| 201 | Omimex Petroleum Inc | Fort Worth, TX 76120 | Oil & Gas Operator | Aug 2022 |
| 202 | Ovintiv USA Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 203 | Palmer Petroleum, Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2025 |
| 204 | Paloma Natural Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 205 | Par Minerals Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2025 |
| 206 | Patara Oil & Gas LLC | Dallas, TX 75219 | Oil & Gas Operator | Mar 2018 |
| 207 | Patriot Operating Company, Inc. | Houston, TX 77008 | Oil & Gas Operator | Sep 2003 |
| 208 | Peoples Energy Prod.-TX, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2007 |
| 209 | Permian Natural Resources | Pflugerville, TX 78660 | Oil & Gas Operator | Dec 2025 |
| 210 | Perryman Operating Company | Athens, TX 75751 | Oil & Gas Operator | Dec 2025 |
| 211 | Petrohawk Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2005 |
| 212 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 213 | PG-M International Operating,LLC | Borger, TX 79008 | Oil & Gas Operator | Dec 2025 |
| 214 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 215 | Pine Wave Energy Partners Op,LLC | Dallas, TX 75205 | Oil & Gas Operator | Dec 2025 |
| 216 | Pioneer Energy Corporation | Dallas, TX 75204 | Oil & Gas Operator | Dec 2025 |
| 217 | Placid Oil Company | Houston, TX 77227 | Oil & Gas Operator | Mar 2008 |
| 218 | Plains Exploration & Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 219 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 220 | Powerline Energy Corporation | Arlington, TX 76015 | Oil & Gas Operator | Dec 2025 |
| 221 | Princess Three Operating, LLC | Henderson, TX 75653 | Oil & Gas Operator | Dec 2025 |
| 222 | Questar Expl. And Prod. Co. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jul 2011 |
| 223 | R&F Operating Company | Carthage, TX 75633 | Oil Operator | Dec 2025 |
| 224 | Red Rock Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2015 |
| 225 | Regent Oil & Gas Company, L.P. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2006 |
| 226 | Reichmann Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Dec 2025 |
| 227 | Reynolds Drilling Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Dec 2025 |
| 228 | Rfe Operating, LLC | Tyler, TX 75703 | Oil & Gas Operator | Dec 2025 |
| 229 | Richman Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2006 |
| 230 | Riverstone Energy Operating, LLC | Houston, TX 77090 | Oil & Gas Operator | Dec 2025 |
| 231 | RLM Energy Company Inc. | Monroe, LA 71201 | Oil & Gas Operator | Mar 2008 |
| 232 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 233 | Rockcliff Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 234 | Roosth Production Co. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2025 |
| 235 | Rosbottom Production Corp | Shreveport, LA 71134 | Oil & Gas Operator | Dec 2017 |
| 236 | Rosetta Energy Partners, L P | Dallas, TX 75219 | Oil & Gas Operator | Jul 2009 |
| 237 | Ross Production Co. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2000 |
| 238 | Rudman Partnership, The | Dallas, TX 75201 | Oil & Gas Operator | Dec 2014 |
| 239 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 240 | Sabine Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2017 |
| 241 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 242 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 243 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 244 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 245 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2025 |
| 246 | Santa Fe Operating LLC | Frisco, TX 75034 | Oil & Gas Operator | Dec 2025 |
| 247 | SDG Operating Company, Inc | Tyler, TX 75701 | Oil & Gas Operator | Dec 2025 |
| 248 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 249 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 250 | Sensor Oil & Gas, Inc. | Duncan, OK 73534 | Oil & Gas Operator | May 2013 |
| 251 | Shelby Boswell Operator, LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2025 |
| 252 | Shelby Operating, Inc. | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 1997 |
| 253 | Shelby Production Co. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2009 |
| 254 | Sheldon Resources, L.P. | Bryan, TX 77805 | Oil & Gas Operator | Dec 2025 |
| 255 | Sheridan Production Co III, LLC | Houston, TX 77056 | Oil & Gas Operator | Dec 2025 |
| 256 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 257 | Shoco Production LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 258 | Shoco Production, L.P. | Kilgore, TX 75663 | Oil & Gas Operator | May 2020 |
| 259 | Silver Hill Energy Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 260 | Silver Oak Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2009 |
| 261 | Silver Oak Operating, LLC | Longview, TX 75604 | Oil & Gas Operator | Dec 2025 |
| 262 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Dec 2025 |
| 263 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Dec 2025 |
| 264 | Smith & Marrs Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2021 |
| 265 | Smith Oil Co. | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 266 | Smith, E.N. III Energy Corp. | Marshall, TX 75671 | Oil & Gas Operator | Sep 2006 |
| 267 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 268 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 269 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 270 | Sonat Exploration Company-MCR | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 271 | Sonora Petroleum Corp. | Austin, TX 78734 | Oil & Gas Operator | Dec 2025 |
| 272 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 273 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Dec 2025 |
| 274 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 275 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Dec 2025 |
| 276 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 277 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Sep 2025 |
| 278 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 279 | Tana Exploration Company LLC | Dallas, TX 75219 | Oil & Gas Operator | Aug 2021 |
| 280 | Tanos Exploration II, LLC | Tyler, TX 75701 | Oil & Gas Operator | Sep 2023 |
| 281 | Tanos Exploration, LLC | Houston, TX 77010 | Oil & Gas Operator | Oct 2018 |
| 282 | Texas Land & Petro Co., LLC | Carrollton, TX 75010 | Oil & Gas Operator | Dec 2025 |
| 283 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 284 | Textron Southwest Inc. | Henderson, TX 75654 | Oil & Gas Operator | Dec 2025 |
| 285 | Textron Southwest L.L.C. | Addison, TX 75001 | Oil & Gas Operator | Oct 2004 |
| 286 | TGNR East Texas II LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 287 | Tidemark Exploration Inc | Tulsa, OK 74120 | Oil & Gas Operator | Apr 2019 |
| 288 | Travis Operating, LLC | Kingwood, TX 77345 | Oil & Gas Operator | Dec 2025 |
| 289 | Trinidad Exploration, Inc. | Tyler, TX 75703 | Oil & Gas Operator | Mar 2008 |
| 290 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Jan 2001 |
| 291 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2025 |
| 292 | Us. Fuels, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 293 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Dec 2025 |
| 294 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Jun 2025 |
| 295 | Vinland Texas Services LLC | Electra, TX 76360 | Oil & Gas Operator | Jun 2024 |
| 296 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 297 | Westside Energy Op. Co., LP | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2008 |
| 298 | Weyerhaeuser Company | Crossett, AR 71635 | Oil & Gas Operator | Sep 1994 |
| 299 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Dec 2025 |
| 300 | Winn Exploration Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2025 |