| 501 | Norwes Industries, Inc. | | Oil & Gas Operator | Jun 2000 |
| 502 | Noumenon Corporation | Core, WV 26541-7072 | Oil & Gas Operator | Dec 2025 |
| 503 | Nytis Exploration Company LLC | Lexington, KY 40509 | Oil & Gas Operator | Dec 2021 |
| 504 | O'Brien, Mae Or Brett Strickland | Belington, WV 26250-0076 | Oil & Gas Operator | Dec 2021 |
| 505 | Odyssey Petroleum, Inc. | Overland Park, KS 66282 | Oil & Gas Operator | Apr 2009 |
| 506 | Ohio L & M Company Inc | Marietta, OH 45750 | Oil & Gas Operator | Dec 2008 |
| 507 | Oil Rock Oil Company, Inc. | Elizabeth, WV 26143 | Oil & Gas Operator | Dec 2021 |
| 508 | Oiltex, Inc. | Baltimore, MD 21221 | Oil & Gas Operator | Dec 2013 |
| 509 | Okmar Oil Company | Marietta, OH 45750 | Oil & Gas Operator | Jun 2005 |
| 510 | Operator Unknown | Charleston, WV 25304-0000 | Oil & Gas Operator | Dec 2021 |
| 511 | Ows Acquisition Co LLC | Louisville, OH 44641 | Oil & Gas Operator | Dec 2024 |
| 512 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 513 | P & C Oil & Gas, Inc. | Linn, WV 26384 | Oil & Gas Operator | Dec 2021 |
| 514 | P & M Oil Company | Hays, KS 67601 | Oil & Gas Operator | Nov 2025 |
| 515 | P & S Oil And Gas Corporation | | Gas Operator | Dec 1996 |
| 516 | P. D. L. Services, Inc. | Minerva, OH 44657 | Oil & Gas Operator | Dec 2024 |
| 517 | P. G. Oil & Gas, LLC | Clarksburg, WV 26302-2512 | Oil & Gas Operator | Dec 2021 |
| 518 | Pacific Atlantic Resources, Inc. | | Oil & Gas Operator | Dec 2021 |
| 519 | Paleo, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2026 |
| 520 | Panther Creek Mining, LLC | Lexington, KY 40475 | Gas Operator | Dec 2021 |
| 521 | Panther Creek Three LTD Partnership | | Gas Operator | Dec 1996 |
| 522 | Panther LLC | | Gas Operator | Dec 2020 |
| 523 | Parker Gas Company | | Oil & Gas Operator | Aug 2020 |
| 524 | Parker, Denzil L & Emma Louise | Mannington, WV 26582-0188 | Oil & Gas Operator | Dec 2016 |
| 525 | Parks, Lawrence E | Big Bend, WV 26136-0000 | Oil & Gas Operator | Nov 2013 |
| 526 | Parsons Gas Exploration WV, LLC | Pineville, WV 24874 | Gas Operator | Dec 2013 |
| 527 | Patchwork Oil & Gas LLC | Davisville, WV 26142 | Oil & Gas Operator | Dec 2021 |
| 528 | Pauley, Joseph E | Spencer, WV 25276-8719 | Oil & Gas Operator | Dec 2021 |
| 529 | Pauley, Ralph | Sod, WV 25564 | Oil & Gas Operator | Dec 2021 |
| 530 | Paulico Resources, Inc. | Charleston, WV 25301-0000 | Oil & Gas Operator | Dec 2021 |
| 531 | Payne, Robert E | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 532 | PDC Mountaineer LLC | Bridgeport, WV 26330-9665 | Oil & Gas Operator | Dec 2017 |
| 533 | Peake Operating Company | | Oil & Gas Operator | Dec 1999 |
| 534 | Pemco Gas Inc | Indian Harbor B, FL 32937 | Oil & Gas Operator | Dec 1997 |
| 535 | Penn Jersey Oil & Gas Associates | | Oil & Gas Operator | Sep 2016 |
| 536 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 537 | Penn-Ohio Investment Corp. | New Philadelphi, OH 44663 | Oil & Gas Operator | Dec 2004 |
| 538 | Penneco Oil Company, Inc. | Delmont, PA 15626-2408 | Oil & Gas Operator | Dec 2025 |
| 539 | Pentex Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 540 | Pentress Gas LLC | Pentress, WV 26544 | Gas Operator | Dec 2021 |
| 541 | Pepper Development, LLC | Clarksburg, WV 26302 | Oil & Gas Operator | Dec 2021 |
| 542 | Perkins Oil & Gas Inc | Pennsboro, WV 26415-0547 | Oil & Gas Operator | Dec 2021 |
| 543 | Perkins Production Company LLC | Pennsboro, WV 26415 | Oil & Gas Operator | Dec 2021 |
| 544 | Pethtel Oil & Gas | | Oil & Gas Operator | Dec 2005 |
| 545 | Petro Holdings, Inc. | Spencer, WV 25276-0000 | Oil & Gas Operator | Dec 2021 |
| 546 | Petro-Go, Inc. | | Oil & Gas Operator | Mar 1996 |
| 547 | Petro-Mark, Inc. | St Petersburg, FL 33701 | Oil & Gas Operator | Dec 2021 |
| 548 | Petroleum Development Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 549 | Petroleum Resources, LLC | | Oil & Gas Operator | Dec 2021 |
| 550 | Petroleum Service Partners, Inc. | Indiana, PA 15701-0000 | Oil & Gas Operator | Dec 2021 |
| 551 | Piersol Oil & Gas Company | Belpre, OH 45714 | Oil & Gas Operator | Dec 2021 |
| 552 | Pillar Energy, LLC | Charleston, WV 25312-5987 | Oil & Gas Operator | Dec 2024 |
| 553 | Pilot Oil & Gas Corporation | | Gas Operator | Dec 2008 |
| 554 | Pin Oak Operating, LLC | | Gas Operator | Dec 2021 |
| 555 | Pinnacle Mining Company, LLC | | Oil & Gas Operator | Dec 2017 |
| 556 | PMJ, Inc. | Man, WV 25635-0000 | Gas Operator | Dec 2021 |
| 557 | Pocahontas Gas LLC | | Gas Operator | Dec 2021 |
| 558 | Postrock Eastern Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2020 |
| 559 | Powell, Clarence | | Oil & Gas Operator | Sep 2021 |
| 560 | PPG Industries Inc | Barberton, OH 44203 | Oil & Gas Operator | Dec 2004 |
| 561 | Precision Operating, LLC | Bridgeport, WV 26330 | Gas Operator | Dec 2019 |
| 562 | Premma Oil & Gas, LLC | Little Hocking, OH 45742 | Oil & Gas Operator | Dec 2020 |
| 563 | Prenco | Vienna, WV 26105 | Oil & Gas Operator | Dec 2021 |
| 564 | Prime Operating Company | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 565 | Prince Petroleum Company, Inc. | Salem, WV 26426 | Oil & Gas Operator | Dec 2014 |
| 566 | Prior, Ferrell L | | Oil & Gas Operator | Dec 2021 |
| 567 | Priority Production, LLC | | Gas Operator | Dec 2021 |
| 568 | Professional Oilfield Services, Inc. | Byesville, OH 43723 | Oil & Gas Operator | Dec 2021 |
| 569 | Pruitt, Cecil, Jr. | Chantilly, VA 22021-2105 | Oil & Gas Operator | Dec 2014 |
| 570 | Prusack, James | Grantsville, WV 26147-0180 | Oil & Gas Operator | Dec 2021 |
| 571 | Pure Oil Co | | Oil & Gas Operator | Dec 1996 |
| 572 | Putnam, William H | Marietta, OH 45750 | Oil & Gas Operator | Dec 2022 |
| 573 | Quaker State Corporation | Houston, TX 77002-2806 | Oil & Gas Operator | Dec 2013 |
| 574 | Quality Natural Gas, LLC | Allen, KY 41601 | Oil & Gas Operator | Dec 2023 |
| 575 | R & A Production Dba/R Lynch & A Engelke | Creston, WV 26141-7578 | Oil & Gas Operator | Dec 2021 |
| 576 | R & B Petroleum, Inc. | Scarsdale, NY 10583 | Oil & Gas Operator | Dec 2021 |
| 577 | R & R Oil & Gas LLC | Big Spring, TX 79720 | Oil & Gas Operator | Dec 2024 |
| 578 | R. D. Wiles, Inc. | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 579 | Radius Energy Services, LLC | Montevallo, AL 35115 | Oil & Gas Operator | Dec 2021 |
| 580 | Ragsco LLC | Charleston, WV 25314 | Oil & Gas Operator | Dec 2021 |
| 581 | Ramco Energy Corporation | FT. Lauderdale, FL 33312 | Oil & Gas Operator | Dec 2008 |
| 582 | Ramsey Associated Petroleum, Inc. | Glenville, WV 26351-0090 | Oil & Gas Operator | Dec 2021 |
| 583 | Ran Resources, Inc. | Beverly, WV 26253 | Gas Operator | Dec 2021 |
| 584 | Range Resources - Pine Mountain, Inc. | | Oil & Gas Operator | Jan 2011 |
| 585 | Range Resources Appalachia LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Dec 2025 |
| 586 | Rare Earth Minerals, Inc. | | Oil & Gas Operator | Dec 2014 |
| 587 | Raven Ridge Energy, LLC | Charleston, WV 25302 | Oil & Gas Operator | Dec 2021 |
| 588 | Red Gas Company | Weston, WV 26452-0000 | Oil & Gas Operator | Dec 2021 |
| 589 | Red Rock Energy L.L.C. | | Oil & Gas Operator | Dec 2021 |
| 590 | Redco, Inc. | Columbus, OH 43229 | Oil & Gas Operator | Dec 1998 |
| 591 | Reed Gas Inc. | Charleston, WV 25301-0000 | Oil & Gas Operator | Dec 2021 |
| 592 | Reed Gas Joint Venture | Charleston, WV 25302-0000 | Gas Operator | Oct 2021 |
| 593 | Reserve Exploration Co. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2007 |
| 594 | Reserve Oil & Gas, Inc. | Spencer, WV 25276-0000 | Oil & Gas Operator | Dec 2021 |
| 595 | Richards, C W & J E | Vienna, WV 26105-1919 | Gas Operator | Dec 2008 |
| 596 | Riddle, William D | | Oil & Gas Operator | Dec 2021 |
| 597 | Ridgeland Energy, LLC | Pinch, WV 25156 | Oil & Gas Operator | Dec 2021 |
| 598 | Ritchie Petroleum Corporation, Inc. | Pennsboro, WV 26415-0000 | Oil & Gas Operator | Dec 2021 |
| 599 | Roberts, Robert S. Dba K & R Operating Co. | | Gas Operator | Dec 2021 |
| 600 | Rockwell Resources Inc | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2024 |