| 201 | Jan-Mar Oil Company Inc. | | Oil & Gas Operator | Jan 2025 |
| 202 | Jeems Bayou Production Corp. | Oil City, LA 71061 | Oil & Gas Operator | Jul 2025 |
| 203 | Jenkins Oil & Gas, Inc. | | Oil & Gas Operator | Aug 1992 |
| 204 | Jesse Franklin Rosett | | Oil & Gas Operator | Jan 1981 |
| 205 | JLM Sartor Inc | | Oil & Gas Operator | Jul 2016 |
| 206 | John J. Welsh | | Oil & Gas Operator | Dec 2024 |
| 207 | John O. Clay Exploration, Inc. | | Oil & Gas Operator | Apr 2005 |
| 208 | K R S Expl., Inc. | | Oil Operator | Oct 2020 |
| 209 | K W B Oil Property MGMT Inc | | Oil & Gas Operator | Jun 2000 |
| 210 | KCS Resources LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 211 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 212 | Kelley Operating Company, LTD. | | Oil & Gas Operator | Aug 2003 |
| 213 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Apr 2025 |
| 214 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 215 | Kerr-McGee Oil & Gas Onshr LLC | | Oil & Gas Operator | Dec 2005 |
| 216 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2025 |
| 217 | Killingsworth Oil Co. | Longview, TX 75606 | Oil & Gas Operator | Jul 2025 |
| 218 | Koch Gateway Pipeline Company | | Oil & Gas Operator | Feb 2001 |
| 219 | L & L Supply | | Oil Operator | Dec 1994 |
| 220 | L'Oil Operating And MGMT. Co. | | Oil & Gas Operator | Dec 2008 |
| 221 | L.J. Exploration, Inc. | | Oil & Gas Operator | Dec 2020 |
| 222 | Largo Oil Company | Longview, TX 75606 | Oil & Gas Operator | Jul 2025 |
| 223 | Laser Gas Company I, LLC | | Oil Operator | Aug 2007 |
| 224 | Lax, Inc. | | Oil & Gas Operator | Nov 1987 |
| 225 | Lebus Oilfield Service Co | | Oil Operator | Sep 2009 |
| 226 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 227 | Long Trusts, The | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 228 | Louisiana Gas Development Corp | | Oil & Gas Operator | Jan 2025 |
| 229 | Louisiana-Hunt Petroleum Corp. | | Oil & Gas Operator | Dec 1985 |
| 230 | M & M Oil Co., LLC | Oil City, LA 71061 | Oil & Gas Operator | Jul 2025 |
| 231 | M & S Production, Inc. | | Oil Operator | Jul 1994 |
| 232 | Machin & Associates, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jul 2025 |
| 233 | Malone-Killen Oil Expl. Co. | | Oil Operator | Apr 1992 |
| 234 | Mandalay Trading Services Inc. | | Oil Operator | Jul 1999 |
| 235 | Mann Production Co., Inc. | | Oil Operator | Nov 1995 |
| 236 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | May 2025 |
| 237 | Mark L Shidler Inc | Houston, TX 77055 | Oil & Gas Operator | May 2025 |
| 238 | Mark Seifer | | Oil & Gas Operator | Dec 2024 |
| 239 | Marshall Exploration, Inc. | | Oil & Gas Operator | Jun 1992 |
| 240 | Martin Oil & Gas Co. | | Oil Operator | Jul 1981 |
| 241 | Martin Production Company | | Oil & Gas Operator | Dec 2024 |
| 242 | Marvin L. Muslow | | Oil Operator | Jun 1995 |
| 243 | Maximus Operating, LTD. | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 244 | May Petroleum, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Nov 1998 |
| 245 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 246 | McConathy Production Co.,Inc. | | Oil & Gas Operator | Jun 1990 |
| 247 | McEn 1996 Partnership | | Oil & Gas Operator | Sep 1999 |
| 248 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 249 | McKenzie Management Inc. | | Oil & Gas Operator | Aug 1989 |
| 250 | McMullan Oil Company | San Antonio, TX 78212 | Oil & Gas Operator | Jun 2023 |
| 251 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 252 | Menoah Petroleum Inc | | Oil & Gas Operator | Dec 2024 |
| 253 | Mid-South Trading, Inc. | | Oil & Gas Operator | Jan 2025 |
| 254 | Midroc Operating Company | | Oil & Gas Operator | Apr 2013 |
| 255 | Mineral Ventures, Inc. | | Oil & Gas Operator | Dec 2024 |
| 256 | Mobil E&P North America Inc. | | Oil & Gas Operator | Jan 1994 |
| 257 | Mobil Oil E & P Southeast Inc | | Oil & Gas Operator | Sep 2013 |
| 258 | Monterey Resources LLC | Dallas, TX 75230 | Oil & Gas Operator | Oct 2019 |
| 259 | Moon Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Mar 2003 |
| 260 | Moransco Energy Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 261 | MRD Operating LLC | | Oil & Gas Operator | Dec 2016 |
| 262 | N. B. Hunt | | Oil & Gas Operator | May 1981 |
| 263 | Nabors Well Services LTD | Houston, TX 77067-4536 | Oil Operator | Apr 2011 |
| 264 | Nadel & Gussman-Jetta Oper. Co. | | Oil & Gas Operator | Mar 2012 |
| 265 | Nadel And Gussman Ruston, LLC | | Oil & Gas Operator | Dec 2024 |
| 266 | Nebo Operating Company | | Oil & Gas Operator | Apr 1991 |
| 267 | Neilco | | Oil & Gas Operator | Nov 2024 |
| 268 | Nelson Energy, Inc. | | Oil & Gas Operator | Nov 2024 |
| 269 | Nelson Oil & Gas, Inc. | | Oil & Gas Operator | Aug 1995 |
| 270 | NGL Processing, LLC | | Oil Operator | Jun 2000 |
| 271 | Noram Field Services Corp. | | Oil Operator | Apr 1999 |
| 272 | O'Brien Energy Company | Shreveport, LA 71136 | Oil & Gas Operator | Sep 2019 |
| 273 | O'Brien Operating Company | | Oil & Gas Operator | Dec 2004 |
| 274 | O. G., Inc. | | Oil & Gas Operator | Nov 1992 |
| 275 | Occ Operating Co. | | Oil & Gas Operator | Apr 2019 |
| 276 | Onshore Pipeline Const Co Inc | | Oil & Gas Operator | Aug 1998 |
| 277 | Orx Resources, L.L.C. | Houston, TX 77067 | Oil & Gas Operator | Jul 2025 |
| 278 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 279 | Otis C. Coles, Jr. | | Oil & Gas Operator | Jan 1998 |
| 280 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 281 | Ozark Production Company, Inc. | | Oil & Gas Operator | Jan 2025 |
| 282 | Pacific Atlantic Oil Co. | | Oil & Gas Operator | Dec 2003 |
| 283 | Palmer Petroleum Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jul 2025 |
| 284 | Paloma Natural Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 285 | Par Minerals Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2025 |
| 286 | Paragon Resources, Inc | | Oil & Gas Operator | Nov 1991 |
| 287 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 288 | Peoples Energy Prod.-TX, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2007 |
| 289 | Petro Vest, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 2014 |
| 290 | Petro-Chem Operating Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2025 |
| 291 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 292 | Petrocan, Inc. | | Oil & Gas Operator | Apr 1998 |
| 293 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 294 | Petroleum Production MGMT., Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Jul 2025 |
| 295 | Phillips Energy, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2018 |
| 296 | Phillips Lake Corp. | | Oil Operator | Dec 1985 |
| 297 | Phillips Oil Company | Casper, WY 82602 | Oil & Gas Operator | Sep 1986 |
| 298 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 299 | Pine Island Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 300 | Pinnacle Operating Company, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Jul 2025 |