| 401 | WILLIAM | Westmoreland County, PA | Gas Property | Dec 2002 |
| 402 | WILLIAM | Clearfield County, PA | Gas Property | Dec 2024 |
| 403 | WILLIAM | Clearfield County, PA | Gas Property | Dec 2024 |
| 404 | WILLIAM | Washington County, PA | Gas Property | Dec 2024 |
| 405 | WILLIAM | Indiana County, PA | Gas Property | Dec 2024 |
| 406 | WILLIAM | Jefferson County, PA | Gas Property | Dec 2024 |
| 407 | WILLIAM | Jefferson County, PA | Gas Property | Dec 2016 |
| 408 | WILLIAM | Indiana County, PA | Gas Property | Dec 2024 |
| 409 | WILLIAM | Indiana County, PA | Gas Property | Dec 2024 |
| 410 | WILLIAM | Jefferson County, PA | Gas Property | Dec 2024 |
| 411 | WILLIAM | Westmoreland County, PA | Gas Property | Dec 2024 |
| 412 | WILLIAM | Westmoreland County, PA | Gas Property | Dec 2024 |
| 413 | WILLIAM A GEORGE ET | Indiana County, PA | Gas Property | Dec 2024 |
| 414 | WILLIAM A GIBSON JR | Indiana County, PA | Gas Property | Dec 2024 |
| 415 | WILLIAM A PEOPLES | Armstrong County, PA | Gas Property | Dec 2024 |
| 416 | WILLIAM B | Greene County, PA | Gas Property | Dec 2024 |
| 417 | WILLIAM B | Jefferson County, PA | Oil & Gas Property | Dec 2024 |
| 418 | WILLIAM B DRUMMOND | Jefferson County, PA | Gas Property | Dec 2024 |
| 419 | WILLIAM BARTHOLOMEW | Greene County, PA | Oil & Gas Property | Dec 2024 |
| 420 | WILLIAM BAUGHMAN | Jefferson County, PA | Gas Property | Dec 2024 |
| 421 | WILLIAM BORBONUS | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 422 | WILLIAM BUTERBAUGH | Cambria County, PA | Oil & Gas Property | Dec 2024 |
| 423 | WILLIAM C | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 424 | WILLIAM C HOUSER JR (159 AC) | Indiana County, PA | Gas Property | Dec 2024 |
| 425 | WILLIAM C WIDDOWSON | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 426 | WILLIAM D MILLS | Fayette County, PA | Gas Property | Dec 2024 |
| 427 | WILLIAM E | Clearfield County, PA | Gas Property | Dec 2024 |
| 428 | WILLIAM E HOLLOBAUGH | Clarion County, PA | Gas Property | Dec 2024 |
| 429 | WILLIAM E MCCHESNEY | Warren County, PA | Gas Property | Dec 2024 |
| 430 | WILLIAM F CLEPPER ETUX | Armstrong County, PA | Oil & Gas Property | May 2025 |
| 431 | WILLIAM FLEMING 1 | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 432 | WILLIAM G EICHMAN | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 433 | WILLIAM G SHE | Clearfield County, PA | Gas Property | Dec 2024 |
| 434 | WILLIAM GRAHAM | Westmoreland County, PA | Gas Property | Dec 2024 |
| 435 | WILLIAM H BUTERBAUGH FAMILY TRUST | Clearfield County, PA | Gas Property | Dec 2024 |
| 436 | WILLIAM H CONN | Venango County, PA | Gas Property | Dec 2024 |
| 437 | WILLIAM H RENSHAW ETUX | Armstrong County, PA | Gas Property | Dec 2024 |
| 438 | WILLIAM H SANGER | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 439 | WILLIAM HEN | Crawford County, PA | Gas Property | Dec 2024 |
| 440 | WILLIAM J | Clearfield County, PA | Gas Property | Dec 2024 |
| 441 | WILLIAM J | Armstrong County, PA | Gas Property | Dec 2024 |
| 442 | WILLIAM J | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 443 | WILLIAM J & FAYE C TODD | Mercer County, PA | Gas Property | Dec 2006 |
| 444 | WILLIAM LANE GRE | Greene County, PA | Gas Property | May 2025 |
| 445 | WILLIAM MCINTIRE | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 446 | WILLIAM OLSON | Jefferson County, PA | Gas Property | Dec 2024 |
| 447 | WILLIAM POLITO ( | Indiana County, PA | Gas Property | Dec 2024 |
| 448 | WILLIAM R & LINDA M DOVERSPIKE | Armstrong County, PA | Gas Property | Dec 2024 |
| 449 | WILLIAM S | Westmoreland County, PA | Gas Property | Dec 2024 |
| 450 | WILLIAM T EUWER ET AL | Indiana County, PA | Gas Property | Dec 2024 |
| 451 | WILLIAM V SPURLIN | Indiana County, PA | Gas Property | Dec 2024 |
| 452 | WILLIAM W LITKE ET | Clinton County, PA | Gas Property | Dec 2022 |
| 453 | WILLIAM WILLIAMS | Indiana County, PA | Gas Property | Dec 2024 |
| 454 | WILLIAMS | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 455 | WILLIAMS | Fayette County, PA | Gas Property | Dec 2024 |
| 456 | WILLIAMS | Venango County, PA | Oil & Gas Property | Dec 2004 |
| 457 | WILLIAMS | Butler County, PA | Gas Property | Aug 2024 |
| 458 | WILLIAMS | Crawford County, PA | Oil & Gas Property | Dec 2024 |
| 459 | WILLIAMS | Bradford County, PA | Gas Property | May 2025 |
| 460 | WILLIAMS | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 461 | WILLIAMS | Clearfield County, PA | Gas Property | Dec 2024 |
| 462 | WILLIAMS | Bradford County, PA | Gas Property | May 2025 |
| 463 | WILLIAMS D 0 | Susquehanna County, PA | Gas Property | May 2025 |
| 464 | WILLIAMSON | Armstrong County, PA | Gas Property | Dec 2024 |
| 465 | WILLIAMSON | Armstrong County, PA | Gas Property | Dec 2024 |
| 466 | WILLIAMSON BRA | Bradford County, PA | Gas Property | May 2025 |
| 467 | WILLIAMSON TRACT | Warren County, PA | Oil & Gas Property | Dec 2007 |
| 468 | WILLIS | Greene County, PA | Oil & Gas Property | May 2025 |
| 469 | WILLIS ELLIOTT | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 470 | WILLIS TRACY | Crawford County, PA | Gas Property | Dec 2024 |
| 471 | WILLISON | Washington County, PA | Gas Property | May 2025 |
| 472 | WILLOW GLENN 81 | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 473 | WILMA K LEIGHTY | Fayette County, PA | Gas Property | Dec 2024 |
| 474 | WILMOTH | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 475 | WILSON | Indiana County, PA | Gas Property | Dec 2024 |
| 476 | WILSON | Venango County, PA | Oil Property | Dec 2024 |
| 477 | WILSON | Venango County, PA | Oil Property | Dec 2024 |
| 478 | WILSON | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 479 | WILSON | Westmoreland County, PA | Gas Property | May 2025 |
| 480 | WILSON 00 | Clearfield County, PA | Gas Property | Dec 2024 |
| 481 | WILSON 283 | Tioga County, PA | Gas Property | May 2025 |
| 482 | WILSON HINDMAN | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 483 | WILSON UNIT | Butler County, PA | Gas Property | May 2025 |
| 484 | WIMMER | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 485 | WINDY HILL | Venango County, PA | Oil Property | Dec 2024 |
| 486 | WINDY HILL | Venango County, PA | Gas Property | Dec 2024 |
| 487 | WINDY HOLLOW LLC 00 | Indiana County, PA | Gas Property | Dec 2024 |
| 488 | WINDY OAKLAND | Clarion County, PA | Gas Property | May 2025 |
| 489 | WINFIELD MINERAL CO 1066 | Butler County, PA | Gas Property | Dec 2024 |
| 490 | WINGARD | Clarion County, PA | Gas Property | Dec 2024 |
| 491 | WINGER W | Warren County, PA | Oil & Gas Property | Dec 2015 |
| 492 | WINIFRED | Indiana County, PA | Gas Property | Dec 2024 |
| 493 | WINNER | Clinton County, PA | Gas Property | May 2025 |
| 494 | WINNER | Clinton County, PA | Gas Property | May 2025 |
| 495 | WINOGRODZKI | Indiana County, PA | Gas Property | Dec 2024 |
| 496 | WINSLOW | Jefferson County, PA | Gas Property | Dec 2024 |
| 497 | WINTER | Lycoming County, PA | Gas Property | May 2025 |
| 498 | WINTERS | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 499 | WISE | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 500 | WISE | Jefferson County, PA | Gas Property | Dec 2024 |