| 21901 | P. D. L. Services, Inc. | Paris, OH 44669 | Oil & Gas Operator | Dec 2020 |
| 21902 | P. G. Oil & Gas, LLC | Clarksburg, WV 26302-2512 | Oil & Gas Operator | Dec 2021 |
| 21903 | P. K. Smith | | Oil Operator | Mar 1997 |
| 21904 | P. L. O. | Boerne, TX 78006 | Oil & Gas Operator | Jun 2016 |
| 21905 | P. R. L. Oil Company | Albany, TX 76430 | Oil & Gas Operator | Apr 2008 |
| 21906 | P. S. & G., Incorporated | | Gas Operator | Aug 1983 |
| 21907 | P.B. Blue Dot Properties | Wexford, PA 15090 | Oil & Gas Operator | Apr 2025 |
| 21908 | P.C.S.I. | | Oil & Gas Operator | Jun 1987 |
| 21909 | P.D.T. Drilling Limited Partnership | St. Albans, WV 25177 | Gas Operator | Dec 2021 |
| 21910 | P.I.D. Drilling Inc | Clyde, TX 79510 | Oil & Gas Operator | Apr 2025 |
| 21911 | P.M. Petroleum | | Oil Operator | Mar 1998 |
| 21912 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2025 |
| 21913 | P.O.S. Energy, Inc. | Buna, TX 77612 | Oil & Gas Operator | Apr 2025 |
| 21914 | P.R.P., Inc. | | Oil & Gas Operator | Jan 2025 |
| 21915 | P.S.N. Petroleum, Inc. | San Antonio, TX 78233 | Oil & Gas Operator | Apr 2025 |
| 21916 | P.T.L. Operating Co. | | Oil Operator | Jun 2003 |
| 21917 | P1 Energy, LLC | Judson, TX 75660 | Oil & Gas Operator | Apr 2025 |
| 21918 | P3 Production | | Oil Operator | Dec 2024 |
| 21919 | P4 Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 21920 | Pa DCNR State Parks Bur | Harrisburg, PA 17105-8551 | Gas Operator | Dec 2024 |
| 21921 | Pa Dep Ofc Oil & Gas MGMT | Harrisburg, PA 17105-8765 | Gas Operator | Dec 1990 |
| 21922 | Pa Gen Energy Co LLC | Warren, PA 16365-2510 | Oil & Gas Operator | Jan 2025 |
| 21923 | Pa Gen Energy Corp | Warren, PA 16365-2510 | Oil & Gas Operator | Dec 2002 |
| 21924 | Pa Land Holdings Corp | Waynesburg, PA 15370-3020 | Oil & Gas Operator | Dec 2011 |
| 21925 | Pa Land Holdings LLC | Waynesburg, PA 15370-3020 | Gas Operator | Dec 2017 |
| 21926 | Pa Mineral SVCS LLC | Indiana, PA 15701 | Oil & Gas Operator | Dec 2024 |
| 21927 | Pa Prod SVC Inc | Indiana, PA 15701-0421 | Oil & Gas Operator | Dec 2024 |
| 21928 | Pa Prospect LLC | Columbus, MT 59019 | Oil & Gas Operator | Jul 2020 |
| 21929 | Pa State Sys Of Higher Ed Indiana Univ | Indiana, PA 15705-0001 | Gas Operator | Dec 2012 |
| 21930 | Pablo Energy II, LLC | Amarillo, TX 79105 | Oil & Gas Operator | Jan 2025 |
| 21931 | Pablo Energy, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2005 |
| 21932 | Pac Drilling LLC | Bolivar, OH 44612 | Oil & Gas Operator | Dec 2023 |
| 21933 | Pace And Ray Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Apr 2025 |
| 21934 | Pace Co/Chas E Hall | Marietta, OH 45750 | Oil & Gas Operator | Dec 1990 |
| 21935 | Pace Diversified Corporation | | Oil & Gas Operator | Dec 2024 |
| 21936 | Pace Exploration LLC | Tulsa, OK 74133 | Oil & Gas Operator | Jan 2025 |
| 21937 | Pace Oil And Gas Company | Austin, TX 78715 | Oil & Gas Operator | Apr 2025 |
| 21938 | Pace Operating | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 21939 | Pace Petroleum Company | Dallas, TX 75206 | Oil & Gas Operator | Apr 2025 |
| 21940 | Pace Production Co. | San Angelo, TX 76902 | Oil & Gas Operator | Apr 2025 |
| 21941 | Pace Royalty Trust Fund, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Nov 2001 |
| 21942 | Pace West Production LC | San Angelo, TX 76904 | Oil & Gas Operator | Sep 1995 |
| 21943 | Pacer Resources, Inc. | Calgary, AB T3H 3J9 | Gas Operator | Dec 2001 |
| 21944 | Pacesetter Energy, Inc. | Flower Mound, TX 75028 | Oil & Gas Operator | May 2008 |
| 21945 | Pacesetter Energy, LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2020 |
| 21946 | Pacific Alliance Medical Center | | Oil Operator | Dec 2007 |
| 21947 | Pacific Atlantic Oil Co. | | Oil & Gas Operator | Dec 2003 |
| 21948 | Pacific Atlantic Resources, Inc. | | Oil & Gas Operator | Dec 2021 |
| 21949 | Pacific Coast Energy Company LP | | Oil & Gas Operator | Dec 2024 |
| 21950 | Pacific Energy & Mining Company | Reno, NV 89511 | Oil & Gas Operator | Aug 2020 |
| 21951 | Pacific Energy Resources Inc. | | Oil Operator | Dec 2024 |
| 21952 | Pacific Energy Resources LTD | | Oil & Gas Operator | Sep 2009 |
| 21953 | Pacific Enterprise Oil Co USA | Los Angeles, CA 90071-2005 | Oil & Gas Operator | Aug 2012 |
| 21954 | Pacific Enterprises Oil Co USA | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 21955 | Pacific Enterprises Royalty Co | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 21956 | Pacific Exploration Oper Co, LLC | Houston, TX 77057 | Oil Operator | Apr 2025 |
| 21957 | Pacific Gas And Electric Company | | Gas Operator | Dec 2024 |
| 21958 | Pacific Inland Operating Corporation | | Gas Operator | Dec 1993 |
| 21959 | Pacific Natural Gas Explor | | Oil & Gas Operator | Dec 1974 |
| 21960 | Pacific Operators, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 1999 |
| 21961 | Pacific Palms Petroleum LLC | | Oil & Gas Operator | Dec 2024 |
| 21962 | Pacific Petroleum Technology LLC | | Oil & Gas Operator | Dec 2018 |
| 21963 | Pacific Phoenix Inc | Bartlesville, OK 74005 | Oil & Gas Operator | Jun 1998 |
| 21964 | Pacific Trans Supply | Vernal, UT 84078 | Oil & Gas Operator | Jul 1987 |
| 21965 | Pacific Transmission Supply | | Oil & Gas Operator | Dec 1987 |
| 21966 | Pack-Man Energy Company | Ranger, TX 76470 | Oil & Gas Operator | Nov 2005 |
| 21967 | Packard Energy LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Dec 2024 |
| 21968 | Packard Gas Company | Irving, TX 75063 | Oil & Gas Operator | Nov 2006 |
| 21969 | Packard, Lynn | Medicine Lodge, KS | Oil & Gas Operator | Dec 2024 |
| 21970 | Pactola Development Co | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2004 |
| 21971 | Pada Petroleum, Inc. | Maple City, KS 67102 | Oil & Gas Operator | Dec 2024 |
| 21972 | Padco LLC | | Oil & Gas Operator | Feb 2025 |
| 21973 | Padgett Oil Inc. | Sedan, KS 67361 | Oil Operator | May 2006 |
| 21974 | Padon, Frank B. Oil Oper., Inc. | Houston, TX 77227 | Oil & Gas Operator | Nov 1998 |
| 21975 | Padre Oil Co. | | Oil & Gas Operator | Dec 2024 |
| 21976 | Page Development, L.L.C. | | Oil Operator | Dec 2024 |
| 21977 | Page Energy | Eldorado, TX 76936 | Oil & Gas Operator | Mar 1997 |
| 21978 | Page Exploration | Midland, TX 79701 | Oil & Gas Operator | Apr 2007 |
| 21979 | Page Lew Barron | | Oil Operator | Dec 2024 |
| 21980 | Page Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 21981 | Page Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2010 |
| 21982 | Page Petroleum Inc | Calgary, AB T2P3M-3000 | Oil & Gas Operator | Nov 1998 |
| 21983 | Page, Allen | | Oil & Gas Operator | Dec 2014 |
| 21984 | Paine Petroleum Company LLC | | Oil Operator | Dec 2013 |
| 21985 | Paint Rock Operating, LLC | San Angelo, TX 76904 | Oil & Gas Operator | Apr 2025 |
| 21986 | Painted Pegasus Petroleum LLC | | Oil & Gas Operator | Jul 2024 |
| 21987 | Painter & McPhail | Bartlesville, OK 74006 | Oil Operator | Sep 1996 |
| 21988 | Painter Oil And Gas LTD. | | Oil & Gas Operator | Jun 1986 |
| 21989 | Painter Oil Comp | | Oil & Gas Operator | Jul 1993 |
| 21990 | Pairadice Oil & Gas Company LLC | Caldwell, TX 77836 | Oil Operator | Apr 2025 |
| 21991 | Paisano Minerals Company | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Aug 2003 |
| 21992 | Paisano Petroleum, Inc. | San Antonio, TX 78246 | Oil & Gas Operator | Dec 2016 |
| 21993 | Paisano Production, Inc. | Somerset, TX 78069 | Oil Operator | Apr 2025 |
| 21994 | Paiute Oil & Mining Corp | Salt Lake City, UT 84117 | Oil & Gas Operator | Jun 1989 |
| 21995 | Pajaro Energy LLC | Santa Fe, NM 87501 | Oil & Gas Operator | Dec 2023 |
| 21996 | Pak Energy LLC | Calgary, AB T3A-5E8 | Oil Operator | Sep 2022 |
| 21997 | Pal Energy LLC | Guymon, OK 73942-1950 | Gas Operator | Aug 2009 |
| 21998 | Pal Kids Inc | Coronado, CA 92118 | Oil & Gas Operator | Nov 2000 |
| 21999 | Pal LLC | Gillette, WY 82718 | Oil Operator | Dec 2019 |
| 22000 | Palace Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2007 |