| 21601 | Oxxn | Weatherford, TX 76086 | Oil & Gas Operator | Oct 2023 |
| 21602 | Oxy Little Knife, LLC | | Oil & Gas Operator | Jan 2016 |
| 21603 | Oxy Petroleum Inc | | Oil & Gas Operator | Jan 1986 |
| 21604 | Oxy USA | | Oil Operator | Apr 1992 |
| 21605 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 21606 | Oxy USA WTP Limited Partnership | Houston, TX 772104294 | Oil & Gas Operator | Sep 2025 |
| 21607 | Oxy USA WTP LP | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 21608 | Oxyrock Operating, LLC | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 21609 | Oz Gas Corporation | Austin, TX 78746 | Gas Operator | Dec 2025 |
| 21610 | Oz Gas LTD | Tidioute, PA 16351-2648 | Oil & Gas Operator | Dec 2016 |
| 21611 | Ozark Enterprise | | Oil Operator | Nov 1990 |
| 21612 | Ozark Exploration, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Dec 2025 |
| 21613 | Ozark Oil Corporation | Springfield, MO 65804 | Oil & Gas Operator | Oct 1992 |
| 21614 | Ozark Oil LLC | Beallsville, OH 43716 | Oil & Gas Operator | Dec 2024 |
| 21615 | Ozark Production Company, Inc. | | Oil & Gas Operator | Jan 2025 |
| 21616 | Oztx Oil & Gas, L.L.C. | Ozona, TX 76943 | Oil & Gas Operator | Dec 2025 |
| 21617 | Ozzo Corporation, The | Bedford, TX 76021 | Oil Operator | Dec 2025 |
| 21618 | P & A Oilfield Services, Inc. | | Oil & Gas Operator | Jan 1998 |
| 21619 | P & A Operating, Inc. | Kerrville, TX 78028 | Oil & Gas Operator | Dec 2025 |
| 21620 | P & A Well Service | | Oil & Gas Operator | Jan 1994 |
| 21621 | P & C Energy Co | Allegany, NY 14706-9615 | Oil Operator | Dec 2015 |
| 21622 | P & C Oil & Gas, Inc. | Linn, WV 26384 | Oil & Gas Operator | Dec 2021 |
| 21623 | P & C Oil Company | Leona, TX 75850 | Oil & Gas Operator | Sep 2025 |
| 21624 | P & C Petroleum, LLC | Shawnee, KS 66226 | Oil Operator | Apr 2025 |
| 21625 | P & D Valentine Oil Co | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2018 |
| 21626 | P & E Oil | | Oil & Gas Operator | Dec 2024 |
| 21627 | P & H Construction Inc | Wewoka, OK 74884 | Oil & Gas Operator | Jun 2024 |
| 21628 | P & H Oil & Gas Inc | Stroud, OK 74079 | Oil & Gas Operator | Oct 2025 |
| 21629 | P & H Vacuum Service | | Oil & Gas Operator | Jan 2025 |
| 21630 | P & J Resources, Inc | | Oil & Gas Operator | Dec 2013 |
| 21631 | P & M Construction | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 21632 | P & M Drilling Company Inc | Depew, OK 74028 | Oil & Gas Operator | Dec 2004 |
| 21633 | P & M Energy, A General Partnership | Johnson, KS 67855 | Gas Operator | Sep 2003 |
| 21634 | P & M Oil Company | Hays, KS 67601 | Oil & Gas Operator | Sep 2025 |
| 21635 | P & M Petroleum | | Oil Operator | Mar 1998 |
| 21636 | P & M Petroleum Management | Denver, CO BAD ADDR | Oil & Gas Operator | Apr 2010 |
| 21637 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 21638 | P & P Petroleum | Midland, TX 79706 | Oil & Gas Operator | Oct 2002 |
| 21639 | P & P Producing Inc | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 21640 | P & R Oil Company | Post, TX 79356 | Oil & Gas Operator | Dec 2025 |
| 21641 | P & S Energy Inc | Mineral Ridge, OH 44440 | Oil & Gas Operator | Dec 2019 |
| 21642 | P & S Oil And Gas Corporation | | Gas Operator | Dec 1996 |
| 21643 | P & S Production LLC | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2013 |
| 21644 | P & W Oil | Lakewood, CO 80215 | Oil Operator | Sep 1985 |
| 21645 | P & W Well Service Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 21646 | P & WG Resources L.L.C. | Batson, TX 77519 | Oil & Gas Operator | Jan 2011 |
| 21647 | P A Energy Inc | Calvin, OK 74531-0248 | Oil & Gas Operator | Apr 2020 |
| 21648 | P D Parker | | Oil & Gas Operator | Aug 1985 |
| 21649 | P E Trichel | | Gas Operator | May 1980 |
| 21650 | P F Beeler LLC | Norman, OK 73072-7522 | Oil & Gas Operator | Oct 2025 |
| 21651 | P J Oil Co. | | Oil Operator | Jun 2025 |
| 21652 | P K & L Oil Properties | Shawnee, OK 74802-0931 | Oil & Gas Operator | Mar 2001 |
| 21653 | P O & G Panhandle LP | Houston, TX 77057 | Oil & Gas Operator | Aug 2025 |
| 21654 | P P & G Oil | Pickerington, OH 43147 | Oil & Gas Operator | Dec 2024 |
| 21655 | P T C, Inc | Raccoon, KY 41557 | Gas Operator | Dec 2023 |
| 21656 | P T Oil Co Inc | Walters, OK 73572-9505 | Oil Operator | Nov 2014 |
| 21657 | P&F Operations, LLC | Thrall, TX 76578 | Oil Operator | Dec 2025 |
| 21658 | P&H Gas, LLC | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 21659 | P&P Industries, Inc. | Austin, TX 78737 | Oil & Gas Operator | Dec 2002 |
| 21660 | P,B&B Operating Inc. | Coleman, TX 76834 | Oil & Gas Operator | Dec 2025 |
| 21661 | P-2 Exploration Co. | Amarillo, TX 79124 | Oil & Gas Operator | Feb 2005 |
| 21662 | P-2 Exploraton Co Inc | Pampa, TX 79065-2920 | Oil & Gas Operator | Jun 1996 |
| 21663 | P-2 Oil | Vernal, UT 84078 | Oil & Gas Operator | Jul 2000 |
| 21664 | P-K Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Aug 2003 |
| 21665 | P-R-O Management, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 21666 | P-Tex Petroleum, Inc. | Dallas, TX 75238 | Oil & Gas Operator | Nov 1999 |
| 21667 | P. B. Operating Company | | Oil & Gas Operator | Feb 1978 |
| 21668 | P. D. L. Services, Inc. | Minerva, OH 44657 | Oil & Gas Operator | Dec 2024 |
| 21669 | P. G. Oil & Gas, LLC | Clarksburg, WV 26302-2512 | Oil & Gas Operator | Dec 2021 |
| 21670 | P. K. Smith | | Oil Operator | Mar 1997 |
| 21671 | P. L. O. | Boerne, TX 78006 | Oil & Gas Operator | Jun 2016 |
| 21672 | P. R. L. Oil Company | Albany, TX 76430 | Oil & Gas Operator | Apr 2008 |
| 21673 | P. S. & G., Incorporated | | Gas Operator | Aug 1983 |
| 21674 | P.B. Blue Dot Properties | Wexford, PA 15090 | Oil & Gas Operator | Dec 2025 |
| 21675 | P.C.S.I. | | Oil & Gas Operator | Jun 1987 |
| 21676 | P.I.D. Drilling Inc | Clyde, TX 79510 | Oil & Gas Operator | Dec 2025 |
| 21677 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 21678 | P.O.S. Energy, Inc. | Buna, TX 77612 | Oil & Gas Operator | Dec 2025 |
| 21679 | P.R.F. Enterprises, LLC | College Sta, TX 77842 | Oil Operator | Dec 2025 |
| 21680 | P.R.P., Inc. | | Oil & Gas Operator | Sep 2025 |
| 21681 | P.S.N. Petroleum, Inc. | San Antonio, TX 78233 | Oil & Gas Operator | Dec 2025 |
| 21682 | P.T.L. Operating Co. | | Oil Operator | Jun 2003 |
| 21683 | P1 Energy, LLC | Judson, TX 75660 | Oil & Gas Operator | Dec 2025 |
| 21684 | P3 Production | | Oil Operator | Jun 2025 |
| 21685 | P4 Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 21686 | Pa DCNR State Parks Bur | Harrisburg, PA 17105-8551 | Gas Operator | Dec 2024 |
| 21687 | Pa Dep Ofc Oil & Gas MGMT | Harrisburg, PA 17105-8765 | Gas Operator | Dec 1990 |
| 21688 | Pa Gen Energy Co LLC | Warren, PA 16365-2510 | Oil & Gas Operator | Sep 2025 |
| 21689 | Pa Gen Energy Corp | Warren, PA 16365-2510 | Oil & Gas Operator | Dec 2002 |
| 21690 | Pa Land Holdings Corp | Waynesburg, PA 15370-3020 | Oil & Gas Operator | Dec 2011 |
| 21691 | Pa Land Holdings LLC | Waynesburg, PA 15370-3020 | Gas Operator | Dec 2017 |
| 21692 | Pa Mineral SVCS LLC | Indiana, PA 15701 | Oil & Gas Operator | Dec 2024 |
| 21693 | Pa Prod SVC Inc | Indiana, PA 15701-0421 | Oil & Gas Operator | Dec 2024 |
| 21694 | Pa Prospect LLC | Columbus, MT 59019 | Oil & Gas Operator | Jul 2020 |
| 21695 | Pa State Sys Of Higher Ed Indiana Univ | Indiana, PA 15705-0001 | Gas Operator | Dec 2012 |
| 21696 | Pablo Energy II, LLC | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2025 |
| 21697 | Pablo Energy, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2005 |
| 21698 | Pac Drilling LLC | Bolivar, OH 44612 | Oil & Gas Operator | Dec 2024 |
| 21699 | Pace And Ray Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Dec 2025 |
| 21700 | Pace Co/Chas E Hall | Marietta, OH 45750 | Oil & Gas Operator | Dec 1990 |