| BSBarber Steel Foundry Corporation | Rothbury | MI | — | ◇ UNVERIFIED |
| BSBarnmaster Supply LLC Dba Marnmaster | Ontario | CA | — | ◇ UNVERIFIED |
| BPBarry Pattern and Foundry Company, INC. | Birmingham | AL | — | ◇ UNVERIFIED |
| BIBehr Iron & Metal | Peoria | IL | — | ◇ UNVERIFIED |
| BCBelcher (advanced Cast Products) | Easton | MA | — | ◇ UNVERIFIED |
| BFBelgium Foundry CORP | Belgium | WI | — | ◇ UNVERIFIED |
| BFBell Foundry CO | South Gate | CA | — | ◇ UNVERIFIED |
| BCBentonville Castings Company | Bentonville | AR | — | ◇ UNVERIFIED |
| BFBergstrom Foundry INC | Aberdeen | WA | — | ◇ UNVERIFIED |
| BFBerne Foundry LLC (a1453) | Pigeon | MI | — | ◇ UNVERIFIED |
| BFBig Four Foundries CORP | Tulsa | OK | — | ◇ UNVERIFIED |
| BTBingham & Taylor | Rocky Hill | CT | — | ◇ UNVERIFIED |
| BFBlackhawk Foundry & Machine CO | Davenport | IA | — | ◇ UNVERIFIED |
| BFBloomfield Foundry, INC | Bloomfield | IA | — | ◇ UNVERIFIED |
| BFBoise Foundry and Machine | Melba | ID | — | ◇ UNVERIFIED |
| BFBorough Furnace, Inc. | East Syracuse | NY | — | ◇ UNVERIFIED |
| BFBoyertown Foundry Co/fka Eafco | New Berlinville | PA | — | ◇ UNVERIFIED |
| BABradken - Amite - Foundry | Amite | LA | — | ◇ UNVERIFIED |
| BMBralco Metals Reliance Steel CORP | La Mirada | CA | — | ◇ UNVERIFIED |
| BCBranchfield Casting | Galva | IL | — | ◇ UNVERIFIED |
| BIBrandenburg Indus Svc CO at Brillion Ironworks | Brillion | WI | — | ◇ UNVERIFIED |
| BEBrighton Electric Steel Casting CO | Beaver Falls | PA | — | ◇ UNVERIFIED |
| BBrinco | Bristol | IN | — | ◇ UNVERIFIED |
| BIBristol Indiana Corporation Dba Brinco | Bristol | IN | — | ◇ UNVERIFIED |
| BMBrom Machine & Foundry CO | Winona | MN | — | ◇ UNVERIFIED |
| BCBrookman Cast | Salem | OR | — | ◇ UNVERIFIED |
| BFBrown Foundry - Dupl of Vtdec 689 | Swanton | VT | — | ◇ UNVERIFIED |
| BSBr Services | Canton | OH | — | ◇ UNVERIFIED |
| BIBryant Investments of West Texas LLC | Lubbock | TX | — | ◇ UNVERIFIED |
| BBBuckner By Storm | Fresno | CA | — | ◇ UNVERIFIED |
| BMBurgess-norton Mfg CO / Std Auto Parts CO Div | Muskegon | MI | — | ◇ UNVERIFIED |
| BGB.w. Grinding CO. | Lyons | OH | — | ◇ UNVERIFIED |
| CECalifornia Electric Steel INC | Angels Camp | CA | — | ◇ UNVERIFIED |
| CMCamco Machine INC | Fontana | CA | — | ◇ UNVERIFIED |
| CCCamden Casting Center INC | Camden | TN | — | ◇ UNVERIFIED |
| CCCamden Casting Center INC | Camden | TN | — | ◇ UNVERIFIED |
| CFCampbell Foundry Company | Harrison | NJ | — | ◇ UNVERIFIED |
| CICarmack INC Dba Phenix Foundry | Phenix City | AL | — | ◇ UNVERIFIED |
| CCCase Corporation - Racine Foundry Plant | Racine | WI | — | ◇ UNVERIFIED |
| CICastalloy INC Walterboro | Walterboro | SC | — | ◇ UNVERIFIED |
| CSCasteel Services, INC. | Kingsbury | IN | — | ◇ UNVERIFIED |
| CTCast-fab Technologies, INC. | Cincinnati | OH | — | ◇ UNVERIFIED |
| CICast Industries LLC | Albany | MN | — | ◇ UNVERIFIED |
| CICastings Investment and Alloy Foundries | Bixby | OK | — | ◇ UNVERIFIED |
| CPCastwell Products INC | Skokie | IL | — | ◇ UNVERIFIED |
| CICaterpillar INC | Hodges | SC | — | ◇ UNVERIFIED |
| CICaterpillar INC. | Mapleton | IL | — | ◇ UNVERIFIED |
| CICaterpillar INC Seals Metalcasting Facility | Toccoa | GA | — | ◇ UNVERIFIED |
| CICelestial Iron Works | Lawrence | KS | — | ◇ UNVERIFIED |
| CSCe Systems | Columbus | IN | — | ◇ UNVERIFIED |
| CFCharlette Foundry | Blackstone | MA | — | ◇ UNVERIFIED |
| CIChassix, INC. | Columbus | GA | — | ◇ UNVERIFIED |
| CCChemalloy Company Llc/ Conshohocken | Bryn Mawr | PA | — | ◇ UNVERIFIED |
| CLChrysler, LLC | Indianapolis | IN | — | ◇ UNVERIFIED |
| CRCimco Recycling - Dewey Pl Plant | Milwaukee | WI | — | ◇ UNVERIFIED |
| CACitation Aluminum, LLC | Bay Minette | AL | — | ◇ UNVERIFIED |
| CPClamp-swing Pricing CO INC | Oakland | CA | — | ◇ UNVERIFIED |
| CMClearfield Mach Co/3rd & Everett Streets | Clearfield | PA | — | ◇ UNVERIFIED |
| CRClinch River Casting INC. | Caryville | TN | — | ◇ UNVERIFIED |
| CFCmi Frank S Ryan Memorial | Des Plaines | IL | — | ◇ UNVERIFIED |
| CSColumbus Steel Castings | Columbus | OH | — | ◇ UNVERIFIED |
| CSCometal Steel INC. | Miami | FL | — | ◇ UNVERIFIED |
| CECommercial Enameling CO | Huntington Park | CA | — | ◇ UNVERIFIED |
| CMCompeer Metals, INC. | Algonquin | IL | — | ◇ UNVERIFIED |
| CECompton Enterprises | Chico | CA | — | ◇ UNVERIFIED |
| CICooper Ind/corry Plt | Corry | PA | — | ◇ UNVERIFIED |
| CMCorbitt Manufacturing Company | Paragould | AR | — | ◇ UNVERIFIED |
| CICornell Iron Works/mountaintop | Mountain Top | PA | — | ◇ UNVERIFIED |
| CCCraft Cast CO INC | Jackson | WI | — | ◇ UNVERIFIED |
| CMCraft Machine Works Incorporated - 56th Street | Hampton | VA | — | ◇ UNVERIFIED |
| CSCrane & Steel Inc.* | Addison | IL | — | ◇ UNVERIFIED |
| CVCrane Valves Fndry Sand Landfill-wa Cnty | Washington | IA | — | ◇ UNVERIFIED |
| CFCustom Fabrication & Erection | Philpot | KY | — | ◇ UNVERIFIED |
| CSCw Shumway & Sons | Batavia | IL | — | ◇ UNVERIFIED |
| DCDalton CORP Kendallville Mfg Facility | Kendallville | IN | — | ◇ UNVERIFIED |
| DFDalton Foundry | Warsaw | IN | — | ◇ UNVERIFIED |
| DSDamascus Steel Casting Company | New Brighton | PA | — | ◇ UNVERIFIED |
| DSDamascus Steel Casting Company | New Brighton | PA | — | ◇ UNVERIFIED |
| DLDana Liner Foundry and Machine Plant | Richmond | IN | — | ◇ UNVERIFIED |
| DEDefiance Energy | Defiance | OH | — | ◇ UNVERIFIED |
| DSDelray Steel Casting INC | Melvindale | MI | — | ◇ UNVERIFIED |
| DMDent Mfg CO Inc/northampton | Northampton | PA | — | ◇ UNVERIFIED |
| DSDidion & Sons Foundry CO | Saint Peters | MO | — | ◇ UNVERIFIED |
| DCDomestic Casting CO LLC | Shippensburg | PA | — | ◇ UNVERIFIED |
| DDonsco | Carnegie | PA | — | ◇ UNVERIFIED |
| DIDonsco INC Building 8 | Belleville | PA | — | ◇ UNVERIFIED |
| DMDonsco Mount Joy Renewal | Mount Joy, Borough of | PA | — | ◇ UNVERIFIED |
| DIDuro-cast, INC. | Somonauk | IL | — | ◇ UNVERIFIED |
| DCDw Clark Company Incorported | East Bridgewater | MA | — | ◇ UNVERIFIED |
| ECEac CORP | Miami Beach | FL | — | ◇ UNVERIFIED |
| EIEafco INC | Boyertown | PA | — | ◇ UNVERIFIED |
| EJEast Jordan Iron Works | Denham Springs | LA | — | ◇ UNVERIFIED |
| ECEaton Cooper Crouse-hinds, LLC | Amarillo | TX | — | ◇ UNVERIFIED |
| EIEbaa Iron Eastland Plant | Eastland | TX | — | ◇ UNVERIFIED |
| EIEbaa Iron INC | Cordele | GA | — | ◇ UNVERIFIED |
| EEEgs Electrical Group | South Milwaukee | WI | — | ◇ UNVERIFIED |
| EFEj Franklin, LLC | Franklin | KY | — | ◇ UNVERIFIED |
| ESEj Solutions | Houston | TX | — | ◇ UNVERIFIED |
| EUEj USA INC | East Jordan | MI | — | ◇ UNVERIFIED |
| EUEj USA INC | Sunfield | MI | — | ◇ UNVERIFIED |
