| 201 | Lety Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2002 |
| 202 | Lif-Tex Oil Recovery, Inc. | Luling, TX 78648 | Oil Operator | Dec 2025 |
| 203 | LLT Energy, Inc. | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 204 | LMN Oil And Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Mar 2008 |
| 205 | Lodel Energy Resources Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 206 | Lottie Oil Co. | Seguin, TX 78156 | Oil & Gas Operator | Apr 1996 |
| 207 | LP Operating, LLC | Boerne, TX 78006 | Oil & Gas Operator | Dec 2025 |
| 208 | LT Oil LLC | San Marcos, TX 78666 | Oil Operator | Dec 2025 |
| 209 | Luling O&G LLC | Cibolo, TX 78108 | Oil & Gas Operator | Dec 2025 |
| 210 | Luling Well Service | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 211 | Luloc Oil Co. | Lockhart, TX 78644 | Oil & Gas Operator | Aug 2003 |
| 212 | Lutex Oil, LTD. | Luling, TX 78648 | Oil & Gas Operator | Sep 2024 |
| 213 | M & J Production Company | Austwell, TX 77950 | Oil & Gas Operator | Jun 2020 |
| 214 | M-Five Oil Company | Seguin, TX 78155 | Oil & Gas Operator | Apr 2002 |
| 215 | Main Street Royalty, Inc. | Lockhart, TX 78644 | Oil & Gas Operator | Aug 1999 |
| 216 | Manning, Jack | Odessa, TX 79760 | Oil & Gas Operator | Dec 2003 |
| 217 | Marjo Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Oct 1999 |
| 218 | Marymac Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Sep 2001 |
| 219 | Matrix Producing Company | Luling, TX 78648 | Oil & Gas Operator | Feb 2005 |
| 220 | Maverick Energy Group, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 221 | Maverick Prod. Co., Inc. | Houston, TX 77056 | Oil & Gas Operator | Dec 2025 |
| 222 | McMinn Operating Company, Inc. | Hempstead, TX 77445 | Oil & Gas Operator | Dec 2025 |
| 223 | Meb, LLC | Austin, TX 78737 | Oil Operator | Dec 2025 |
| 224 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 225 | Meridian Oil Production Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 2024 |
| 226 | Merkin LLC | Austin, TX 78737 | Oil Operator | Dec 2025 |
| 227 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 228 | Millennium Exploration Co. LLC | San Antonio, TX 78232 | Oil & Gas Operator | Dec 2025 |
| 229 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 2007 |
| 230 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 231 | Mobile Production Systems, Inc. | Austin, TX 78711 | Oil & Gas Operator | Feb 1995 |
| 232 | Mockingbird Oil, Inc. (I) | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 233 | Mosaic Oil LLC | Dallas, TX 75205 | Oil & Gas Operator | Dec 2025 |
| 234 | Multipay Energy, Inc. | Austin, TX 78749 | Oil Operator | Dec 2025 |
| 235 | Muroz International Group Inc | Houston, TX 77056 | Oil Operator | Dec 2025 |
| 236 | Nelmark Energy Corporation | San Antonio, TX 78231 | Oil & Gas Operator | Apr 2002 |
| 237 | Nelms Bros. Oil Properties Inc. | Austin, TX 78711 | Oil & Gas Operator | Jun 1996 |
| 238 | Nelson, Roy K. & Co. | Arlington, TX 76016 | Oil & Gas Operator | Jul 1995 |
| 239 | NM&O Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 240 | North American Drilling Corp | Plano, TX 75093 | Oil & Gas Operator | Dec 2025 |
| 241 | North Central Oil Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2005 |
| 242 | North South Oil, LLC | Luling, TX 78648 | Oil Operator | Dec 2025 |
| 243 | Northridge Exploration, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 244 | Northridge Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 245 | O.G.O. Refining | Luling, TX 78648 | Oil & Gas Operator | Jun 2013 |
| 246 | Oak Valley Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2015 |
| 247 | Occidental Energy Company, Inc. | Houston, TX 77282 | Oil & Gas Operator | Jul 2021 |
| 248 | Ogris Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 249 | Oilex Int'L Investments, Inc. | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 250 | Ojb, Inc. | Buda, TX 78610 | Oil & Gas Operator | Mar 2013 |
| 251 | Origin Prod Co Gonzales Prop LLC | New Braunfels, TX 78132 | Oil & Gas Operator | Dec 2025 |
| 252 | Origin Production Company, Inc. | New Braunfels, TX 78132 | Oil & Gas Operator | Dec 2025 |
| 253 | Orr Production Company | Austin, TX 78746 | Oil & Gas Operator | Dec 2000 |
| 254 | Osyka Oil & Gas, Inc. | Metairie, LA 70004 | Oil & Gas Operator | Dec 2025 |
| 255 | Outline Oil Corp. | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2025 |
| 256 | Overly Operating Co. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2013 |
| 257 | P & F Operating, LLC | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 258 | Pace Oil And Gas Company | Austin, TX 78715 | Oil & Gas Operator | Dec 2025 |
| 259 | Pantano Energy | San Antonio, TX 78258 | Oil & Gas Operator | Jul 1999 |
| 260 | Paradis Investments, L.L.C. | Bellaire, TX 77401 | Oil Operator | Jun 2020 |
| 261 | Penrod Oil Company Of Texas, Inc | Milano, TX 76556 | Oil & Gas Operator | Dec 2025 |
| 262 | Perlman,I.H.Oil & Gas Properties | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 263 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Dec 2025 |
| 264 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 265 | Petroleum Recovery Systems, L.C. | Houston, TX 77024 | Oil Operator | Dec 2025 |
| 266 | Petrosaurus, Inc. | Somerset, TX 78069 | Oil Operator | Dec 2025 |
| 267 | Pickett Oil Co. | Gonzales, TX 78629 | Oil & Gas Operator | Oct 2019 |
| 268 | Pitchfork Oil & Gas, Inc. | Orchard, TX 77464 | Oil & Gas Operator | Dec 2025 |
| 269 | Pre Oil Company | Seguin, TX 78155 | Oil & Gas Operator | Aug 1993 |
| 270 | Priority Oil Company LLC | Luling, TX 78648 | Oil Operator | Dec 2025 |
| 271 | Proex Energy Management, L.L.C. | Spring, TX 77386 | Oil & Gas Operator | Dec 2025 |
| 272 | Proline Energy Resources Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Dec 2025 |
| 273 | Pronto Services | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2025 |
| 274 | QQD Energy, LLC | Houston, TX 77077 | Oil Operator | Dec 2025 |
| 275 | Quest Emg, Inc. | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 276 | Quest Research & Dev. Corp. | Weatherford, TX 76086 | Oil & Gas Operator | Dec 2025 |
| 277 | Quisto Energy Corp. | Kerrville, TX 78029 | Oil & Gas Operator | Jan 1998 |
| 278 | R & S Energy Company | Luling, TX 78648 | Oil & Gas Operator | Dec 2010 |
| 279 | R & S Oil Production Co. | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 280 | R&R Resources Corporation | Houston, TX 77056 | Oil & Gas Operator | Dec 2015 |
| 281 | R. B. Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Nov 1996 |
| 282 | Ramrod Oil And Gas (U.S.A.) Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Dec 2025 |
| 283 | Rayalto Oil & Gas, Inc. | MC Queeney, TX 78123 | Oil & Gas Operator | Mar 2004 |
| 284 | RBR Operating, Inc. | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 285 | Red Shell Inc | Dale, TX 78616 | Oil & Gas Operator | Dec 2025 |
| 286 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 287 | Reliance Oil And Gas, Inc. | Austin, TX 78748 | Oil Operator | Jun 2012 |
| 288 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Dec 2025 |
| 289 | Resource Expl & Prod, Inc. | Salado, TX 76571 | Oil & Gas Operator | Dec 2025 |
| 290 | Ridgeway Exco, Inc. | San Antonio, TX 78279 | Oil & Gas Operator | Mar 1996 |
| 291 | Rio Bravo Oil Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2002 |
| 292 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2025 |
| 293 | Rockland Oil Company | Addison, TX 75001 | Oil & Gas Operator | Oct 2025 |
| 294 | Rodenberg, Laura Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 295 | Rodessa Operating Company | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Dec 2025 |
| 296 | Rollert Co., Inc., The | Luling, TX 78648 | Oil & Gas Operator | Nov 2000 |
| 297 | Rosenthal, Stanley H. | Bay City, TX 77404 | Oil & Gas Operator | Dec 2020 |
| 298 | Royal Texas Petroleum | Lago VIsta, TX 78645 | Oil & Gas Operator | Dec 2025 |
| 299 | Ruth Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Feb 2010 |
| 300 | San Antonio Gas & Oil, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2000 |