| 401 | MITCHELL | Armstrong County, PA | Gas Property | Dec 2023 |
| 402 | MONTGOMERY | Armstrong County, PA | Gas Property | Aug 2019 |
| 403 | MORGAN | Armstrong County, PA | Gas Property | Dec 2023 |
| 404 | MORRIS | Armstrong County, PA | Gas Property | Dec 2023 |
| 405 | MOUNTAIN TRAILS INC | Armstrong County, PA | Gas Property | Dec 2023 |
| 406 | MT SAVAGE REF | Armstrong County, PA | Gas Property | Dec 2023 |
| 407 | MUDLICK | Armstrong County, PA | Gas Property | Nov 2024 |
| 408 | MUSKO | Armstrong County, PA | Gas Property | Dec 2023 |
| 409 | MYERS 00 | Armstrong County, PA | Gas Property | Dec 2023 |
| 410 | MYRTLE SHUMAKER | Armstrong County, PA | Gas Property | Dec 2023 |
| 411 | N R MARTIN | Armstrong County, PA | Gas Property | Dec 2023 |
| 412 | NEUMANN | Armstrong County, PA | Gas Property | Nov 2024 |
| 413 | NOLDER | Armstrong County, PA | Gas Property | Nov 2024 |
| 414 | NORRIS 00 | Armstrong County, PA | Gas Property | Dec 2023 |
| 415 | O GIBSON | Armstrong County, PA | Gas Property | Dec 2023 |
| 416 | O J KING | Armstrong County, PA | Gas Property | Dec 2023 |
| 417 | O W RIGGLE | Armstrong County, PA | Gas Property | Dec 2023 |
| 418 | OCHS/SBI | Armstrong County, PA | Gas Property | Dec 2023 |
| 419 | OESTERLING | Armstrong County, PA | Gas Property | Nov 2024 |
| 420 | OFFUTT | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 421 | ORIS M. SCHRECENGOST | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 422 | ORLANDO HARMAN | Armstrong County, PA | Gas Property | Dec 2023 |
| 423 | OSCAR EARL HOUSER | Armstrong County, PA | Gas Property | Dec 2023 |
| 424 | OTIS PROCIOUS ETAL | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 425 | P B SLEASE | Armstrong County, PA | Gas Property | Dec 2023 |
| 426 | P F RIGGLE | Armstrong County, PA | Gas Property | Dec 2023 |
| 427 | PA EAST SIDE LAND | Armstrong County, PA | Gas Property | Dec 2023 |
| 428 | PAD W09 PER-W09-3H | Armstrong County, PA | Gas Property | Nov 2024 |
| 429 | PAD W1 | Armstrong County, PA | Gas Property | Nov 2024 |
| 430 | PAD W9 PER-W09 | Armstrong County, PA | Gas Property | Nov 2024 |
| 431 | PALERMO-MCKINLEY UNIT #1 | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 432 | PAPAILA | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 433 | PARKS | Armstrong County, PA | Gas Property | Dec 2023 |
| 434 | PAUL HEILMAN | Armstrong County, PA | Gas Property | Dec 2023 |
| 435 | PAUL KING | Armstrong County, PA | Gas Property | Dec 2023 |
| 436 | PAUL WHITE | Armstrong County, PA | Gas Property | Dec 2023 |
| 437 | PAULENE C BRICE | Armstrong County, PA | Gas Property | Dec 2023 |
| 438 | PAULINE GOODHEART | Armstrong County, PA | Gas Property | Dec 2023 |
| 439 | PENN PARK DEVELOPMENT & | Armstrong County, PA | Gas Property | Dec 2023 |
| 440 | PERRY & HORNBERGER | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 441 | PETERSON | Armstrong County, PA | Gas Property | Jul 2024 |
| 442 | PHILLIPS | Armstrong County, PA | Gas Property | Dec 2023 |
| 443 | PITTS | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 444 | PITTSBURGH BRASS M | Armstrong County, PA | Gas Property | Dec 2023 |
| 445 | POLOF | Armstrong County, PA | Gas Property | Dec 2023 |
| 446 | POWELL | Armstrong County, PA | Gas Property | Dec 2023 |
| 447 | QUINN 00 | Armstrong County, PA | Gas Property | Dec 2023 |
| 448 | R & P COAL CO | Armstrong County, PA | Gas Property | Dec 2023 |
| 449 | R BARISONE | Armstrong County, PA | Gas Property | Dec 2023 |
| 450 | R CINPINSKI | Armstrong County, PA | Gas Property | Dec 2023 |
| 451 | R CLARK | Armstrong County, PA | Gas Property | Dec 2023 |
| 452 | R FULTON | Armstrong County, PA | Gas Property | Dec 2023 |
| 453 | R M MCLAUGHLIN | Armstrong County, PA | Gas Property | Dec 2023 |
| 454 | R O HUNTER | Armstrong County, PA | Gas Property | Dec 2022 |
| 455 | R S PROCIOUS | Armstrong County, PA | Gas Property | Dec 2023 |
| 456 | R STULL ET UX | Armstrong County, PA | Gas Property | Dec 2023 |
| 457 | R WESLEY SMITH | Armstrong County, PA | Gas Property | Dec 2023 |
| 458 | R WESLEY SMITH ET AL | Armstrong County, PA | Gas Property | Dec 2023 |
| 459 | R.&A. BARRETT | Armstrong County, PA | Gas Property | Dec 2023 |
| 460 | R.&S. SMITH ET AL | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 461 | RALPH MYERS | Armstrong County, PA | Gas Property | Nov 2024 |
| 462 | RALPH S WRIGHT | Armstrong County, PA | Gas Property | Dec 2023 |
| 463 | RANDY SNYDER | Armstrong County, PA | Gas Property | Dec 2023 |
| 464 | RANKIN/TOY | Armstrong County, PA | Gas Property | Dec 2023 |
| 465 | RAY G HEILMAN | Armstrong County, PA | Gas Property | Dec 2023 |
| 466 | RAY W FISCUS ETUX | Armstrong County, PA | Gas Property | Dec 2023 |
| 467 | RAYMOND | Armstrong County, PA | Gas Property | Dec 2023 |
| 468 | RAYMOND L RICHMAN | Armstrong County, PA | Gas Property | Dec 2023 |
| 469 | REDDINGER | Armstrong County, PA | Gas Property | Dec 2023 |
| 470 | REED | Armstrong County, PA | Gas Property | Dec 2023 |
| 471 | REEFER | Armstrong County, PA | Gas Property | Dec 2023 |
| 472 | REEGER | Armstrong County, PA | Gas Property | Dec 2023 |
| 473 | REESEDALE RIDGE | Armstrong County, PA | Gas Property | Nov 2024 |
| 474 | REESMAN | Armstrong County, PA | Gas Property | Dec 2023 |
| 475 | REESMAN | Armstrong County, PA | Gas Property | Dec 2023 |
| 476 | RENSHAW | Armstrong County, PA | Gas Property | Nov 2024 |
| 477 | RICHEY | Armstrong County, PA | Gas Property | Dec 2023 |
| 478 | RIDGEVIEW | Armstrong County, PA | Gas Property | Dec 2023 |
| 479 | RIFFER | Armstrong County, PA | Gas Property | Dec 2023 |
| 480 | RIGHI | Armstrong County, PA | Gas Property | Dec 2023 |
| 481 | RINGGOLD | Armstrong County, PA | Gas Property | Nov 2024 |
| 482 | RINGGOLD | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 483 | RINGGOLD MINES INC. UNIT NO. 1 | Armstrong County, PA | Gas Property | Dec 2023 |
| 484 | RIPPLE | Armstrong County, PA | Gas Property | Dec 2023 |
| 485 | ROBERT | Armstrong County, PA | Gas Property | Dec 2023 |
| 486 | ROBERT | Armstrong County, PA | Gas Property | Dec 2023 |
| 487 | ROBERT | Armstrong County, PA | Gas Property | Dec 2023 |
| 488 | ROBERT | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 489 | ROBERT C. CRISSMAN | Armstrong County, PA | Gas Property | Dec 2023 |
| 490 | ROBERT E PATRICK | Armstrong County, PA | Gas Property | Dec 2023 |
| 491 | ROBERT HOUSER | Armstrong County, PA | Gas Property | Dec 2023 |
| 492 | ROBERT L. CALHOUN | Armstrong County, PA | Gas Property | Dec 2023 |
| 493 | ROBERTSON | Armstrong County, PA | Gas Property | Dec 2023 |
| 494 | ROBINSON | Armstrong County, PA | Gas Property | Dec 2023 |
| 495 | ROCHESTER & PGH COAL | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 496 | ROCHESTER & PITTSBURG | Armstrong County, PA | Gas Property | Dec 2023 |
| 497 | ROCHESTER & PITTSBURGH COAL CO | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 498 | ROCK FURNA | Armstrong County, PA | Gas Property | Dec 2023 |
| 499 | ROGER H CLAYPOOLE ETUX | Armstrong County, PA | Gas Property | Nov 2024 |
| 500 | ROLLING HILLS | Armstrong County, PA | Gas Property | Nov 2024 |