| 201 | Scala Energy Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 202 | Scan Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2004 |
| 203 | Scana Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Dec 1999 |
| 204 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 205 | Scana Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2005 |
| 206 | Schaefer, Gary L. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2017 |
| 207 | Schaffner, Cecil | Byers, TX 76357 | Oil & Gas Operator | Apr 2004 |
| 208 | Schalk Oil Company, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 209 | Schalk, Thomas S. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 1995 |
| 210 | Schenk Oil Co. | Scotland, TX 76379 | Oil Operator | Apr 2024 |
| 211 | Scheriger Production | Graham, TX 76450 | Oil & Gas Operator | Jun 2006 |
| 212 | Schetawee, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Mar 2008 |
| 213 | Schievelbein, Bryan O. | Seguin, TX 78155 | Oil & Gas Operator | Apr 2024 |
| 214 | Schiff, H. G. & Co. | Dallas, TX 75206 | Oil & Gas Operator | Jul 1993 |
| 215 | Schkade & Bullock | San Angelo, TX 76901 | Oil & Gas Operator | Aug 2003 |
| 216 | Schkade Bros. Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 2021 |
| 217 | Schkade Exploration | San Angelo, TX 76901 | Oil & Gas Operator | Apr 2024 |
| 218 | Schkade Production Co. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2020 |
| 219 | Schkade, Carl E. | Albany, TX 76430 | Oil & Gas Operator | Sep 2009 |
| 220 | Schkade, Harold | Albany, TX 76430 | Oil & Gas Operator | Apr 2024 |
| 221 | Schkade, Louis | Albany, TX 76430 | Oil & Gas Operator | Mar 2008 |
| 222 | Schlachter Operating Corporation | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 223 | Schlachter, David A. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2015 |
| 224 | Schlachter, David A., Estate Of | Dallas, TX 75225 | Oil & Gas Operator | Jan 2000 |
| 225 | Schlagal, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2016 |
| 226 | Schlittler, Willard | Bryson, TX 76427 | Oil & Gas Operator | Apr 2024 |
| 227 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | Apr 2024 |
| 228 | Schneider, Ernest | Rockdale, TX 76567 | Oil & Gas Operator | Dec 2014 |
| 229 | Schreiber, Lloyd | Scotland, TX 76379 | Oil & Gas Operator | Dec 2000 |
| 230 | Schroeder Oil Properties | Graham, TX 76450 | Oil & Gas Operator | Jul 2022 |
| 231 | Schwab City Resources | Leggett, TX 77350 | Oil & Gas Operator | Aug 2013 |
| 232 | Scoggins Oil & Gas Co. | Seabrook, TX 77586 | Oil & Gas Operator | Jun 2000 |
| 233 | Scope Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2009 |
| 234 | Scorpion Oil & Gas, LLC | Houston, TX 77036 | Oil & Gas Operator | Oct 2023 |
| 235 | Scorpion Operating, Inc. | Benavides, TX 78341 | Oil Operator | Apr 2024 |
| 236 | Scott Oil Company | Corsicana, TX 75110 | Oil & Gas Operator | Apr 2011 |
| 237 | Scott Operating, Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2024 |
| 238 | Scott Petroleum, Inc. | Dallas, TX 75244 | Oil & Gas Operator | May 1995 |
| 239 | Scott, Stephen | Olney, TX 76374 | Oil Operator | Oct 2011 |
| 240 | Scott, Steve Engineering | Midland, TX 79710 | Oil & Gas Operator | Apr 2005 |
| 241 | Scout Energy LTD Liability Co | Inez, TX 77968 | Oil & Gas Operator | Apr 2024 |
| 242 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Apr 2024 |
| 243 | Scranton Exploration | Eastland, TX 76448 | Oil & Gas Operator | Apr 2024 |
| 244 | Scribner, Jeff | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2004 |
| 245 | Scroggins, Bruce E. | Gilmer, TX 75645 | Oil & Gas Operator | Aug 2004 |
| 246 | SCS Newton Oil LLC | Perryton, TX 79070 | Oil & Gas Operator | Apr 2024 |
| 247 | Scully And Smith Oil Corporation | Salado, TX 76571 | Oil & Gas Operator | Feb 1995 |
| 248 | Scully Energy Corporation | Salado, TX 76571 | Oil & Gas Operator | Mar 2012 |
| 249 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 250 | SD Royale Energy, Inc. | San Diego, CA 92159 | Oil & Gas Operator | Apr 2024 |
| 251 | SDB Oil & Gas, LLC | Pasadena, TX 77502 | Oil Operator | Apr 2024 |
| 252 | SDG Operating Company, Inc | Tyler, TX 75701 | Oil & Gas Operator | Apr 2024 |
| 253 | SDG Resources L.P. | Montrose, CO 81402 | Oil & Gas Operator | May 2006 |
| 254 | SDG Services LLC | Kilgore, TX 75663 | Oil Operator | Apr 2024 |
| 255 | SDMB Resources LLC | Graham, TX 76450 | Gas Operator | Apr 2024 |
| 256 | SDX Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 257 | Se USA Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2009 |
| 258 | Sea Eagle Ford, LLC | Denver, CO 80265 | Oil & Gas Operator | Jun 2022 |
| 259 | Sea Sand Oil Company | Fort Worth, TX 76185 | Oil & Gas Operator | Jun 1995 |
| 260 | Seaboard Oil Company | Midland, TX 79710 | Oil & Gas Operator | Mar 2008 |
| 261 | Seaboard Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 262 | Seabreeze Production Co | Hungerford, TX 77448 | Oil & Gas Operator | Apr 2024 |
| 263 | Seaco Production | Dripping SPGS, TX 78620 | Oil & Gas Operator | Feb 2016 |
| 264 | Seago Operating Co., L.L.C. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2011 |
| 265 | Seago Petroleum, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2024 |
| 266 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 267 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 268 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 269 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2024 |
| 270 | Seahawk Oil & Gas Company | Dallas, TX 75379 | Oil & Gas Operator | Aug 2007 |
| 271 | Seal Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Dec 2006 |
| 272 | Seale, Don R. | Electra, TX 76360 | Oil & Gas Operator | Apr 2024 |
| 273 | Seanard Energy Company | Baton Rouge, LA 70808 | Oil & Gas Operator | Jul 2002 |
| 274 | Searchers Exploration | Brenham, TX 77833 | Oil Operator | Apr 2024 |
| 275 | Seashore Energy, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Apr 2024 |
| 276 | Seattle'S Best Consulting LLC | Austin, TX 78731 | Oil & Gas Operator | Apr 2024 |
| 277 | Seay Exploration, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2008 |
| 278 | Seay Oil & Gas, LTD. | Dripping SPGS, TX 78620 | Oil & Gas Operator | Apr 2013 |
| 279 | Seco Petroleum Corp | Houston, TX 77290 | Oil & Gas Operator | Jan 1997 |
| 280 | Seco Production Company | Midland, TX 79708 | Oil & Gas Operator | Aug 2003 |
| 281 | Secondary Gas Recovery Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1993 |
| 282 | Secondary Oil Corp., Inc. | Austin, TX 78750 | Oil Operator | Apr 1999 |
| 283 | Sed Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 284 | Sedco Resources Inc | Kerrville, TX 78029 | Oil & Gas Operator | Apr 2024 |
| 285 | Sedona Oil & Gas Corporation | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 286 | Seek Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2024 |
| 287 | Seeker Oil Company II, Inc. | San Antonio, TX 78209 | Oil Operator | Jan 2016 |
| 288 | Seeker Oil Company, Incorporated | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2024 |
| 289 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 290 | Seelye, William L. | Plano, TX 75024 | Oil & Gas Operator | Oct 2005 |
| 291 | Segler, Charles | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 292 | Segrest-Ward Joint Venture | Longview, TX 75606 | Oil & Gas Operator | Jun 2001 |
| 293 | Seguin Pump | Seguin, TX 78155 | Oil & Gas Operator | Sep 2017 |
| 294 | Seguro Oil And Gas, LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2024 |
| 295 | Seguro Well Service, Inc. | Gonzales, TX 78629 | Oil & Gas Operator | Apr 2024 |
| 296 | Sei Operating, LLC | Mandeville, LA 70471 | Oil & Gas Operator | Apr 2024 |
| 297 | Seidler Oil & Gas Operating, LLC | Alvarado, TX 76009 | Oil & Gas Operator | Apr 2024 |
| 298 | Seiguf Oil Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 299 | Seiran E & P Company, LLC | Friendswood, TX 77546 | Oil & Gas Operator | Apr 2024 |
| 300 | Seisgen Exploration, Inc | Houston, TX 77024 | Gas Operator | Aug 2005 |