| 201 | Journey Operating LLC | Sugar Land, TX 77496 | Oil & Gas Operator | Aug 2006 |
| 202 | JQL Energy, LLC | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 203 | JTL Oil Company LLC | Wichita Falls, TX 76305 | Oil & Gas Operator | Dec 2025 |
| 204 | K & K Operating Co. | Rule, TX 79547 | Oil Operator | Dec 2005 |
| 205 | Kadane Corporation | Dallas, TX 75205 | Oil & Gas Operator | Dec 2025 |
| 206 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2025 |
| 207 | Kana Resources, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Aug 2003 |
| 208 | Kasle Energy Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Mar 2017 |
| 209 | Katsco Energy, Inc. | Round Rock, TX 78664 | Oil & Gas Operator | Dec 2025 |
| 210 | Kendrick Oil And Gas Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 211 | Kendrick Oil Co. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2008 |
| 212 | Kilpatrick Production Company | Tye, TX 79563 | Oil & Gas Operator | Dec 2025 |
| 213 | Kinder Morgan Production Co LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 214 | Kinder Morgan Production Co LP | Midland, TX 79701 | Oil & Gas Operator | Jul 2007 |
| 215 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 216 | Landmaster Partners, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Dec 2025 |
| 217 | Lane Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 218 | Laneer Resources Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 219 | Langford Production Company, LLC | Haskell, TX 79521 | Oil & Gas Operator | Dec 2025 |
| 220 | Langford, R. C. Operating Co. | Rule, TX 79547 | Oil & Gas Operator | Mar 1994 |
| 221 | Lariat Land & Exploration, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 222 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Dec 2025 |
| 223 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 224 | Liberty Operating Company, Inc. | Lake Dallas, TX 75065 | Oil & Gas Operator | Mar 2008 |
| 225 | Lillis, Michael D. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 226 | Lime Creek Enterprises | Aztec, NM 87410 | Oil & Gas Operator | Aug 2008 |
| 227 | Live Oak Gas Company | Dallas, TX 75251 | Oil & Gas Operator | Dec 2025 |
| 228 | LMN Oil And Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Mar 2008 |
| 229 | Lone Star Gas Co. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 230 | Lone Star Operating Company | Pearsall, TX 78061 | Oil & Gas Operator | Dec 2025 |
| 231 | Lone Star Pipeline Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 232 | Long Trusts, The | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 233 | Loudon Exploration, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2008 |
| 234 | Low-End Oil LLC | Austin, TX 78748 | Oil Operator | Dec 2025 |
| 235 | Lynx Oil Co., Inc. | Denton, TX 76207 | Oil & Gas Operator | Sep 2003 |
| 236 | Lytle Creek Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Dec 2025 |
| 237 | M & K Operating LLC | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 238 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | Dec 2025 |
| 239 | M.R.M. Operating, Inc. | Midland, TX 79707 | Oil & Gas Operator | Aug 2003 |
| 240 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Nov 2025 |
| 241 | Mathis & Sons, Inc. | Rule, TX 79547 | Oil & Gas Operator | Dec 2025 |
| 242 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 243 | Mayo, Eddie | Fredericksbrg, TX 78624 | Oil & Gas Operator | Dec 2025 |
| 244 | Mayo, Paul R. | Quinlan, TX 75474 | Oil & Gas Operator | May 1999 |
| 245 | McBee Company, The | Dallas, TX 75219 | Oil & Gas Operator | Dec 1997 |
| 246 | McClymond, LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2009 |
| 247 | McFarland & Scobey, Inc. | El Paso, TX 79947 | Oil & Gas Operator | Dec 2025 |
| 248 | McKeever, Tyra, Swenson Venture | Stamford, TX 79553 | Oil & Gas Operator | Apr 1996 |
| 249 | Mercury Exploration Co. | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 250 | Mercury Operating, LLC | Dallas, TX 75208 | Oil & Gas Operator | Dec 2025 |
| 251 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 252 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 253 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2025 |
| 254 | Mid-Continental Exploration,Inc. | Sanger, TX 76266 | Oil & Gas Operator | Dec 2025 |
| 255 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 256 | Miles Production Co. | Argyle, TX 76226 | Oil & Gas Operator | Mar 2008 |
| 257 | Mineral Development, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1996 |
| 258 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 259 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 260 | MMG Oil Company | Buffalo Gap, TX 79508 | Oil & Gas Operator | Aug 2006 |
| 261 | Mna Enterprises LTD. Co. | Hobbs, NM 88242 | Oil & Gas Operator | Oct 2025 |
| 262 | Moore Investment Co. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 263 | Morrell, W. R. | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 264 | Morris, W. Dale Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Dec 2025 |
| 265 | Mullins, Manuel | Olney, TX 76374 | Oil & Gas Operator | Dec 2025 |
| 266 | Musselman, Owen & King Oper.,Inc | Houston, TX 77002 | Oil & Gas Operator | Feb 1998 |
| 267 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
| 268 | Myco Industries, Inc. | Artesia, NM 88211 | Oil & Gas Operator | Feb 2015 |
| 269 | NBX Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 270 | Neatherlin, Earl Inc. | Avoca, TX 79503 | Oil & Gas Operator | Dec 2025 |
| 271 | Neeley, June | Mineral Wells, TX 76067 | Oil & Gas Operator | Feb 2008 |
| 272 | New Height Energy, LLC | Houston, TX 77063 | Oil & Gas Operator | Dec 2025 |
| 273 | Noel Operating, Inc. | Huntsville, TX 77340 | Oil & Gas Operator | Oct 2000 |
| 274 | Nordan Oil & Gas Corporation | Abilene, TX 79604 | Oil & Gas Operator | Feb 2018 |
| 275 | North American Exploration Co. | Abilene, TX 79602 | Oil & Gas Operator | Apr 1998 |
| 276 | Nosivad Oil, Inc. | Clyde, TX 79510 | Oil & Gas Operator | Dec 2025 |
| 277 | Novo Exploration Corporation | Hurst, TX 76053 | Oil & Gas Operator | Jun 2020 |
| 278 | O'Tool Oil & Gas, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2025 |
| 279 | Oakridge Oil And Gas, LP | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2025 |
| 280 | Oil & Gas Properties | Midland, TX 79704 | Oil & Gas Operator | Dec 2025 |
| 281 | Oilwell Operators, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Dec 2025 |
| 282 | Older Than Dirt LLC | Weatherford, TX 76086 | Oil & Gas Operator | Dec 2025 |
| 283 | Origin Production Group LLC | Luling, TX 78648 | Oil Operator | Dec 2025 |
| 284 | Orland Oil & Gas LLC | FT Lauderdale, FL 33305 | Oil Operator | Aug 2024 |
| 285 | Orth Oil Company, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Dec 2025 |
| 286 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 287 | Overland Operating Company, LLC | Abilene, TX 79601 | Oil Operator | Dec 2025 |
| 288 | P-Tex Petroleum, Inc. | Dallas, TX 75238 | Oil & Gas Operator | Nov 1999 |
| 289 | Pace Petroleum Company | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 290 | Paragon Corporation | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 291 | Paragon Oil & Gas, LLC | Aledo, TX 76008 | Oil & Gas Operator | Dec 2025 |
| 292 | Parallel Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Jan 2010 |
| 293 | Parmer, I. A. | Abilene, TX 79606 | Oil & Gas Operator | Oct 1993 |
| 294 | Paschal Petroleum, Inc. | Dallas, TX 75380 | Oil & Gas Operator | Apr 1994 |
| 295 | Patton Exploration, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 296 | Patton, E. N. Oil Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 297 | Peak Operating Of Texas, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2005 |
| 298 | Pecos Petroleum Company | Houston, TX 77057 | Oil & Gas Operator | Oct 1999 |
| 299 | Ped Oil Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 300 | Pendergraft Oil Co. | Lueders, TX 79533 | Oil & Gas Operator | Jan 1998 |