| 201 | Frio Exploration, L.L.C. | | Gas Operator | Aug 2000 |
| 202 | Fritz Operating Co. | | Oil & Gas Operator | Jun 1990 |
| 203 | Furrh Inc. | | Oil Operator | Apr 1994 |
| 204 | FWF Exploration Inc | | Oil Operator | Oct 1994 |
| 205 | G & G Production LLC | | Gas Operator | Aug 2008 |
| 206 | G & S Oil Company | | Oil & Gas Operator | Dec 2024 |
| 207 | George Tarver Operating Co., LLC | | Oil & Gas Operator | Dec 2024 |
| 208 | Geoterre Operating, L.L.C. | Baton Rouge, LA 70809 | Oil & Gas Operator | Mar 2026 |
| 209 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 210 | Gibraltar Energy Company | | Oil & Gas Operator | Jul 2025 |
| 211 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 212 | Goldsberry, Et Al | | Oil & Gas Operator | Apr 1988 |
| 213 | Grady B. Langston | | Oil & Gas Operator | Jun 1982 |
| 214 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 215 | Griffin & Griffin Expl, LLC | | Oil & Gas Operator | Dec 2025 |
| 216 | Griffin & Griffin Oil Co Inc | | Oil & Gas Operator | Jun 2001 |
| 217 | Griffin & Griffin Oil Co. Inc Et Al | | Oil & Gas Operator | Jan 2010 |
| 218 | Griffith, Wesley | | Oil & Gas Operator | Jun 2000 |
| 219 | GRM LLC | | Oil & Gas Operator | Jun 2021 |
| 220 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 221 | Guaranty Energy Corp. | | Oil & Gas Operator | Aug 1990 |
| 222 | Guernsey Petroleum Corp Of MS | | Oil Operator | Jul 1988 |
| 223 | Guido Production Co Inc | | Oil Operator | May 1995 |
| 224 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 225 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 226 | H & N Operating Co. Inc. | | Oil & Gas Operator | Oct 1997 |
| 227 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 228 | Harkins And Co., Et Al | | Oil & Gas Operator | Dec 1980 |
| 229 | Harmony Producing Co Inc | | Oil & Gas Operator | Dec 1995 |
| 230 | Harrington Oil Inc. | | Oil & Gas Operator | Apr 1978 |
| 231 | Harris & Payne-Randel Drilling | | Oil & Gas Operator | Dec 1989 |
| 232 | Harrison Drilling Co | | Oil & Gas Operator | Mar 1981 |
| 233 | Hassie Hunt Expl. Co. | | Oil & Gas Operator | Aug 2008 |
| 234 | Hawkeye Drilling Co. | Waskom, TX 75692 | Oil & Gas Operator | Feb 2023 |
| 235 | Hayes & Assoc Inc | | Oil & Gas Operator | Oct 1991 |
| 236 | Herlihy John D. | | Oil & Gas Operator | May 1997 |
| 237 | Heron Operating, LLC | | Oil & Gas Operator | Dec 2025 |
| 238 | High Plains Operating Co | | Oil & Gas Operator | Nov 1993 |
| 239 | High-Line Production Services LLC | | Oil & Gas Operator | Sep 2025 |
| 240 | Highmark Energy Operating, LLC | Dallas, TX 75222 | Oil & Gas Operator | Mar 2026 |
| 241 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Mar 2026 |
| 242 | Holleman & Parks Oil & Gas Inc | | Oil & Gas Operator | May 1995 |
| 243 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 244 | Howell Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Oct 2015 |
| 245 | Hughes & Hughes | | Oil & Gas Operator | May 1984 |
| 246 | Hughes & New Oil Co. | | Oil Operator | Jul 1993 |
| 247 | Hughes Eastern Corporation | Ridgeland, MS 39157 | Oil & Gas Operator | Dec 2025 |
| 248 | Humble Oil & Refining Co. | Houston, TX 77252 | Oil & Gas Operator | Jan 2000 |
| 249 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Mar 2026 |
| 250 | Huseman Oil International Inc | | Oil & Gas Operator | Feb 1992 |
| 251 | Indian Exploration, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Mar 2026 |
| 252 | Indrex Inc | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2000 |
| 253 | Industrial Pollution Control | | Oil & Gas Operator | Mar 1985 |
| 254 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 255 | Infield Discovery LLC | Madison, MS 39110 | Oil & Gas Operator | Sep 2025 |
| 256 | Interstate Producing Ser Inc | | Oil & Gas Operator | May 1986 |
| 257 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 258 | Itawamba Industrial Gas Co | | Gas Operator | Dec 1999 |
| 259 | J P Van Way | | Oil & Gas Operator | Dec 2024 |
| 260 | J-B Swabbing Co. | | Oil & Gas Operator | Jun 1984 |
| 261 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Mar 2026 |
| 262 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Mar 2026 |
| 263 | J. R. Pounds, Inc. | Laurel, MS 39441 | Oil & Gas Operator | Dec 2025 |
| 264 | J. Willis Hughes | | Oil & Gas Operator | Sep 1984 |
| 265 | Jack L. Phillips Co. | Gladewater, TX 756471686 | Oil & Gas Operator | Oct 2025 |
| 266 | Jerry P. Ogden | | Oil & Gas Operator | Dec 2008 |
| 267 | Jett Drilling Co. | | Oil & Gas Operator | Feb 1984 |
| 268 | Jetta Operating Company, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2026 |
| 269 | John S. Callon Et Al | | Oil & Gas Operator | Jan 1985 |
| 270 | Jones & Assoc | | Oil & Gas Operator | Sep 1996 |
| 271 | JSG Services, LLC | | Oil & Gas Operator | Sep 2022 |
| 272 | Julius Wactor Oil Co | | Oil & Gas Operator | Jan 1986 |
| 273 | Ka-Lyn Oil & Gas Inc. | | Oil & Gas Operator | Jul 1990 |
| 274 | Kadane & Sons | | Oil & Gas Operator | Sep 2000 |
| 275 | Kaiser Operating, LLC | | Oil & Gas Operator | Dec 2025 |
| 276 | Kay Lease Service | | Oil Operator | Feb 1981 |
| 277 | Kay Operating Co. | | Oil Operator | May 1982 |
| 278 | Kay-Lyn Petroleum Co. | | Oil & Gas Operator | Oct 1989 |
| 279 | KCP Of MS Inc | | Oil & Gas Operator | Jan 1991 |
| 280 | Kelley Industries Inc | Waynesboro, MS 39367 | Oil & Gas Operator | Jul 2005 |
| 281 | Kelly Oil Co Inc | | Oil & Gas Operator | Sep 2013 |
| 282 | Kelso Casing Pulling Of MS Inc | | Oil & Gas Operator | Dec 1993 |
| 283 | Kem Energy Us ,LLC | | Oil & Gas Operator | Dec 2023 |
| 284 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 285 | KFG Petroleum Corporation | | Oil & Gas Operator | Dec 2025 |
| 286 | Kinetic Energy Co., Inc. | | Oil & Gas Operator | Jan 1992 |
| 287 | Kingston Operating Company | | Oil & Gas Operator | Oct 2009 |
| 288 | Kingwood Energy, LLC | | Oil Operator | Feb 2025 |
| 289 | Knight, Wilbur H. Et Al | | Oil & Gas Operator | Jul 1991 |
| 290 | L & B Oil Company Inc | Dallas, TX 75225 | Oil & Gas Operator | Mar 2025 |
| 291 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 292 | Lagniappe Petrole, LLC | | Oil & Gas Operator | Sep 2025 |
| 293 | Lahoma Operating, Inc. | | Oil & Gas Operator | Nov 2025 |
| 294 | Lamar Energy LLC | | Oil & Gas Operator | Dec 2025 |
| 295 | Larco Drilling & Exploration Corp. | | Oil & Gas Operator | Dec 1999 |
| 296 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 297 | Lawson Engineering, Inc. | | Oil & Gas Operator | Dec 1984 |
| 298 | Liberty Operating Company,LLC | | Oil & Gas Operator | Jan 2026 |
| 299 | Liberty Southern Energy LLC | | Oil & Gas Operator | Jan 2014 |
| 300 | Libra Oil Co., Inc. | | Oil & Gas Operator | Nov 1986 |