| 201 | Gifford Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Jul 2003 |
| 202 | Ginger Petroleum Company, Inc. | La Grange, TX 78945 | Oil & Gas Operator | Mar 2025 |
| 203 | Goodnight Midstream Permian, LLC | Dallas, TX 75206 | Oil & Gas Operator | Mar 2025 |
| 204 | Goodrich Pet. Co. Of Louisiana | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 205 | Goodrich Petroleum Co. II, LLC | Houston, TX 77002 | Oil & Gas Operator | Aug 2002 |
| 206 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 207 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 208 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 209 | Grand Banks Energy Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2025 |
| 210 | Grayrock Corp., The | Dallas, TX 75243 | Oil & Gas Operator | Dec 1999 |
| 211 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 212 | Great Western Onshore Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 213 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Mar 2025 |
| 214 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 215 | Gulfmark Energy Inc | Houston, TX 77027 | Gas Operator | Apr 2023 |
| 216 | H & O Operating Co | Odessa, TX 79764 | Oil & Gas Operator | Mar 2008 |
| 217 | Hadaway Consult And Engineer,LLC | Canadian, TX 79014 | Oil & Gas Operator | Mar 2025 |
| 218 | Hallwood Energy Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2005 |
| 219 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2024 |
| 220 | Halvey Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2004 |
| 221 | Halvey Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 222 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Mar 2025 |
| 223 | Hamon Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2011 |
| 224 | Hanley Petroleum Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2017 |
| 225 | Hannathon Petroleum, LLC | Midland, TX 79705 | Oil & Gas Operator | Mar 2025 |
| 226 | Hanson Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2008 |
| 227 | Harvard Petroleum Corporation | Roswell, NM 88201 | Oil & Gas Operator | Dec 2004 |
| 228 | HCM | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 229 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 230 | Headington Oil Company, L.P. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2008 |
| 231 | Hec Petroleum, Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2006 |
| 232 | Heights Energy Corporation | Plano, TX 75026 | Oil & Gas Operator | Mar 2025 |
| 233 | Henry Petroleum Corp. | Midland, TX 79703 | Oil & Gas Operator | Mar 2001 |
| 234 | Henry Petroleum LP | Midland, TX 79701 | Oil & Gas Operator | Dec 2008 |
| 235 | HGN Operating Co Inc | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 236 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 237 | Hi - Mountain Energy Corporation | Odessa, TX 79762 | Oil & Gas Operator | Mar 2025 |
| 238 | Hibernia Resources IV, LLC | Houston, TX 77056 | Oil & Gas Operator | Mar 2025 |
| 239 | High Mountain Oil & Gas | Hobbs, NM 88240 | Oil & Gas Operator | Jan 2019 |
| 240 | High Mountain Oil & Gas, LLC | Hobbs, NM 88240 | Oil & Gas Operator | Mar 2025 |
| 241 | Hillin Simon/Prime Expl., L.C. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 242 | Hillin-Simon Oil Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2013 |
| 243 | Holly Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 2008 |
| 244 | Honeck Oil Company | Austin, TX 78716 | Oil & Gas Operator | Mar 2008 |
| 245 | Honeck Oil Company, LP | Austin, TX 78716 | Oil & Gas Operator | Dec 2010 |
| 246 | Hopkins, T. M. Operating Co. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2025 |
| 247 | HPC Operating, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Mar 2008 |
| 248 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Mar 2025 |
| 249 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Mar 2025 |
| 250 | HW Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2025 |
| 251 | Ike Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Mar 2025 |
| 252 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 253 | International Western Oil Corp | Weatherford, TX 76086 | Oil & Gas Operator | Mar 2025 |
| 254 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 255 | J-Square Ramsey JV1, LLC | Euless, TX 76039 | Oil Operator | Mar 2025 |
| 256 | Jay Management Company LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 257 | JCR, Jr - Operating, Inc. | Amarillo, TX 79114 | Oil & Gas Operator | Apr 2022 |
| 258 | Jetta Operating Company Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 259 | JM Cox Resources LP | Midland, TX 79702 | Oil & Gas Operator | Apr 2019 |
| 260 | Jo Mill Oil Company LLC | Fort Worth, TX 76132 | Oil & Gas Operator | Mar 2025 |
| 261 | Jones, L. E. Operating, Inc. | Duncan, OK 73534 | Oil & Gas Operator | Mar 2025 |
| 262 | Journey Operating, L.L.C. | Sugar Land, TX 77496 | Oil & Gas Operator | Aug 2006 |
| 263 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Mar 2025 |
| 264 | Katy Resources LLC | Arlington, TX 76016 | Oil & Gas Operator | Mar 2025 |
| 265 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Jan 2025 |
| 266 | Kimbrough Engineering Co, LLC | New Braunfels, TX 78132 | Oil & Gas Operator | Dec 2014 |
| 267 | Kinder Morgan Production Co LP | Midland, TX 79701 | Oil & Gas Operator | Jul 2007 |
| 268 | Kroh Operating LLC | Fort Worth, TX 76114 | Oil & Gas Operator | Mar 2025 |
| 269 | Laguna Petroleum Corporation | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
| 270 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 271 | Landreth, Robert E. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 272 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Mar 2025 |
| 273 | Laron Oil Corporation | Seguin, TX 78155 | Oil & Gas Operator | Jul 1997 |
| 274 | Lavanco Energy, LTD. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2024 |
| 275 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Mar 2025 |
| 276 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 277 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 278 | Limark Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2003 |
| 279 | Linn Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 280 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 281 | Lomak Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1998 |
| 282 | Lone Star Oil & Gas | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 283 | Longhorn Oil Properties, Inc. | Pottsboro, TX 75076 | Oil & Gas Operator | Mar 2025 |
| 284 | Lovelady, I. W. | Albuquerque, NM 87111 | Oil & Gas Operator | Jan 1996 |
| 285 | LPR Energy, LLC | Dallas, TX 75219 | Oil & Gas Operator | Mar 2025 |
| 286 | Lynx Energy Company, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2008 |
| 287 | Magnum Engineering Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2025 |
| 288 | Maguire Oil Company | Dallas, TX 75270 | Oil & Gas Operator | Mar 2015 |
| 289 | Mak-J Energy Partners(TX),LTD. | Denver, CO 80206 | Oil & Gas Operator | Sep 2013 |
| 290 | Mammoth Exploration LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2023 |
| 291 | Manzano LLC | Roswell, NM 88202 | Oil & Gas Operator | Mar 2025 |
| 292 | Maralo, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1998 |
| 293 | Mariner Energy, Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 294 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 295 | Massingill & McCutchin | Lubbock, TX 79424 | Oil & Gas Operator | Aug 2003 |
| 296 | Maverick Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 297 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 298 | McCann Corporation | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 299 | McCullis Resources Co., Inc. | Littleton, CO 80161 | Oil & Gas Operator | Jan 2025 |
| 300 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |