| ATAmes True Temper INC | Harrisburg | PA | Fabricated Metal Product Manufacturing332216 | — | ◐ LIKELY ACTIVE |
| 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 |
| AEAnderson Electronics LLC | Hollidaysburg | PA | Computer and Electronic Product Manufacturing334419 | 20-99 | ◐ LIKELY ACTIVE |
| AIAndritz Inc/muncy Foundry | Muncy | PA | Machinery Manufacturing333243 | — | ◐ LIKELY ACTIVE |
| ATApex Tool Group Campbell Operations | York | PA | Fabricated Metal Product Manufacturing332212 | — | ◐ LIKELY ACTIVE |
| AMApollo Metals LTD | Bethlehem | PA | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| ASApplied Separations, Inc. | Allentown | PA | Computer and Electronic Product Manufacturing334516 | 1-19 | ◐ 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 |
| AMARC Manufacturing Co., Inc. | Feasterville | PA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| AUArconic US LLC | Lancaster | PA | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| AIArkema INC. | Bristol | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| AWArmstrong World Industries | Marietta | PA | Nonmetallic Mineral Product Manufacturing327420 | — | ◐ LIKELY ACTIVE |
| ALArxada LLC | Williamsport | PA | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| ASAshland Specialty Chemical Co.- Neville Island, Pa | Pittsburgh | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| ASA. S. K. Foods Inc. | Palmyra | PA | Food Manufacturing311612 | 100-499 | ◐ 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 |
| AAAuma Actuators, INC | Canonsburg | PA | Machinery Manufacturing333998 | — | ◐ 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 |
| BSB.C. Stone, Inc. | Everett | PA | Nonmetallic Mineral Product Manufacturing327991 | 100-499 | ◐ LIKELY ACTIVE |
Bedford Reinforced Plastics/bedford Plt | Bedford | PA | Plastics and Rubber Products Manufacturing326130 | — | ◐ LIKELY ACTIVE |
| BPBehr Proc Corp/allentown | Allentown | PA | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
Bennett Regulator Guards INC | Glen Rock | PA | Plastics and Rubber Products Manufacturing326122 | 1-19 | ◐ LIKELY ACTIVE |
| BLBestway Lumber Treatment Center | Cresco | PA | Wood Product Manufacturing321114 | — | ◐ LIKELY ACTIVE |
| BBetco-easton | Easton | PA | Paper Manufacturing322219 | 20-99 | ◐ LIKELY ACTIVE |
| BEBethlehem Energy Center | Bethlehem | PA | Food Manufacturing311314 | — | ◐ LIKELY ACTIVE |
| BSBickel's Snack Foods, Incorporated | York | PA | Food Manufacturing311919 | 100-499 | ◐ LIKELY ACTIVE |
| BMBillco Manufacturing, Inc. | Zelienople | PA | Machinery Manufacturing333249 | 20-99 | ◐ LIKELY ACTIVE |
| BEBishop Estate Vineyard and Winery | Perkasie | PA | Beverage and Tobacco Product Manufacturing312130 | 1-19 | ◐ LIKELY ACTIVE |
| BPBless Precision Tool, Inc. | Pennsburg | PA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| BEBloom Engineering Company INC | Charleroi | PA | Fabricated Metal Product Manufacturing332313 | 20-99 | ◐ LIKELY ACTIVE |
| BPBluescope Prefab Bldg Mfg Annville | Annville | PA | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| BABonsal American INC | Bristol | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| BCBova Corp | Valencia | PA | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| BFBoyertown Foundry Company | New Berlinville | PA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| BBoyesen | Lenhartsville | PA | Transportation Equipment Manufacturing336991 | 20-99 | ◐ LIKELY ACTIVE |
| BMBracalente Manufacturing CO INC | Trumbauersville | PA | Fabricated Metal Product Manufacturing332710 | 100-499 | ◐ LIKELY ACTIVE |
| BABraeburn Alloy Steel Rolling Mill Fac | Lower Burrell | PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
Braeburn INC | Plymouth Meeting | PA | Chemical Manufacturing325412 | 20-99 | ◐ LIKELY ACTIVE |
| BABraskem Amer Inc/marcus Hook | Marcus Hook | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |