| 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 |
| FSFrontier Steel | Neville Island | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| GMGarrety Manufacturing Inc. | Kingston | PA | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| GCGeneral Cable CORP. | Williamsport | PA | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| GCGeneral Casting CO Domestic Div | Shippensburg | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| GAGigliotti and Sons Iron Works | Shillington | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| GAGlobal Advanced Metals | Gilbertsville | PA | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| GPGoc Property Hodings Redevelopment Pennzoil Refinery | Rouseville | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| GMGreenville Metals INC | Transfer | PA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| GIGreiner Industries | Mount Joy, Township of | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| HHHandy & Harman Tube /east Norriton | Norristown | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| HSHoover Steel, INC. | Schwenksville | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| IMIndustrial Metals & Mineral Company | Saxonburg | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| IKIpsco Koppel Tubulars Llc/koppel Plt | Koppel | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| JGJ&E Grill Mfg., LLC | New Holland | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| JSJmc Steel Group | Wheatland | PA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| KWKalas Wire | Lancaster | PA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| KSKane Steel INC. | Pottsville | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| KCKeywell CORP - Vac Air Alloys Div | Midland | PA | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| KIKief Industries, INC. Dba Excelsior Brass Works | Blandon | PA | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| KMKloeckner Metals Corporation | Bensalem | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KFKraton Fabricating | Canonsburg | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| KEKtba Enterprises INC. | Upper Paxton, Township of | PA | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| KFKulp Foundry Incorporated | East Stroudsburg | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| LMLancaster Malleable /manheim-keller | Lancaster | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| LMLefton Metal Enterprises Corporation | Wellsville | PA | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| LILeveltek International L.L.C. | Burgettstown | PA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| LFLunar Fusion, INC. | Beaver Falls | PA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| MIMaclyn Incorporated | New Berlin | PA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| MEMagnesium Elektron Company | Tamaqua | PA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
 M&m Industries, INC. | Chester | PA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| MMM & M Sheet Metal & Steel Fabricators | Williamsport | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| NJNew Jersey Boom & Erectors | Henryville | PA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| OCOld Castle Building Envelope | Bloomsburg | PA | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| PMPatriot Metal Products INC. | Berwick | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| PFPittsburgh Flatroll Company | Pittsburgh | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| PMPocono Metal INC. | Bangor | PA | Primary Metal Manufacturing331319 | — | ◇ UNVERIFIED |
| PMPsc Metals, INC. | Koppel | PA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| RIRansom Ind Lp/macungie | Macungie | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RMRitchey Metals/scenery Hill | Scenery Hill | PA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| RFRoll Former Corporation | Chalfont | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| RQRoyer Quality Castings, Incorporated | Boyertown | PA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
