| WNWVA - New York | Oil City | 1–19 | ◐ LIKELY ACTIVE |
| ZOZelienople Operations | Zelienople | 20–99 | ◐ LIKELY ACTIVE |
| TMTmp Metals Group, LTD. | Pittsburgh | — | ◐ LIKELY ACTIVE |
| 7S72 Steel LLC | Aliquippa | — | ◇ UNVERIFIED |
| AMAbington Metals Refining & Mfg INC | Philadelphia | — | ◇ UNVERIFIED |
| AAditech | Leetsdale | — | ◇ UNVERIFIED |
| ACAdvanced Cast Products/meadville | Meadville | — | ◇ UNVERIFIED |
| AIAffival, INC. | Verona | — | ◇ UNVERIFIED |
| AHAg Hog Pittsburgh Company, INC. | Darlington | — | ◇ UNVERIFIED |
| ACAlaska Company INC | Bloomsburg | — | ◇ UNVERIFIED |
| ACAlaska Company INC | Stroudsburg | — | ◇ UNVERIFIED |
| AMAlco Metals | Bloomfield, Township of | — | ◇ UNVERIFIED |
| ACAllegheny Cast Metals, INC. | Titusville | — | ◇ UNVERIFIED |
| AFAllegheny Foundry | Pittsburgh | — | ◇ UNVERIFIED |
| AFAllegheny Foundry Co/bolivar | Bolivar | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum CORP | Coatesville | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum Llc/bagdad | Leechburg | — | ◇ UNVERIFIED |
| ASAllegheny Steel Products CO. | Pittsburgh | — | ◇ UNVERIFIED |
| ATAlliance Tubular Holding LLC | Darlington | — | ◇ UNVERIFIED |
| ASAll Steel Supply, INC. | Horsham | — | ◇ UNVERIFIED |
| ACAmerican Copper Products | Pottsville | — | ◇ UNVERIFIED |
| AZAmerican Zinc Recycling LLC | Pittsburgh | — | ◇ UNVERIFIED |
| AMAmer Metal Recycling LLC | Ellwood City | — | ◇ UNVERIFIED |
| ATAmg Titanium 315 Green Ridge Rd Fac | New Castle | — | ◇ UNVERIFIED |
| ATAmg Titanium LLC | New Castle | — | ◇ UNVERIFIED |
| AIAmpal Inc/palmerton | Palmerton | — | ◇ UNVERIFIED |
| AArcelormittal | Coatesville | — | ◇ UNVERIFIED |
| APArcelormittal Plate LLC | Coatesville | — | ◇ UNVERIFIED |
| AMArcelor Mittal Steel | Conshohocken | — | ◇ UNVERIFIED |
| ALArc Limited | Leetsdale | — | ◇ UNVERIFIED |
| ACArrow Castings Company | Erie | — | ◇ UNVERIFIED |
| ARA.r.t. Research Enterprises, INC. | Lancaster | — | ◇ UNVERIFIED |
| AAAti Allegheny Ludlum | Latrobe | — | ◇ UNVERIFIED |
| AAAti Allegheny Ludlum | Washington | — | ◇ UNVERIFIED |
| BMBardane Manufacturing | Jermyn | — | ◇ UNVERIFIED |
| BSBayou Steel Group, LLC | Leetsdale | — | ◇ UNVERIFIED |
| BCBekaert Corporation | Exeter | — | ◇ UNVERIFIED |
| BSB.g.b. Steel Fabricators, INC | Fairless Hills | — | ◇ UNVERIFIED |
| BMBolton Metal Prod Co/plt 1 & 4 | Bellefonte | — | ◇ UNVERIFIED |
| BFBridesburg Fndy CO | Whitehall | — | ◇ UNVERIFIED |
| BWBrush Wellman INC | Shoemakersville | — | ◇ UNVERIFIED |
| CICambridge-lee Industries, Incorporated | Reading | — | ◇ UNVERIFIED |
| CDCameron Diversified Prods | Wilcox | — | ◇ UNVERIFIED |
| CRCast Rite Metal Company, INC. | Birdsboro | — | ◇ UNVERIFIED |
| CICdp Industries | Latrobe | — | ◇ UNVERIFIED |
| CTCleveland Track Material, Incorporated | Reading | — | ◇ UNVERIFIED |
| CSCol-fin Specialty Steel Ii LLC | New Brighton | — | ◇ UNVERIFIED |
| CMConcast Metal Prods CO | Mars | — | ◇ UNVERIFIED |
| CSConsidine Studios, Incorporated | Lansdale | — | ◇ UNVERIFIED |
| CICornell Iron Works/mountaintop | Mountain Top | — | ◇ UNVERIFIED |
