| 301 | RINGGOLD MINES INC. UNIT NO. 1 | Armstrong County, PA | Gas Property | Dec 2024 |
| 302 | RINGGOLD SPORTSMEN ASSOC | Jefferson County, PA | Gas Property | Dec 2024 |
| 303 | RINKHOFF AGRIC ENTER | Greene County, PA | Gas Property | Dec 2012 |
| 304 | RINKHOFF AGRICULTURAL ENTERPRISES LLC | Greene County, PA | Gas Property | Dec 2016 |
| 305 | RIPPLE | Armstrong County, PA | Gas Property | Dec 2024 |
| 306 | RISTAU | Warren County, PA | Oil & Gas Property | Dec 2015 |
| 307 | RITCHEY | Venango County, PA | Oil Property | Dec 1997 |
| 308 | RITCHEY UNIT | Blair County, PA | Gas Property | Mar 2025 |
| 309 | RITENOUR | Westmoreland County, PA | Gas Property | Mar 2025 |
| 310 | RITTENHOUSE | Fayette County, PA | Gas Property | Dec 2024 |
| 311 | RITTER UNIT | Fayette County, PA | Gas Property | Mar 2025 |
| 312 | RITZ 03 073 0 | Bradford County, PA | Gas Property | Mar 2025 |
| 313 | RIVER | Greene County, PA | Gas Property | Mar 2025 |
| 314 | RIVER RIDGE | Venango County, PA | Oil Property | Dec 2024 |
| 315 | RIVER RIDGE DEVELOPMENT INC | Venango County, PA | Oil Property | Dec 2024 |
| 316 | RM & WB DUNN LEASE | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 317 | ROARING RUN | Armstrong County, PA | Gas Property | Dec 2024 |
| 318 | ROARING RUN UNIT | Lycoming County, PA | Gas Property | Mar 2025 |
| 319 | ROBBINS | Clearfield County, PA | Gas Property | Dec 2024 |
| 320 | ROBBINS BRA | Bradford County, PA | Gas Property | Mar 2025 |
| 321 | ROBERT | Jefferson County, PA | Gas Property | Dec 2024 |
| 322 | ROBERT | Indiana County, PA | Gas Property | Dec 2024 |
| 323 | ROBERT | Crawford County, PA | Oil & Gas Property | Dec 2024 |
| 324 | ROBERT | Armstrong County, PA | Gas Property | Dec 2024 |
| 325 | ROBERT | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 326 | ROBERT | Armstrong County, PA | Gas Property | Dec 2024 |
| 327 | ROBERT | Jefferson County, PA | Gas Property | Dec 2024 |
| 328 | ROBERT | Erie County, PA | Oil & Gas Property | Dec 2024 |
| 329 | ROBERT | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 330 | ROBERT | Armstrong County, PA | Gas Property | Dec 2024 |
| 331 | ROBERT | Jefferson County, PA | Oil & Gas Property | Dec 2024 |
| 332 | ROBERT | Warren County, PA | Gas Property | Dec 2024 |
| 333 | ROBERT | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 334 | ROBERT | Indiana County, PA | Gas Property | Dec 2024 |
| 335 | ROBERT | Indiana County, PA | Gas Property | Dec 2017 |
| 336 | ROBERT | Indiana County, PA | Gas Property | Dec 2024 |
| 337 | ROBERT | Erie County, PA | Gas Property | Dec 2024 |
| 338 | ROBERT & PAULETTE | Indiana County, PA | Gas Property | Dec 2024 |
| 339 | ROBERT A HOY | Clarion County, PA | Gas Property | Dec 2024 |
| 340 | ROBERT ALLISON L | Clarion County, PA | Gas Property | Dec 2024 |
| 341 | ROBERT BOLDIN | Indiana County, PA | Gas Property | Dec 2024 |
| 342 | ROBERT BOWERSOX | Clarion County, PA | Gas Property | Dec 2024 |
| 343 | ROBERT BOYD SPENCE | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 344 | ROBERT BURN | Clarion County, PA | Gas Property | Mar 2025 |
| 345 | ROBERT BURNS | Clarion County, PA | Gas Property | Dec 2024 |
| 346 | ROBERT BUSH | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 347 | ROBERT BUTERBAUGH | Indiana County, PA | Gas Property | Dec 2024 |
| 348 | ROBERT C ALLISON | Clarion County, PA | Gas Property | Dec 2024 |
| 349 | ROBERT C LEVIN ET UX | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 350 | ROBERT C ULMER A | Lycoming County, PA | Gas Property | Mar 2025 |
| 351 | ROBERT C. CRISSMAN | Armstrong County, PA | Gas Property | Dec 2024 |
| 352 | ROBERT C. HILLEN ETUX | Fayette County, PA | Gas Property | Dec 2024 |
| 353 | ROBERT COLEMAN | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 354 | ROBERT D | Crawford County, PA | Gas Property | Dec 2024 |
| 355 | ROBERT D | Indiana County, PA | Gas Property | Dec 2024 |
| 356 | ROBERT E PATRICK | Armstrong County, PA | Gas Property | Dec 2024 |
| 357 | ROBERT E WISSINGER | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 358 | ROBERT GRAHAM | Westmoreland County, PA | Gas Property | Dec 2024 |
| 359 | ROBERT H NEHRIG | Indiana County, PA | Gas Property | Dec 2024 |
| 360 | ROBERT HAMI | Jefferson County, PA | Gas Property | Dec 2024 |
| 361 | ROBERT HITCHCOCK | Crawford County, PA | Gas Property | Dec 1990 |
| 362 | ROBERT HOLDER | Mercer County, PA | Oil & Gas Property | Dec 2020 |
| 363 | ROBERT HOUSER | Armstrong County, PA | Gas Property | Dec 2024 |
| 364 | ROBERT J CITERONI | Indiana County, PA | Gas Property | Dec 2024 |
| 365 | ROBERT J FABIN | Indiana County, PA | Gas Property | Dec 2024 |
| 366 | ROBERT J. DILTS FMLY ROY R | Indiana County, PA | Gas Property | Dec 2024 |
| 367 | ROBERT KESTER | Clearfield County, PA | Gas Property | Dec 2023 |
| 368 | ROBERT L. CALHOUN | Armstrong County, PA | Gas Property | Dec 2024 |
| 369 | ROBERT M | Indiana County, PA | Gas Property | Dec 2024 |
| 370 | ROBERT M LENHART | Westmoreland County, PA | Gas Property | Dec 2024 |
| 371 | ROBERT MITCHELL 8 | Indiana County, PA | Gas Property | Dec 2024 |
| 372 | ROBERT MURPHY | Westmoreland County, PA | Gas Property | Dec 2024 |
| 373 | ROBERT N BROTHERS | Clearfield County, PA | Gas Property | Dec 2024 |
| 374 | ROBERT OSGOOD | McKean County, PA | Gas Property | Dec 2024 |
| 375 | ROBERT SAWYER | Clarion County, PA | Gas Property | Dec 2023 |
| 376 | ROBERT SHORTS | Washington County, PA | Oil & Gas Property | Mar 2025 |
| 377 | ROBERT SMITH | Washington County, PA | Gas Property | Jan 2025 |
| 378 | ROBERT SPENCER | Erie County, PA | Gas Property | Dec 2018 |
| 379 | ROBERT SPENCER | Clearfield County, PA | Oil & Gas Property | Dec 2024 |
| 380 | ROBERT STRONG | Indiana County, PA | Gas Property | Dec 2024 |
| 381 | ROBERT V MAINE | Jefferson County, PA | Gas Property | Dec 2024 |
| 382 | ROBERT W. GRAY FM AT | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 383 | ROBERTA B JONES | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 384 | ROBERTS | Greene County, PA | Gas Property | Dec 2015 |
| 385 | ROBERTS 59 | Greene County, PA | Gas Property | Nov 2022 |
| 386 | ROBERTS BEA | Beaver County, PA | Gas Property | Mar 2025 |
| 387 | ROBERTSON | Armstrong County, PA | Gas Property | Dec 2024 |
| 388 | ROBINHILL | Washington County, PA | Oil & Gas Property | Mar 2025 |
| 389 | ROBINSON | Susquehanna County, PA | Gas Property | Mar 2025 |
| 390 | ROBINSON | Armstrong County, PA | Gas Property | Dec 2024 |
| 391 | ROBINSON | Bradford County, PA | Gas Property | Mar 2025 |
| 392 | ROBINSON | Fayette County, PA | Oil & Gas Property | Mar 2025 |
| 393 | ROBINSON | Warren County, PA | Oil & Gas Property | Dec 2023 |
| 394 | ROBINSON 82 | Indiana County, PA | Gas Property | Dec 2024 |
| 395 | ROBINSON CAMPBELL 11132 | Washington County, PA | Gas Property | Mar 2025 |
| 396 | ROBINSON FERGUSON | Bradford County, PA | Gas Property | Mar 2025 |
| 397 | ROBY GROSE | Jefferson County, PA | Oil & Gas Property | Dec 2024 |
| 398 | ROCHESTER & PGH | Clearfield County, PA | Gas Property | Dec 2024 |
| 399 | ROCHESTER & PGH C | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 400 | ROCHESTER & PGH COAL | Jefferson County, PA | Gas Property | Dec 2024 |