| 201 | Rollert Co., Inc., The | Luling, TX 78648 | Oil & Gas Operator | Nov 2000 |
| 202 | Roskydal, Laverne | La Vernia, TX 78121 | Oil Operator | Apr 2024 |
| 203 | RPM Operating Company | New Braunfels, TX 78131 | Oil & Gas Operator | Mar 2008 |
| 204 | RR Ventures Limited Partnership | San Antonio, TX 78239 | Oil & Gas Operator | Apr 2024 |
| 205 | Runion Oil, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Aug 2003 |
| 206 | Saur, Jerry | Luling, TX 78648 | Oil & Gas Operator | Dec 2015 |
| 207 | Schievelbein, Bryan O. | Seguin, TX 78155 | Oil & Gas Operator | Apr 2024 |
| 208 | Scully And Smith Oil Corporation | Salado, TX 76571 | Oil & Gas Operator | Feb 1995 |
| 209 | Seaco Production | Dripping SPGS, TX 78620 | Oil & Gas Operator | Feb 2016 |
| 210 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2024 |
| 211 | Seay Oil & Gas, LTD. | Dripping SPGS, TX 78620 | Oil & Gas Operator | Apr 2013 |
| 212 | Seguin Pump | Seguin, TX 78155 | Oil & Gas Operator | Sep 2017 |
| 213 | Sellers Lease Service, Inc. | Flatonia, TX 78941 | Oil & Gas Operator | Apr 2024 |
| 214 | Serra Energy, Inc. | Hailey, ID 83333 | Oil & Gas Operator | May 2011 |
| 215 | Shefts & Shefts, Inc. | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 216 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Jan 2024 |
| 217 | Short Oil Co | Luling, TX 78648 | Oil & Gas Operator | Jan 2024 |
| 218 | SHWJ Oil & Gas Co., Inc. | Oil City, LA 71061 | Oil Operator | Apr 2024 |
| 219 | Signal Oil And Gas Company | Colleyville, TX 76034 | Oil & Gas Operator | Apr 2024 |
| 220 | Sinclair Energy Corporation | Fort Worth, TX 76177 | Oil & Gas Operator | Apr 2024 |
| 221 | Source Petroleum Inc. | San Antonio, TX 78265 | Oil & Gas Operator | Apr 2024 |
| 222 | Southern Royalty Inc. | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Feb 1997 |
| 223 | Spencer-Cloughly Investments Inc | San Marcos, TX 78666 | Oil & Gas Operator | Aug 2002 |
| 224 | Spiller, H. G. | San Antonio, TX 78213 | Oil & Gas Operator | Oct 1993 |
| 225 | Spiller, J.A. | Austin, TX 78735 | Oil & Gas Operator | Jan 2016 |
| 226 | Spiller, Joseph A. | Austin, TX 78746 | Oil & Gas Operator | Oct 1993 |
| 227 | Sue-Ann Production Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 228 | Taber, Alan R. | La Vernia, TX 78121 | Oil Operator | Apr 2024 |
| 229 | Tanglehead Operating, LLC | San Antonio, TX 78209 | Oil Operator | Apr 2024 |
| 230 | Tanglewood Oil & Gas Co. | Gouldbusk, TX 76845 | Oil & Gas Operator | Apr 2024 |
| 231 | Tejones Operating Corporation | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 232 | Tenison Oil Company | Abilene, TX 79605 | Oil & Gas Operator | Apr 2024 |
| 233 | Terra Locus Services | Seguin, TX 78155 | Oil & Gas Operator | Jun 2000 |
| 234 | Texas Coastal Resources LLC | Fairhope, AL 36532 | Oil Operator | Apr 2024 |
| 235 | Texas Petroleum Investment Company | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 236 | Texas Secondary Oil Corporation | Devine, TX 78016 | Oil & Gas Operator | Apr 2024 |
| 237 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 238 | Texokan Operating, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2024 |
| 239 | Texstar Oil & Gas, LLC | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 240 | Thomas Oil & Gas Company | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 241 | Thrall Operating Company, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Apr 2024 |
| 242 | Three J Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Apr 2024 |
| 243 | Tri-County Operating Company | Seguin, TX 78156 | Gas Operator | Feb 1997 |
| 244 | Tri-W Oil | Luling, TX 78648 | Oil Operator | Apr 2024 |
| 245 | Tri-W Oil, Inc. | Luling, TX 78648 | Oil Operator | Apr 2007 |
| 246 | Truth Resources LP | Conroe, TX 77304 | Oil Operator | Sep 2021 |
| 247 | U.S. Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 248 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 249 | United Oil & Minerals, Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2001 |
| 250 | Upland Operating, LLC | Dallas, TX 75226 | Oil & Gas Operator | Apr 2024 |
| 251 | Uvalde Energy Co. | Austin, TX 78747 | Oil & Gas Operator | Nov 1994 |
| 252 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Jan 2024 |
| 253 | Vintage Petroleum, LLC | Houston, TX 77210 | Oil & Gas Operator | Dec 2023 |
| 254 | W.W. Energy | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 255 | Wehunt Oil Company, Inc. | Dallas, TX 75376 | Oil & Gas Operator | Nov 2002 |
| 256 | Wilson, Billy R. | New Braunfels, TX 78130 | Oil & Gas Operator | Apr 2024 |
| 257 | Windmill Oil Company | Austin, TX 78747 | Oil & Gas Operator | Mar 2008 |
| 258 | X Stone Energy LLC. | Plano, TX 75093 | Oil & Gas Operator | Apr 2024 |
| 259 | Xenon Energy, Inc. | Plano, TX 75074 | Oil & Gas Operator | Aug 2003 |
| 260 | York E & P, LLC | Boling, TX 77420 | Oil & Gas Operator | Apr 2024 |
| 261 | Zaf Oil | San Antonio, TX 78230 | Oil & Gas Operator | Aug 2002 |