| MMMoore & Morford INC | Greensburg, PA | Fabricated Metal Product Manufacturing332312 | 20–99 | ◐ LIKELY ACTIVE |
| OUOpta USA Inc/opta Myoma Plt | Mars, PA | Nonmetallic Mineral Product Manufacturing327992 | 1–19 | ◐ LIKELY ACTIVE |
| PIPbm INC | Irwin, PA | Fabricated Metal Product Manufacturing332912 | 100–499 | ◐ LIKELY ACTIVE |
| PMPrion Manufacturing | Oakdale, PA | Fabricated Metal Product Manufacturing332710 | 20–99 | ◐ LIKELY ACTIVE |
| SLSintermet LLC | Kittanning, PA | Fabricated Metal Product Manufacturing332117 | 20–99 | ◐ LIKELY ACTIVE |
| XX-mark/belden | Washington, PA | Fabricated Metal Product Manufacturing332313 | 20–99 | ◐ LIKELY ACTIVE |
| ICInnovative Carbide/irwin | Irwin, PA | Machinery Manufacturing333511 | — | ◇ UNVERIFIED |
| AGAcf Group LLC | Allison, PA | Fabricated Metal Product Manufacturing332999 | 20–99 | ◐ LIKELY ACTIVE |
| ACAlcoa Commercial Windows LLC (dba Traco) | Cranberry Township, PA | Primary Metal Manufacturing331318 | — | ◐ LIKELY ACTIVE |
| ALAllegheny Ludlum Latrobe Plant | Latrobe, PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| ALAllegheny Ludlum LLC | Brackenridge, PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| ASAmetek Specialty Metal Prod Div | Eighty Four, PA | Fabricated Metal Product Manufacturing332114 | — | ◐ LIKELY ACTIVE |
| ATApplied Test Systems, LLC | Butler, PA | Computer and Electronic Product Manufacturing334516 | 20–99 | ▲ REPORTED CLOSED |
| AMArcelormittal Monessen Coke Plant | Monessen, PA | Petroleum and Coal Products Manufacturing324199 | — | ◐ LIKELY ACTIVE |
| ACArmstrong Cement & Supply - Winfield | Cabot, PA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| ASAshland Specialty Chemical Co.- Neville Island, Pa | Pittsburgh, PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| BCBasf CORP | Monaca, PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| BEBasf Evans City Ops | Evans City, PA | Chemical Manufacturing325130 | — | ◐ LIKELY ACTIVE |
| BMBear Metallurgical Mfg | Butler, PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| BMBerkley Medical Resources, INC. | Smithfield, PA | Textile Mills313312 | — | ◐ LIKELY ACTIVE |
| BSBvpv Styrenics LLC - Beaver Cnty | Monaca, PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
Calgon Carbon CORP - Neville Island Plt | Pittsburgh, PA | Chemical Manufacturing325110 | — | ◐ LIKELY ACTIVE |
| CBCannon Boiler Works | New Kensington, PA | Fabricated Metal Product Manufacturing332410 | 20–99 | ◐ LIKELY ACTIVE |
| CICleaveland/price INC | Trafford, PA | Electrical Equipment, Appliance & Component Manufacturing335313 | 100–499 | ◐ LIKELY ACTIVE |
| CCCleveland Cliffs Steel Corp/ Butler Works | Butler, PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
Cnc Specialties Manufacturing INC | Apollo, PA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| CICue Inc/cranberry Twp Plt | Cranberry Twp, PA | Plastics and Rubber Products Manufacturing326199 | — | ◐ LIKELY ACTIVE |
Eastman Chemical Company | West Elizabeth, PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| EPEv Products INC Dba Kromek | Zelienople, PA | Computer and Electronic Product Manufacturing334519 | 20–99 | ◐ LIKELY ACTIVE |
| FBFirestone Bldg Prod CO Youngwood Plt | Youngwood, PA | Plastics and Rubber Products Manufacturing326150 | — | ◐ LIKELY ACTIVE |
| FAFlexsys Amer LTD Par/monongahela | Monongahela, PA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| FDFlowline Div Ezeflow Usa/new Castle | New Castle, PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
Giffin Interior & Fixture, INC | Bridgeville, PA | Wood Product Manufacturing321911 | — | ◐ LIKELY ACTIVE |
| HCHarmony Castings | Harmony, PA | Primary Metal Manufacturing331524 | 20–99 | ◐ LIKELY ACTIVE |
| HPHeeter Printing CO | Canonsburg, PA | Printing and Related Support Activities323111 | 100–499 | ◐ LIKELY ACTIVE |
| HCHenwil CORP | Newell, PA | Chemical Manufacturing325311 | 20–99 | ◐ LIKELY ACTIVE |
| HPHunter Panels | Smithfield, PA | Plastics and Rubber Products Manufacturing326140 | — | ◐ LIKELY ACTIVE |
| IIIi-vi Incorporated | Saxonburg, PA | Machinery Manufacturing333310 | — | ◐ LIKELY ACTIVE |
| IKIpsco Koppel Tubular CORP Ambridge | Ambridge, PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| IKIpsco Koppel Tubulars CORP | Koppel, PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◐ LIKELY ACTIVE |
| JSJessop Steel LLC | Washington, PA | Chemical Manufacturing325220 | — | ◐ LIKELY ACTIVE |
| JAJewel Acquisition - Midland Facility | Midland, PA | Chemical Manufacturing325310 | — | ◐ LIKELY ACTIVE |
| JMJohnson Matthey INC | Smithfield, PA | Transportation Equipment Manufacturing336390 | — | ◐ LIKELY ACTIVE |
| KPKenson Plastics | Beaver Falls, PA | Plastics and Rubber Products Manufacturing326199 | 100–499 | ◐ LIKELY ACTIVE |
| LTLeading Technologies INC | Leechburg, PA | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| LSLehigh Specialty Melting INC | Latrobe, PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| MSMain Steel Inc/harmony | Harmony, PA | Fabricated Metal Product Manufacturing332117 | — | ◐ LIKELY ACTIVE |
Metal Powder Works, LLC | Clinton, PA | Fabricated Metal Product Manufacturing332117 | — | ◐ LIKELY ACTIVE |
| MMetaltech/pgh | Pittsburgh, PA | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| MCMulti Chem Group LLC Washington Facility | Washington, PA | Machinery Manufacturing333318 | — | ◐ LIKELY ACTIVE |