| 501 | Mountain State Well Tending | Hurricane, WV 25526-0000 | Oil & Gas Operator | Dec 2021 |
| 502 | Mountain V Oil & Gas, Inc. | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 503 | Mountain V, LLC | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 504 | Mountaineer Gas Transmission, Inc. | Fort Worth, TX 76185-0000 | Oil & Gas Operator | Dec 2021 |
| 505 | Mountaineer State Energy, Inc. | Dallas, TX 75234 | Oil & Gas Operator | Dec 2021 |
| 506 | Mountaineer State Operations, LLC | Sandyville, WV 25275 | Oil & Gas Operator | Dec 2023 |
| 507 | Mountaineer Trading Company, LLC | Charleston, WV 25314 | Oil & Gas Operator | Dec 2016 |
| 508 | Mud River Gas Co | | Gas Operator | Dec 2021 |
| 509 | Mullen Resources LLC | Reedy, WV 25270 | Oil & Gas Operator | Dec 2021 |
| 510 | Mumma Oil Production Co., Inc. | Allentown, PA 18109-0000 | Oil & Gas Operator | Dec 2019 |
| 511 | Murray Hill Energy, Inc. | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2017 |
| 512 | Murvin & Meier Oil Co. | | Oil & Gas Operator | Dec 2020 |
| 513 | Mutschelknaus, Clarence W | Salem, WV 26426-0351 | Oil & Gas Operator | Dec 2021 |
| 514 | Mutual Oil & Gas Co | Akron, OH 44313 | Oil & Gas Operator | Dec 2001 |
| 515 | Myers & Hicks Gas Co | | Gas Operator | Dec 2021 |
| 516 | Myers Drilling Company | Barboursville, WV 25504 | Oil & Gas Operator | Dec 2023 |
| 517 | Nanco Resources, LLC | | Gas Operator | Dec 2021 |
| 518 | Nashville Associates Inc | | Oil & Gas Operator | Dec 2003 |
| 519 | NCL Natural Resources LLC | Spring, TX 77381-5261-5261 | Oil & Gas Operator | Dec 2017 |
| 520 | Neely, Steven A. | | Gas Operator | Dec 2021 |
| 521 | Nesler, Charles E. | | Oil & Gas Operator | Dec 2020 |
| 522 | Nester, Holly, Inc. | | Gas Operator | Dec 2021 |
| 523 | New River Energy Corporation | | Gas Operator | Dec 2017 |
| 524 | Night Owl Well Service | Cairo, WV 26337-0000 | Oil & Gas Operator | Dec 2021 |
| 525 | Nitro Energy, Inc. | | Gas Operator | Dec 2005 |
| 526 | Nne Resources LLC | Charleston, WV 25301 | Oil & Gas Operator | Dec 2021 |
| 527 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 528 | Northeast Natural Energy LLC | Charleston, WV 25301-2719 | Oil & Gas Operator | Jan 2025 |
| 529 | Northport Production Company | Oklahoma City, OK 73113 | Oil & Gas Operator | Jan 2025 |
| 530 | Northstar Energy Corporation | Charleston, WV 25337-0000 | Oil & Gas Operator | Dec 2021 |
| 531 | Norwes Industries, Inc. | | Oil & Gas Operator | Jun 2000 |
| 532 | Noumenon Corporation | Core, WV 26541-7072 | Oil & Gas Operator | Dec 2024 |
| 533 | Nytis Exploration Company LLC | Lexington, KY 40509 | Oil & Gas Operator | Dec 2021 |
| 534 | O'Brien, Mae Or Brett Strickland | Belington, WV 26250-0076 | Oil & Gas Operator | Dec 2021 |
| 535 | Odyssey Petroleum, Inc. | Overland Park, KS 66282 | Oil & Gas Operator | Apr 2009 |
| 536 | Ohio L & M Company Inc | Marietta, OH 45750 | Oil & Gas Operator | Dec 2008 |
| 537 | Oil Rock Oil Company, Inc. | Elizabeth, WV 26143 | Oil & Gas Operator | Dec 2021 |
| 538 | Oiltex, Inc. | Baltimore, MD 21221 | Oil & Gas Operator | Dec 2013 |
| 539 | Okmar Oil Company | Marietta, OH 45750 | Oil & Gas Operator | Jun 2005 |
| 540 | Olive Oil & Gas | Ellensboro, WV 26346 | Oil & Gas Operator | Dec 2021 |
| 541 | Operator Unknown | Charleston, WV 25304-0000 | Oil & Gas Operator | Dec 2021 |
| 542 | Ows Acquisition Co LLC | Louisville, OH 44641 | Oil & Gas Operator | Dec 2024 |
| 543 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
| 544 | P & C Oil & Gas, Inc. | Linn, WV 26384 | Oil & Gas Operator | Dec 2021 |
| 545 | P & M Oil Company | Hays, KS 67601 | Oil & Gas Operator | Dec 2024 |
| 546 | P & S Oil And Gas Corporation | | Gas Operator | Dec 1996 |
| 547 | P. D. L. Services, Inc. | Paris, OH 44669 | Oil & Gas Operator | Dec 2020 |
| 548 | P. G. Oil & Gas, LLC | Clarksburg, WV 26302-2512 | Oil & Gas Operator | Dec 2021 |
| 549 | P.D.T. Drilling Limited Partnership | St. Albans, WV 25177 | Gas Operator | Dec 2021 |
| 550 | Pacific Atlantic Resources, Inc. | | Oil & Gas Operator | Dec 2021 |
| 551 | Paleo, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2025 |
| 552 | Panther Creek Mining, LLC | Lexington, KY 40475 | Gas Operator | Dec 2021 |
| 553 | Panther LLC | Fort Worth, TX 76102 | Gas Operator | Dec 2020 |
| 554 | Parker Gas Company | | Oil & Gas Operator | Aug 2020 |
| 555 | Parker, Denzil L & Emma Louise | Mannington, WV 26582-0188 | Oil & Gas Operator | Dec 2016 |
| 556 | Parks, Lawrence E | Big Bend, WV 26136-0000 | Oil & Gas Operator | Nov 2013 |
| 557 | Patchwork Oil & Gas LLC | Davisville, WV 26142 | Oil & Gas Operator | Dec 2021 |
| 558 | Pauley, Joseph E | Spencer, WV 25276-8719 | Oil & Gas Operator | Dec 2021 |
| 559 | Pauley, Ralph | Sod, WV 25564 | Oil & Gas Operator | Dec 2021 |
| 560 | Pauley, W.E., Agent | Spencer, WV 25276-0000 | Gas Operator | Dec 2021 |
| 561 | Paulico Resources, Inc. | Charleston, WV 25301-0000 | Oil & Gas Operator | Dec 2021 |
| 562 | Payne, Robert E | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 563 | PDC Mountaineer LLC | Bridgeport, WV 26330-9665 | Oil & Gas Operator | Dec 2017 |
| 564 | Peake Operating Company | | Oil & Gas Operator | Dec 1999 |
| 565 | Pemco Gas Inc | Indian Harbor B, FL 32937 | Oil & Gas Operator | Dec 1997 |
| 566 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2018 |
| 567 | Penn-Ohio Investment Corp. | New Philadelphi, OH 44663 | Oil & Gas Operator | Dec 2004 |
| 568 | Penneco Oil Company, Inc. | Delmont, PA 15626-2408 | Oil & Gas Operator | Dec 2024 |
| 569 | Pentex Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 570 | Pentress Gas LLC | Pentress, WV 26544 | Gas Operator | Dec 2021 |
| 571 | Pepper Development, LLC | Clarksburg, WV 26302 | Oil & Gas Operator | Dec 2021 |
| 572 | Perkins Oil & Gas Inc | Pennsboro, WV 26415-0547 | Oil & Gas Operator | Dec 2021 |
| 573 | Perkins Production Company LLC | Pennsboro, WV 26415 | Oil & Gas Operator | Dec 2021 |
| 574 | Petro Holdings, Inc. | Spencer, WV 25276-0000 | Oil & Gas Operator | Dec 2021 |
| 575 | Petro-Go, Inc. | | Oil & Gas Operator | Mar 1996 |
| 576 | Petro-Mark, Inc. | St Petersburg, FL 33701 | Oil & Gas Operator | Dec 2021 |
| 577 | Petroleum Development Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 578 | Petroleum Resources, LLC | | Oil & Gas Operator | Dec 2021 |
| 579 | Petroleum Service Partners, Inc. | Indiana, PA 15701-0000 | Oil & Gas Operator | Dec 2021 |
| 580 | Phoenix Oil, LLC | | Oil & Gas Operator | Dec 2021 |
| 581 | Piersol Oil & Gas Company | Belpre, OH 45714-0000 | Oil & Gas Operator | Dec 2021 |
| 582 | Pillar Energy, LLC | Charleston, WV 25312-5987-5987 | Oil & Gas Operator | Dec 2024 |
| 583 | Pilot Oil & Gas Corporation | | Gas Operator | Dec 2008 |
| 584 | Pin Oak Operating, LLC | | Gas Operator | Dec 2021 |
| 585 | Pinnacle Mining Company, LLC | | Oil & Gas Operator | Dec 2017 |
| 586 | PMJ, Inc. | Man, WV 25635-0000 | Gas Operator | Dec 2021 |
| 587 | Pocahontas Gas LLC | | Gas Operator | Dec 2021 |
| 588 | Postrock Eastern Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2020 |
| 589 | Precision Operating, LLC | Bridgeport, WV 26330 | Gas Operator | Dec 2019 |
| 590 | Prenco | Vienna, WV 26105 | Oil & Gas Operator | Dec 2021 |
| 591 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Mar 2025 |
| 592 | Prince Petroleum Company, Inc. | Salem, WV 26426 | Oil & Gas Operator | Dec 2014 |
| 593 | Prior, Ferrell L | | Oil & Gas Operator | Dec 2021 |
| 594 | Priority Production, LLC | | Gas Operator | Dec 2021 |
| 595 | Professional Oilfield Services, Inc. | Byesville, OH 43723 | Oil & Gas Operator | Dec 2021 |
| 596 | Pruitt, Cecil, Jr. | Chantilly, VA 22021-2105 | Oil & Gas Operator | Dec 2014 |
| 597 | Prusack, James | Grantsville, WV 26147-0180 | Oil & Gas Operator | Dec 2021 |
| 598 | Pure Oil Co | | Oil & Gas Operator | Dec 1996 |
| 599 | Putnam, William H | Marietta, OH 45750 | Oil & Gas Operator | Dec 2022 |
| 600 | Quaker State Corporation | Houston, TX 77002-2806 | Oil & Gas Operator | Dec 2013 |