| 201 | Aec Oil & Gas USA Inc | Denver, CO 80202 | Oil & Gas Operator | May 2004 |
| 202 | Aec Operating Company | Roswell, NM 88202 | Oil & Gas Operator | Sep 2006 |
| 203 | Aeg Operating, LLC | Austin, TX 78746 | Oil Operator | Jun 2012 |
| 204 | Aegis Energy, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Sep 1998 |
| 205 | Aegis Fluids Management, LLC | Plano, TX 75093 | Oil & Gas Operator | Apr 2024 |
| 206 | Aeon Operating, Inc. | Fate, TX 75132 | Oil & Gas Operator | Apr 2024 |
| 207 | Aerie Energy | Cedar Creek, TX 78612 | Oil Operator | Apr 2024 |
| 208 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | Apr 2024 |
| 209 | Aethon I LP | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 210 | Af Operating, LLC | Tuscaloosa, AL 35404 | Oil Operator | Sep 2012 |
| 211 | Afe Oil & Gas Consultants | Addison, TX 75001 | Gas Operator | Jan 2003 |
| 212 | Agape Energy Inc. | San Antonio, TX 78280 | Oil Operator | Apr 2024 |
| 213 | Agate Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2015 |
| 214 | Agave Operating Company, Inc. | Holliday, TX 76366 | Oil Operator | Apr 2024 |
| 215 | Ageron Energy, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2024 |
| 216 | Ageron Ironroc Energy, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Aug 2023 |
| 217 | Aggietech Oil, LTD. | Midland, TX 79701 | Oil & Gas Operator | Aug 2016 |
| 218 | Aghorn Operating, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Apr 2024 |
| 219 | Agp Energy Services LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 220 | Agroil, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Apr 2024 |
| 221 | Ahabb Oil | Luling, TX 78648 | Oil & Gas Operator | Dec 1998 |
| 222 | Aikman Brothers LLC | Amarillo, TX 79109 | Oil & Gas Operator | Jan 2024 |
| 223 | Aikman Oil Corp. | Oklahoma City, OK 73157 | Oil & Gas Operator | Apr 2024 |
| 224 | Aim Consultants Inc. | Rockville, MD 20852 | Oil & Gas Operator | Mar 2008 |
| 225 | Aj'S Pump Truck Service, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2024 |
| 226 | Ajax Resources, LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 227 | Ak Operating Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 228 | Ak Pearson Family Trust | Amarillo, TX 79114 | Oil Operator | Apr 2024 |
| 229 | Akea, Inc. | Holliday, TX 76366 | Oil Operator | Apr 2024 |
| 230 | Akers & Fultz, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2003 |
| 231 | Akers, B. F. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 232 | Akers, Bill | Hebbronville, TX 78361 | Oil & Gas Operator | Aug 2003 |
| 233 | Akg Operating Company | Austin, TX 78701 | Oil & Gas Operator | Apr 2024 |
| 234 | Akins Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 235 | Akma, Inc. | Ore City, TX 75683 | Oil & Gas Operator | Apr 1999 |
| 236 | Alacia Operating Company | Freer, TX 78357 | Oil & Gas Operator | Apr 2024 |
| 237 | Aladdin Energy, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Feb 1999 |
| 238 | Aladdin Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2021 |
| 239 | Alamo Operating Company, L. C. | San Antonio, TX 78278 | Oil & Gas Operator | Aug 2023 |
| 240 | Alamosa Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 241 | Alaron Energy, Inc. | Irving, TX 75038 | Oil & Gas Operator | Apr 2024 |
| 242 | Albany Well Service | Albany, TX 76430 | Oil & Gas Operator | Apr 2024 |
| 243 | Albemarle Corporation | Magnolia, AR 71753 | Oil & Gas Operator | Feb 2024 |
| 244 | Albert, David Oil & Gas | Dallas, TX 75240 | Oil & Gas Operator | Mar 2008 |
| 245 | Albert-Bishop Exploration Co Inc | Dallas, TX 75240 | Oil & Gas Operator | Feb 2007 |
| 246 | Albrecht, Phil A., Jr. | Victoria, TX 77901 | Oil & Gas Operator | Jun 2005 |
| 247 | Alchemist Energy, LLC | Irving, TX 75062 | Oil & Gas Operator | Apr 2024 |
| 248 | Alco DRLG. Co. | Freer, TX 78357 | Oil & Gas Operator | Apr 2024 |
| 249 | Alco Oil & Gas Co. LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2024 |
| 250 | Alcon H2oil LLC | Pecos, TX 79772 | Oil & Gas Operator | Apr 2024 |
| 251 | Alcor Energy, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Apr 2024 |
| 252 | Alcorn Energy, L.L.C. | Woodway, TX 76712 | Oil Operator | Apr 2024 |
| 253 | Alcorn Prod Co. | Victoria, TX 77902 | Oil & Gas Operator | Mar 1997 |
| 254 | Alcorn, Jerry D. | Grand Prairie, TX 75050 | Oil & Gas Operator | Apr 2024 |
| 255 | Alda Oil & Gas Corporation | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2004 |
| 256 | Aldine Oil And Gas, LP | Houston, TX 77060 | Oil & Gas Operator | Apr 2024 |
| 257 | Alegre Energy Operating, LP | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2005 |
| 258 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2024 |
| 259 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 260 | Alexander Resources, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 261 | Alexander Royalty Company | Red Rock, TX 78662 | Oil Operator | Apr 2024 |
| 262 | Alexander, Herbert R. Inc. | Houma, LA 70360 | Oil & Gas Operator | Jun 1998 |
| 263 | Alexander, John | Pearland, TX 77588 | Oil & Gas Operator | Apr 2024 |
| 264 | Alexander, Stanley | Electra, TX 76360 | Oil & Gas Operator | May 2016 |
| 265 | Alexander-Loop Oil Prop. Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Nov 1998 |
| 266 | Alfaro Oil & Gas | Burkburnett, TX 76354 | Oil & Gas Operator | Apr 2024 |
| 267 | Alfaro Production LLC | Burkburnett, TX 76354 | Oil Operator | Apr 2024 |
| 268 | Algoa Operating Company, LLC | Houston, TX 77077 | Oil & Gas Operator | Sep 2002 |
| 269 | Alice-Sidney Oil Co | El Dorado, AR 71730 | Oil & Gas Operator | Feb 1995 |
| 270 | All Am, Inc. | Houston, TX 77057 | Oil & Gas Operator | Feb 2016 |
| 271 | All In Energy Production, LLP | Red Rock, TX 78662 | Oil Operator | Apr 2024 |
| 272 | Allar Co., The | Graham, TX 76450 | Oil & Gas Operator | Dec 2004 |
| 273 | Alleder Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 274 | Allegiance Operating Inc. | Wichita Falls, TX 76307 | Oil Operator | Apr 2024 |
| 275 | Allegiant Resources, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Apr 2024 |
| 276 | Allegro Investments, Inc. | Victoria, TX 77903 | Oil & Gas Operator | Nov 2020 |
| 277 | Allegro Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 278 | Allen & Grace Oil Company | Kingsbury, TX 78638 | Oil & Gas Operator | Jul 1997 |
| 279 | Allen & Shumate, Inc. | Alice, TX 78333 | Oil & Gas Operator | Jan 1996 |
| 280 | Allen Brothers Company | Oil City, LA 71061 | Oil & Gas Operator | Apr 1997 |
| 281 | Allen Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Jun 2016 |
| 282 | Allen, C. L. (Doie) | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 283 | Allen, Mabel F. | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Jul 2002 |
| 284 | Alliance Resources Corporation | Dallas, TX 75367 | Oil & Gas Operator | Apr 2024 |
| 285 | Alliance Resources LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 286 | Allied Energy Operating, LLC | McKinney, TX 75070 | Oil Operator | Apr 2024 |
| 287 | Allied Operating Texas, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 288 | Allied-Gulf Energy, LLC | Lafayette, LA 70508 | Oil & Gas Operator | Apr 2024 |
| 289 | Allison/Hobbs Inc. | Alba, TX 75410 | Oil & Gas Operator | Apr 2024 |
| 290 | Allsop Oil And Gas Company, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Nov 1996 |
| 291 | Alltex Exploration, Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 292 | Alpar Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2011 |
| 293 | Alpha Energy | Anson, TX 79501 | Oil & Gas Operator | Oct 2016 |
| 294 | Alpha Energy Operating LLC | Dallas, TX 75254 | Oil & Gas Operator | Feb 2012 |
| 295 | Alpha Exploration Co. | Wichita Falls, TX 76309 | Oil & Gas Operator | Oct 1998 |
| 296 | Alpha Gamma Onshore, LLC | Midland, TX 79702 | Oil Operator | Apr 2024 |
| 297 | Alpha Oil & Gas LLC | Austin, TX 78734 | Gas Operator | Apr 2024 |
| 298 | Alpha Omega Petroleum, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Mar 1996 |
| 299 | Alpha Petrovision Us Inc | Canada, 00100 | Oil & Gas Operator | May 2013 |
| 300 | Alpine Exploration Co, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Nov 2017 |