| 201 | Landrum Petroleum Co., Inc. | Burkburnett, TX 76354 | Oil Operator | Mar 2008 |
| 202 | Landrum West, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 1997 |
| 203 | Layline Energy I LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2019 |
| 204 | LC Operating, LLC | Burkburnett, TX 76354 | Oil & Gas Operator | Apr 2025 |
| 205 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Apr 2025 |
| 206 | Lillis, Michael D. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 207 | Limestone Oil & Gas Co. | Wichita Falls, TX 76302 | Oil & Gas Operator | Jul 2002 |
| 208 | Lincoln Energy Partners, LLC | South Dennis, MA 02660 | Oil Operator | Apr 2025 |
| 209 | Lindemann, W. L., DRLG. Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1994 |
| 210 | Lindemann, W.L., Oper. Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2006 |
| 211 | LMH Energy | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 212 | Lode Holdings, LLC | Wichita Falls, TX 76301 | Oil Operator | Apr 2025 |
| 213 | Lofton, W. A. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 1998 |
| 214 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 215 | Loutex Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 216 | Macha Enterprises, Inc. | Wichita Falls, TX 76309 | Oil Operator | Apr 2025 |
| 217 | Madison Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 218 | Martis Valley Energy, LLC | Wichita Falls, TX 76310 | Oil Operator | Apr 2025 |
| 219 | Masa Energy LLC | Houston, TX 77094 | Oil & Gas Operator | Apr 2025 |
| 220 | Masada Oil & Gas | Quanah, TX 79252 | Oil & Gas Operator | Apr 2025 |
| 221 | McClure Brothers | Denton, TX 76210 | Oil & Gas Operator | Apr 2025 |
| 222 | McCormick Operating, L.L.C. | Olney, TX 76374 | Oil Operator | Sep 2015 |
| 223 | McCracken, H. L. Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Apr 2025 |
| 224 | McLemore, Laurence | Iowa Park, TX 76367 | Oil & Gas Operator | Apr 2025 |
| 225 | Medders Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 226 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 227 | Miller, Bob I. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 228 | Mineral Development, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1996 |
| 229 | MJ Oil Company | Minerva, OH 44657 | Oil & Gas Operator | Dec 2008 |
| 230 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2016 |
| 231 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |
| 232 | Moncrief W A Jr | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2025 |
| 233 | Mote Resources, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2004 |
| 234 | Mountain Creek Oil Company, Inc. | Saint Jo, TX 76265 | Oil & Gas Operator | Apr 2025 |
| 235 | Newberry, Charles D Inc | Campbellsvlle, KY 42719 | Oil Operator | Apr 2025 |
| 236 | NHRG Inc | Wichita Falls, TX 76308 | Oil Operator | Apr 2025 |
| 237 | NJL Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Feb 2007 |
| 238 | Noc | Iowa Park, TX 76367 | Oil & Gas Operator | Dec 2020 |
| 239 | Northfork Exploration LLC | Electra, TX 76360 | Oil Operator | Apr 2025 |
| 240 | Numar Oil And Gas Corporation | Sante Fe, NM 87502 | Oil & Gas Operator | Apr 2025 |
| 241 | O'Neal Operating Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1999 |
| 242 | O'Neil, Pat | Wichita Falls, TX 76308 | Oil & Gas Operator | Nov 2005 |
| 243 | Oakland Petroleum Oper Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 244 | Oasis Operating, Inc. | Lubbock, TX 79404 | Oil & Gas Operator | Nov 2020 |
| 245 | Oklahoma Operating, LLC | Holliday, TX 76366 | Oil Operator | Nov 2003 |
| 246 | Os&S Operating Inc. | Electra, TX 76360 | Oil & Gas Operator | Apr 2025 |
| 247 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 248 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2025 |
| 249 | Pace And Ray Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Apr 2025 |
| 250 | Paradigm Exploration Company | Dallas, TX 75214 | Oil Operator | Sep 2020 |
| 251 | Patton Exploration, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 252 | Patton, Donald L & Jerry | Electra, TX 76360 | Oil & Gas Operator | Aug 2007 |
| 253 | Patton, Lloyd | Fort Worth, TX 76113 | Oil & Gas Operator | Aug 2003 |
| 254 | PB Oil Company | Vernon, TX 76385 | Oil & Gas Operator | Oct 2023 |
| 255 | Pennington, W. L., Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 1996 |
| 256 | PF Operating Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Aug 2003 |
| 257 | Phillips 66 Company | Bartlesville, OK 74004 | Oil & Gas Operator | Aug 1997 |
| 258 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 259 | Pinnacle Operating Company, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Apr 2025 |
| 260 | Pony Oil Company | Borger, TX 79008 | Oil & Gas Operator | Jul 2001 |
| 261 | Preferred Pipeline Corp. | Victoria, TX 77902 | Oil & Gas Operator | Mar 2025 |
| 262 | Prickett Operating Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Mar 2008 |
| 263 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 264 | Prince Properties, Inc. | Electra, TX 76360 | Oil & Gas Operator | Aug 2003 |
| 265 | Pro. Energy I Resource, LLC | Haslet, TX 76052 | Oil Operator | Apr 2025 |
| 266 | Producers Operating Co Inc | Amarillo, TX 79105 | Oil & Gas Operator | Apr 2025 |
| 267 | Production Management Associates | Plano, TX 75075 | Oil & Gas Operator | Apr 2025 |
| 268 | Publishers Petroleum | Dallas, TX 75219 | Oil & Gas Operator | Aug 2003 |
| 269 | Quatro Oil And Gas, Inc. | Joshua, TX 76058 | Oil & Gas Operator | Apr 2025 |
| 270 | Rabalais, F.W. Inc. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2023 |
| 271 | Rajoil Inc. | Vernon, TX 76384 | Oil & Gas Operator | Aug 2003 |
| 272 | Ranger Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 273 | Ranphil, LLC | Hiltn Head Is, SC 29928 | Oil & Gas Operator | Feb 2016 |
| 274 | Red River Crude Oil LLC | Houston, TX 77081 | Oil Operator | Jan 2025 |
| 275 | Red River Operating & DRLG. Co. | Electra, TX 76360 | Oil & Gas Operator | Apr 2025 |
| 276 | Red River Petroleum Inc | Tipton, OK 73570-0351 | Oil Operator | Jan 2025 |
| 277 | Reed, Trace | Bridgeport, TX 76426 | Oil & Gas Operator | Apr 2025 |
| 278 | Reef Exploration, Inc. (A-1) | Richardson, TX 75080 | Oil & Gas Operator | Oct 2006 |
| 279 | Ridge Petroleum Inc. | Tyler, TX 75701 | Oil & Gas Operator | Apr 2025 |
| 280 | Riggins Energy Inc. | Vernon, TX 76385 | Oil & Gas Operator | Jul 2004 |
| 281 | Rio Petroleum, Inc. | Amarillo, TX 79102 | Oil & Gas Operator | Apr 2025 |
| 282 | Roberts & Hammack, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2025 |
| 283 | Rockstar Production, LLC | Graham, TX 76450 | Oil Operator | Apr 2025 |
| 284 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Apr 2025 |
| 285 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 286 | S & B Operating, LLC | Iowa Park, TX 76367 | Oil Operator | Apr 2025 |
| 287 | S & H Oil Company | Vernon, TX 76384 | Oil & Gas Operator | Sep 1999 |
| 288 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 289 | S & M Drilling, LLC | Wichita Falls, TX 76308 | Oil Operator | Sep 2023 |
| 290 | S&G Oil LLC | Wichita Falls, TX 76309 | Oil & Gas Operator | Apr 2025 |
| 291 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | Apr 2025 |
| 292 | Salvador Oil, LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 293 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 294 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 295 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 296 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2025 |
| 297 | Sanco Operating Company | Bullard, TX 75757 | Oil & Gas Operator | Apr 2025 |
| 298 | Schalk Oil Company, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 299 | Senora Resources, Inc. | Dime Box, TX 77853 | Oil & Gas Operator | Apr 2025 |
| 300 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |