| 601 | Northwest Natural Gas Co | Albion, PA 16401-9998 | Oil & Gas Operator | Dec 1990 |
| 602 | Northwestern Inc | East Brady, PA 16028 | Gas Operator | Dec 2012 |
| 603 | Noumenon Corporation | Core, WV 26541-7072 | Oil & Gas Operator | Dec 2025 |
| 604 | NTS Energy LLC | Indiana, PA 15701-1801 | Oil & Gas Operator | Dec 2015 |
| 605 | Nucomer Energy LLC | Erie, PA 16510 | Oil & Gas Operator | Dec 2025 |
| 606 | Nys Natural Gas Co | Englewood, CO 80111-4737 | Gas Operator | Dec 1984 |
| 607 | Nytis Exploration Company LLC | Lexington, KY 40509 | Oil & Gas Operator | Dec 2021 |
| 608 | Oakes Gas Co Inc | Kane, PA 16735-3905 | Gas Operator | Dec 2023 |
| 609 | Oakmont CC | Oakmont, PA 15139-1135 | Gas Operator | Dec 2024 |
| 610 | Ohio Kentucky Oil Corporation | Lexington, KY 40503 | Oil & Gas Operator | Dec 2023 |
| 611 | Oil & Gas MGMT Inc | Mount Pleasant, PA 15666-3304 | Oil & Gas Operator | Dec 2024 |
| 612 | Oil & Gas SVC Inc | Reelsville, IN 46171-9686 | Gas Operator | Dec 1991 |
| 613 | Oil Creek Operators LLC | Franklin, PA 16323 | Oil Operator | Dec 2025 |
| 614 | Old MTN Gas Co Inc | Pleasantville, PA 16341-0329 | Oil & Gas Operator | Dec 2020 |
| 615 | Olympus Energy, LLC | Canonsburg, PA 15317-7536 | Gas Operator | Jun 2025 |
| 616 | Olympus Prop Inc | Franklin Park, IL 60131-1418 | Oil & Gas Operator | Dec 1997 |
| 617 | Onexxx Prod & Exploration Corp | Jeannette, PA 15644-9691 | Gas Operator | Dec 2025 |
| 618 | Open Flow Gas Supply Corp | Du Bois, PA 15801-2442 | Oil & Gas Operator | Dec 2025 |
| 619 | Otter Exploration Inc | Warren, PA 16365-9689 | Oil & Gas Operator | Dec 2021 |
| 620 | Ows Acquisition Co LLC | Louisville, OH 44641 | Oil & Gas Operator | Dec 2024 |
| 621 | Ows Energy LLC | Carlton, PA 16311-1605 | Oil & Gas Operator | Dec 2025 |
| 622 | Oz Gas LTD | Tidioute, PA 16351-2648 | Oil & Gas Operator | Dec 2016 |
| 623 | P & C Energy Co | Allegany, NY 14706-9615 | Oil Operator | Dec 2015 |
| 624 | Pa DCNR State Parks Bur | Harrisburg, PA 17105-8551 | Gas Operator | Dec 2025 |
| 625 | Pa Dep Ofc Oil & Gas MGMT | Harrisburg, PA 17105-8765 | Gas Operator | Dec 1990 |
| 626 | Pa Gen Energy Co LLC | Warren, PA 16365-2510 | Oil & Gas Operator | Dec 2025 |
| 627 | Pa Gen Energy Corp | Warren, PA 16365-2510 | Oil & Gas Operator | Dec 2002 |
| 628 | Pa Land Holdings Corp | Waynesburg, PA 15370-3020 | Oil & Gas Operator | Dec 2011 |
| 629 | Pa Land Holdings LLC | Waynesburg, PA 15370-3020 | Gas Operator | Dec 2017 |
| 630 | Pa Land Resources LLC Dba P L Resources LLC | Waynesburg, PA 15370 | Gas Operator | Dec 2015 |
| 631 | Pa Mineral SVCS LLC | Indiana, PA 15701 | Oil & Gas Operator | Dec 2025 |
| 632 | Pa Prod SVC Inc | Indiana, PA 15701-0421 | Oil & Gas Operator | Dec 2025 |
| 633 | Pa State Sys Of Higher Ed Indiana Univ | Indiana, PA 15705-0001 | Gas Operator | Dec 2012 |
| 634 | Pan Energy Co Inc | Orchard Park, NY 14127 | Oil & Gas Operator | Dec 2024 |
| 635 | Papesch Robert J | Waterford, PA 16441-4607 | Gas Operator | Dec 2025 |
| 636 | Parker & Parsley Dev LP | Irving, TX 75039-3745 | Oil & Gas Operator | Mar 2015 |
| 637 | Parsons Gas Co Inc | Orbisonia, PA 17243-9506 | Gas Operator | Dec 1991 |
| 638 | Patalon Robert E | Erie, PA 16505-0444 | Gas Operator | Dec 2025 |
| 639 | Patrick Shipley | Indiana, PA 15701-6501 | Oil & Gas Operator | Dec 2016 |
| 640 | Patriot Exploration Corp | Stahlstown, PA 15687-1301 | Oil & Gas Operator | Dec 2025 |
| 641 | Paula M Frost | Bernville, PA 19506-8247 | Gas Operator | Dec 2012 |
| 642 | PDC Mountaineer LLC | Bridgeport, WV 26330-9665 | Oil & Gas Operator | Dec 2017 |
| 643 | Peak Energy LLC | Coffeyville, KS 67337 | Oil & Gas Operator | Sep 2025 |
| 644 | Pecora Enterprises | Bradford, PA 16701-1026 | Oil & Gas Operator | Dec 1999 |
| 645 | Peggy J Bell | Sheffield, PA 16347-0776 | Oil & Gas Operator | Dec 2004 |
| 646 | Pembrooke Oil & Gas Inc | Franklin, PA 16323-7760 | Oil & Gas Operator | Dec 2025 |
| 647 | Pemco Gas Inc | Indian Harbor B, FL 32937 | Oil & Gas Operator | Dec 1997 |
| 648 | Penn VIew Exploration Inc | Blairsville, PA 15717-7961 | Oil & Gas Operator | Dec 2025 |
| 649 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 650 | Penneco Oil Company, Inc. | Delmont, PA 15626-2408 | Oil & Gas Operator | Dec 2025 |
| 651 | Pennenergy Resources LLC | Pittsburgh, PA 15275-1063 | Oil & Gas Operator | Dec 2025 |
| 652 | Pennfield Energy LLC | Erie, PA 16510-4760 | Oil & Gas Operator | Dec 2021 |
| 653 | Pennhills Resources LLC | MT. Jewett, PA 16740 | Oil & Gas Operator | Dec 2025 |
| 654 | Pennzoil Prod Co | Vienna, WV 26105-2141 | Oil & Gas Operator | Dec 2000 |
| 655 | Pentex Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 656 | Peoples Gas Co LLC | Butler, PA 16001-4904 | Oil & Gas Operator | Dec 2005 |
| 657 | Peoples Natural Gas Co LLC | Pittsburgh, PA 15212 | Gas Operator | Dec 2016 |
| 658 | Petro Dev Corp | Bridgeport, WV 26330-0026 | Oil & Gas Operator | Dec 2013 |
| 659 | Petro Evaluation SVC Inc | Wooster, OH 44691-1223 | Oil & Gas Operator | Dec 2008 |
| 660 | Petro North LTD | Smethport, PA 16749-0742 | Oil & Gas Operator | Dec 2025 |
| 661 | Petro SVC Partners Inc | Indiana, PA 15701-8556 | Oil & Gas Operator | Dec 2025 |
| 662 | Petro Ventures Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2019 |
| 663 | Petrobank Opr Co | Denver, CO 80202-4675 | Gas Operator | Dec 1992 |
| 664 | Phillips Exploration Inc | Warrendale, PA 15086 | Oil & Gas Operator | Dec 2012 |
| 665 | Phillips Petro Co | Houston, TX 77251-1967 | Gas Operator | Dec 1985 |
| 666 | Phillips Prod Co | Warrendale, PA 15086-7537 | Oil & Gas Operator | Dec 2011 |
| 667 | Phoenix Energy LLC | Warren, PA 16365-2302 | Oil & Gas Operator | Dec 2025 |
| 668 | Phoenix Energy Prod Inc | Freeport, PA 16229-1126 | Oil & Gas Operator | Dec 2025 |
| 669 | Pierce & Petersen | Warren, PA 16365 | Oil & Gas Operator | Dec 2025 |
| 670 | Pierce James E | Warren, PA 16365-0627 | Oil & Gas Operator | Dec 2011 |
| 671 | Pillar Energy Pa LLC | Charleston, WV 25312-5987 | Oil & Gas Operator | Dec 2025 |
| 672 | Pin Oak Energy Partners LLC | Akron, OH 44311 | Oil & Gas Operator | Dec 2025 |
| 673 | Pine City Gas LLC | Lucinda, PA 16235-0060 | Oil & Gas Operator | Dec 2025 |
| 674 | Pine Ridge Energy | Sugar Grove, PA 16350-6934 | Oil & Gas Operator | Dec 2025 |
| 675 | Pine Valley Resources Inc | West Seneca, NY 14224-2244 | Oil & Gas Operator | Dec 1991 |
| 676 | Plants & Goodwin Inc | Bradford, PA 16701-3733 | Oil & Gas Operator | Dec 2018 |
| 677 | Pleasant Oil & Gas | Clarendon, PA 16313-4532 | Oil & Gas Operator | Dec 2025 |
| 678 | PNB Petrol Haddad & Brooks Inc | Atlanta, GA 30305-1555 | Oil & Gas Operator | Dec 1989 |
| 679 | Port Erie Plastics Inc | Harborcreek, PA 16421-1018 | Gas Operator | Dec 2025 |
| 680 | Porter Gas Inc | Ligonier, PA 15658-0521 | Oil & Gas Operator | Dec 2011 |
| 681 | Portman Acres | Butler, PA 16002-9107 | Gas Operator | Dec 2025 |
| 682 | Potter McKean Resources Inc | Shinglehouse, PA 16748-0527 | Gas Operator | Dec 2003 |
| 683 | Potter McKean Resources Of Pa | Shinglehouse, PA 16748-2631 | Gas Operator | Dec 2007 |
| 684 | Powder Mill Gas Co | New Bethlehem, PA 16242-2252 | Oil & Gas Operator | Dec 2025 |
| 685 | Powell Donovan L | Spraggs, PA 15362-2019 | Gas Operator | Dec 2025 |
| 686 | Power Gas MKT & Trans Inc | Akron, OH 44311-1062 | Oil & Gas Operator | Dec 2008 |
| 687 | PPG Oper LLC | State College, PA 16801-7569 | Gas Operator | Dec 2025 |
| 688 | PPP Future Dev Inc | Alexander, NY 14005 | Oil & Gas Operator | Dec 2025 |
| 689 | Pultorak R A | Waynesburg, PA 15370-2434 | Gas Operator | Dec 2018 |
| 690 | Puma Energy Inc | Kerrville, TX 78028-9300 | Gas Operator | Dec 1999 |
| 691 | Pve Oil Corp Inc | Blairsville, PA 15717-7961 | Oil & Gas Operator | Dec 2025 |
| 692 | Quail Energy Corp | MT Gilead, OH 43338 | Oil & Gas Operator | Dec 2010 |
| 693 | Quaker State Corporation | Houston, TX 77002-2806 | Oil & Gas Operator | Dec 2013 |
| 694 | Querio Enterprises Inc | Leechburg, PA 15656-0553 | Gas Operator | Dec 2012 |
| 695 | Questa Petro Co | Pittsburgh, PA 15241-0863 | Oil & Gas Operator | Dec 2023 |
| 696 | R & N Resources LLC | Bear Lake, PA 16402-2926 | Oil & Gas Operator | Dec 2025 |
| 697 | R & R Oil & Gas LLC | Big Spring, TX 79720 | Oil & Gas Operator | Dec 2024 |
| 698 | R B Robertson & Son Gas & Oil Co LP | New Bethlehem, PA 16242-0190 | Oil & Gas Operator | Dec 2024 |
| 699 | R Harris Gas & Oil Inc | Apollo, PA 15613-9636 | Oil & Gas Operator | Dec 2025 |
| 700 | R Joseph & Shelby J Maney | Warren, PA 16365-3670 | Oil & Gas Operator | Dec 2025 |