| 201 | Finger Oil & Gas, Inc. | Castroville, TX 78009 | Oil & Gas Operator | May 2021 |
| 202 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Dec 2025 |
| 203 | First Rock, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2025 |
| 204 | Firstrike Energy Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Jan 2025 |
| 205 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Dec 2025 |
| 206 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Dec 2025 |
| 207 | Fourth Floor Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Dec 2025 |
| 208 | Franklin, J.W. Oil Operator | | Oil & Gas Operator | Nov 2001 |
| 209 | Fredonia Resources Inc. | Longview, TX 75606 | Oil & Gas Operator | Aug 2003 |
| 210 | Frio Exploration Company | Pearland, TX 77588 | Oil & Gas Operator | Dec 2000 |
| 211 | Furie Operating, LLC | League City, TX 77573 | Oil & Gas Operator | Nov 2015 |
| 212 | Garcia, A. H. | San Diego, TX 78384 | Oil & Gas Operator | May 2006 |
| 213 | GBF Operating LLC | Morrison, CO 80465 | Oil & Gas Operator | Dec 2025 |
| 214 | Geodominion Petroleum | Corpus Chrsti, TX 78403 | Oil & Gas Operator | May 2012 |
| 215 | Gierhart Exploration, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Apr 1994 |
| 216 | Gillring Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 1994 |
| 217 | Ginco Operating Co. | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2025 |
| 218 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 219 | Goldston Oil Corporation | Houston, TX 77257 | Oil & Gas Operator | Dec 2025 |
| 220 | Gonzalez, Elia G. Mineral Trust | Laredo, TX 78041 | Oil & Gas Operator | May 2012 |
| 221 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 222 | GTG Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | Dec 2025 |
| 223 | Gulfstar Properties, Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Dec 2025 |
| 224 | Gulftex Energy II, LP | San Antonio, TX 78258 | Oil & Gas Operator | Jan 2013 |
| 225 | Gulftex Energy III, LP | San Antonio, TX 78257 | Oil & Gas Operator | Jul 2018 |
| 226 | Gulftex Energy, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Dec 2025 |
| 227 | H & M Resources, LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2025 |
| 228 | H-M Resource Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Feb 2023 |
| 229 | H. & J. Drilling Company | Fort Worth, TX 76114 | Oil & Gas Operator | Aug 2003 |
| 230 | Hamilton, John M. | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2001 |
| 231 | Hamilton-Tedford Oper. Co., LLC | Wichita Falls, TX 76301 | Oil Operator | May 2007 |
| 232 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Dec 2025 |
| 233 | Hanson Minerals Co. | Houston, TX 77042 | Oil & Gas Operator | Oct 1993 |
| 234 | Hanson Production Company | Cuero, TX 77954 | Oil & Gas Operator | Jul 2009 |
| 235 | Harmony Drilling Company, Inc. | Denver, CO 80222 | Oil & Gas Operator | Nov 2016 |
| 236 | Harper Hefte, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Dec 2025 |
| 237 | Harrison Interests, LTD. | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 238 | Hawn Brothers | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2003 |
| 239 | Hawn Brothers Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jan 2003 |
| 240 | Hawthorn Energy Partners, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2025 |
| 241 | Hedrick Production Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Dec 2025 |
| 242 | Heritage Operating Co., Inc. The | Stafford, TX 77497 | Oil & Gas Operator | May 1997 |
| 243 | Herv Oil, LLC | Oklahoma City, OK 73116 | Oil Operator | Sep 2025 |
| 244 | High Sierra Operating, LTD. | Canyon Lake, TX 78133 | Oil & Gas Operator | Mar 2008 |
| 245 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Dec 2025 |
| 246 | Hill Production Company No. 2 | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 247 | Holden-Brooke Oil & Gas Co. | George West, TX 78022 | Oil & Gas Operator | Sep 2005 |
| 248 | Hollimon Oil Corporation | Castroville, TX 78009 | Oil & Gas Operator | Nov 2016 |
| 249 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | Dec 2025 |
| 250 | Houston Gulf Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2025 |
| 251 | Howard, Douglas J. | Houston, TX 77070 | Oil & Gas Operator | Mar 2008 |
| 252 | Hughes, Dan A. Company | Beeville, TX 78104 | Oil & Gas Operator | May 2006 |
| 253 | Hughes, Dan A. Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | Dec 2025 |
| 254 | Hugoton Operating Company, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 255 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 256 | Hunter Petroleum Inc. | Alice, TX 78333 | Oil & Gas Operator | May 2014 |
| 257 | Hurd Enterprises, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2025 |
| 258 | Hydrocarbon Management, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 1996 |
| 259 | Hyquest Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2015 |
| 260 | Indian Oil LTD. | Whitsett, TX 78075 | Oil & Gas Operator | Dec 2025 |
| 261 | Ineos USA Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 262 | Inland Ocean, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2025 |
| 263 | J G Oil & Gas | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 264 | J W Oil Co. | Cisco, TX 76437 | Oil & Gas Operator | Dec 2025 |
| 265 | J&J Oil | La Vernia, TX 78121 | Oil & Gas Operator | Dec 2025 |
| 266 | J-Bar Oil Company | Somerset, TX 78069 | Oil & Gas Operator | Nov 2011 |
| 267 | Jaco, Troy Inc. | Sherman, TX 75091 | Oil & Gas Operator | Dec 2025 |
| 268 | Jamex, Inc. | Lewisville, TX 75067 | Oil & Gas Operator | Dec 2025 |
| 269 | Janex Oil Co., Inc. | Dallas, TX 75219 | Oil & Gas Operator | Jun 2005 |
| 270 | Janssen, Wayne Allen | Runge, TX 78151 | Oil & Gas Operator | May 2010 |
| 271 | Javelin Energy Partners Management, LLC | Irving, TX 75038 | Oil & Gas Operator | Dec 2025 |
| 272 | Jay-Dee Operating Company | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Aug 2000 |
| 273 | Jennings Exploration Company | Beeville, TX 78102 | Oil & Gas Operator | Feb 2024 |
| 274 | Joe Kestner, L.L.C. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Feb 2016 |
| 275 | Jones, Edwin M. Oil Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 276 | Jura Energy Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 277 | Kaler Energy Corp. | Boerne, TX 78006 | Oil & Gas Operator | Dec 2025 |
| 278 | Kebo Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Dec 2025 |
| 279 | Kelley Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 280 | Kelpetro, Inc. | Houston, TX 77056 | Oil & Gas Operator | Mar 2012 |
| 281 | Kem Energy, Inc. | Katy, TX 77450 | Oil & Gas Operator | Dec 2025 |
| 282 | Kenne Exploration, Inc. | Missouri City, TX 77489 | Oil & Gas Operator | Dec 2025 |
| 283 | Kimbell Oil Company Of Texas | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2025 |
| 284 | Kimbell Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 285 | Kimmeridge Texas Gas, LLC | Houston, TX 77024 | Oil & Gas Operator | Jul 2025 |
| 286 | L.T.D. Explorations Inc. | Alice, TX 78333 | Oil & Gas Operator | Dec 2025 |
| 287 | La Ronya Oil & Gas | George West, TX 78022 | Gas Operator | Dec 2025 |
| 288 | Lagerquist, Walter G., Jr. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2005 |
| 289 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 290 | Layline Energy I LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2019 |
| 291 | Layline Petroleum I, LLC | Houston, TX 77024 | Oil & Gas Operator | May 2013 |
| 292 | Lightning Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2025 |
| 293 | Lindholm Oil, Inc. | Mathis, TX 78368 | Gas Operator | Sep 2002 |
| 294 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 295 | Liquid Petroleum Resources, Inc. | Amarillo, TX 79120 | Gas Operator | Dec 2025 |
| 296 | Llewellin Operating Company, LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2017 |
| 297 | Locin Oil Corporation | Katy, TX 77494 | Oil & Gas Operator | Dec 2025 |
| 298 | Loma Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2014 |
| 299 | Lomak Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1998 |
| 300 | Los Hijos De Sanchez J LLC | Beeville, TX 78102 | Oil Operator | Dec 2025 |