| AUAdvance USA | New Stanton | PA | Plastics and Rubber Products Manufacturing326121 | — | ◇ UNVERIFIED |
| ASAdvantage Sales Ltp | Lock Haven | PA | Transportation Equipment Manufacturing336340 | — | ◇ UNVERIFIED |
| APAe Polysilicon CORP. | Fairless Hills | PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| AIAffival INC | Oakmont | PA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| AFAgc Flat Glass North America Quakertown Facility | Quakertown | PA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| ACAge Craft Mfg INC | Greensburg | PA | Fabricated Metal Product Manufacturing332322 | 1-19 | ◇ UNVERIFIED |
| ASAgere Systems Inc/allentown | Allentown | PA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| ASAgere Systems Inc/reading Facility | Reading | PA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| ANAgfa Ndt INC | Lewistown | PA | Computer and Electronic Product Manufacturing334513 | — | ◇ UNVERIFIED |
| ARAg-met Refining CORP | Delano | PA | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| ATAgraco Technologies International | Dillsburg | PA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| ACAgric Commodities Fertilizer Plt | Gettysburg | PA | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| APAgsalt Processing LLC | Gettysburg | PA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| ACAilya Chemical LTD LLC | Mount Pocono | PA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| ALAir Liquide America CORP Coatesville Asu | Coatesville | PA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| APAir Prod & Chem | Morrisville | PA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| APAir Products and Chemicals, INC. | Creighton | PA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| APAir Products & Chemicals INC | Lancaster | PA | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| AIAirtek Inc/north Huntingdon Plt | North Huntingdon | PA | Machinery Manufacturing333994 | — | ◇ UNVERIFIED |
| ANAkers Natl Roll Co/hyde Park Foundry | Hyde Park | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ASAk Steel Butler Works | Butler | PA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| AAAldan Acquisition CORP | Danville | PA | Plastics and Rubber Products Manufacturing326299 | — | ◇ UNVERIFIED |
| ALAlfa Laval Heat Plt | Lykens | PA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| ALAlfa Laval Separation/warminster | Warminster | PA | Machinery Manufacturing333248 | — | ◇ UNVERIFIED |
| AMAliquippa Metal Recovery/slag Processing | Aliquippa | PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| AMAll-brite Metal Finishing INC | Philadelphia | PA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| ACAllegheny Chemical CORP | Ridgway | PA | Chemical Manufacturing325100 | — | ◇ UNVERIFIED |
| ACAllegheny Coatings Servidea Dr Fac/elk | Ridgeway | PA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum Bagdad | Leechburg | PA | Paper Manufacturing322290 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum CORP | Houston | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum Cor/washington Flatroll | Washington | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum Llc/houston Fitch Works | Houston | PA | Primary Metal Manufacturing331100 | — | ◇ UNVERIFIED |
| AMAllegheny Mfg & Elec/ferndale | Johnstown | PA | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| ARAllegheny River Term/new Kensington Crushing Plt | New Kensington | PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| ASAllegheny Store Fixtures | Bradford | PA | Furniture and Related Product Manufacturing337211 | — | ◇ UNVERIFIED |
| AMAllegro Micro Sys Inc/willow Grove | Willow Grove | PA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| ARAlliance Remfg | Philadelphia | PA | Machinery Manufacturing333995 | — | ◇ UNVERIFIED |
| AMAll Metals Recycling LLC | Rochester | PA | Machinery Manufacturing333519 | — | ◇ UNVERIFIED |
| AFAlloy Fabrication INC | Reading | PA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| ASAlloy Surfaces CO INC | Boothwyn | PA | Fabricated Metal Product Manufacturing332114 | — | ◇ UNVERIFIED |
| ASAll Steel INC | West Hazleton | PA | Transportation Equipment Manufacturing336210 | — | ◇ UNVERIFIED |
| APAlstom Power INC | Easton | PA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| AIAltec Ind Inc/plains | Plains | PA | Transportation Equipment Manufacturing336110 | — | ◇ UNVERIFIED |
| AAAltoona Area Sch Dist/altoona High Sch | Altoona | PA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| AMAltoona Mirror | Altoona | PA | Printing and Related Support Activities323117 | — | ◇ UNVERIFIED |
| AAAmer Atelier Mfg | Allentown | PA | Furniture and Related Product Manufacturing337211 | — | ◇ UNVERIFIED |
| ABAmer Biodiesel Energy/erie | Erie | PA | Machinery Manufacturing333613 | — | ◇ UNVERIFIED |
| ABAmer Bridge Holding Co/coraopolis | Coraopolis | PA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| ACAmer Color Graphics Dba Vertis Communications/york | York | PA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| ACAmer Contract Sys Zelienople | Zelienople | PA | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
