
| 295 | M & S Exploration | El Campo, TX 77437 | Oil & Gas Operator | Jul 2025 |
| 296 | M.J.O.G., Inc. | Fort Smith, AR 72903 | Oil Operator | Mar 2015 |
| 297 | Magnum Engineering Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2025 |
| 298 | Magnum Oilfield Services LLC | Bakersfield, CA 93309 | Oil Operator | Jul 2025 |
| 299 | Magnum Producing & Operating Co. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jan 2004 |
| 300 | Magnum Producing, LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2025 |