| 21101 | P & R Oil Company | Post, TX 79356 | Oil & Gas Operator | Sep 2026 |
| 21102 | P & S Energy Inc | Mineral Ridge, OH 44440 | Oil & Gas Operator | Dec 2019 |
| 21103 | P & S Oil And Gas Corporation | | Gas Operator | Dec 1996 |
| 21104 | P & S Production LLC | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2013 |
| 21105 | P & W Oil | Lakewood, CO 80215 | Oil Operator | Sep 1985 |
| 21106 | P & W Well Service Inc. | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 21107 | P & WG Resources L.L.C. | Batson, TX 77519 | Oil & Gas Operator | Jan 2011 |
| 21108 | P A Energy Inc | Calvin, OK 74531-0248 | Oil & Gas Operator | Apr 2020 |
| 21109 | P D Parker | | Oil & Gas Operator | Aug 1985 |
| 21110 | P F Beeler LLC | Norman, OK 73072-7522 | Oil & Gas Operator | May 2026 |
| 21111 | P J Oil Co. | | Oil Operator | Apr 2026 |
| 21112 | P K & L Oil Properties | Shawnee, OK 74802-0931 | Oil & Gas Operator | Mar 2001 |
| 21113 | P O & G Panhandle LP | Houston, TX 77057 | Oil & Gas Operator | May 2026 |
| 21114 | P P & G Oil | Pickerington, OH 43147 | Oil & Gas Operator | Dec 2024 |
| 21115 | P T C, Inc | Raccoon, KY 41557 | Gas Operator | Dec 2023 |
| 21116 | P T Oil Co Inc | Walters, OK 73572-9505 | Oil Operator | Nov 2014 |
| 21117 | P&F Operations, LLC | Thrall, TX 76578 | Oil Operator | Sep 2026 |
| 21118 | P&H Gas, LLC | Fredonia, NY 14063 | Gas Operator | Dec 2025 |
| 21119 | P&P Industries, Inc. | Austin, TX 78737 | Oil & Gas Operator | Dec 2002 |
| 21120 | P,B&B Operating Inc. | Coleman, TX 76834 | Oil & Gas Operator | Sep 2026 |
| 21121 | P-2 Exploration Co. | Amarillo, TX 79124 | Oil & Gas Operator | Feb 2005 |
| 21122 | P-2 Exploraton Co Inc | Pampa, TX 79065-2920 | Oil & Gas Operator | Jun 1996 |
| 21123 | P-2 Oil | Vernal, UT 84078 | Oil & Gas Operator | Jul 2000 |
| 21124 | P-K Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Aug 2003 |
| 21125 | P-R-O Management, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2026 |
| 21126 | P-Tex Petroleum, Inc. | Dallas, TX 75238 | Oil & Gas Operator | Nov 1999 |
| 21127 | P. B. Operating Company | | Oil & Gas Operator | Feb 1978 |
| 21128 | P. D. L. Services, Inc. | Minerva, OH 44657 | Oil & Gas Operator | Dec 2024 |
| 21129 | P. G. Oil & Gas, LLC | | Oil & Gas Operator | Dec 2021 |
| 21130 | P. K. Smith | | Oil Operator | Mar 1997 |
| 21131 | P. L. O. | Boerne, TX 78006 | Oil & Gas Operator | Jun 2016 |
| 21132 | P. R. L. Oil Company | Albany, TX 76430 | Oil & Gas Operator | Apr 2008 |
| 21133 | P. S. & G., Incorporated | | Gas Operator | Aug 1983 |
| 21134 | P.B. Blue Dot Properties | Wexford, PA 15090 | Oil & Gas Operator | Sep 2026 |
| 21135 | P.C.S.I. | | Oil & Gas Operator | Jun 1987 |
| 21136 | P.I.D. Drilling Inc | Clyde, TX 79510 | Oil & Gas Operator | Sep 2026 |
| 21137 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Sep 2026 |
| 21138 | P.O.S. Energy, Inc. | Buna, TX 77612 | Oil & Gas Operator | Sep 2026 |
| 21139 | P.R.P., Inc. | | Oil & Gas Operator | Jun 2026 |
| 21140 | P.S.N. Petroleum, Inc. | San Antonio, TX 78233 | Oil & Gas Operator | Sep 2026 |
| 21141 | P.T.L. Operating Co. | | Oil Operator | Jun 2003 |
| 21142 | P1 Energy, LLC | Judson, TX 75660 | Oil & Gas Operator | Sep 2026 |
| 21143 | P3 Production | | Oil Operator | Apr 2026 |
| 21144 | P4 Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2026 |
| 21145 | Pa DCNR State Parks Bur | Harrisburg, PA 17105-8551 | Gas Operator | Dec 2025 |
| 21146 | Pa Dep Ofc Oil & Gas MGMT | Harrisburg, PA 17105-8765 | Gas Operator | Dec 1990 |
| 21147 | Pa Gen Energy Co LLC | Warren, PA 16365-2510 | Oil & Gas Operator | Jun 2026 |
| 21148 | Pa Gen Energy Corp | Warren, PA 16365-2510 | Oil & Gas Operator | Dec 2002 |
| 21149 | Pa Land Holdings Company LLC | | Gas Operator | Dec 2017 |
| 21150 | Pa Land Holdings Corp | | Oil & Gas Operator | Dec 2011 |
| 21151 | Pa Mineral SVCS LLC | Indiana, PA 15701 | Oil & Gas Operator | Dec 2025 |
| 21152 | Pa Prod SVC Inc | Indiana, PA 15701-0421 | Oil & Gas Operator | Dec 2025 |
| 21153 | Pa Prospect LLC | Columbus, MT 59019 | Oil & Gas Operator | Jul 2020 |
| 21154 | Pa State Sys Of Higher Ed Indiana Univ | | Gas Operator | Dec 2012 |
| 21155 | Pablo Energy II, LLC | Amarillo, TX 79105 | Oil & Gas Operator | Jun 2026 |
| 21156 | Pablo Energy, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2005 |
| 21157 | Pac Drilling LLC | Bolivar, OH 44612 | Oil & Gas Operator | Dec 2025 |
| 21158 | Pace And Ray Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Sep 2026 |
| 21159 | Pace Co/Chas E Hall | Marietta, OH 45750 | Oil & Gas Operator | Dec 1990 |
| 21160 | Pace Diversified Corporation | | Oil & Gas Operator | Jun 2026 |
| 21161 | Pace Exploration LLC | Tulsa, OK 74133 | Oil & Gas Operator | Apr 2026 |
| 21162 | Pace Oil And Gas Company | Austin, TX 78715 | Oil & Gas Operator | Sep 2026 |
| 21163 | Pace Operating | Abilene, TX 79608 | Oil & Gas Operator | Sep 2026 |
| 21164 | Pace Petroleum Company | Dallas, TX 75206 | Oil & Gas Operator | Sep 2026 |
| 21165 | Pace Royalty Trust Fund, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Nov 2001 |
| 21166 | Pace West Production LC | San Angelo, TX 76904 | Oil & Gas Operator | Sep 1995 |
| 21167 | Pacesetter Energy, Inc. | Flower Mound, TX 75028 | Oil & Gas Operator | May 2008 |
| 21168 | Pacesetter Energy, LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2020 |
| 21169 | Pacific Alliance Medical Center | | Oil Operator | Dec 2007 |
| 21170 | Pacific Atlantic Oil Co. | | Oil & Gas Operator | Dec 2003 |
| 21171 | Pacific Atlantic Resources, Inc. | | Oil & Gas Operator | Dec 2021 |
| 21172 | Pacific Coast Energy Company LP | | Oil & Gas Operator | Jul 2026 |
| 21173 | Pacific Energy & Mining Company | Reno, NV 89511 | Oil & Gas Operator | Sep 2022 |
| 21174 | Pacific Energy Resources Inc. | | Oil Operator | Dec 2025 |
| 21175 | Pacific Energy Resources LTD | | Oil & Gas Operator | Sep 2009 |
| 21176 | Pacific Enterprise Oil Co USA | Los Angeles, CA 90071-2005 | Oil & Gas Operator | Aug 2012 |
| 21177 | Pacific Enterprises Oil Co USA | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 21178 | Pacific Enterprises Royalty Co | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 21179 | Pacific Exploration Oper Co, LLC | Houston, TX 77057 | Oil Operator | Sep 2026 |
| 21180 | Pacific Gas And Electric Company | | Gas Operator | Jul 2026 |
| 21181 | Pacific Inland Operating Corporation | | Gas Operator | Dec 1993 |
| 21182 | Pacific Natural Gas Explor | | Oil & Gas Operator | Dec 1974 |
| 21183 | Pacific Operators, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 1999 |
| 21184 | Pacific Palms Petroleum LLC | | Oil & Gas Operator | Jul 2026 |
| 21185 | Pacific Petroleum Technology LLC | | Oil & Gas Operator | Dec 2018 |
| 21186 | Pacific Trans Supply | Vernal, UT 84078 | Oil & Gas Operator | Jul 1987 |
| 21187 | Pacific Transmission Supply | | Oil & Gas Operator | Dec 1987 |
| 21188 | Pack-Man Energy Company | Ranger, TX 76470 | Oil & Gas Operator | Nov 2005 |
| 21189 | Packard Energy LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2026 |
| 21190 | Packard Gas Company | Irving, TX 75063 | Oil & Gas Operator | Nov 2006 |
| 21191 | Packard, Lynn | Medicine Lodge, KS | Oil & Gas Operator | Apr 2026 |
| 21192 | Pactola Development Co | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2004 |
| 21193 | Pada Petroleum, Inc. | Maple City, KS 67102 | Oil & Gas Operator | Apr 2026 |
| 21194 | Padco LLC | | Oil & Gas Operator | Mar 2023 |
| 21195 | Padgett Oil Inc. | Sedan, KS 67361 | Oil Operator | May 2006 |
| 21196 | Padon, Frank B. Oil Oper., Inc. | Houston, TX 77227 | Oil & Gas Operator | Nov 1998 |
| 21197 | Padre Oil Co. | | Oil & Gas Operator | Jul 2026 |
| 21198 | Page Development, L.L.C. | | Oil Operator | Dec 2024 |
| 21199 | Page Energy | Eldorado, TX 76936 | Oil & Gas Operator | Mar 1997 |
| 21200 | Page Exploration | Midland, TX 79701 | Oil & Gas Operator | Apr 2007 |