| 201 | Grayrock Energy II, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Mar 2025 |
| 202 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 203 | Greco Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 204 | Greco Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 205 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 206 | Guffey, Roy, Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Aug 2011 |
| 207 | Gulf South Operators, Inc. | New Orleans, LA 70130 | Oil & Gas Operator | Oct 2015 |
| 208 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 209 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 210 | H&G Petroleum Corporation | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 211 | H-M Resource Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Feb 2023 |
| 212 | Hale Oil & Gas Properties | Graham, TX 76450 | Oil & Gas Operator | Jul 1997 |
| 213 | Halliburton Operating Company | Plano, TX 75093 | Oil & Gas Operator | Mar 2025 |
| 214 | Halvey Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2004 |
| 215 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Mar 2025 |
| 216 | Hanson Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2008 |
| 217 | Harding Company | Dallas, TX 75244 | Oil & Gas Operator | Jan 2015 |
| 218 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 219 | Harwood Exploration, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Aug 1995 |
| 220 | Hastings, J. W. Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2010 |
| 221 | Hawkins, B. O. | Aspermont, TX 79502 | Oil & Gas Operator | Mar 2025 |
| 222 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 223 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 224 | Headington Oil Company, L.P. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2008 |
| 225 | Heights Energy Corporation | Plano, TX 75026 | Oil & Gas Operator | Mar 2025 |
| 226 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 227 | Henderson Petroleum Corp | San Angelo, TX 76906 | Oil & Gas Operator | Jul 2013 |
| 228 | Henry Petroleum Corp. | Midland, TX 79703 | Oil & Gas Operator | Mar 2001 |
| 229 | Henson Exploration, L.P. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2025 |
| 230 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 231 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Mar 2025 |
| 232 | HGN Operating Co Inc | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 233 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 234 | Highmount Expl & Prod Texas LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2014 |
| 235 | Hodges & Hodges Productions | Anson, TX 79501 | Oil & Gas Operator | Aug 2003 |
| 236 | Hofco, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 237 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 238 | Horizon Oil & Gas Co. | Dallas, TX 75221 | Oil & Gas Operator | Jan 2005 |
| 239 | Houghton Oil & Gas, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2009 |
| 240 | Howle Operating Account, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 1999 |
| 241 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Mar 2025 |
| 242 | Hunter Brothers | Wichita Falls, TX 76302 | Oil & Gas Operator | Jul 2007 |
| 243 | Hurst Oil & Gas, Inc. | Hillsboro, TX 76645 | Oil & Gas Operator | Dec 2024 |
| 244 | I.T. Corporation | Arlington, TX 76016 | Oil & Gas Operator | Mar 2025 |
| 245 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 246 | Ipt Oil Company | Evansville, IN 47706 | Oil & Gas Operator | Mar 2025 |
| 247 | Iron Bell Operating, LLC | Lubbock, TX 79423 | Oil Operator | Mar 2025 |
| 248 | J & J Trading | Abilene, TX 79608 | Oil & Gas Operator | Dec 2004 |
| 249 | J & M SWD, LLC | Stamford, TX 79553 | Oil Operator | Mar 2025 |
| 250 | J-E Production, Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2008 |
| 251 | J.F.G. Oil Co. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 252 | Jones, Charles E., Jr. | Odessa, TX 79760 | Oil & Gas Operator | Jul 2013 |
| 253 | Jordan Engineering, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Mar 2025 |
| 254 | Journey Operating, L.L.C. | Sugar Land, TX 77496 | Oil & Gas Operator | Aug 2006 |
| 255 | Joy Resources, Inc. | Houston, TX 77027 | Oil & Gas Operator | Mar 2025 |
| 256 | Jva Operating Company | Midland, TX 79710 | Oil & Gas Operator | Oct 2021 |
| 257 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 258 | Kadane Corporation | Dallas, TX 75205 | Oil & Gas Operator | Mar 2025 |
| 259 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Mar 2025 |
| 260 | Karper Oil & Gas Corporation | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 261 | Kato Operating Company | Bristow, OK 74010 | Oil & Gas Operator | Mar 2015 |
| 262 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Dec 2024 |
| 263 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Jan 2025 |
| 264 | Kestrel Resources, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Jan 2017 |
| 265 | Kimball Production Co. | Houston, TX 77042 | Oil & Gas Operator | Jul 2002 |
| 266 | Kinder Morgan Co2 Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2025 |
| 267 | Kinder Morgan Production Co LLC | Midland, TX 79705 | Oil & Gas Operator | Mar 2025 |
| 268 | Kinder Morgan Production Co LP | Midland, TX 79701 | Oil & Gas Operator | Jul 2007 |
| 269 | Kinlaw Oil Corporation | Dallas, TX 75380 | Oil & Gas Operator | Mar 2025 |
| 270 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Mar 2025 |
| 271 | Klabzuba Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2013 |
| 272 | Klabzuba Royalty Company | Prague, OK 74864-0567 | Oil & Gas Operator | Dec 2019 |
| 273 | KNK Oil & Gas | Abilene, TX 79602 | Oil & Gas Operator | Dec 1996 |
| 274 | Kokomo Energy, Inc. | Gorman, TX 76454 | Oil & Gas Operator | Mar 2025 |
| 275 | Kolb, James | Aspermont, TX 79502 | Oil & Gas Operator | Jul 2003 |
| 276 | Korman Exploration, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2001 |
| 277 | Krocan Energy Corporation | Bowling Green, KY 42102 | Oil & Gas Operator | Mar 2025 |
| 278 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | Mar 2025 |
| 279 | Laguna Petroleum Corporation | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
| 280 | Lainco Well Service | Hamlin, TX 79520 | Oil & Gas Operator | Dec 1996 |
| 281 | Lainco Well Service, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Aug 2011 |
| 282 | Lainco, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Mar 2025 |
| 283 | Laloc | Aspermont, TX 79502 | Oil & Gas Operator | Mar 2025 |
| 284 | Lane Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2025 |
| 285 | Laneer Resources Company | Abilene, TX 79608 | Oil & Gas Operator | Mar 2025 |
| 286 | Lariat Land & Exploration, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2025 |
| 287 | Lawlis Oil Company | Hamlin, TX 79520 | Oil & Gas Operator | Mar 2025 |
| 288 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Mar 2025 |
| 289 | Leclair Operating, L.L.C. | Abilene, TX 79602 | Oil & Gas Operator | Mar 2025 |
| 290 | Leede Oil & Gas Inc. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2003 |
| 291 | Leffel'S, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2020 |
| 292 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Mar 2025 |
| 293 | Lewis Oil And Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 294 | Limark Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2003 |
| 295 | Littlepage, Tommy | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 296 | Lode Holdings, LLC | Wichita Falls, TX 76301 | Oil Operator | Mar 2025 |
| 297 | Lomax Operating Company, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Jun 2011 |
| 298 | Loudon Exploration, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2008 |
| 299 | Lovelady, I. W. | Albuquerque, NM 87111 | Oil & Gas Operator | Jan 1996 |
| 300 | Lowrance & Ray Exploration, Inc. | Fort Worth, TX 76147 | Oil & Gas Operator | Sep 2003 |