| ASAmetek Specialty Metal Prod Div | Eighty Four | PA | Fabricated Metal Product Manufacturing332114 | — | ◐ LIKELY ACTIVE |
| APAmetek/westchester Plastics Div | Nesquehoning | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
Amrize Cement Inc/whitehall Plt | Whitehall | PA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| ASAmthor Steel | Erie | PA | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| APAmt Pump Company | Royersford | PA | Machinery Manufacturing333911 | 20-99 | ◐ LIKELY ACTIVE |
| AIAndritz Inc/muncy Foundry | Muncy | PA | Machinery Manufacturing333243 | — | ◐ LIKELY ACTIVE |
| AIAnro, INC. | West Chester | PA | Printing and Related Support Activities323111 | 100-499 | ◐ LIKELY ACTIVE |
| AIAnthracite Industries INC | Sunbury | PA | Petroleum and Coal Products Manufacturing324199 | — | ◐ LIKELY ACTIVE |
| AMApollo Metals LTD | Bethlehem | PA | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| ACAquatic Co/w Donegal Twp | Elizabethtown | PA | Apparel Manufacturing315291 | — | ◐ LIKELY ACTIVE |
| AMArcelormittal Monessen Coke Plant | Monessen | PA | Petroleum and Coal Products Manufacturing324199 | — | ◐ LIKELY ACTIVE |
| APArcelormittal Plate LLC - Coatesville Facility | Coatesville | PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| APArcelormittal Plate LLC Conshohocken Facility | Conshohocken | PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| ASArcelormittal Steelton LLC | Steelton | PA | Wood Product Manufacturing321110 | — | ◐ LIKELY ACTIVE |
| AIArkema INC. | Bristol | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| ACArmstrong Cement & Supply - Winfield | Cabot | PA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| ALArxada LLC | Williamsport | PA | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| ASAshland Specialty Chemical Co.- Neville Island, Pa | Pittsburgh | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| AFAsk Foods, INC. West Plant | Palmyra | PA | Food Manufacturing311991 | 100-499 | ◐ LIKELY ACTIVE |
| AHAsm Holdco Inc/contact Technologies INC | Saint Marys | PA | Nonmetallic Mineral Product Manufacturing327110 | — | ◐ LIKELY ACTIVE |
| ARAtlas Roofing Corporation | Camp Hill | PA | Plastics and Rubber Products Manufacturing326150 | — | ◐ LIKELY ACTIVE |
| ADAvery Dennison Performance Polymers | Mill Hall | PA | Chemical Manufacturing325520 | — | ◐ LIKELY ACTIVE |
| ARAvid Radiopharmaceuticals | Philadelphia | PA | Chemical Manufacturing325412 | 20-99 | ◐ LIKELY ACTIVE |
| BSBainbridge Soy Crush Plant | Marietta | PA | Food Manufacturing311224 | 20-99 | ◐ LIKELY ACTIVE |
| BCBasf CORP | Monaca | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| BEBasf Evans City Ops | Evans City | PA | Chemical Manufacturing325130 | — | ◐ LIKELY ACTIVE |
| BIBashlin Industries INC | Grove City | PA | Leather and Allied Product Manufacturing316998 | 20-99 | ◐ LIKELY ACTIVE |
| BBB Braun Med Allentown Fac | Allentown | PA | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| BMBear Metallurgical Mfg | Butler | PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
Bedford Reinforced Plastics INC | Bedford | PA | Plastics and Rubber Products Manufacturing326130 | — | ◐ LIKELY ACTIVE |
| BZBefesa Zinc US INC | Palmerton | PA | Chemical Manufacturing325130 | — | ◐ LIKELY ACTIVE |
| BPBehr Proc Corp/allentown | Allentown | PA | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
| BMBerkley Medical Resources, INC. | Smithfield | PA | Textile Mills313312 | — | ◐ LIKELY ACTIVE |
| BTBerk Tek Llc/new Holland | New Holland | PA | Primary Metal Manufacturing331318 | — | ◐ LIKELY ACTIVE |
| BLBestway Lumber Treatment Center | Cresco | PA | Wood Product Manufacturing321114 | — | ◐ LIKELY ACTIVE |
| BBetco-easton | Easton | PA | Paper Manufacturing322219 | 20-99 | ◐ LIKELY ACTIVE |
| BABethlehem Apparatus CO INC | Hellertown | PA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| BEBethlehem Energy Center | Bethlehem | PA | Food Manufacturing311314 | — | ◐ LIKELY ACTIVE |
| BSBickel's Snack Foods, Incorporated | York | PA | Food Manufacturing311919 | 100-499 | ◐ LIKELY ACTIVE |
| BPBluescope Prefab Bldg Mfg Annville | Annville | PA | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
Bollman Hat Company | Adamstown | PA | Apparel Manufacturing315250 | — | ◐ LIKELY ACTIVE |
| BABonsal American INC | Bristol | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| BFBoyertown Foundry Company | New Berlinville | PA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| BABraskem Amer Inc/marcus Hook | Marcus Hook | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
Bridesburg Foundry Co/whitehall | Whitehall | PA | Primary Metal Manufacturing331420 | — | ◐ LIKELY ACTIVE |
| BABridon American CORP | Wilkes Barre | PA | Fabricated Metal Product Manufacturing332618 | — | ◐ LIKELY ACTIVE |
| BLBrightsmith Llc/falls Twp | Morrisville | PA | Primary Metal Manufacturing331512 | — | ◐ LIKELY ACTIVE |
| BSBvpv Styrenics LLC - Beaver Cnty | Monaca | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| BTBwise Trailers | Chambersburg | PA | Transportation Equipment Manufacturing336212 | — | ◐ LIKELY ACTIVE |
Calgon Carbon CORP - Neville Island Plt | Pittsburgh | PA | Chemical Manufacturing325110 | — | ◐ LIKELY ACTIVE |