| AArcelormittal | Cleveland | OH | — | ◇ UNVERIFIED |
| ACArcelormittal Calvert, LLC | Calvert | AL | — | ◇ UNVERIFIED |
| AMArcelor Mittal/indiana Harbor Long Carbon | East Chicago | IN | — | ◇ UNVERIFIED |
| ACArcerlormittal Cleveland LLC | Cleveland | OH | — | ◇ UNVERIFIED |
 Arnold Magnetic Technologies | Marengo | IL | — | ◇ UNVERIFIED |
| AMArtsons Manufacturing CO. | Cudahy | CA | — | ◇ UNVERIFIED |
| ACArtwire Creations, INC. | Pennsauken | NJ | — | ◇ UNVERIFIED |
| ABAti Bozeman INC | Bozeman | MT | — | ◇ UNVERIFIED |
| ASAtlantic Steel, INC | Longwood | FL | — | ◇ UNVERIFIED |
| ASAtlas Steel & Wire Gerdau Ameristeel US INC | Harahan | LA | — | ◇ UNVERIFIED |
| AMAtwood Metals LLC | Bethel | MN | — | ◇ UNVERIFIED |
| ALAutobend Laser Steel Rule Dies, INC. | Chula Vista | CA | — | ◇ UNVERIFIED |
| ABAutomotive Body Parts, INC. | Cartersville | GA | — | ◇ UNVERIFIED |
| BIBarcel/cdt INC | Irvine | CA | — | ◇ UNVERIFIED |
| BOBar-Fab of Florida, Inc | Clearwater | FL | — | ◇ UNVERIFIED |
| BSBarker Steel Construction, INC. | Tucson | AZ | — | ◇ UNVERIFIED |
| BBBarrett Buisness Services INC | Gardena | CA | — | ◇ UNVERIFIED |
| BSBayou Steel Mill Plant - Laplace Steel Mill | Laplace | LA | — | ◇ UNVERIFIED |
| BWBdm Warren Steel Operations, LLC (0278000463) | Warren | OH | — | ◇ UNVERIFIED |
| BFBeaver Falls Machine Shop | Beaver Falls | PA | — | ◇ UNVERIFIED |
| BCBekaert Corp/hanover Twp | Wilkes Barre | PA | — | ◇ UNVERIFIED |
| BCBekaert Corporation | Exeter | PA | — | ◇ UNVERIFIED |
| BCBekaert Corporation | Fairlawn | OH | — | ◇ UNVERIFIED |
| BCBekaert Corporation | Shelbyville | KY | — | ◇ UNVERIFIED |
| BIBekaert INC | Clarksdale | MS | — | ◇ UNVERIFIED |
| BFBenicia Fabrication and Machines, INC. | Benicia | CA | — | ◇ UNVERIFIED |
| BSBirmingham Steel CORP | Bourbonnais | IL | — | ◇ UNVERIFIED |
| BCBlackhawk Cutting Services, Inc. | Beloit | WI | — | ◇ UNVERIFIED |
| BIBlastech, INC. | Gary | IN | — | ◇ UNVERIFIED |
| BRBlue Ridge Metals Corporation | Fletcher | NC | — | ◇ UNVERIFIED |
| BPBlytheville Plate Works | Blytheville | AR | — | ◇ UNVERIFIED |
 Boldmark Steel Industry, LLC | Baltimore | MD | — | ◇ UNVERIFIED |
| BSBradford Steel Co., INC. | East Freetown | MA | — | ◇ UNVERIFIED |
| BEBrillouin Energy CORP. | Emeryville | CA | — | ◇ UNVERIFIED |
| BIBrothers Ironworks Co, Sarkis Tatarian | Burbank | CA | — | ◇ UNVERIFIED |
| BIBrown Industries, INC. | Dalton | GA | — | ◇ UNVERIFIED |
| BEBrunton Enterprises Inc,plas Tal Mfg CO | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| BCBury Companies, Inc. | Rogers | MN | — | ◇ UNVERIFIED |
| CACaledonian Alloys | Huntington | WV | — | ◇ UNVERIFIED |
| CSCalifornia Steel Industries INC | Fontana | CA | — | ◇ UNVERIFIED |
| CWCalvert Wire & Cable Corporation | Canton | OH | — | ◇ UNVERIFIED |
| CMCamelot Metals | Blaine | MN | — | ◇ UNVERIFIED |
| CUCamfil Usa, INC. | Crystal Lake | IL | — | ◇ UNVERIFIED |
| CSCanam Steel Corporation | Buckeye | AZ | — | ◇ UNVERIFIED |
| CECapitol Engineering & Manufacturing CO | Harvey | IL | — | ◇ UNVERIFIED |
| CMCar-anth Manufacturing INC. | Saint Louis | MO | — | ◇ UNVERIFIED |
| CPCarpenter Powder Products INC | Bridgeville | PA | — | ◇ UNVERIFIED |
 Carpenter Technology | Worcester | MA | — | ◇ UNVERIFIED |
| Carpenter Technology Dba Mb Calram LLC | Camarillo | CA | — | ◇ UNVERIFIED |
| Carpenter Technology-tube Div | Union | NJ | — | ◇ UNVERIFIED |
