| 21301 | P.B. Blue Dot Properties | Wexford, PA 15090 | Oil & Gas Operator | Nov 2024 |
| 21302 | P.C.S.I. | | Oil & Gas Operator | Jun 1987 |
| 21303 | P.D.T. Drilling Limited Partnership | St. Albans, WV 25177 | Gas Operator | Dec 2021 |
| 21304 | P.I.D. Drilling Inc | Clyde, TX 79510 | Oil & Gas Operator | Nov 2024 |
| 21305 | P.M. Petroleum | | Oil Operator | Mar 1998 |
| 21306 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2024 |
| 21307 | P.O.S. Energy, Inc. | Buna, TX 77612 | Oil & Gas Operator | Nov 2024 |
| 21308 | P.R.P., Inc. | | Oil & Gas Operator | Aug 2024 |
| 21309 | P.S.N. Petroleum, Inc. | San Antonio, TX 78233 | Oil & Gas Operator | Nov 2024 |
| 21310 | P.T.L. Operating Co. | | Oil Operator | Jun 2003 |
| 21311 | P1 Energy, LLC | Judson, TX 75660 | Oil & Gas Operator | Nov 2024 |
| 21312 | P3 Production | | Oil Operator | Jul 2024 |
| 21313 | P4 Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Nov 2024 |
| 21314 | Pa DCNR State Parks Bur | Harrisburg, PA 17105-8551 | Gas Operator | Dec 2023 |
| 21315 | Pa Dep Ofc Oil & Gas MGMT | Harrisburg, PA 17105-8765 | Gas Operator | Dec 1990 |
| 21316 | Pa Gen Energy Co LLC | Warren, PA 16365-2510 | Oil & Gas Operator | Sep 2024 |
| 21317 | Pa Gen Energy Corp | Warren, PA 16365-2510 | Oil & Gas Operator | Dec 2002 |
| 21318 | Pa Land Holdings Corp | Waynesburg, PA 15370-3020 | Oil & Gas Operator | Dec 2011 |
| 21319 | Pa Land Holdings LLC | Waynesburg, PA 15370-3020 | Gas Operator | Dec 2017 |
| 21320 | Pa Mineral SVCS LLC | Indiana, PA 15701 | Oil & Gas Operator | Dec 2023 |
| 21321 | Pa Prod SVC Inc | Indiana, PA 15701-0421 | Oil & Gas Operator | Dec 2023 |
| 21322 | Pa Prospect LLC | Columbus, MT 59019 | Oil & Gas Operator | Jul 2020 |
| 21323 | Pa State Sys Of Higher Ed Indiana Univ | Indiana, PA 15705-0001 | Gas Operator | Dec 2012 |
| 21324 | Pablo Energy II, LLC | Amarillo, TX 79105 | Oil & Gas Operator | Nov 2024 |
| 21325 | Pablo Energy, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2005 |
| 21326 | Pac Drilling LLC | Bolivar, OH 44612 | Oil & Gas Operator | Dec 2023 |
| 21327 | Pace And Ray Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Nov 2024 |
| 21328 | Pace Co/Chas E Hall | Marietta, OH 45750 | Oil & Gas Operator | Dec 1990 |
| 21329 | Pace Diversified Corporation | | Oil & Gas Operator | Aug 2024 |
| 21330 | Pace Exploration LLC | Tulsa, OK 74133 | Oil & Gas Operator | Sep 2024 |
| 21331 | Pace Oil And Gas Company | Austin, TX 78715 | Oil & Gas Operator | Nov 2024 |
| 21332 | Pace Operating | Abilene, TX 79608 | Oil & Gas Operator | Nov 2024 |
| 21333 | Pace Petroleum Company | Dallas, TX 75206 | Oil & Gas Operator | Nov 2024 |
| 21334 | Pace Royalty Trust Fund, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Nov 2001 |
| 21335 | Pace West Production LC | San Angelo, TX 76904 | Oil & Gas Operator | Sep 1995 |
| 21336 | Pacesetter Energy, Inc. | Flower Mound, TX 75028 | Oil & Gas Operator | May 2008 |
| 21337 | Pacesetter Energy, LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2020 |
| 21338 | Pacific Alliance Medical Center | | Oil Operator | Dec 2007 |
| 21339 | Pacific Atlantic Resources, Inc. | | Oil & Gas Operator | Dec 2021 |
| 21340 | Pacific Coast Energy Company LP | | Oil & Gas Operator | Sep 2024 |
| 21341 | Pacific Energy & Mining Company | Reno, NV 89511 | Oil & Gas Operator | Aug 2020 |
| 21342 | Pacific Energy Resources Inc. | | Oil Operator | Aug 2024 |
| 21343 | Pacific Energy Resources LTD | | Oil & Gas Operator | Sep 2009 |
| 21344 | Pacific Enterprise Oil Co USA | Los Angeles, CA 90071-2005 | Oil & Gas Operator | Aug 2012 |
| 21345 | Pacific Enterprises Oil Co USA | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 21346 | Pacific Enterprises Royalty Co | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 21347 | Pacific Exploration Oper Co, LLC | Houston, TX 77057 | Oil Operator | Nov 2024 |
| 21348 | Pacific Gas And Electric Company | | Gas Operator | Sep 2024 |
| 21349 | Pacific Inland Operating Corporation | | Gas Operator | Dec 1993 |
| 21350 | Pacific Natural Gas Explor | | Oil & Gas Operator | Dec 1974 |
| 21351 | Pacific Operators, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 1999 |
| 21352 | Pacific Palms Petroleum LLC | | Oil & Gas Operator | Sep 2024 |
| 21353 | Pacific Petroleum Technology LLC | | Oil & Gas Operator | Dec 2018 |
| 21354 | Pacific Phoenix Inc | Bartlesville, OK 74005 | Oil & Gas Operator | Jun 1998 |
| 21355 | Pacific Trans Supply | Vernal, UT 84078 | Oil & Gas Operator | Jul 1987 |
| 21356 | Pacific Transmission Supply | | Oil & Gas Operator | Dec 1987 |
| 21357 | Pacific-Atlantic Oil Company, Inc. | | Oil & Gas Operator | Aug 2016 |
| 21358 | Pacific-Northwestern Energy LLC | | Oil Operator | Dec 2022 |
| 21359 | Pack-Man Energy Company | Ranger, TX 76470 | Oil & Gas Operator | Nov 2005 |
| 21360 | Packard Energy LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Jul 2024 |
| 21361 | Packard Gas Company | Irving, TX 75063 | Oil & Gas Operator | Nov 2006 |
| 21362 | Packard, Lynn | Medicine Lodge, KS | Oil & Gas Operator | Mar 2024 |
| 21363 | Pactola Development Co | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2004 |
| 21364 | Pada Petroleum, Inc. | Maple City, KS 67102 | Oil & Gas Operator | Jul 2024 |
| 21365 | Padco LLC | | Oil & Gas Operator | Aug 2024 |
| 21366 | Padgett Oil Inc. | Sedan, KS 67361 | Oil Operator | May 2006 |
| 21367 | Padon, Frank B. Oil Oper., Inc. | Houston, TX 77227 | Oil & Gas Operator | Nov 1998 |
| 21368 | Padre Oil Co. | | Oil & Gas Operator | Aug 2024 |
| 21369 | Page Development, L.L.C. | | Oil Operator | Jun 2024 |
| 21370 | Page Energy | Eldorado, TX 76936 | Oil & Gas Operator | Mar 1997 |
| 21371 | Page Exploration | Midland, TX 79701 | Oil & Gas Operator | Apr 2007 |
| 21372 | Page Lew Barron | | Oil Operator | Dec 2023 |
| 21373 | Page Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2024 |
| 21374 | Page Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2010 |
| 21375 | Page Petroleum Inc | Calgary, AB T2P3M-3000 | Oil & Gas Operator | Nov 1998 |
| 21376 | Page, Allen | | Oil & Gas Operator | Dec 2014 |
| 21377 | Paine Petroleum Company LLC | | Oil Operator | Dec 2013 |
| 21378 | Paint Rock Operating, LLC | San Angelo, TX 76904 | Oil & Gas Operator | Nov 2024 |
| 21379 | Painted Pegasus Petroleum LLC | | Oil & Gas Operator | Jul 2024 |
| 21380 | Painter & McPhail | Bartlesville, OK 74006 | Oil Operator | Sep 1996 |
| 21381 | Painter Oil And Gas LTD. | | Oil & Gas Operator | Jun 1986 |
| 21382 | Painter Oil Comp | | Oil & Gas Operator | Jul 1993 |
| 21383 | Paisano Minerals Company | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Aug 2003 |
| 21384 | Paisano Petroleum, Inc. | San Antonio, TX 78246 | Oil & Gas Operator | Dec 2016 |
| 21385 | Paisano Production, Inc. | Somerset, TX 78069 | Oil Operator | Nov 2024 |
| 21386 | Paiute Oil & Mining Corp | Salt Lake City, UT 84117 | Oil & Gas Operator | Jun 1989 |
| 21387 | Pajaro Energy LLC | Santa Fe, NM 87501 | Oil & Gas Operator | Jan 2024 |
| 21388 | Pak Energy LLC | Calgary, AB T3A-5E8 | Oil Operator | Sep 2022 |
| 21389 | Pal Energy LLC | Guymon, OK 73942-1950 | Gas Operator | Aug 2009 |
| 21390 | Pal Kids Inc | Coronado, CA 92118 | Oil & Gas Operator | Nov 2000 |
| 21391 | Pal LLC | Gillette, WY 82718 | Oil Operator | Dec 2019 |
| 21392 | Palace Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2007 |
| 21393 | Palace Operating Company | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2009 |
| 21394 | Paladar Investments I, L.L.C. | Houston, TX 77090 | Oil & Gas Operator | Feb 2013 |
| 21395 | Paladin Drilling Company | McLeod, TX 75565 | Gas Operator | Sep 2011 |
| 21396 | Paladin Energy Corp. | Dallas, TX 75229 | Oil & Gas Operator | Jul 2017 |
| 21397 | Paladin Energy Partner LLC | Denver, CO 80201 | Oil & Gas Operator | Aug 2006 |
| 21398 | Paladin Energy Partners LLC | | Oil & Gas Operator | Dec 2006 |
| 21399 | Paladin Exploration Co., Inc. | Plano, TX 75093 | Oil & Gas Operator | Feb 1995 |
| 21400 | Paladin Petroleum III, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Nov 2024 |