| 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 |
| AIAlmco INC | Albert Lea | MN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
 American Cast Iron Pipe CO. | Houston | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| AMA. Moresi Foundry, INC. | Jeanerette | LA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| AFAnstey Foundry | Stevensville | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ACApex Consulting | Thornton | CO | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ACAti Casting Services INC. | La Porte | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BABabcock and Wilcox - Foundry Operations (1677020054) | Barberton | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BIBadger Iron Works INC | Menomonie | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BEBagby Enterprises INC. | Branson | MO | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BHBag House Industrial Sheet Metal | Corona | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BFBelgium Foundry CORP | Belgium | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BFBerne Foundry LLC (a1453) | Pigeon | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BFBorough Furnace, Inc. | East Syracuse | NY | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BIBrandenburg Indus Svc CO at Brillion Ironworks | Brillion | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BFBrown Foundry - Dupl of Vtdec 689 | Swanton | VT | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BIBryant Investments of West Texas LLC | Lubbock | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BBBuckner By Storm | Fresno | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BGB.w. Grinding CO. | Lyons | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CCCamden Casting Center INC | Camden | TN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CCCase Corporation - Racine Foundry Plant | Racine | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CICast Industries LLC | Albany | MN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CICaterpillar INC. | Mapleton | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CICelestial Iron Works | Lawrence | KS | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CSCe Systems | Columbus | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CFCmi Frank S Ryan Memorial | Des Plaines | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CMColbrit Manufacturing | Chatsworth | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CECommercial Enameling CO | Huntington Park | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CECompton Enterprises | Chico | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CICornell Iron Works/mountaintop | Mountaintop | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CCCraft Cast CO INC | Jackson | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CSCrane & Steel Inc.* | Addison | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CSCw Shumway & Sons | Batavia | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| DFDalton Foundry | Warsaw | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| DDonsco | Carnegie | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| DMDonsco Mount Joy Renewal | Mount Joy, Borough of | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ECEaton Cooper Crouse-hinds, LLC | Amarillo | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EIEbaa Iron Eastland Plant | Eastland | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EAEj Ardmore INC | Ardmore | OK | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EFEj Franklin, LLC | Franklin | KY | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EFEjiw-ardmore Foundry INC | Ardmore | OK | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ESEj Solutions | Houston | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EUEj USA INC | East Jordan | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EUEj USA INC | Sunfield | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EUEj USA INC | Oak Park | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EIErp Iron Ore | Reynolds | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EFEtheridge Foundry and Machine CO | Portland | ME | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| FCFalcon Castings, INC. | Baxley | GA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
