| 501 | ROYAL OL & GAS CORP | Clearfield County, PA | Gas Property | Dec 2023 |
| 502 | ROYSTONE | Warren County, PA | Oil & Gas Property | Dec 2010 |
| 503 | ROZAK | Fayette County, PA | Gas Property | Dec 2024 |
| 504 | RR ADAMS | Jefferson County, PA | Gas Property | Dec 2024 |
| 505 | RUARK EAST RUARK EAST 1 1H | Wyoming County, PA | Gas Property | May 2025 |
| 506 | RUARK EAST UNIT RUARK 11H | Wyoming County, PA | Gas Property | May 2025 |
| 507 | RUARK SOUTH UNIT RUARK EAST 1 RUARK SOUTH 2H | Wyoming County, PA | Gas Property | May 2025 |
| 508 | RUARK UNIT P&G 5 RUARK 4H | Wyoming County, PA | Gas Property | May 2025 |
| 509 | RUARK-JOHNSTON-REIMILLER UNIT P&G2 22H | Wyoming County, PA | Gas Property | May 2025 |
| 510 | RUCCIO | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 511 | RUDOLPH | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 512 | RUDOLPH H GASTON | Indiana County, PA | Gas Property | Dec 2024 |
| 513 | RUDOLPH L KUHNER | Indiana County, PA | Gas Property | Dec 2024 |
| 514 | RUDY | Washington County, PA | Gas Property | Dec 2024 |
| 515 | RUELBA L STEEL | Indiana County, PA | Gas Property | Dec 2024 |
| 516 | RUFF 0 | Westmoreland County, PA | Gas Property | Dec 2024 |
| 517 | RUGGERI 00 | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 518 | RUHLMAN | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 519 | RUHLMAN | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 520 | RUHLMAN | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 521 | RUHLMAN LEASE R | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 522 | RUHLMAN LOT 452 2 | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 523 | RUKAVINA UNIT | Washington County, PA | Gas Property | May 2025 |
| 524 | RUMPELSTILTSKIN | Washington County, PA | Gas Property | May 2025 |
| 525 | RUNABUCK UNIT | Sullivan County, PA | Gas Property | May 2025 |
| 526 | RUOT | Venango County, PA | Oil Property | Dec 2024 |
| 527 | RUPERT | Armstrong County, PA | Gas Property | Dec 2024 |
| 528 | RUPERT | Clearfield County, PA | Gas Property | Dec 2024 |
| 529 | RUPERT | Armstrong County, PA | Gas Property | Dec 2024 |
| 530 | RUPERT | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 531 | RUPP | Armstrong County, PA | Gas Property | Dec 2024 |
| 532 | RUPP | Armstrong County, PA | Gas Property | Dec 2024 |
| 533 | RUPP | Armstrong County, PA | Gas Property | Dec 2024 |
| 534 | RURA | Indiana County, PA | Gas Property | Dec 2024 |
| 535 | RUSCITTO | Washington County, PA | Oil & Gas Property | Dec 2024 |
| 536 | RUSH | Greene County, PA | Oil & Gas Property | May 2025 |
| 537 | RUSH JOHN UNIT | Washington County, PA | Gas Property | May 2025 |
| 538 | RUSSELL | Crawford County, PA | Gas Property | Dec 2024 |
| 539 | RUSSELL | Potter County, PA | Oil & Gas Property | Dec 2024 |
| 540 | RUSSELL | Indiana County, PA | Gas Property | Dec 2024 |
| 541 | RUSSELL COOPER | Jefferson County, PA | Gas Property | Dec 2024 |
| 542 | RUSSELL JOHNS | Indiana County, PA | Gas Property | Dec 2024 |
| 543 | RUSSELL JOHNSTON | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 544 | RUSSELL L BYERS | Westmoreland County, PA | Gas Property | Dec 2024 |
| 545 | RUSSELL L JR & GWEN | Armstrong County, PA | Gas Property | Dec 2024 |
| 546 | RUSSELL MARION PAINTER | Venango County, PA | Oil & Gas Property | Dec 2024 |
| 547 | RUSSELL MCCLUNE | Clarion County, PA | Gas Property | Dec 2024 |
| 548 | RUSSELL P OLSON | Indiana County, PA | Gas Property | Dec 2024 |
| 549 | RUSSELLVILLE | Indiana County, PA | Gas Property | Dec 2024 |
| 550 | RUSSO B 0 | Susquehanna County, PA | Gas Property | May 2025 |
| 551 | RUSTIC | Indiana County, PA | Gas Property | Dec 2024 |
| 552 | RUTAN MOR1 | Greene County, PA | Gas Property | May 2025 |
| 553 | RUTH | Wyoming County, PA | Gas Property | May 2025 |
| 554 | RUTH CORBETT | Clarion County, PA | Gas Property | Dec 2024 |
| 555 | RUTH E BO | Indiana County, PA | Gas Property | Dec 2024 |
| 556 | RUTH ISEMAN | Armstrong County, PA | Gas Property | May 2025 |
| 557 | RUTH L KIMMEL | Armstrong County, PA | Gas Property | Dec 2024 |
| 558 | RUTH WIGGINS | Indiana County, PA | Gas Property | Dec 2024 |
| 559 | RUTKOWSKI | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 560 | RUTKOWSKI | Erie County, PA | Oil & Gas Property | Dec 2024 |
| 561 | RUTKOWSKI B 6 | Susquehanna County, PA | Gas Property | May 2025 |
| 562 | RUTLEDGE UNIT | Butler County, PA | Oil & Gas Property | May 2025 |
| 563 | RV BURNS JR | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 564 | RWS DEVELOPMENT 00 | Westmoreland County, PA | Gas Property | Dec 2024 |
| 565 | RYAN LO | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 566 | RYBAK | Venango County, PA | Oil & Gas Property | Dec 2024 |
| 567 | RYBKA-ZIMMERMAN | Venango County, PA | Oil Property | Dec 2024 |
| 568 | RYLEE | Susquehanna County, PA | Gas Property | May 2025 |
| 569 | RYND | Crawford County, PA | Gas Property | Dec 2024 |
| 570 | RYPCZYK 00 | Westmoreland County, PA | Gas Property | Dec 2024 |