| 6401 | RENN UNIT A | Lycoming County, PA | Gas Property | Dec 2025 |
| 6402 | RENO | Venango County, PA | Oil Property | Dec 2006 |
| 6403 | RENO | Butler County, PA | Gas Property | Dec 2025 |
| 6404 | RENO UNIT 1H | Butler County, PA | Gas Property | Dec 2025 |
| 6405 | RENOE | Centre County, PA | Gas Property | Dec 2025 |
| 6406 | RENOSKY | Indiana County, PA | Gas Property | Dec 2025 |
| 6407 | RENSHAW | Armstrong County, PA | Gas Property | Dec 2025 |
| 6408 | RENSMA | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 6409 | RENSMA | Crawford County, PA | Gas Property | Dec 2024 |
| 6410 | RENSMA | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 6411 | RENSMA | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 6412 | RENSMA | Forest County, PA | Oil Property | Dec 2021 |
| 6413 | RENSMA STEPHENS | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 6414 | RENSMA STOUT RS | Venango County, PA | Oil Property | Dec 2013 |
| 6415 | REPIK UNIT | Indiana County, PA | Gas Property | Dec 2025 |
| 6416 | REPINE 07 022 0 | Susquehanna County, PA | Gas Property | Dec 2025 |
| 6417 | RESOURCE RECOVERY | Centre County, PA | Gas Property | Dec 2025 |
| 6418 | REUBEN BUGHMAN | Jefferson County, PA | Gas Property | Dec 2025 |
| 6419 | REXFORD | Bradford County, PA | Gas Property | Mar 2022 |
| 6420 | REXFORD L & DOROTHY C HUBER | Indiana County, PA | Gas Property | Dec 2025 |
| 6421 | REYNEN J | Susquehanna County, PA | Gas Property | Dec 2025 |
| 6422 | REYNLOW PARK | Jefferson County, PA | Gas Property | Dec 2025 |
| 6423 | REYNOLDS | Lycoming County, PA | Gas Property | Dec 2025 |
| 6424 | REYNOLDS R | Susquehanna County, PA | Gas Property | Dec 2025 |
| 6425 | REYNOLDS RX | Potter County, PA | Oil & Gas Property | Dec 2024 |
| 6426 | REYNOLDS UNIT | Wyoming County, PA | Gas Property | Dec 2025 |
| 6427 | REYNOLDS UNIT REIMILLER 1 REYNOLDS 1H | Wyoming County, PA | Gas Property | Dec 2025 |
| 6428 | RGB BRA | Bradford County, PA | Gas Property | Dec 2025 |
| 6429 | RHEA-LAWER | Indiana County, PA | Gas Property | Dec 2025 |
| 6430 | RHL22 | Greene County, PA | Gas Property | Dec 2025 |
| 6431 | RHL23 | Greene County, PA | Oil & Gas Property | Dec 2025 |
| 6432 | RHL4 | Greene County, PA | Oil & Gas Property | Dec 2025 |
| 6433 | RHODA GRACE BEERCHECK | Jefferson County, PA | Oil & Gas Property | Dec 2025 |
| 6434 | RHODES | Westmoreland County, PA | Gas Property | Dec 2008 |
| 6435 | RHODES | Lycoming County, PA | Gas Property | Dec 2025 |
| 6436 | RHONE GAMBLE | Lycoming County, PA | Gas Property | Dec 2025 |
| 6437 | RHP-A | Clearfield County, PA | Gas Property | Dec 2025 |
| 6438 | RHUEL STIFFLER | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 6439 | RICCI | Susquehanna County, PA | Gas Property | Dec 2025 |
| 6440 | RICE | Venango County, PA | Oil & Gas Property | Dec 2024 |
| 6441 | RICE | McKean County, PA | Gas Property | Dec 1996 |
| 6442 | RICE UNIT | Greene County, PA | Gas Property | Dec 2025 |
| 6443 | RICH | Bradford County, PA | Gas Property | Dec 2025 |
| 6444 | RICH FARMS | Fayette County, PA | Oil & Gas Property | Dec 2025 |
| 6445 | RICH HILL COAL MINING CO | Westmoreland County, PA | Oil & Gas Property | Dec 2025 |
| 6446 | RICHARD | Venango County, PA | Gas Property | Dec 2024 |
| 6447 | RICHARD | Erie County, PA | Gas Property | Dec 2025 |
| 6448 | RICHARD | Potter County, PA | Gas Property | Dec 2017 |
| 6449 | RICHARD | Westmoreland County, PA | Gas Property | Dec 2025 |
| 6450 | RICHARD A SHIDEMANTLE | Crawford County, PA | Oil & Gas Property | Dec 2025 |
| 6451 | RICHARD APPLEBEE | Erie County, PA | Gas Property | Dec 2025 |
| 6452 | RICHARD E HENTON | Crawford County, PA | Gas Property | Dec 2024 |
| 6453 | RICHARD HUESSENER | Westmoreland County, PA | Oil & Gas Property | Dec 2025 |
| 6454 | RICHARD J CERAR | Greene County, PA | Gas Property | Dec 2022 |
| 6455 | RICHARD L B | Indiana County, PA | Gas Property | Dec 2025 |
| 6456 | RICHARD L STEWART | Clarion County, PA | Gas Property | Dec 2025 |
| 6457 | RICHARD M KOONTZ | Westmoreland County, PA | Gas Property | Dec 2025 |
| 6458 | RICHARD MORRISON | Venango County, PA | Gas Property | Dec 2025 |
| 6459 | RICHARD N. LOMMOCK | Indiana County, PA | Gas Property | Dec 2025 |
| 6460 | RICHARD NULPH | Indiana County, PA | Gas Property | Dec 2025 |
| 6461 | RICHARD P RIN | Indiana County, PA | Gas Property | Dec 2025 |
| 6462 | RICHARD R WALKER ET AL | Butler County, PA | Oil & Gas Property | Dec 2025 |
| 6463 | RICHARD SUS | Susquehanna County, PA | Gas Property | Dec 2025 |
| 6464 | RICHARD W CHAMBERS | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 6465 | RICHARDSON | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 6466 | RICHARDSON | Mercer County, PA | Gas Property | Dec 2025 |
| 6467 | RICHEY | Armstrong County, PA | Gas Property | Dec 2025 |
| 6468 | RICHLAND SPORTSM | Butler County, PA | Gas Property | Dec 2025 |
| 6469 | RICKETTS | Clearfield County, PA | Gas Property | Dec 2025 |
| 6470 | RIDDLE | Crawford County, PA | Gas Property | Dec 2024 |
| 6471 | RIDENOUR | Sullivan County, PA | Gas Property | Dec 2025 |
| 6472 | RIDER | Fayette County, PA | Gas Property | Dec 2025 |
| 6473 | RIDER PARK SMITH 1H | Lycoming County, PA | Gas Property | Dec 2025 |
| 6474 | RIDGE ROAD | Greene County, PA | Gas Property | Dec 2025 |
| 6475 | RIDGEVIEW | Armstrong County, PA | Gas Property | Dec 2025 |
| 6476 | RIDGWAY LIGHT & HEAT | Elk County, PA | Gas Property | Dec 2025 |
| 6477 | RIDGWAY LIGHT & HEAT | Elk County, PA | Gas Property | Dec 2025 |
| 6478 | RIFFER | Armstrong County, PA | Gas Property | Dec 2025 |
| 6479 | RIGBY | Crawford County, PA | Oil & Gas Property | Dec 2004 |
| 6480 | RIGGS | Greene County, PA | Oil & Gas Property | Dec 2023 |
| 6481 | RIGHI | Armstrong County, PA | Gas Property | Dec 2025 |
| 6482 | RINGGOLD | Armstrong County, PA | Gas Property | Dec 2025 |
| 6483 | RINGGOLD | Armstrong County, PA | Oil & Gas Property | Dec 2025 |
| 6484 | RINGGOLD CORP | Jefferson County, PA | Gas Property | Dec 2025 |
| 6485 | RINGGOLD MINES INC. UNIT NO. 1 | Armstrong County, PA | Gas Property | Dec 2025 |
| 6486 | RINGGOLD SPORTSMEN ASSOC | Jefferson County, PA | Gas Property | Dec 2025 |
| 6487 | RINKHOFF AGRIC ENTER | Greene County, PA | Gas Property | Dec 2012 |
| 6488 | RINKHOFF AGRICULTURAL ENTERPRISES LLC | Greene County, PA | Gas Property | Dec 2016 |
| 6489 | RIPPLE | Armstrong County, PA | Gas Property | Dec 2025 |
| 6490 | RISTAU | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 6491 | RITCHEY | Venango County, PA | Oil Property | Dec 1997 |
| 6492 | RITCHEY UNIT | Blair County, PA | Gas Property | Dec 2025 |
| 6493 | RITENOUR | Westmoreland County, PA | Gas Property | Dec 2025 |
| 6494 | RITTENHOUSE | Fayette County, PA | Gas Property | Dec 2025 |
| 6495 | RITTER UNIT | Fayette County, PA | Gas Property | Dec 2025 |
| 6496 | RITZ 03 073 0 | Bradford County, PA | Gas Property | Dec 2025 |
| 6497 | RIVER | Greene County, PA | Gas Property | Dec 2025 |
| 6498 | RIVER RIDGE | Venango County, PA | Oil Property | Dec 2025 |
| 6499 | RIVER RIDGE DEVELOPMENT INC | Venango County, PA | Oil Property | Dec 2025 |
| 6500 | RM & WB DUNN LEASE | McKean County, PA | Oil & Gas Property | Dec 2025 |