| 501 | ROBERT E PATRICK | Armstrong County, PA | Gas Property | Dec 2023 |
| 502 | ROBERT HOUSER | Armstrong County, PA | Gas Property | Dec 2022 |
| 503 | ROBERT L. CALHOUN | Armstrong County, PA | Gas Property | Dec 2022 |
| 504 | ROBERTSON | Armstrong County, PA | Gas Property | Dec 2023 |
| 505 | ROBINSON | Armstrong County, PA | Gas Property | Dec 2023 |
| 506 | ROCHESTER & PGH COAL | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 507 | ROCHESTER & PITTSBURG | Armstrong County, PA | Gas Property | Dec 2023 |
| 508 | ROCHESTER & PITTSBURGH COAL CO | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 509 | ROCK FURNA | Armstrong County, PA | Gas Property | Dec 2023 |
| 510 | ROGER H CLAYPOOLE ETUX | Armstrong County, PA | Gas Property | Jan 2024 |
| 511 | ROLLING HILLS | Armstrong County, PA | Gas Property | Jan 2024 |
| 512 | ROSS | Armstrong County, PA | Gas Property | Dec 2023 |
| 513 | RUPERT | Armstrong County, PA | Gas Property | Dec 2023 |
| 514 | RUPERT | Armstrong County, PA | Gas Property | Dec 2023 |
| 515 | RUPP | Armstrong County, PA | Gas Property | Dec 2023 |
| 516 | RUPP | Armstrong County, PA | Gas Property | Dec 2023 |
| 517 | RUPP | Armstrong County, PA | Gas Property | Dec 2023 |
| 518 | RUSSELL L JR & GWEN | Armstrong County, PA | Gas Property | Dec 2023 |
| 519 | RUTH ISEMAN | Armstrong County, PA | Gas Property | Jan 2024 |
| 520 | RUTH L KIMMEL | Armstrong County, PA | Gas Property | Dec 2023 |
| 521 | S B CATHCART 174A | Armstrong County, PA | Gas Property | Dec 2023 |
| 522 | S F BOOHER | Armstrong County, PA | Gas Property | Dec 2023 |
| 523 | S H BOLLINGER | Armstrong County, PA | Gas Property | Dec 2023 |
| 524 | SAGC | Armstrong County, PA | Gas Property | Jan 2024 |
| 525 | SALTSBURG | Armstrong County, PA | Gas Property | Dec 2023 |
| 526 | SAMOSKY | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 527 | SAMUEL BEYER HEIRS | Armstrong County, PA | Gas Property | Dec 2023 |
| 528 | SAMUEL W MONTGOMERY | Armstrong County, PA | Gas Property | Jan 2024 |
| 529 | SCHAEFFER | Armstrong County, PA | Gas Property | Dec 2023 |
| 530 | SCHALL | Armstrong County, PA | Gas Property | Dec 2023 |
| 531 | SCHERCENGOST-TRACT | Armstrong County, PA | Gas Property | Dec 2022 |
| 532 | SCHRECENGOST | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 533 | SCHRECENGOST | Armstrong County, PA | Oil & Gas Property | Jan 2024 |
| 534 | SCHULTZ | Armstrong County, PA | Gas Property | Dec 2023 |
| 535 | SCOTT | Armstrong County, PA | Gas Property | Dec 2023 |
| 536 | SEDWICK HEIGHTS | Armstrong County, PA | Gas Property | Dec 2023 |
| 537 | SGL-247A-07 | Armstrong County, PA | Gas Property | Dec 2023 |
| 538 | SHAWMUT DEVELOPMENT CORP | Armstrong County, PA | Gas Property | Dec 2023 |
| 539 | SHAWMUT DEVELOPMENT CORP | Armstrong County, PA | Gas Property | Dec 2023 |
| 540 | SHEASLEY | Armstrong County, PA | Gas Property | Dec 2023 |
| 541 | SHEASLEY | Armstrong County, PA | Gas Property | Dec 2022 |
| 542 | SHELLHAMMER | Armstrong County, PA | Gas Property | Dec 2023 |
| 543 | SHERMAN 567 | Armstrong County, PA | Gas Property | Dec 2023 |
| 544 | SHICK | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 545 | SHILLING | Armstrong County, PA | Gas Property | Dec 2023 |
| 546 | SHIREY | Armstrong County, PA | Oil Property | Dec 2022 |
| 547 | SHIREY | Armstrong County, PA | Gas Property | Dec 2023 |
| 548 | SIGWORTH | Armstrong County, PA | Gas Property | Dec 2023 |
| 549 | SMAIL | Armstrong County, PA | Gas Property | Dec 2023 |
| 550 | SMELTZER | Armstrong County, PA | Gas Property | Jan 2024 |
| 551 | SMICIK | Armstrong County, PA | Gas Property | Dec 2023 |
| 552 | SMITH | Armstrong County, PA | Gas Property | Dec 2023 |
| 553 | SMITH GEORGE 00 | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 554 | SNYDER-BOWERSOX | Armstrong County, PA | Gas Property | Dec 2023 |
| 555 | SPENCER | Armstrong County, PA | Gas Property | Dec 2023 |
| 556 | SPORTSMAN | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 557 | SPRANKLE | Armstrong County, PA | Gas Property | Dec 2022 |
| 558 | SPRING CHURCH UNIT | Armstrong County, PA | Gas Property | Jan 2024 |
| 559 | ST GAME LANDS-137 | Armstrong County, PA | Gas Property | Dec 2023 |
| 560 | STANKAY | Armstrong County, PA | Gas Property | Dec 2023 |
| 561 | STATE GAME | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 562 | STEPHEN J. JAWORSKI, ETUX | Armstrong County, PA | Gas Property | Dec 2023 |
| 563 | STEROSKY | Armstrong County, PA | Gas Property | Dec 2023 |
| 564 | STEWART | Armstrong County, PA | Gas Property | Dec 2023 |
| 565 | STITT | Armstrong County, PA | Gas Property | Dec 2023 |
| 566 | STIVENSON | Armstrong County, PA | Gas Property | Dec 2023 |
| 567 | STONIS | Armstrong County, PA | Gas Property | Jan 2024 |
| 568 | STURGEON | Armstrong County, PA | Gas Property | Dec 2023 |
| 569 | STURGEON | Armstrong County, PA | Gas Property | Dec 2023 |
| 570 | SUMMIT COAL CORP | Armstrong County, PA | Gas Property | Dec 2023 |
| 571 | SUNNYSIDE | Armstrong County, PA | Gas Property | Jan 2024 |
| 572 | SWANK | Armstrong County, PA | Gas Property | Jan 2024 |
| 573 | SWANK 43 | Armstrong County, PA | Gas Property | Dec 2023 |
| 574 | SZYMANSKI | Armstrong County, PA | Gas Property | Dec 2023 |
| 575 | T A MCKEE | Armstrong County, PA | Gas Property | Jan 2024 |
| 576 | T M DICE | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 577 | TERRY 59 | Armstrong County, PA | Gas Property | Jan 2024 |
| 578 | TERRY BOWSER A UNIT | Armstrong County, PA | Gas Property | Jan 2024 |
| 579 | THE JOY CO | Armstrong County, PA | Gas Property | Dec 2023 |
| 580 | THOMAS A SMITH ETUX | Armstrong County, PA | Gas Property | Dec 2023 |
| 581 | THOMAS F & DEVOTA M HUFF | Armstrong County, PA | Gas Property | Dec 2023 |
| 582 | THOMAS HOLLOBAUGH | Armstrong County, PA | Gas Property | Dec 2023 |
| 583 | THOMAS J SMITH ETUX | Armstrong County, PA | Gas Property | Dec 2023 |
| 584 | THOMAS R ELLIOTT ETUX | Armstrong County, PA | Gas Property | Dec 2023 |
| 585 | THOMAS S | Armstrong County, PA | Gas Property | Dec 2023 |
| 586 | TICKLE FARM | Armstrong County, PA | Gas Property | Jan 2024 |
| 587 | TOWNSEND | Armstrong County, PA | Gas Property | Dec 2023 |
| 588 | TRAISTER 00 | Armstrong County, PA | Gas Property | Dec 2023 |
| 589 | TRILOGY | Armstrong County, PA | Gas Property | Jan 2024 |
| 590 | TRUITT | Armstrong County, PA | Gas Property | Dec 2023 |
| 591 | TUTAK | Armstrong County, PA | Gas Property | Dec 2023 |
| 592 | UNGER | Armstrong County, PA | Gas Property | Dec 2023 |
| 593 | UPPERMAN | Armstrong County, PA | Gas Property | Dec 2023 |
| 594 | V L BOYER | Armstrong County, PA | Gas Property | Dec 2023 |
| 595 | V R DOUGHERTY ETAL | Armstrong County, PA | Gas Property | Dec 2023 |
| 596 | V. U. MEGNIN | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 597 | VANPORT | Armstrong County, PA | Gas Property | Dec 2023 |
| 598 | VERNON BOYER | Armstrong County, PA | Gas Property | Dec 2023 |
| 599 | VIGO 00 | Armstrong County, PA | Gas Property | Dec 2023 |
| 600 | VIRAG | Armstrong County, PA | Gas Property | Dec 2023 |