| CACornwall Aluminum Fndy | Lebanon | — | ◇ UNVERIFIED |
| DSDamascus Steel Casting Company | New Brighton | — | ◇ UNVERIFIED |
| DSDamascus Steel Casting Company | New Brighton | — | ◇ UNVERIFIED |
| DDonsco | Carnegie | — | ◇ UNVERIFIED |
| DMDonsco Mount Joy Renewal | Mount Joy, Borough of | — | ◇ UNVERIFIED |
| EIElectrum INC. | East Stroudsburg | — | ◇ UNVERIFIED |
| ESEmpire Steel Casting/muhlenberg Plt | Reading | — | ◇ UNVERIFIED |
| FMFederal Metals (uno- Formerly Colonial Metals) | Columbia | — | ◇ UNVERIFIED |
| FAFollansbee & Associates INC. | Blawnox | — | ◇ UNVERIFIED |
| FBFranklin Bronze & Alloy CO | Franklin | — | ◇ UNVERIFIED |
| FSFrontier Steel | Neville Island | — | ◇ UNVERIFIED |
| GSGardner Steel Corporation | New Castle | — | ◇ UNVERIFIED |
| GMGarrety Manufacturing Inc. | Kingston | — | ◇ UNVERIFIED |
| GCGeneral Cable CORP. | Williamsport | — | ◇ UNVERIFIED |
| GCGeneral Casting CO Domestic Div | Shippensburg | — | ◇ UNVERIFIED |
| GAGigliotti and Sons Iron Works | Shillington | — | ◇ UNVERIFIED |
| GAGlobal Advanced Metals | Gilbertsville | — | ◇ UNVERIFIED |
| GPGoc Property Hodings Redevelopment Pennzoil Refinery | Rouseville | — | ◇ UNVERIFIED |
| GSGood Samaritan Med Ctr/johnstown | Johnstown | — | ◇ UNVERIFIED |
| HHHandy & Harman Tube /east Norriton | Norristown | — | ◇ UNVERIFIED |
| HSHoover Steel, INC. | Schwenksville | — | ◇ UNVERIFIED |
| IMIndustrial Metals & Mineral Company | Saxonburg | — | ◇ UNVERIFIED |
| IKIpsco Koppel Tubulars Llc/koppel Plt | Koppel | — | ◇ UNVERIFIED |
| JGJ&E Grill Mfg., LLC | New Holland | — | ◇ UNVERIFIED |
| JSJmc Steel Group | Wheatland | — | ◇ UNVERIFIED |
| JSJmc Steel Group | Sharon | — | ◇ UNVERIFIED |
| JFJohnstown Foundry Castings, INC. | Johnstown | — | ◇ UNVERIFIED |
| KWKalas Wire | Lancaster | — | ◇ UNVERIFIED |
| KSKane Steel INC. | Pottsville | — | ◇ UNVERIFIED |
| KIK-castings INC | Latrobe | — | ◇ UNVERIFIED |
| KCKeywell CORP - Vac Air Alloys Div | Midland | — | ◇ UNVERIFIED |
| KIKief Industries, INC. Dba Excelsior Brass Works | Blandon | — | ◇ UNVERIFIED |
| KMKloeckner Metals Corporation | Bensalem | — | ◇ UNVERIFIED |
| KFKraton Fabricating | Canonsburg | — | ◇ UNVERIFIED |
| KEKtba Enterprises INC. | Upper Paxton, Township of | — | ◇ UNVERIFIED |
| KFKulp Foundry INC | Wind Gap | — | ◇ UNVERIFIED |
| KFKulp Foundry Incorporated | East Stroudsburg | — | ◇ UNVERIFIED |
| LMLancaster Malleable /manheim-keller | Lancaster | — | ◇ UNVERIFIED |
| LSLane Steel Co., INC. | Mc Kees Rocks | — | ◇ UNVERIFIED |
| LMLefton Metal Enterprises Corporation | Wellsville | — | ◇ UNVERIFIED |
| LTLenape Tooling INC | Perkasie | — | ◇ UNVERIFIED |
| LILeveltek International L.L.C. | Burgettstown | — | ◇ UNVERIFIED |
| LFLunar Fusion, INC. | Beaver Falls | — | ◇ UNVERIFIED |
| MIMaclyn Incorporated | New Berlin | — | ◇ UNVERIFIED |
| MEMagnesium Elektron Company | Tamaqua | — | ◇ UNVERIFIED |
| MPMetal Powder Prod/st Marys | Saint Marys | — | ◇ UNVERIFIED |
| MAMj Associates Steel Co., INC. | Philadelphia | — | ◇ UNVERIFIED |
| MSMlp Steel, LLC | Everson | — | ◇ UNVERIFIED |
 M&m Industries, INC. | Chester | — | ◇ UNVERIFIED |
| MMM & M Sheet Metal & Steel Fabricators | Williamsport | — | ◇ UNVERIFIED |
