| 201 | Monroe Well Service-Columbus | | Oil Operator | Dec 1988 |
| 202 | Monroe Well Service-East End | | Oil Operator | Dec 1988 |
| 203 | Monroe Well Service-Energy | | Oil Operator | Dec 1988 |
| 204 | Monroe Well Service-Lexington | | Oil Operator | Feb 1989 |
| 205 | Monroe Well Service-Ocean | | Oil Operator | Feb 1989 |
| 206 | Monroe Well Service-Shemen | | Oil Operator | Dec 1988 |
| 207 | Monroe Well Service-Sla | | Oil Operator | Mar 1989 |
| 208 | Monroe Well Service-SPD 1985 | | Oil Operator | Dec 1988 |
| 209 | Monroe Well Service-TBR | | Oil Operator | Aug 1991 |
| 210 | Monroe Well Service-Tpa 1985 | | Oil Operator | Dec 1990 |
| 211 | Monroe Well Service-York | | Oil Operator | Dec 1988 |
| 212 | Moore&Munger Hydrocarbons Inc | | Oil Operator | May 1987 |
| 213 | Munoco Company | El Dorado, AR 71730 | Oil & Gas Operator | Jul 2021 |
| 214 | Murphrey Oil Company, Inc. | | Oil Operator | Jan 2025 |
| 215 | N. R. Price | | Oil & Gas Operator | Nov 1983 |
| 216 | N. T. Rutledge Oil Co. | | Oil Operator | Jan 1989 |
| 217 | Nadel And Gussman LLC | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2026 |
| 218 | Nadel And Gussman Ruston, LLC | | Oil & Gas Operator | Dec 2024 |
| 219 | Nelson Oil Corporation | | Oil Operator | Jul 1983 |
| 220 | Netco Energy 1 LLC | | Oil Operator | Jan 2025 |
| 221 | New & Brasher Operating | | Oil Operator | Oct 1984 |
| 222 | O'Brien Operating Company | Shreveport, LA 71164 | Oil & Gas Operator | Dec 2004 |
| 223 | O'Malley Production Co Inc. | | Oil & Gas Operator | Mar 1988 |
| 224 | Oakland Corporation | | Oil & Gas Operator | Dec 1981 |
| 225 | Offshore Shelf LLC | | Oil & Gas Operator | Dec 2007 |
| 226 | Oil Palace, Inc. | | Oil Operator | Jun 2016 |
| 227 | Oilwell Acquisition Co | | Oil & Gas Operator | Jun 1999 |
| 228 | Omeara Bros. | | Oil & Gas Operator | Oct 1982 |
| 229 | Osr Oil & Gas Corp | Midland, TX 79710 | Oil & Gas Operator | Dec 2024 |
| 230 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 231 | Page Development, L.L.C. | | Oil Operator | Dec 2024 |
| 232 | Palmetto Oil Co., Inc. | | Oil & Gas Operator | Jan 2025 |
| 233 | Par Minerals Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2026 |
| 234 | Par Oil Corporation | | Oil & Gas Operator | Sep 1990 |
| 235 | Pentagon Petroleum, Inc. | | Oil & Gas Operator | Sep 1991 |
| 236 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 237 | Phillips Oil Company | Casper, WY 82602 | Oil & Gas Operator | Sep 1986 |
| 238 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 239 | Phoenix - Comco, Inc. | | Oil Operator | Aug 2004 |
| 240 | Phoenix Operating Company, Inc. | Shreveport, LA 71161 | Oil & Gas Operator | Mar 2015 |
| 241 | Phoenix Opr Co Inc-DS DRLG | | Oil Operator | May 1994 |
| 242 | Phoenix Opr Co Inc-La Petro As | | Oil Operator | Dec 1992 |
| 243 | Phoenix Opr Co Inc-Lex 83 | | Oil Operator | Feb 1993 |
| 244 | Phoenix Opr Co Inc-New Amer 85 | | Oil Operator | Dec 1992 |
| 245 | Phoenix Opr Co Inc-Shemen | | Oil Operator | Dec 1992 |
| 246 | Phoenix Opr Co Inc-York | | Oil Operator | Dec 1992 |
| 247 | Placid Oil Co., Et Al | | Oil & Gas Operator | Jun 1983 |
| 248 | Placid Oil Company | Houston, TX 77227 | Oil & Gas Operator | Mar 2008 |
| 249 | Pryme Energy, LLC | | Oil & Gas Operator | Feb 2015 |
| 250 | Pyramid Petroleum, Inc.-La Div | | Oil Operator | Jun 1997 |
| 251 | Q. F. Sagdahl | | Oil Operator | Feb 2019 |
| 252 | Quantum Resources MGMT, LLC | | Oil & Gas Operator | Nov 2014 |
| 253 | Quiet Sun Investments, Inc. | | Oil & Gas Operator | Sep 2012 |
| 254 | R C Henderson Jr | | Oil Operator | Dec 1990 |
| 255 | Rabb Contracting Company, L.L.C. | | Oil Operator | Nov 2024 |
| 256 | Rabun Resources | | Gas Operator | Jan 2025 |
| 257 | Ransom Horne,Jr. | | Oil & Gas Operator | Dec 1991 |
| 258 | Ray Energy, LLC | | Oil Operator | Jan 2025 |
| 259 | Refined Products, Inc. | Beaumont, TX 77705 | Oil Operator | Apr 2026 |
| 260 | Reliance Petroleum Corporation | | Oil & Gas Operator | Oct 2018 |
| 261 | Reliance Trusts | Dallas, TX 75244 | Oil & Gas Operator | Nov 1995 |
| 262 | RLS Partnership | | Oil Operator | Apr 1983 |
| 263 | Robert E McDowell | | Oil Operator | Dec 1998 |
| 264 | Ross Production Co. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2000 |
| 265 | Russell A. Flowers | | Oil Operator | May 1995 |
| 266 | Ryca Energy Partners LLC | | Oil Operator | Nov 2024 |
| 267 | Ryca Energy, LLC | | Oil & Gas Operator | Mar 2015 |
| 268 | S S M Partnership | | Oil & Gas Operator | Jul 1992 |
| 269 | S&S Williams Inc | | Oil Operator | May 2004 |
| 270 | S.H. Loe Oil Corp. | | Oil & Gas Operator | Jan 2025 |
| 271 | Sam Spears, Jr. | | Oil & Gas Operator | Sep 1998 |
| 272 | Sanchez Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | Apr 2026 |
| 273 | Sasha Petroleum, Inc | | Oil Operator | Jan 1986 |
| 274 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 275 | Secan Oil Co Inc | | Oil & Gas Operator | May 1987 |
| 276 | Senior G&A Operating Co Inc | | Oil & Gas Operator | Nov 1991 |
| 277 | Shannon Williams | | Oil Operator | Jan 1993 |
| 278 | Shelby H. Loe, SR. Oil Co. | | Oil Operator | Jul 1989 |
| 279 | Shoreline GP LLC | | Oil & Gas Operator | Jun 2012 |
| 280 | Signal Operating L.L.C. | | Oil Operator | Jan 2025 |
| 281 | Skyhawk Energy, LLC | | Oil Operator | Dec 2024 |
| 282 | Sleeth And Brooks Oil Co. | | Oil Operator | Jul 1989 |
| 283 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 284 | Smith-Wentworth | | Oil & Gas Operator | Sep 1983 |
| 285 | Sola Operating, LLC | Trout, LA 71371 | Oil Operator | Apr 2026 |
| 286 | Son-Dad Oil & Gas | | Oil & Gas Operator | Dec 1994 |
| 287 | Sonny King | | Oil & Gas Operator | Jan 2025 |
| 288 | Sonny King Production | | Oil & Gas Operator | Jan 2025 |
| 289 | Spirit Petroleum Company | | Oil & Gas Operator | Apr 1999 |
| 290 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 291 | Stenco | | Oil & Gas Operator | Apr 1994 |
| 292 | SW Associates | | Oil & Gas Operator | Dec 1985 |
| 293 | T. C. Morrow Oil Co. | | Oil & Gas Operator | Apr 1991 |
| 294 | T. L. James & Co., Inc. | | Oil & Gas Operator | Oct 1992 |
| 295 | TDX Energy, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 296 | Tensas Delta Expl Co., LLC | Shreveport, LA 71101-5323 | Oil & Gas Operator | Jul 2021 |
| 297 | Tensas Delta Land Company | | Oil & Gas Operator | Apr 2002 |
| 298 | Texas Petroleum Investment Company | Houston, TX 77057 | Oil & Gas Operator | Apr 2026 |
| 299 | Thomas Bell | | Oil Operator | Dec 1985 |
| 300 | Thomas G. Easterling | | Oil Operator | Jun 1989 |