| 301 | CLAIR E. WALTERMIRE | Indiana County, PA | Gas Property | Dec 2023 |
| 302 | CLAIR FULMER | Indiana County, PA | Oil & Gas Property | Dec 2023 |
| 303 | CLAIR L. FRYE | Westmoreland County, PA | Gas Property | Dec 2023 |
| 304 | CLAIR SWEITZER | Clarion County, PA | Gas Property | Dec 2023 |
| 305 | CLAPP TRACT | Forest County, PA | Oil & Gas Property | Dec 2023 |
| 306 | CLAPPER | Susquehanna County, PA | Gas Property | Sep 2023 |
| 307 | CLARA | Potter County, PA | Oil & Gas Property | Dec 2022 |
| 308 | CLARA D SEANOR | Westmoreland County, PA | Gas Property | Dec 2023 |
| 309 | CLARA E RUGH (FMLY J | Indiana County, PA | Gas Property | Dec 2023 |
| 310 | CLARA JACQUES | Fayette County, PA | Gas Property | Dec 2016 |
| 311 | CLARE MARSHALL | Indiana County, PA | Gas Property | Dec 2023 |
| 312 | CLARENCE | Indiana County, PA | Oil & Gas Property | Dec 2023 |
| 313 | CLARENCE A KEISER | Clearfield County, PA | Gas Property | Dec 2023 |
| 314 | CLARENCE HOOD A10 | Forest County, PA | Oil & Gas Property | Dec 2023 |
| 315 | CLARENCE V & HELEN M BOYD | Erie County, PA | Gas Property | Dec 2022 |
| 316 | CLARK | Armstrong County, PA | Gas Property | Dec 2023 |
| 317 | CLARK | Mercer County, PA | Gas Property | Dec 2023 |
| 318 | CLARK | Clarion County, PA | Gas Property | Dec 2023 |
| 319 | CLARK | Fayette County, PA | Oil & Gas Property | Dec 2023 |
| 320 | CLARK | Warren County, PA | Oil & Gas Property | Dec 2023 |
| 321 | CLARK | Indiana County, PA | Gas Property | Dec 2023 |
| 322 | CLARK & ARMOUR | Warren County, PA | Oil & Gas Property | Dec 2023 |
| 323 | CLARK & ARMOUR US DEPT | Warren County, PA | Oil & Gas Property | Dec 2023 |
| 324 | CLARK 486 | Tioga County, PA | Gas Property | Feb 2024 |
| 325 | CLARK 65 | Greene County, PA | Oil & Gas Property | Dec 2023 |
| 326 | CLARK B MCLAUGHLIN | Indiana County, PA | Gas Property | Dec 2023 |
| 327 | CLARK E RICH DC ETAL | Clearfield County, PA | Gas Property | Dec 2023 |
| 328 | CLARK KLECKNER | Bradford County, PA | Gas Property | Feb 2024 |
| 329 | CLARK UNIT | Susquehanna County, PA | Gas Property | Feb 2024 |
| 330 | CLARK WHITACRE | Armstrong County, PA | Gas Property | Dec 2023 |
| 331 | CLARKE | Bradford County, PA | Gas Property | Feb 2024 |
| 332 | CLARKE | Fayette County, PA | Oil & Gas Property | Feb 2024 |
| 333 | CLAUDE | Susquehanna County, PA | Gas Property | Feb 2024 |
| 334 | CLAUDE F HORNE | Clinton County, PA | Gas Property | Dec 2023 |
| 335 | CLAUDIA | Bradford County, PA | Gas Property | Feb 2024 |
| 336 | CLAWSON | Westmoreland County, PA | Gas Property | Dec 2023 |
| 337 | CLAWSON | Indiana County, PA | Oil & Gas Property | Dec 2023 |
| 338 | CLAY PIT | McKean County, PA | Oil & Gas Property | Dec 2023 |
| 339 | CLAYPOOLE | Armstrong County, PA | Gas Property | Feb 2024 |
| 340 | CLAYSVILLE SPORTSMANS UNIT | Washington County, PA | Gas Property | Feb 2024 |
| 341 | CLAYTON E ELKIN ET AL | Indiana County, PA | Gas Property | Dec 2023 |
| 342 | CLAYTON ELKIN | Indiana County, PA | Gas Property | Dec 2023 |
| 343 | CLAYTON MILLER | Indiana County, PA | Gas Property | Dec 2022 |
| 344 | CLAYTON SUNDERLAND | Indiana County, PA | Gas Property | Dec 2023 |
| 345 | CLDC (02-17 | Tioga County, PA | Gas Property | Feb 2024 |
| 346 | CLEAR CREEK STATE FOREST | Jefferson County, PA | Gas Property | Feb 2024 |
| 347 | CLEAR RUN STATE FOREST | Jefferson County, PA | Oil & Gas Property | Dec 2023 |
| 348 | CLEAR SPRING DAIRY | Bradford County, PA | Gas Property | Feb 2024 |
| 349 | CLEARFIELD & JEFFERSON | Clearfield County, PA | Gas Property | Dec 2023 |
| 350 | CLEARFIELD BITUMINOUS COAL CO | Indiana County, PA | Oil & Gas Property | Dec 2023 |
| 351 | CLEARFIELD BITUMINOUS COAL CO | Indiana County, PA | Gas Property | Dec 2023 |
| 352 | CLEARFIELD/BITUM | Cambria County, PA | Oil & Gas Property | Dec 2023 |
| 353 | CLEARVIEW HUNTING CLUB A | Lycoming County, PA | Gas Property | Feb 2024 |
| 354 | CLEGG 722 | Lycoming County, PA | Gas Property | Feb 2024 |
| 355 | CLEMMER | Fayette County, PA | Gas Property | Dec 2023 |
| 356 | CLEPPER | Armstrong County, PA | Gas Property | Feb 2024 |
| 357 | CLIFFORD GLAS | Forest County, PA | Oil & Gas Property | Dec 2023 |
| 358 | CLIFFORD H HUFFMAN | Armstrong County, PA | Gas Property | Dec 2023 |
| 359 | CLIFFORD MAZE | Warren County, PA | Oil & Gas Property | Dec 2020 |
| 360 | CLIFFORD P. FLEMING | Indiana County, PA | Gas Property | Dec 2023 |
| 361 | CLINE | Monongalia County, WV | Gas Property | Feb 2024 |
| 362 | CLINGER | Forest County, PA | Oil & Gas Property | Dec 2023 |
| 363 | CLINGERMAN-THOMAS UNIT | Washington County, PA | Oil & Gas Property | Feb 2024 |
| 364 | CLINTON | Elk County, PA | Oil & Gas Property | Dec 2017 |
| 365 | CLINTON VANHORN | Armstrong County, PA | Gas Property | Dec 2023 |
| 366 | CLOPP | Elk County, PA | Oil & Gas Property | Dec 2023 |
| 367 | CLOSSER SULLIVAN | Warren County, PA | Oil & Gas Property | Dec 2021 |
| 368 | CLOUGH LANDS TRUST WARRANT 5 | Forest County, PA | Oil & Gas Property | Dec 2014 |
| 369 | CLOUGH LEASE | Warren County, PA | Oil & Gas Property | Dec 2022 |
| 370 | CLOUSE UNIT | Butler County, PA | Oil & Gas Property | Feb 2024 |
| 371 | CLUTTER WFN3 | Washington County, PA | Oil & Gas Property | Feb 2024 |
| 372 | CLYDE BROWN | Armstrong County, PA | Gas Property | Dec 2023 |
| 373 | CLYDE BURNHAM | Erie County, PA | Gas Property | Dec 2023 |
| 374 | CLYDE MCCONNAUGHEY JR | Indiana County, PA | Gas Property | Dec 2023 |
| 375 | CLYDE MOHNEY | Jefferson County, PA | Gas Property | Dec 2023 |
| 376 | CLYDE MUTH (M-631) 8 | Clearfield County, PA | Gas Property | Dec 2023 |
| 377 | CM STORMER | Jefferson County, PA | Gas Property | Dec 2023 |
| 378 | CNR EAST W | McKean County, PA | Oil & Gas Property | Dec 2023 |
| 379 | CNX GAS COMPANY | Marshall County, WV | Oil & Gas Property | Feb 2024 |
| 380 | CNX GH35 | Greene County, PA | Gas Property | Feb 2024 |
| 381 | CNX LAND LLC RHL31 | Greene County, PA | Gas Property | Feb 2024 |
| 382 | CNX MAJ12 | Greene County, PA | Gas Property | Feb 2024 |
| 383 | CNX MOR31 | Washington County, PA | Gas Property | Feb 2024 |
| 384 | CNX NV110 | Washington County, PA | Gas Property | Feb 2024 |
| 385 | CNX RHL | Greene County, PA | Gas Property | Feb 2024 |
| 386 | CNX RHL | Greene County, PA | Gas Property | Feb 2024 |
| 387 | CNX RHL4 | Greene County, PA | Gas Property | Feb 2024 |
| 388 | COASTAL | Fayette County, PA | Gas Property | Feb 2024 |
| 389 | COATES | Warren County, PA | Oil & Gas Property | Dec 2023 |
| 390 | COATES | Bradford County, PA | Gas Property | Feb 2024 |
| 391 | COATES SC | Warren County, PA | Oil Property | Dec 2016 |
| 392 | COBB | McKean County, PA | Oil & Gas Property | Dec 2023 |
| 393 | COBB | Warren County, PA | Oil & Gas Property | Dec 2022 |
| 394 | COBURN | Venango County, PA | Oil Property | Dec 2020 |
| 395 | COCHRAN | Jefferson County, PA | Gas Property | Dec 2023 |
| 396 | COCHRAN | Warren County, PA | Oil & Gas Property | Dec 2023 |
| 397 | COCHRAN | Warren County, PA | Oil & Gas Property | Dec 2023 |
| 398 | COCHRAN | Fayette County, PA | Gas Property | Feb 2024 |
| 399 | COCHRAN | Venango County, PA | Oil & Gas Property | Dec 2021 |
| 400 | COCHRAN | Tioga County, PA | Gas Property | Feb 2024 |