| 201 | Fuller Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1995 |
| 202 | Fuller Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 203 | G & F Oil, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Dec 2025 |
| 204 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 205 | Gallo Petroleum, LLC | Colorado City, TX 79512 | Oil Operator | Dec 2025 |
| 206 | Gemini Exploration Company | Dallas, TX 75219 | Oil & Gas Operator | Mar 1997 |
| 207 | Genie Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 208 | GNG Operating LLC | Graham, TX 76450 | Oil Operator | Dec 2025 |
| 209 | Golden Oil And Ranch, LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 210 | Goodrich, John S. | Midland, TX 79705 | Oil & Gas Operator | Sep 1996 |
| 211 | Goodrock Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 212 | Gramrich Oil & Gas Corporation | Coppell, TX 75019 | Oil & Gas Operator | Oct 2012 |
| 213 | Grand Banks Energy Company | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 214 | Grand Energy, Inc. | Dallas, TX 75248 | Oil & Gas Operator | Oct 2002 |
| 215 | Graward Operating, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2025 |
| 216 | Grayrock Energy II, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Dec 2025 |
| 217 | Greasewood Oil Company | Midland, TX 79705 | Oil & Gas Operator | Jul 2007 |
| 218 | Great Texas Crude Inc. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Dec 2025 |
| 219 | Greco Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 220 | Gresham Oil & Gas (USA) Inc. | Littleton, CO 80122 | Oil & Gas Operator | Jan 1999 |
| 221 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 222 | GT Productions | Euless, TX 76040 | Oil & Gas Operator | Jan 1997 |
| 223 | Guffey, Roy, Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Aug 2011 |
| 224 | Guffey, WM. R. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2015 |
| 225 | Gulf South Operators, Inc. | New Orleans, LA 70130 | Oil & Gas Operator | Oct 2015 |
| 226 | Gungoll, Carl E. Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 227 | Guthrie, A. K. Operating Co. | Big Spring, TX 79720 | Oil & Gas Operator | Mar 1996 |
| 228 | H & T Disposal | Abilene, TX 79608 | Oil Operator | Apr 2003 |
| 229 | H.A.N. Operating Incorporated | Clyde, TX 79510 | Oil & Gas Operator | Aug 2016 |
| 230 | Hallwood Energy Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2005 |
| 231 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 232 | Halvey Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2004 |
| 233 | Hamilton Brothers Oil Co. | Houston, TX 77057 | Oil & Gas Operator | Mar 2015 |
| 234 | Hanson Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2008 |
| 235 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 236 | Harvey, Mike W. Oil & Gas | Corpus Chrsti, TX 78408 | Oil & Gas Operator | Aug 2003 |
| 237 | Hastings, J. W. Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2010 |
| 238 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 239 | Hawkins Oil, L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 240 | Heart Land Petroleum Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 241 | Heights Energy Corporation | Plano, TX 75026 | Oil & Gas Operator | Dec 2025 |
| 242 | Hendrix, John H. Corporation | Midland, TX 79705 | Oil & Gas Operator | Sep 2018 |
| 243 | Henson Exploration, L.P. | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 244 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Dec 2025 |
| 245 | HGN Operating Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 246 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 247 | Hi - Mountain Energy Corporation | Odessa, TX 79762 | Oil & Gas Operator | Dec 2025 |
| 248 | Hickman-Jordan-Halligan Ranches | Blackwell, TX 79506 | Oil & Gas Operator | Feb 1998 |
| 249 | Highground, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Dec 2025 |
| 250 | Hill, A G | Dallas, TX 75201 | Oil & Gas Operator | May 2008 |
| 251 | Hill, Albert, Trust | Dallas, TX 75201 | Oil & Gas Operator | May 2008 |
| 252 | Hofco, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 253 | Holden Oil & Gas | Abilene, TX 79608 | Oil & Gas Operator | Dec 2024 |
| 254 | Horizon Well Services, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 255 | Humphrey, Thos.D. Oil Prop.,Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Aug 1999 |
| 256 | Humphrey-Bashford Oil, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Sep 2010 |
| 257 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 258 | Huntwood Resources, LLC | Huntsville, TX 77340 | Oil Operator | Dec 2025 |
| 259 | Hurst Oil & Gas, Inc. | Hillsboro, TX 76645 | Oil & Gas Operator | Dec 2024 |
| 260 | Hyquest Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2015 |
| 261 | Invoil, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2025 |
| 262 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 263 | J J Oil & Gas | Abilene, TX 79608 | Oil & Gas Operator | Mar 2008 |
| 264 | J-E Production, Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2008 |
| 265 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Dec 2025 |
| 266 | J.H. Oil, Inc. (A) | Tuscola, TX 79562 | Oil & Gas Operator | Dec 2004 |
| 267 | J.H.R. Corporation | Bridgeville, PA 15017 | Oil & Gas Operator | Jul 2001 |
| 268 | Jim-Bob Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | Dec 2003 |
| 269 | Jin Petroleum LLC | New Braunfels, TX 78130 | Oil Operator | Dec 2025 |
| 270 | Jva Operating Company | Midland, TX 79710 | Oil & Gas Operator | Oct 2021 |
| 271 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2025 |
| 272 | Katsco Energy, Inc. | Round Rock, TX 78664 | Oil & Gas Operator | Dec 2025 |
| 273 | Keene, Roy J. Jr. | Sugar Land, TX 77498 | Oil & Gas Operator | Jun 2016 |
| 274 | Kelt Oil & Gas, Inc. | Torrance, CA 90503 | Oil & Gas Operator | Dec 2003 |
| 275 | Kennedy & Mitchell, Inc. | Houston, TX 77084 | Oil & Gas Operator | Aug 2013 |
| 276 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Oct 2025 |
| 277 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 278 | Kilmarnock Oil Company, Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Dec 2025 |
| 279 | King Oil & Resources Co | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 280 | Kinlaw Oil Corporation | Dallas, TX 75380 | Oil & Gas Operator | Dec 2025 |
| 281 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2025 |
| 282 | KLM Petroleum Corp. | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 283 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 284 | Ladd Oil & Gas Corporation | Midland, TX 79711 | Oil & Gas Operator | Dec 2021 |
| 285 | Laguna Petroleum Corporation | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 286 | Lainco, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Dec 2025 |
| 287 | Lakeshore Operating, LLC | Wichita, KS 67203 | Oil & Gas Operator | Dec 2025 |
| 288 | Laneer Resources Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 289 | Lariat Land & Exploration, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 290 | Lavanco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2006 |
| 291 | Lavanco Energy, LTD. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2024 |
| 292 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Dec 2025 |
| 293 | Leede Oil & Gas Inc. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2003 |
| 294 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Dec 2025 |
| 295 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Jun 2025 |
| 296 | Lodi Drilling & Service Co. | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Dec 2025 |
| 297 | Lodi Operating Company LLC | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Dec 2025 |
| 298 | Lomak Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1998 |
| 299 | Lone Star Gas Co. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 300 | Lone Star Operations LLC | Lubbock, TX 79401 | Oil & Gas Operator | Dec 2025 |