| 301 | CIRCLE H | Bradford County, PA | Gas Property | May 2025 |
| 302 | CIRCLE Z BRA | Bradford County, PA | Gas Property | Dec 2024 |
| 303 | CITRO | Greene County, PA | Gas Property | May 2025 |
| 304 | CITY OF DUBOIS | Clearfield County, PA | Gas Property | Dec 2024 |
| 305 | CITY OF DUBOIS N | Clearfield County, PA | Gas Property | Dec 2024 |
| 306 | CK HAWTHORNE | Jefferson County, PA | Gas Property | Dec 2024 |
| 307 | CLAIR | Jefferson County, PA | Gas Property | Dec 2024 |
| 308 | CLAIR B | Indiana County, PA | Gas Property | Dec 2024 |
| 309 | CLAIR CRATTY | Butler County, PA | Gas Property | May 2025 |
| 310 | CLAIR E. WALTERMIRE | Indiana County, PA | Gas Property | Dec 2024 |
| 311 | CLAIR FULMER | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 312 | CLAIR L. FRYE | Westmoreland County, PA | Gas Property | Dec 2024 |
| 313 | CLAIR SWEITZER | Clarion County, PA | Gas Property | Dec 2024 |
| 314 | CLAPP TRACT | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 315 | CLAPPER | Susquehanna County, PA | Gas Property | May 2025 |
| 316 | CLARA | Potter County, PA | Oil & Gas Property | Dec 2024 |
| 317 | CLARA D SEANOR | Westmoreland County, PA | Gas Property | Dec 2024 |
| 318 | CLARA E RUGH (FMLY J | Indiana County, PA | Gas Property | Dec 2024 |
| 319 | CLARA JACQUES | Fayette County, PA | Gas Property | Dec 2016 |
| 320 | CLARE MARSHALL | Indiana County, PA | Gas Property | Dec 2024 |
| 321 | CLARENCE | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 322 | CLARENCE A KEISER | Clearfield County, PA | Gas Property | Dec 2024 |
| 323 | CLARENCE HOOD A10 | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 324 | CLARENCE V & HELEN M BOYD | Erie County, PA | Gas Property | Dec 2024 |
| 325 | CLARK | Armstrong County, PA | Gas Property | Dec 2024 |
| 326 | CLARK | Mercer County, PA | Gas Property | Dec 2024 |
| 327 | CLARK | Clarion County, PA | Gas Property | Dec 2024 |
| 328 | CLARK | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 329 | CLARK | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 330 | CLARK | Indiana County, PA | Gas Property | Dec 2024 |
| 331 | CLARK & ARMOUR | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 332 | CLARK & ARMOUR US DEPT | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 333 | CLARK 486 | Tioga County, PA | Gas Property | May 2025 |
| 334 | CLARK 65 | Greene County, PA | Oil & Gas Property | Dec 2024 |
| 335 | CLARK B MCLAUGHLIN | Indiana County, PA | Gas Property | Dec 2024 |
| 336 | CLARK E RICH DC ETAL | Clearfield County, PA | Gas Property | Dec 2024 |
| 337 | CLARK KLECKNER | Bradford County, PA | Gas Property | May 2025 |
| 338 | CLARK UNIT | Susquehanna County, PA | Gas Property | May 2025 |
| 339 | CLARK WHITACRE | Armstrong County, PA | Gas Property | Dec 2024 |
| 340 | CLARKE | Bradford County, PA | Gas Property | May 2025 |
| 341 | CLARKE | Fayette County, PA | Oil & Gas Property | May 2025 |
| 342 | CLAUDE | Susquehanna County, PA | Gas Property | May 2025 |
| 343 | CLAUDE F HORNE | Clinton County, PA | Gas Property | Dec 2024 |
| 344 | CLAUDIA | Bradford County, PA | Gas Property | May 2025 |
| 345 | CLAWSON | Westmoreland County, PA | Gas Property | Dec 2024 |
| 346 | CLAWSON | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 347 | CLAY PIT | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 348 | CLAYPOOLE | Armstrong County, PA | Gas Property | May 2025 |
| 349 | CLAYSVILLE SPORTSMANS UNIT | Washington County, PA | Gas Property | May 2025 |
| 350 | CLAYTON E ELKIN ET AL | Indiana County, PA | Gas Property | Dec 2024 |
| 351 | CLAYTON ELKIN | Indiana County, PA | Gas Property | Dec 2024 |
| 352 | CLAYTON MILLER | Indiana County, PA | Gas Property | Dec 2022 |
| 353 | CLAYTON SUNDERLAND | Indiana County, PA | Gas Property | Dec 2024 |
| 354 | CLDC (02-17 | Tioga County, PA | Gas Property | May 2025 |
| 355 | CLEAR CREEK STATE FOREST | Jefferson County, PA | Gas Property | May 2025 |
| 356 | CLEAR RUN STATE FOREST | Jefferson County, PA | Oil & Gas Property | Dec 2024 |
| 357 | CLEAR SPRING DAIRY | Bradford County, PA | Gas Property | May 2025 |
| 358 | CLEARFIELD & JEFFERSON | Clearfield County, PA | Gas Property | Dec 2024 |
| 359 | CLEARFIELD BITUMINOUS COAL CO | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 360 | CLEARFIELD BITUMINOUS COAL CO | Indiana County, PA | Gas Property | Dec 2024 |
| 361 | CLEARFIELD/BITUM | Cambria County, PA | Oil & Gas Property | Dec 2024 |
| 362 | CLEARVIEW HUNTING CLUB A | Lycoming County, PA | Gas Property | May 2025 |
| 363 | CLEGG 722 | Lycoming County, PA | Gas Property | May 2025 |
| 364 | CLEMENTE | Greene County, PA | Gas Property | May 2025 |
| 365 | CLEMMER | Fayette County, PA | Gas Property | Dec 2024 |
| 366 | CLEPPER | Armstrong County, PA | Gas Property | May 2025 |
| 367 | CLIFFORD & CLETUS TROYER | Erie County, PA | Gas Property | Dec 2019 |
| 368 | CLIFFORD GLAS | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 369 | CLIFFORD H HUFFMAN | Armstrong County, PA | Gas Property | Dec 2024 |
| 370 | CLIFFORD MAZE | Warren County, PA | Oil & Gas Property | Dec 2020 |
| 371 | CLIFFORD P. FLEMING | Indiana County, PA | Gas Property | Dec 2024 |
| 372 | CLINE | Monongalia County, WV | Gas Property | May 2025 |
| 373 | CLINGER | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 374 | CLINGERMAN-THOMAS UNIT | Washington County, PA | Oil & Gas Property | May 2025 |
| 375 | CLINTON | Elk County, PA | Oil & Gas Property | Dec 2017 |
| 376 | CLINTON VANHORN | Armstrong County, PA | Gas Property | Dec 2024 |
| 377 | CLOPP | Elk County, PA | Oil & Gas Property | Dec 2024 |
| 378 | CLOSSER SULLIVAN | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 379 | CLOUGH LANDS TRUST WARRANT 5 | Forest County, PA | Oil & Gas Property | Dec 2014 |
| 380 | CLOUGH LEASE | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 381 | CLOUSE UNIT | Butler County, PA | Oil & Gas Property | May 2025 |
| 382 | CLUTTER WFN3 | Washington County, PA | Oil & Gas Property | May 2025 |
| 383 | CLYDE BROWN | Armstrong County, PA | Gas Property | Dec 2024 |
| 384 | CLYDE BURNHAM | Erie County, PA | Gas Property | Dec 2024 |
| 385 | CLYDE MCCONNAUGHEY JR | Indiana County, PA | Gas Property | Dec 2024 |
| 386 | CLYDE MOHNEY | Jefferson County, PA | Gas Property | Dec 2024 |
| 387 | CLYDE MUTH (M-631) 8 | Clearfield County, PA | Gas Property | Dec 2024 |
| 388 | CM STORMER | Jefferson County, PA | Gas Property | Dec 2024 |
| 389 | CNR EAST W | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 390 | CNX GAS COMPANY | Marshall County, WV | Oil & Gas Property | May 2025 |
| 391 | CNX GH35 | Greene County, PA | Gas Property | May 2025 |
| 392 | CNX LAND LLC RHL31 | Greene County, PA | Gas Property | May 2025 |
| 393 | CNX MAJ12 | Greene County, PA | Gas Property | May 2025 |
| 394 | CNX MAM1 | Westmoreland County, PA | Gas Property | May 2025 |
| 395 | CNX MOR31 | Washington County, PA | Gas Property | May 2025 |
| 396 | CNX NV110 | Washington County, PA | Gas Property | May 2025 |
| 397 | CNX RHL | Greene County, PA | Gas Property | May 2025 |
| 398 | CNX RHL | Greene County, PA | Gas Property | May 2025 |
| 399 | CNX RHL4 | Greene County, PA | Gas Property | May 2025 |
| 400 | CNX WFN1 | Washington County, PA | Gas Property | May 2025 |