| 201 | J. D. Ward Oil Company | | Oil Operator | Oct 2002 |
| 202 | J. E. Baker | | Oil Operator | Dec 1998 |
| 203 | J. E. Farrell | | Gas Operator | Nov 1990 |
| 204 | J. E. Hughes | | Oil & Gas Operator | Jan 1987 |
| 205 | J. E. Parker | | Oil Operator | Nov 1991 |
| 206 | J. F. G. Enterprises | Artesia, NM 88210 | Oil & Gas Operator | Apr 1995 |
| 207 | J. F. Shelby Operating Agency | | Oil & Gas Operator | Nov 1986 |
| 208 | J. G. Floyd | | Oil Operator | Jun 1985 |
| 209 | J. G. Sutton Oil Co., Inc. | | Oil Operator | Mar 1988 |
| 210 | J. H. Wilkins | | Gas Operator | Dec 2024 |
| 211 | J. Herrick Pro | | Oil Operator | Sep 2025 |
| 212 | J. Hus Hawkins | | Oil & Gas Operator | Feb 1989 |
| 213 | J. I. Hathaway Opr. | | Oil & Gas Operator | Dec 1988 |
| 214 | J. K. Brown, Inc. | Littleton, CO 80161 | Gas Operator | Dec 2019 |
| 215 | J. K. J. Company | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 216 | J. Kirin Oil & Gas LLC | | Oil Operator | Aug 2024 |
| 217 | J. L. Shoalmire | | Oil & Gas Operator | Dec 2006 |
| 218 | J. L. Davis | | Oil & Gas Operator | Dec 1985 |
| 219 | J. L. Dews | | Oil Operator | Jan 2025 |
| 220 | J. M. Huber Corp. | Houston, TX 77079 | Oil & Gas Operator | Sep 2004 |
| 221 | J. M. Peters Co. Inc. | | Oil & Gas Operator | Dec 1990 |
| 222 | J. M. Teutsch, Inc. | | Oil Operator | Feb 1998 |
| 223 | J. M. Van Horn Operator | | Oil Operator | Dec 1989 |
| 224 | J. O. Kimbrell, Jr. | | Oil & Gas Operator | Dec 1992 |
| 225 | J. P. Boyter | | Oil Operator | Dec 2024 |
| 226 | J. P. Boyter, Et Al | | Oil Operator | Jun 1993 |
| 227 | J. P. M. Investments, LTD. | | Oil & Gas Operator | Sep 1988 |
| 228 | J. P. Owen & Co. Inc. | | Oil & Gas Operator | Feb 1991 |
| 229 | J. P. Van Way, SR. | | Oil Operator | Dec 1989 |
| 230 | J. Pryor Lester, Jr. | | Oil Operator | Mar 1990 |
| 231 | J. R. Pounds, Inc. | Laurel, MS 39441 | Oil & Gas Operator | Oct 2025 |
| 232 | J. Rodney Fontenot | | Oil & Gas Operator | Jul 2011 |
| 233 | J. S. Blanton | | Oil Operator | May 1986 |
| 234 | J. T. Bierden, Jr. | | Oil Operator | Feb 1993 |
| 235 | J. V. Wynn | | Oil & Gas Operator | Dec 1991 |
| 236 | J. W. Bailey | | Oil Operator | Dec 1991 |
| 237 | J. W. Burton | | Oil & Gas Operator | Jul 1990 |
| 238 | J. W. Oil | | Oil Operator | Sep 2025 |
| 239 | J. W. Resources Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Dec 2025 |
| 240 | J. Willis Hughes | | Oil & Gas Operator | Sep 1984 |
| 241 | J.A. Seglund,Inc. | | Oil & Gas Operator | May 1982 |
| 242 | J.A.G. Oil & Gas | La Vernia, TX 78121 | Oil & Gas Operator | Dec 2025 |
| 243 | J.A.M. Production | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 244 | J.B. Exploration | Cactus, TX 79013 | Oil & Gas Operator | Sep 1997 |
| 245 | J.C. Operating | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2016 |
| 246 | J.C.L. Production, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 2025 |
| 247 | J.D. Pittman Operating LLC | Edmond, OK 73025 | Oil & Gas Operator | Oct 2025 |
| 248 | J.E.B. Oil Research, Inc. | Neodesha, KS 66757 | Gas Operator | Sep 2003 |
| 249 | J.E.R. Production Inc. | Flower Mound, TX 75028 | Gas Operator | Apr 2005 |
| 250 | J.F.G. Oil Co. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 251 | J.F.S. Production Co., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 1995 |
| 252 | J.F.W. Equipment, Inc. | Centerville, TX 75833 | Oil & Gas Operator | Dec 2025 |
| 253 | J.H. Oil, Inc. (A) | Tuscola, TX 79562 | Oil & Gas Operator | Dec 2004 |
| 254 | J.H. R., Inc. | Bridgeville, PA 15017 | Oil Operator | Jan 2013 |
| 255 | J.H.R. Corporation | Bridgeville, PA 15017 | Oil & Gas Operator | Jul 2001 |
| 256 | J.J. Bunkirt Oil & Gas Corp. | Powell, WY 82435 | Oil & Gas Operator | Aug 2020 |
| 257 | J.J. Energy Company | Richardson, TX 75081 | Oil & Gas Operator | Dec 2025 |
| 258 | J.L.H. Enterprises, Inc. | | Oil & Gas Operator | Mar 1989 |
| 259 | J.M. Oil L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 260 | J.M.Huber Corp., & Kerr-McGee | | Oil & Gas Operator | Aug 1984 |
| 261 | J.P. Oil Company LLC | | Oil & Gas Operator | Oct 2025 |
| 262 | J.P. Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 263 | J.R. Oil And Gas Inc. | Alvin, TX 77511 | Oil & Gas Operator | Dec 2025 |
| 264 | J.R. Oil Company | Houston, TX 77007 | Oil & Gas Operator | Jul 2019 |
| 265 | J.R. Oil Productions | | Oil Operator | Jul 2019 |
| 266 | J.R. Vann | | Oil & Gas Operator | Dec 1979 |
| 267 | J.R.W. Oil & Gas | | Gas Operator | Sep 2021 |
| 268 | J.S. & S. Production, L.L.C. | | Oil Operator | Apr 2021 |
| 269 | J.S.B. Oil Company | Hallettsville, TX 77964 | Oil & Gas Operator | Dec 2025 |
| 270 | J.T. Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Sep 2018 |
| 271 | J.W. Briggs & W.B. Briggs | | Oil Operator | Jul 1994 |
| 272 | J.W. Service Company | Smithville, TX 78957 | Oil & Gas Operator | Dec 2025 |
| 273 | J.W.S. | Talpa, TX 76882 | Oil & Gas Operator | Dec 2025 |
| 274 | J/A Productions LLC | Kellyville, OK 74039-0544 | Oil Operator | Oct 2025 |
| 275 | J2R Energy, LLC | Houston, TX 77084 | Oil Operator | Dec 2025 |
| 276 | J3 Energy | Purcell, OK 73080 | Oil & Gas Operator | Sep 2003 |
| 277 | J3 Energy LLC | Ada, OK 74820 | Oil Operator | Oct 2025 |
| 278 | J6 Operating, LLC | Shiner, TX 77984 | Oil Operator | Mar 2009 |
| 279 | Jab Enterprises Inc | Erie, PA 16510-2181 | Gas Operator | Dec 2009 |
| 280 | Jab Operating, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2008 |
| 281 | Jabsco Oil Operating, LLC | Tuscaloosa, AL 35401 | Oil & Gas Operator | Sep 2025 |
| 282 | Jac Producing Co | Skellytown, TX 79080 | Gas Operator | May 2014 |
| 283 | Jac-Mac Energy Corporation | Oklahoma City, OK 73170 | Oil & Gas Operator | Nov 2025 |
| 284 | Jacat Oil Co. | | Oil Operator | Dec 1990 |
| 285 | Jack A Cole | Farmington, NM 874990191 | Oil & Gas Operator | Mar 1995 |
| 286 | Jack Co | Indiana, PA 15701-0697 | Oil & Gas Operator | Dec 2013 |
| 287 | Jack Corman | | Oil & Gas Operator | Jul 1981 |
| 288 | Jack D Knox | Dallas, TX 75219 | Oil Operator | Jun 2024 |
| 289 | Jack E. Stack, Jr. | | Oil & Gas Operator | Aug 1996 |
| 290 | Jack Exploration Inc | Sulphur, OK 73086 | Oil & Gas Operator | Oct 2017 |
| 291 | Jack Huff | Midland, TX 79705 | Oil & Gas Operator | Nov 2025 |
| 292 | Jack J. Grynberg | Denver, CO 80202 | Oil & Gas Operator | Oct 2019 |
| 293 | Jack L. Phillips | | Oil & Gas Operator | Aug 1994 |
| 294 | Jack L. Phillips Co. | Gladewater, TX 756471686 | Oil & Gas Operator | Oct 2025 |
| 295 | Jack Latham Co. | | Oil & Gas Operator | Jun 2018 |
| 296 | Jack Markham | Lubbock, TX 79401 | Oil & Gas Operator | Dec 2015 |
| 297 | Jack Moran Oil Co | Martinsburg, OH 43037 | Oil & Gas Operator | Dec 2009 |
| 298 | Jack Oil Company | Baird, TX 79504 | Oil & Gas Operator | Apr 1994 |
| 299 | Jack Oil Company L.L.C. | Duncan, OK 73533 | Oil & Gas Operator | Oct 2025 |
| 300 | Jack Production Inc | Indiana, PA 15701-0697 | Oil & Gas Operator | Dec 2011 |