| 201 | Phoenix Opr Co Inc-Oc Yacht 85 | | Oil Operator | Dec 1992 |
| 202 | Phoenix Opr Co Inc-Oc Yacht II | | Oil Operator | Dec 1992 |
| 203 | Phoenix Opr Co Inc-Ocean Yacht | | Oil Operator | Dec 1992 |
| 204 | Phoenix Opr Co Inc-Petrovest | | Oil Operator | Dec 1992 |
| 205 | Phoenix Opr Co Inc-PML | | Oil Operator | Dec 1992 |
| 206 | Phoenix Opr Co Inc-RBF 1985 | | Oil Operator | Dec 1992 |
| 207 | Phoenix Opr Co Inc-Rvside '85 | | Oil Operator | Dec 1992 |
| 208 | Phoenix Opr Co Inc-Salem 1985 | | Oil Operator | Dec 1992 |
| 209 | Phoenix Opr Co Inc-Shemen | | Oil Operator | Dec 1992 |
| 210 | Phoenix Opr Co Inc-TG I | | Oil Operator | Dec 1992 |
| 211 | Phoenix Opr Co Inc-TG II | | Oil Operator | Dec 1992 |
| 212 | Phoenix Opr Co Inc-Vista | | Oil Operator | Dec 1992 |
| 213 | Phoenix Opr Co Inc-York | | Oil Operator | Dec 1992 |
| 214 | Phoenix Resources Co | | Oil & Gas Operator | Jun 1984 |
| 215 | Phoenix-Vi-Roi | | Oil & Gas Operator | Mar 1986 |
| 216 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Feb 2024 |
| 217 | Pie La Operating, LLC | | Oil & Gas Operator | Nov 2023 |
| 218 | Pierce Production Company | Eunice, NM 88231 | Oil & Gas Operator | Oct 2012 |
| 219 | Pilot Resources, Inc. | | Oil & Gas Operator | May 2013 |
| 220 | Pine Island Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 221 | Pine Island Production LLC | | Oil Operator | Jan 2024 |
| 222 | Pine Pipeline, Inc. | | Oil Operator | Dec 1998 |
| 223 | Pine Prairie Oil Co., Inc. | | Oil & Gas Operator | Nov 1983 |
| 224 | Pine Wave Energy Partners Operating, LLC | | Gas Operator | Apr 2022 |
| 225 | Pinnacle Energy, LLC | | Oil & Gas Operator | Jan 2024 |
| 226 | Pinnacle Operating Company, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Apr 2024 |
| 227 | Pintail Minerals Corp. | | Gas Operator | Jun 1992 |
| 228 | Pintail Oil & Gas, LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2019 |
| 229 | Pioneer Exploration Company | Houston, TX 77090 | Oil & Gas Operator | Feb 2024 |
| 230 | Pioneer Exploration, LLC | Houston, TX 77090 | Oil & Gas Operator | Jan 2024 |
| 231 | Pioneer Exploration, LTD. | Houston, TX 77090 | Oil & Gas Operator | Sep 2008 |
| 232 | Pioneer Natural Res. (GPC), Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 1998 |
| 233 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Dec 2023 |
| 234 | Pioneer Prod. Corp. | | Oil & Gas Operator | Jun 1986 |
| 235 | Pioneer Production Corp-Huggs | | Oil & Gas Operator | Jun 1986 |
| 236 | Pioneer Resources Producing, L.P | Irving, TX 75039 | Oil & Gas Operator | Feb 2001 |
| 237 | Pita Oil & Gas, LLC | | Oil Operator | Jul 2004 |
| 238 | Pittencrieff (Gulf Coast), Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 1998 |
| 239 | Pittencrieff America Inc | Abilene, TX 79608 | Oil & Gas Operator | Feb 2003 |
| 240 | Pitts Oil Co-Dallas Prod Inc | | Oil & Gas Operator | Jun 1991 |
| 241 | Placid Oil Co., Et Al | | Oil & Gas Operator | Jun 1983 |
| 242 | Placid Oil Company | Houston, TX 77227 | Oil & Gas Operator | Mar 2008 |
| 243 | Plains Resources Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2008 |
| 244 | Planet Operating, LLC | | Oil & Gas Operator | Dec 2023 |
| 245 | Planet Resource Operating, LLC | | Oil & Gas Operator | Dec 2023 |
| 246 | Plano Corp. | | Oil & Gas Operator | Mar 2005 |
| 247 | Plantation Oil Company | | Oil Operator | Dec 2006 |
| 248 | Plantation Operating, LLC | Houston, TX 77041 | Oil & Gas Operator | Nov 2011 |
| 249 | Platt Oil Production | | Oil & Gas Operator | Jan 2007 |
| 250 | Playa Oil & Gas, LP | | Oil & Gas Operator | Apr 2009 |
| 251 | Pledger West Broussard Operating, LLC | | Oil & Gas Operator | Nov 2023 |
| 252 | Ploutos, LLC | | Oil Operator | May 2021 |
| 253 | Plumb Operating Company, Inc. | | Oil & Gas Operator | Dec 1989 |
| 254 | Plymouth Resource Group LLC | | Oil & Gas Operator | Dec 1999 |
| 255 | Plymouth Resource GRP 1998 LLC | | Oil & Gas Operator | Mar 2000 |
| 256 | Plymouth Resources Group II Inc | | Oil & Gas Operator | May 2007 |
| 257 | Pmo | Garland, TX 75040 | Oil & Gas Operator | Feb 2018 |
| 258 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 259 | Pointe Coupee Energy, Inc | | Oil Operator | Dec 2013 |
| 260 | Polaris Enterprises Inc | Houston, TX 77057 | Oil & Gas Operator | Oct 1998 |
| 261 | Polaris-MRM Production Co. | | Oil Operator | Nov 1985 |
| 262 | Pomfret Production Co., Inc. | | Oil & Gas Operator | Feb 1987 |
| 263 | Pompano Resource Operator LLC | | Oil & Gas Operator | Jan 2024 |
| 264 | Ponderosa Oil & Gas, LLC | Houston, TX 77008 | Oil & Gas Operator | Apr 2024 |
| 265 | Pontchartrain Oil & Gas Corp 2 | | Oil & Gas Operator | Dec 1984 |
| 266 | Pool Company | | Oil Operator | Dec 2002 |
| 267 | Pool Production Services | | Oil Operator | Aug 1990 |
| 268 | Port Hudson Operating Company | | Oil & Gas Operator | Nov 2023 |
| 269 | Post Petroleum Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Aug 2013 |
| 270 | Power Reserves, Inc. | | Oil Operator | Feb 1999 |
| 271 | Poydras Energy Partners, LLC | | Oil & Gas Operator | Dec 2021 |
| 272 | Prairie Producing Company | | Oil & Gas Operator | Dec 1992 |
| 273 | Prayer Oil & Gas Production, LLC | Hallsville, TX 75650 | Oil & Gas Operator | Apr 2024 |
| 274 | Precio Energy, LLC | Beaumont, TX 77726 | Oil & Gas Operator | Apr 2024 |
| 275 | Precision Holdings, LLC | | Oil & Gas Operator | Dec 2015 |
| 276 | Premience Energy LLC | | Oil & Gas Operator | Nov 2023 |
| 277 | Premience Tepetate LLC | | Oil & Gas Operator | Jul 2014 |
| 278 | Premier Natural Resources II,LLC | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2015 |
| 279 | Prentice Oil & Gas Company | | Oil & Gas Operator | Nov 1982 |
| 280 | Presidio Energy, Inc. | | Oil & Gas Operator | Jan 1992 |
| 281 | Presidio Exploration, Inc. | Englewood, CO 80155 | Oil & Gas Operator | May 1999 |
| 282 | Presidio Oil & Gas, Inc. | | Oil & Gas Operator | Dec 2023 |
| 283 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |
| 284 | Pride Exploration, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2015 |
| 285 | Primary Energy Co. | | Gas Operator | Jul 1999 |
| 286 | Primary Fuels Inc | Midland, TX 79701-4410 | Oil & Gas Operator | Mar 1991 |
| 287 | Prime Natural Resources, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jun 2007 |
| 288 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 289 | Prime Rock Resources La LLC | | Oil & Gas Operator | Dec 2023 |
| 290 | Primos Production | | Oil & Gas Operator | Dec 2023 |
| 291 | Primos-Pennzoil JV | | Gas Operator | Feb 2005 |
| 292 | Pritchard Engineering | | Oil & Gas Operator | Mar 1989 |
| 293 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 294 | Probe Offshore, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 295 | Procell & Procell | | Oil & Gas Operator | Jan 2003 |
| 296 | Producers Gas Transmission Inc | | Oil Operator | Nov 2023 |
| 297 | Production Gauging Service Inc | | Oil Operator | Feb 1999 |
| 298 | Production Management Corp. | | Oil & Gas Operator | Jul 1987 |
| 299 | Proex Energy Management, L.L.C. | Spring, TX 77386 | Oil & Gas Operator | Apr 2024 |
| 300 | Professional Petr. Servs, Inc. | | Oil Operator | Oct 2016 |