| ZOZelienople Operations | Zelienople | PA | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| TMTmp Metals Group, LTD. | Pittsburgh | PA | Primary Metal Manufacturing331410 | — | ◐ LIKELY ACTIVE |
| 7S72 Steel LLC | Aliquippa | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AMAbington Metals Refining & Mfg INC | Philadelphia | PA | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| AAditech | Leetsdale | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| ACAdvanced Cast Products/meadville | Meadville | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| AIAffival, INC. | Verona | PA | Primary Metal Manufacturing331112 | — | ◇ UNVERIFIED |
| AHAg Hog Pittsburgh Company, INC. | Darlington | PA | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| ACAlaska Company INC | Bloomsburg | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| ACAlaska Company INC | Stroudsburg | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AMAlco Metals | Bloomfield, Township of | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| ACAllegheny Cast Metals, INC. | Titusville | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| AFAllegheny Foundry | Pittsburgh | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| AFAllegheny Foundry Co/bolivar | Bolivar | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum CORP | Coatesville | PA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum Llc/bagdad | Leechburg | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| ASAllegheny Steel Products CO. | Pittsburgh | PA | Primary Metal Manufacturing331419 | — | ◇ UNVERIFIED |
| ASAll Steel Supply, INC. | Horsham | PA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| ACAmerican Copper Products | Pottsville | PA | Primary Metal Manufacturing331422 | — | ◇ UNVERIFIED |
| AZAmerican Zinc Recycling LLC | Pittsburgh | PA | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| AMAmer Metal Recycling LLC | Ellwood City | PA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| ATAmg Titanium 315 Green Ridge Rd Fac | New Castle | PA | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| AIAmpal Inc/palmerton | Palmerton | PA | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| APArcelormittal Plate LLC | Coatesville | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| AMArcelor Mittal Steel | Conshohocken | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| ALArc Limited | Leetsdale | PA | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| ACArrow Castings Company | Erie | PA | Primary Metal Manufacturing331313 | — | ◇ UNVERIFIED |
| ARA.r.t. Research Enterprises, INC. | Lancaster | PA | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| AAAti Allegheny Ludlum | Latrobe | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| BMBardane Manufacturing | Jermyn | PA | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| BSB.g.b. Steel Fabricators, INC | Fairless Hills | PA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| BMBolton Metal Prod Co/plt 1 & 4 | Bellefonte | PA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| BFBridesburg Fndy CO | Whitehall | PA | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| BWBrush Wellman INC | Shoemakersville | PA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| CICambridge-lee Industries, Incorporated | Reading | PA | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| CRCast Rite Metal Company, INC. | Birdsboro | PA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| CICdp Industries | Latrobe | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| CSCol-fin Specialty Steel Ii LLC | New Brighton | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| CMConcast Metal Prods CO | Mars | PA | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| CSConsidine Studios, Incorporated | Lansdale | PA | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| CACornwall Aluminum Fndy | Lebanon | PA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| DSDamascus Steel Casting Company | New Brighton | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| DSDamascus Steel Casting Company | New Brighton | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| DDonsco | Carnegie | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| DMDonsco Mount Joy Renewal | Mount Joy, Borough of | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EIElectrum INC. | East Stroudsburg | PA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| ESEmpire Steel Casting/muhlenberg Plt | Reading | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| FMFederal Metals (uno- Formerly Colonial Metals) | Columbia | PA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| FAFollansbee & Associates INC. | Blawnox | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| FBFranklin Bronze & Alloy CO | Franklin | PA | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
