| 6401 | RIVER RIDGE DEVELOPMENT INC | Venango County, PA | Oil Property | Dec 2025 |
| 6402 | RM & WB DUNN LEASE | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 6403 | ROARING RUN | Armstrong County, PA | Gas Property | Dec 2025 |
| 6404 | ROARING RUN UNIT | Lycoming County, PA | Gas Property | Jun 2026 |
| 6405 | ROBBINS | Clearfield County, PA | Gas Property | Dec 2025 |
| 6406 | ROBBINS BRA | Bradford County, PA | Gas Property | Jun 2026 |
| 6407 | ROBERT | Erie County, PA | Gas Property | Dec 2025 |
| 6408 | ROBERT | Indiana County, PA | Gas Property | Dec 2015 |
| 6409 | ROBERT | Indiana County, PA | Gas Property | Dec 2025 |
| 6410 | ROBERT | Indiana County, PA | Gas Property | Dec 2025 |
| 6411 | ROBERT | Armstrong County, PA | Gas Property | Dec 2025 |
| 6412 | ROBERT | Warren County, PA | Gas Property | Dec 2025 |
| 6413 | ROBERT | Westmoreland County, PA | Oil & Gas Property | Dec 2025 |
| 6414 | ROBERT | Erie County, PA | Oil & Gas Property | Dec 2025 |
| 6415 | ROBERT | Armstrong County, PA | Gas Property | Dec 2025 |
| 6416 | ROBERT | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 6417 | ROBERT | Jefferson County, PA | Oil & Gas Property | Dec 2025 |
| 6418 | ROBERT | Indiana County, PA | Gas Property | Dec 2025 |
| 6419 | ROBERT | Armstrong County, PA | Oil & Gas Property | Dec 2025 |
| 6420 | ROBERT | Jefferson County, PA | Gas Property | Dec 2025 |
| 6421 | ROBERT | Jefferson County, PA | Gas Property | Dec 2025 |
| 6422 | ROBERT | Armstrong County, PA | Gas Property | Dec 2025 |
| 6423 | ROBERT | Crawford County, PA | Oil & Gas Property | Dec 2025 |
| 6424 | ROBERT & PAULETTE | Indiana County, PA | Gas Property | Dec 2025 |
| 6425 | ROBERT A HOY | Clarion County, PA | Gas Property | Dec 2025 |
| 6426 | ROBERT ALLISON L | Clarion County, PA | Gas Property | Dec 2025 |
| 6427 | ROBERT BOLDIN | Indiana County, PA | Gas Property | Dec 2025 |
| 6428 | ROBERT BOWERSOX | Clarion County, PA | Gas Property | Dec 2025 |
| 6429 | ROBERT BOYD SPENCE | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 6430 | ROBERT BURN | Clarion County, PA | Gas Property | Jun 2026 |
| 6431 | ROBERT BURNS | Clarion County, PA | Gas Property | Dec 2025 |
| 6432 | ROBERT BUSH | Mercer County, PA | Oil & Gas Property | Dec 2025 |
| 6433 | ROBERT BUTERBAUGH | Indiana County, PA | Gas Property | Dec 2025 |
| 6434 | ROBERT C ALLISON | Clarion County, PA | Gas Property | Dec 2025 |
| 6435 | ROBERT C LEVIN ET UX | Westmoreland County, PA | Oil & Gas Property | Dec 2025 |
| 6436 | ROBERT C ULMER A | Lycoming County, PA | Gas Property | Jun 2026 |
| 6437 | ROBERT C. CRISSMAN | Armstrong County, PA | Gas Property | Dec 2025 |
| 6438 | ROBERT C. HILLEN ETUX | Fayette County, PA | Gas Property | Dec 2025 |
| 6439 | ROBERT COLEMAN | Clarion County, PA | Oil & Gas Property | Dec 2025 |
| 6440 | ROBERT D | Indiana County, PA | Gas Property | Dec 2025 |
| 6441 | ROBERT D | Crawford County, PA | Gas Property | Dec 2025 |
| 6442 | ROBERT E PATRICK | Armstrong County, PA | Gas Property | Dec 2025 |
| 6443 | ROBERT E WISSINGER | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 6444 | ROBERT GRAHAM | Westmoreland County, PA | Gas Property | Dec 2025 |
| 6445 | ROBERT H NEHRIG | Indiana County, PA | Gas Property | Dec 2025 |
| 6446 | ROBERT HAMI | Jefferson County, PA | Gas Property | Dec 2025 |
| 6447 | ROBERT HITCHCOCK | Crawford County, PA | Gas Property | Dec 1990 |
| 6448 | ROBERT HOUSER | Armstrong County, PA | Gas Property | Dec 2025 |
| 6449 | ROBERT J CITERONI | Indiana County, PA | Gas Property | Dec 2025 |
| 6450 | ROBERT J FABIN | Indiana County, PA | Gas Property | Dec 2025 |
| 6451 | ROBERT J. DILTS FMLY ROY R | Indiana County, PA | Gas Property | Dec 2025 |
| 6452 | ROBERT KESTER | Clearfield County, PA | Gas Property | Dec 2025 |
| 6453 | ROBERT L. CALHOUN | Armstrong County, PA | Gas Property | Dec 2025 |
| 6454 | ROBERT M | Indiana County, PA | Gas Property | Dec 2025 |
| 6455 | ROBERT M LENHART | Westmoreland County, PA | Gas Property | Dec 2025 |
| 6456 | ROBERT MITCHELL 8 | Indiana County, PA | Gas Property | Dec 2025 |
| 6457 | ROBERT MURPHY | Westmoreland County, PA | Gas Property | Dec 2025 |
| 6458 | ROBERT N BROTHERS | Clearfield County, PA | Gas Property | Dec 2025 |
| 6459 | ROBERT OSGOOD | McKean County, PA | Gas Property | Dec 2025 |
| 6460 | ROBERT SAWYER | Clarion County, PA | Gas Property | Dec 2025 |
| 6461 | ROBERT SHORTS | Washington County, PA | Oil & Gas Property | Jun 2026 |
| 6462 | ROBERT SMITH | Washington County, PA | Gas Property | Jun 2026 |
| 6463 | ROBERT SPENCER | Erie County, PA | Gas Property | Dec 2018 |
| 6464 | ROBERT SPENCER | Clearfield County, PA | Oil & Gas Property | Dec 2025 |
| 6465 | ROBERT STRONG | Indiana County, PA | Gas Property | Dec 2025 |
| 6466 | ROBERT V MAINE | Jefferson County, PA | Gas Property | Dec 2025 |
| 6467 | ROBERT W. GRAY FM AT | Westmoreland County, PA | Oil & Gas Property | Dec 2025 |
| 6468 | ROBERTA B JONES | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 6469 | ROBERTS | Greene County, PA | Gas Property | Dec 2015 |
| 6470 | ROBERTS 59 | Greene County, PA | Gas Property | Jun 2026 |
| 6471 | ROBERTS BEA | Beaver County, PA | Gas Property | Jun 2026 |
| 6472 | ROBERTSON | Armstrong County, PA | Gas Property | Dec 2025 |
| 6473 | ROBINHILL | Washington County, PA | Oil & Gas Property | Jun 2026 |
| 6474 | ROBINSON | Bradford County, PA | Gas Property | Jun 2026 |
| 6475 | ROBINSON | Susquehanna County, PA | Gas Property | Jun 2026 |
| 6476 | ROBINSON | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 6477 | ROBINSON | Fayette County, PA | Oil & Gas Property | May 2026 |
| 6478 | ROBINSON | Armstrong County, PA | Gas Property | Dec 2025 |
| 6479 | ROBINSON 82 | Indiana County, PA | Gas Property | Dec 2025 |
| 6480 | ROBINSON CAMPBELL 11132 | Washington County, PA | Gas Property | Jun 2026 |
| 6481 | ROBINSON FERGUSON | Bradford County, PA | Gas Property | Jun 2026 |
| 6482 | ROBY GROSE | Jefferson County, PA | Oil & Gas Property | Dec 2025 |
| 6483 | ROCHESTER & PGH | Clearfield County, PA | Gas Property | Dec 2025 |
| 6484 | ROCHESTER & PGH C | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 6485 | ROCHESTER & PGH COAL | Jefferson County, PA | Gas Property | Dec 2025 |
| 6486 | ROCHESTER & PGH COAL | Armstrong County, PA | Oil & Gas Property | Dec 2025 |
| 6487 | ROCHESTER & PGH COAL | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 6488 | ROCHESTER & PGH COAL CO | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 6489 | ROCHESTER & PGH COAL CO | Jefferson County, PA | Gas Property | Dec 2025 |
| 6490 | ROCHESTER & PGH COAL CO | Jefferson County, PA | Gas Property | Dec 2025 |
| 6491 | ROCHESTER & PITT | Indiana County, PA | Gas Property | Dec 2025 |
| 6492 | ROCHESTER & PITTS | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 6493 | ROCHESTER & PITTSBURG | Armstrong County, PA | Gas Property | Dec 2025 |
| 6494 | ROCHESTER & PITTSBURGH CO | Indiana County, PA | Gas Property | Dec 2025 |
| 6495 | ROCHESTER & PITTSBURGH COAL CO | Armstrong County, PA | Oil & Gas Property | Dec 2025 |
| 6496 | ROCHESTER & PITTSBURGH COAL CO | Indiana County, PA | Gas Property | Dec 2025 |
| 6497 | ROCHESTER & PITTSUBRGH COAL CO | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 6498 | ROCHESTER&PITTSBURGH COAL | Westmoreland County, PA | Oil & Gas Property | Dec 2025 |
| 6499 | ROCK FURNA | Armstrong County, PA | Gas Property | Dec 2025 |
| 6500 | ROCK RUN | McKean County, PA | Oil Property | Dec 2025 |