| 201 | Perkins-Prothro Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2002 |
| 202 | Permian Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 203 | Petro-West Corporation | Lubbock, TX 79404 | Oil & Gas Operator | Oct 2001 |
| 204 | Petroleum Technical Services Co. | Midland, TX 79707 | Oil & Gas Operator | Dec 2004 |
| 205 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 206 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 207 | Pioneer Energy Corporation | Dallas, TX 75204 | Oil & Gas Operator | Dec 2025 |
| 208 | Plano Petroleum Corporation | McKinney, TX 75070 | Oil & Gas Operator | Sep 2025 |
| 209 | PM Oil & Gas, Inc. | San Angelo, TX 76903 | Oil Operator | Dec 2025 |
| 210 | Pro- Gas, Inc. | Midland, TX 79711 | Oil & Gas Operator | Dec 2025 |
| 211 | Production Operators Of TX, LLC | Abilene, TX 79605 | Oil & Gas Operator | Dec 2025 |
| 212 | Purvis Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 213 | Purvis, J. H. | Midland, TX 79702 | Oil & Gas Operator | Dec 1994 |
| 214 | Quintx Exploration, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Nov 2007 |
| 215 | R & R Well Service | Fort Worth, TX 76120 | Oil & Gas Operator | Jan 2005 |
| 216 | R & R Well Service, Inc. | Arlington, TX 76012 | Oil & Gas Operator | Dec 2025 |
| 217 | Radius Operating, LLC | Round Rock, TX 78664 | Oil & Gas Operator | Dec 2025 |
| 218 | Rebco Oil, Inc. | Desdemona, TX 76445 | Oil Operator | Dec 2025 |
| 219 | Red Tank Resources, LLC | Dallas, TX 75379 | Oil & Gas Operator | Dec 2025 |
| 220 | Redwood Operating, Inc. | Houston, TX 77058 | Oil & Gas Operator | Dec 2025 |
| 221 | Rex Energy Operating Corp. | State College, PA 16801 | Oil & Gas Operator | Jun 2012 |
| 222 | Richman Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2006 |
| 223 | Rockwood Resources Inc | Coleman, TX 76834 | Oil & Gas Operator | Dec 2025 |
| 224 | Rosenthal, Stanley H. | Bay City, TX 77404 | Oil & Gas Operator | Dec 2020 |
| 225 | Ross Production Co. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2000 |
| 226 | Ross, Dwight M. DRLG. Co., Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 227 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 228 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 229 | S & P Energy | Benbrook, TX 76126 | Oil & Gas Operator | Oct 1994 |
| 230 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | Dec 2025 |
| 231 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 232 | San Angelo Cetco, Inc. | San Angelo, TX 76901 | Oil & Gas Operator | Mar 1998 |
| 233 | Schalk Oil Company, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 234 | Schlachter, David A. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2015 |
| 235 | Sedona Oil & Gas Corporation | Austin, TX 78746 | Oil & Gas Operator | Dec 2025 |
| 236 | Sequoia Fossil Fuels, Inc. | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 237 | Shoshone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | May 1994 |
| 238 | Sierra Exploration Company | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2008 |
| 239 | Simpson Oil Company | Odessa, TX 79760 | Oil & Gas Operator | Oct 2004 |
| 240 | Sinclair Energy Corporation | Fort Worth, TX 76177 | Oil & Gas Operator | Dec 2025 |
| 241 | Smail, James R. | Big Prairie, OH 44611 | Oil & Gas Operator | Dec 1998 |
| 242 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 243 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 244 | Smith, Joe T., Inc. | Hawley, TX 79525 | Oil & Gas Operator | Dec 2025 |
| 245 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 246 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 247 | Spalding Energy, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 248 | Spenergy Corp. | Midland, TX 79701 | Oil & Gas Operator | Dec 1999 |
| 249 | Spi Operations LLC | Midland, TX 79710 | Oil & Gas Operator | Jan 2013 |
| 250 | Spiral Energy Corp. | Midland, TX 79705 | Oil & Gas Operator | Dec 2019 |
| 251 | Sproul, C. R. Inc. | Eldorado, TX 76936 | Oil & Gas Operator | Aug 2000 |
| 252 | SRG Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 1994 |
| 253 | Stallion Oil Company | Lafayette, LA 70505 | Oil & Gas Operator | Jun 2004 |
| 254 | Star Production, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Dec 2025 |
| 255 | Startex Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 256 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 257 | Stream Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2025 |
| 258 | Subsurface Production, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Dec 2025 |
| 259 | Sullivan, Hollis R. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2009 |
| 260 | Sundown Oil Operating, LLC | Graham, TX 76450 | Oil Operator | Dec 2025 |
| 261 | Swartz Oil Company | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2025 |
| 262 | Sweetwater Drilling Co., Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2025 |
| 263 | Tahoe Exploration Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2016 |
| 264 | Taurus Minerals, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 265 | TCS Petroleum Co., LLC | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 266 | Texas Concho Operating Co. | Eldorado, TX 76936 | Oil & Gas Operator | Mar 1999 |
| 267 | Texas Operating Partners LLC | Tomball, TX 77377 | Oil & Gas Operator | Dec 2025 |
| 268 | Texas Royalty Corp. | Austin, TX 78746 | Oil & Gas Operator | Dec 2025 |
| 269 | Texcal Resources, Inc. | Plano, TX 75094 | Oil & Gas Operator | Apr 1994 |
| 270 | Texzona Oil & Gas, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 1997 |
| 271 | THP Operating LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Dec 2025 |
| 272 | TKP Petroleum, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Dec 2025 |
| 273 | Topat Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Sep 2017 |
| 274 | Trend Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 275 | Tri-Dyne Resources, Inc. | Southern Pine, NC 28387 | Oil & Gas Operator | Feb 2000 |
| 276 | Triag Energy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2014 |
| 277 | Triangle P Development Corp. | Bronte, TX 76933 | Oil & Gas Operator | Dec 2025 |
| 278 | Trich Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2025 |
| 279 | Trout Oil Company, Inc. | Odessa, TX 79762 | Oil & Gas Operator | Dec 2025 |
| 280 | TSW Oil & Gas, LLC | Abilene, TX 79602 | Oil & Gas Operator | Jan 2016 |
| 281 | Tucker Drilling Company, Inc. | San Angelo, TX 76903 | Oil & Gas Operator | Jul 1996 |
| 282 | Tuthill & Barbee | Amarillo, TX 79101 | Oil & Gas Operator | Nov 1994 |
| 283 | Ultra Oil & Gas, Inc. | Centerton, AR 72719 | Oil & Gas Operator | Dec 2025 |
| 284 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 285 | Valera Oil Company | Kingsland, TX 78639 | Oil & Gas Operator | Apr 2000 |
| 286 | Verdad Oil & Gas Corporation | Dallas, TX 75235 | Oil & Gas Operator | Dec 2025 |
| 287 | Viathon Hydrocarbons, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Oct 2020 |
| 288 | Vinson Operating Company | Midland, TX 79706 | Oil & Gas Operator | Dec 1999 |
| 289 | Viola Production Inc | Dallas, TX 75251 | Oil & Gas Operator | Dec 2025 |
| 290 | W.R. Guffey LLC | Dallas, TX 75206 | Oil & Gas Operator | Jul 2020 |
| 291 | Waggoner-Baldridge Oper. Co, Inc | Dallas, TX 75206 | Oil & Gas Operator | Jan 1998 |
| 292 | Wagner Energy LLC | Enid, OK 73701 | Oil Operator | Oct 2025 |
| 293 | Watco Energy, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Apr 1996 |
| 294 | WBR, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 1995 |
| 295 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Nov 2025 |
| 296 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 297 | Western Pride Resources, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jan 2011 |
| 298 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 299 | Wilbanks, Bruce A. | Midland, TX 79701 | Oil & Gas Operator | Aug 1996 |
| 300 | Wilbanks, Bruce A. Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |