| 201 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 202 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 203 | Permian Natural Resources | Tyler, TX 75701 | Oil & Gas Operator | Jun 2026 |
| 204 | Petralis Energy Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 205 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 206 | Phylko Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Aug 2003 |
| 207 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 208 | Pinnacle Operating Company, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Jun 2026 |
| 209 | Pitco Investments, LTD. | Scottsdale, AZ 85261 | Oil & Gas Operator | Jan 2013 |
| 210 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 211 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 212 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 213 | Powell, Gene Investments, Inc. | Longview, TX 75608 | Oil & Gas Operator | Apr 2024 |
| 214 | Prosper Oil & Gas,Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jun 2026 |
| 215 | Red Stone Resources LLC | Edmond, OK 73013 | Oil Operator | Jun 2023 |
| 216 | Revenant Energy Operating LLC | Plano, TX 75024 | Gas Operator | Jun 2026 |
| 217 | Rhonda Operating Company | Midland, TX 79710 | Oil & Gas Operator | Aug 2017 |
| 218 | Rippy Oil Company | Tyler, TX 75702 | Oil & Gas Operator | Jun 2026 |
| 219 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 220 | Robert C. Brower, LLC | Southlake, TX 76092 | Oil & Gas Operator | Jun 2026 |
| 221 | Rockcliff Energy Operating III LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 222 | Rockcliff Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 223 | Roosth & Genecov Production Co. | Tyler, TX 75710 | Oil & Gas Operator | Aug 2003 |
| 224 | Roosth Production Co. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2026 |
| 225 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Jun 2026 |
| 226 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 227 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 228 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2026 |
| 229 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 230 | Sand Springs Oil & Gas Co. | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2026 |
| 231 | Scheriger Production | Graham, TX 76450 | Oil & Gas Operator | Jun 2006 |
| 232 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Jun 2026 |
| 233 | SDG Operating Company, Inc | Tyler, TX 75701 | Oil & Gas Operator | Jun 2026 |
| 234 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 235 | Shelby Boswell Operator, LLC | Dallas, TX 75225 | Oil & Gas Operator | Jun 2026 |
| 236 | Sheridan Production Co III, LLC | Houston, TX 77056 | Oil & Gas Operator | Jun 2026 |
| 237 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 238 | Shoco Production LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 239 | Shoco Production, L.P. | Kilgore, TX 75663 | Oil & Gas Operator | May 2020 |
| 240 | Sikes Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2003 |
| 241 | Silver Oak Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2009 |
| 242 | Silver Oak Operating, LLC | Longview, TX 75604 | Oil & Gas Operator | Jun 2026 |
| 243 | Skinner Energy Management, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Jan 2011 |
| 244 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Jun 2026 |
| 245 | Smal Energy Corp | Tyler, TX 75710 | Oil & Gas Operator | Oct 1995 |
| 246 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 247 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 248 | Sonerra Resources Corporation | Nacogdoches, TX 75963 | Oil & Gas Operator | Jun 2026 |
| 249 | Southerland, Glenn Oil & Gas Co. | Hallsville, TX 75650 | Oil & Gas Operator | Feb 2021 |
| 250 | Southwest Energy LP | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 251 | Southwest Operating, Inc.-Tyler | Tyler, TX 75701 | Oil & Gas Operator | Jun 2026 |
| 252 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 253 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 254 | Stroube Energy Corporation | Dallas, TX 75248 | Oil & Gas Operator | Jan 2012 |
| 255 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Jun 2026 |
| 256 | Sunland Production Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2025 |
| 257 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Dec 2025 |
| 258 | Sydri Operating, LLC | Dallas, TX 75231 | Oil & Gas Operator | Jun 2026 |
| 259 | Tab Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 260 | Tanos Exploration II, LLC | Tyler, TX 75701 | Oil & Gas Operator | Sep 2023 |
| 261 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | Jun 2026 |
| 262 | Tensas Delta Explo. Co., LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2011 |
| 263 | Terrafina Energy, LLC | San Antonio, TX 78280 | Oil & Gas Operator | Jun 2026 |
| 264 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 265 | Texian Operating Company, LLC | Irving, TX 75063 | Oil & Gas Operator | Jun 2026 |
| 266 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 267 | Texlan Oil Company, L.C. | Tyler, TX 75711 | Oil & Gas Operator | Aug 2003 |
| 268 | TGNR East Texas II LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 269 | TGNR East Texas LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 270 | TGNR Gulf Coast LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 271 | Titan Rock E&P, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2024 |
| 272 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2026 |
| 273 | Tracy Production | Lindale, TX 75771 | Oil & Gas Operator | Jun 2026 |
| 274 | Trailblazer Energy Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2026 |
| 275 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Jan 2001 |
| 276 | Uphill Consulting LLC | Pearland, TX 77584 | Oil & Gas Operator | Jun 2026 |
| 277 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Jun 2026 |
| 278 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Jun 2026 |
| 279 | Virtex Operating Company, Inc. | Corpus Christ, TX 78401 | Oil & Gas Operator | Oct 2023 |
| 280 | Virtex Petroleum Company, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Jan 2008 |
| 281 | Wagner & Brown, LTD. | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 282 | Wagner, Duer & Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1999 |
| 283 | Wallace Operating Company LLC | Metairie, LA 70003 | Gas Operator | Jun 2026 |
| 284 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Jun 2026 |
| 285 | Western Natural Gas Company | Shelby, MT 59474 | Oil & Gas Operator | Feb 2026 |
| 286 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 287 | Winston Land & Cattle Co., Inc. | Lufkin, TX 75901 | Oil & Gas Operator | Feb 2001 |
| 288 | Winston Land & Cattle I, LTD. | Lufkin, TX 75902 | Oil & Gas Operator | Nov 2014 |
| 289 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Jun 2026 |
| 290 | Young, Clint Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 291 | Zadeck Energy Group | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2011 |