| 301 | ATCHESON 59 | Greene County, PA | Gas Property | Jan 2025 |
| 302 | ATGAS | Bradford County, PA | Gas Property | Jan 2025 |
| 303 | ATHENA | Westmoreland County, PA | Gas Property | Jan 2025 |
| 304 | ATKINSON | Venango County, PA | Gas Property | Dec 2024 |
| 305 | ATLANTIC CITY ELECTRIC COMPANY | Armstrong County, PA | Gas Property | Dec 2024 |
| 306 | ATLANTIC CRUSHED COKE | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 307 | ATLANTIS | McKean County, PA | Oil & Gas Property | Dec 2014 |
| 308 | ATLAS POWDER | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 309 | AUEN | Indiana County, PA | Gas Property | Dec 2024 |
| 310 | AUGUSTINE | Susquehanna County, PA | Gas Property | Jan 2025 |
| 311 | AUGUSTINE GEORGE 11039 | Washington County, PA | Gas Property | Jan 2025 |
| 312 | AUKEMA | Wyoming County, PA | Gas Property | Jan 2025 |
| 313 | AUSTIN | Armstrong County, PA | Gas Property | Jan 2025 |
| 314 | AUSTIN DUNLAP | Clearfield County, PA | Gas Property | Dec 2024 |
| 315 | AUSTIN E 00 | Susquehanna County, PA | Gas Property | Jan 2025 |
| 316 | AVELLA LAND VENTURES UNIT | Washington County, PA | Gas Property | Jan 2025 |
| 317 | AVERILL | Warren County, PA | Gas Property | Dec 2024 |
| 318 | AVERY A 212 | Tioga County, PA | Gas Property | Jan 2025 |
| 319 | AYERS 05 005 0 | Bradford County, PA | Gas Property | Jan 2025 |
| 320 | AYERS UNIT AYERS | Wyoming County, PA | Gas Property | Jan 2025 |
| 321 | AYERS UNIT MATTOCKS 1 AYERS 1H | Wyoming County, PA | Gas Property | Jan 2025 |