| 201 | Rainer Energy, Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Dec 2025 |
| 202 | Rampage Exploration, Inc. | Austin, TX 78737 | Oil & Gas Operator | Dec 2025 |
| 203 | Rayalto Oil & Gas, Inc. | MC Queeney, TX 78123 | Oil & Gas Operator | Mar 2004 |
| 204 | RBR Operating, Inc. | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 205 | Rec Well Service, Inc. | Pleasanton, TX 78064 | Oil & Gas Operator | Jul 2008 |
| 206 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 207 | Reliance Oil And Gas, Inc. | Austin, TX 78748 | Oil Operator | Jun 2012 |
| 208 | Reneau, James Seed Co. | Shamrock, TX 79079 | Oil & Gas Operator | Dec 2025 |
| 209 | Richman Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2006 |
| 210 | Robbins, L. C. | Seguin, TX 78155 | Oil & Gas Operator | Aug 2003 |
| 211 | Rollert Co., Inc., The | Luling, TX 78648 | Oil & Gas Operator | Nov 2000 |
| 212 | Roskydal, Laverne | La Vernia, TX 78121 | Oil Operator | Dec 2025 |
| 213 | RPM Operating Company | New Braunfels, TX 78131 | Oil & Gas Operator | Mar 2008 |
| 214 | RR Ventures Limited Partnership | San Antonio, TX 78239 | Oil & Gas Operator | Dec 2025 |
| 215 | Runion Oil, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Aug 2003 |
| 216 | Saur, Jerry | Luling, TX 78648 | Oil & Gas Operator | Dec 2015 |
| 217 | Schievelbein, Bryan O. | Seguin, TX 78155 | Oil & Gas Operator | Dec 2025 |
| 218 | Scully And Smith Oil Corporation | Salado, TX 76571 | Oil & Gas Operator | Feb 1995 |
| 219 | Seaco Production | Dripping SPGS, TX 78620 | Oil & Gas Operator | Feb 2016 |
| 220 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 221 | Seay Oil & Gas, LTD. | Dripping SPGS, TX 78620 | Oil & Gas Operator | Apr 2013 |
| 222 | Seguin Pump | Seguin, TX 78155 | Oil & Gas Operator | Sep 2017 |
| 223 | Sellers Lease Service, Inc. | Flatonia, TX 78941 | Oil & Gas Operator | Dec 2025 |
| 224 | Serra Energy, Inc. | Hailey, ID 83333 | Oil & Gas Operator | May 2011 |
| 225 | Shefts & Shefts, Inc. | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 226 | Short Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Oct 2025 |
| 227 | SHWJ Oil & Gas Co., Inc. | Oil City, LA 71061 | Oil Operator | Dec 2025 |
| 228 | Signal Oil And Gas Company | Colleyville, TX 76034 | Oil & Gas Operator | Dec 2025 |
| 229 | Sinclair Energy Corporation | Fort Worth, TX 76177 | Oil & Gas Operator | Dec 2025 |
| 230 | Solutions Projects And Consulting, LLC | Houston, TX 77070 | Oil Operator | Dec 2025 |
| 231 | Source Petroleum Inc. | San Antonio, TX 78265 | Oil & Gas Operator | Dec 2025 |
| 232 | Southern Royalty Inc. | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Feb 1997 |
| 233 | Spencer-Cloughly Investments Inc | San Marcos, TX 78666 | Oil & Gas Operator | Aug 2002 |
| 234 | Spiller, H. G. | San Antonio, TX 78213 | Oil & Gas Operator | Oct 1993 |
| 235 | Spiller, J.A. | Austin, TX 78735 | Oil & Gas Operator | Jan 2016 |
| 236 | Spiller, Joseph A. | Austin, TX 78746 | Oil & Gas Operator | Oct 1993 |
| 237 | Sue-Ann Production Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 238 | T. A. W. Company | Kingsbury, TX 78638 | Oil & Gas Operator | Dec 2025 |
| 239 | Taber, Alan R. | La Vernia, TX 78121 | Oil Operator | Dec 2025 |
| 240 | Tanglehead Operating, LLC | La Vernia, TX 78121 | Oil Operator | Dec 2025 |
| 241 | Tanglewood Oil & Gas Co. | Gouldbusk, TX 76845 | Oil & Gas Operator | Dec 2025 |
| 242 | Tejones Operating Corporation | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2025 |
| 243 | Tenison Oil Company | Abilene, TX 79605 | Oil & Gas Operator | Oct 2025 |
| 244 | Terra Locus Services | Seguin, TX 78155 | Oil & Gas Operator | Jun 2000 |
| 245 | Texas Coastal Resources LLC | Fairhope, AL 36532 | Oil Operator | Dec 2025 |
| 246 | Texas Petroleum Investment Company | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 247 | Texas Secondary Oil Corporation | Devine, TX 78016 | Oil & Gas Operator | Dec 2025 |
| 248 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 249 | Texokan Operating, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 250 | Texstar Oil & Gas, LLC | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 251 | Thomas Oil & Gas Company | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 252 | Thrall Operating Company, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 253 | Three J Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Dec 2025 |
| 254 | Tren Energy LLC | El Paso, TX 79912 | Oil & Gas Operator | Dec 2025 |
| 255 | Tri-W Oil | Luling, TX 78648 | Oil Operator | Dec 2025 |
| 256 | Tri-W Oil, Inc. | Luling, TX 78648 | Oil Operator | Apr 2007 |
| 257 | U.S. Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 258 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Jan 2001 |
| 259 | United Oil & Minerals, Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2001 |
| 260 | Upland Operating, LLC | Dallas, TX 75226 | Oil & Gas Operator | Dec 2025 |
| 261 | Uvalde Energy Co. | Austin, TX 78747 | Oil & Gas Operator | Nov 1994 |
| 262 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 263 | Vintage Petroleum, LLC | Houston, TX 77210 | Oil & Gas Operator | Dec 2019 |
| 264 | Viva Petrol LLP | Pflugerville, TX 78660 | Oil Operator | Dec 2025 |
| 265 | W.W. Energy | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 266 | Wehunt Oil Company, Inc. | Dallas, TX 75376 | Oil & Gas Operator | Nov 2002 |
| 267 | Wilson, Billy R. | New Braunfels, TX 78130 | Oil & Gas Operator | Dec 2025 |
| 268 | Windmill Oil Company | Austin, TX 78747 | Oil & Gas Operator | Mar 2008 |
| 269 | Xenon Energy, Inc. | Plano, TX 75074 | Oil & Gas Operator | Aug 2003 |
| 270 | York E & P, LLC | Boling, TX 77420 | Oil & Gas Operator | Dec 2025 |
| 271 | Zaf Oil | San Antonio, TX 78230 | Oil & Gas Operator | Aug 2002 |