| MMMDL Manufacturing Industries, Inc | Bedford | PA | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| MMMechanicsb-3mus-3m Mechanicsb | Mechanicsburg | PA | Miscellaneous Manufacturing339113 | 1-19 | ◐ LIKELY ACTIVE |
| MUMersen USA GS - ACT Corp. | Topton | PA | Machinery Manufacturing333994 | 1-19 | ◐ LIKELY ACTIVE |
| MUMersen USA GS - GMI Corp - Robesonia | Robesonia | PA | Electrical Equipment, Appliance & Component Manufacturing335991 | 1-19 | ◐ LIKELY ACTIVE |
| MMetalac | Latrobe | PA | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| MPMetallurgical Products Company | West Chester | PA | Primary Metal Manufacturing331420 | 1-19 | ◐ LIKELY ACTIVE |
| MTMicrochip Technology Inc. Norristown | Norristown | PA | Computer and Electronic Product Manufacturing334413 | 1-19 | ◐ LIKELY ACTIVE |
| MMiddlesex | W. Middlesex | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| MOMidland Operations | Midland | PA | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| MMMini Melts USA - Cranberry Township Depot | Cranberry Township | PA | Food Manufacturing311520 | 1-19 | ◐ LIKELY ACTIVE |
| MAMoyer and Son, Inc. | Souderton | PA | Food Manufacturing311119 | 1-19 | ◐ LIKELY ACTIVE |
| MPMt. Pleasant | Mount Pleasant | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| MPMt. Pleasant | Mt. Pleasant | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| NCNational Chemical Laboratories Distribution Center | Philadelphia | PA | Chemical Manufacturing325611 | 1-19 | ◐ LIKELY ACTIVE |
| NCNatural Concrete Products - PA location | East Butler | PA | Nonmetallic Mineral Product Manufacturing327331 | 1-19 | ◐ LIKELY ACTIVE |
| NBNew Brighton | New Brighton | PA | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| NCNew Castle Pa Ewp 707 | New Castle | PA | Wood Product Manufacturing321214 | 1-19 | ◐ LIKELY ACTIVE |
| NHNew Hudson Facades - Aston | Aston | PA | Fabricated Metal Product Manufacturing332323 | 1-19 | ◐ LIKELY ACTIVE |
| NPN.E.W. Plastics Corp - PA East Warehouse | Lancaster | PA | Fabricated Metal Product Manufacturing332311 | 1-19 | ◐ LIKELY ACTIVE |
| NPN.E.W. Plastics Corp - PA Renew | Newmanstown | PA | Furniture and Related Product Manufacturing337110 | 1-19 | ◐ LIKELY ACTIVE |
| NPN.E.W. Plastics Corp - PA Warehouse - Punxy | Punxsutawney | PA | Fabricated Metal Product Manufacturing332311 | 1-19 | ◐ LIKELY ACTIVE |
| NCNewterra Corporation, INC Bridgeville | Bridgeville | PA | Machinery Manufacturing333310 | 1-19 | ◐ LIKELY ACTIVE |
| NCNewterra Corporation, INC Trooper | Trooper | PA | Machinery Manufacturing333310 | 1-19 | ◐ LIKELY ACTIVE |
| NTNexpera Tamaqua | Tamaqua | PA | Chemical Manufacturing325180 | 1-19 | ◐ LIKELY ACTIVE |
| NINF&M International, Inc. | Monaca | PA | Primary Metal Manufacturing331491 | 1-19 | ◐ LIKELY ACTIVE |
| NSNF String & Son Inc hop | York Haven | PA | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| NCNitro Cutting Services, LLC | Manheim | PA | Fabricated Metal Product Manufacturing332313 | 1-19 | ◐ LIKELY ACTIVE |
| NANORTH AMERICAN STAINLESS-Wrightsville | Whrightsville | PA | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| NSNortheast Service Center | Lewisberry | PA | Machinery Manufacturing333922 | 1-19 | ◐ LIKELY ACTIVE |
| NRNottingham RMC Plant | Nottingham | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| OTOPTA-Edgar Thomson | Braddock | PA | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| OHOrmrod HMA Plant | Coplay | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| PPPacer Pumps | Lancaster | PA | Machinery Manufacturing333911 | 1-19 | ◐ LIKELY ACTIVE |
| PPParadise PA Millwork | Paradise | PA | Furniture and Related Product Manufacturing337212 | 1-19 | ◐ LIKELY ACTIVE |
| PPParadise PA Truss | Paradise | PA | Wood Product Manufacturing321215 | 1-19 | ◐ LIKELY ACTIVE |
| PFParker Ford | Parker Ford | PA | Nonmetallic Mineral Product Manufacturing327331 | 1-19 | ◐ LIKELY ACTIVE |
| PAPCC Aerostructures | Wilkes Barre | PA | Transportation Equipment Manufacturing336412 | 1-19 | ◐ LIKELY ACTIVE |
| PAPCC Aerostructures | Wilkes-Barre | PA | Transportation Equipment Manufacturing336412 | 1-19 | ◐ LIKELY ACTIVE |
| PHPenn Hills | Verona | PA | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| PPPenn Pallet Inc / Pant 2 | Saint Marys | PA | Wood Product Manufacturing321920 | 1-19 | ◐ LIKELY ACTIVE |
| PPPenn Pallet Mt. Jewett | Mt. Jewett | PA | Wood Product Manufacturing321920 | 1-19 | ◐ LIKELY ACTIVE |
Penn United Technologies, Inc. (Warminster Location) | Warminster | PA | Plastics and Rubber Products Manufacturing326199 | 1-19 | ◐ LIKELY ACTIVE |
| PFPerryman Frackville Operations | Frackville | PA | Primary Metal Manufacturing331491 | 1-19 | ◐ LIKELY ACTIVE |
Peters' Heat Treating, Inc. McKean | Mckean | PA | Fabricated Metal Product Manufacturing332811 | 1-19 | ◐ LIKELY ACTIVE |
| PCPhoenix Contact USA - Commerce Drive | Middletown | PA | Furniture and Related Product Manufacturing337215 | 1-19 | ◐ LIKELY ACTIVE |
| PBPittsburgh Branch | Houston | PA | Food Manufacturing311520 | 1-19 | ◐ LIKELY ACTIVE |
| PCPittston Co-Packers - Pittston Manufacturing Facility | Pittston | PA | Beverage and Tobacco Product Manufacturing312111 | 1-19 | ◐ LIKELY ACTIVE |
| PGPleasant Gap Branch 42 | Pleasant Gap | PA | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| PPlum | Pittsburgh | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| PFPrecision Feedscrews, Inc. | New Castle | PA | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |