| AGAustin Gray Iron Foundry | Sheboygan | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EAElkcast Aluminum | Elkhorn | WI | Primary Metal Manufacturing331524 | 1-19 | ◇ UNVERIFIED |
| IIISI, Inc. | Green bay | WI | Primary Metal Manufacturing331513 | 20-99 | ◇ UNVERIFIED |
| KCKeshar Casting LLC | Milwaukee | WI | Primary Metal Manufacturing331410 | 1-19 | ◇ UNVERIFIED |
| KFKiel Foundry CO. INC. | Kiel | WI | Primary Metal Manufacturing331511 | 1-19 | ◇ UNVERIFIED |
| MTMetalcraft Tool & Die INC. | Ixonia | WI | Primary Metal Manufacturing331210 | 1-19 | ◇ UNVERIFIED |
| M4Milwaukee - 404 S 116th St | Milwaukee | WI | Primary Metal Manufacturing331511 | 20-99 | ◇ UNVERIFIED |
| NBNeenah Brass & Aluminum Foundry CO | Neenah | WI | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| SSSouthern Stretch Forming & Fabrication | Wausau | WI | Primary Metal Manufacturing331318 | 1-19 | ◇ UNVERIFIED |
| TLThree Lakes Steel Spittlemeister Service, LLC | Three Lakes | WI | Primary Metal Manufacturing331222 | 1-19 | ◇ UNVERIFIED |
| TFTomahawk Foundary, INC | Rice Lake | WI | Primary Metal Manufacturing331511 | 20-99 | ◇ UNVERIFIED |
| WMWisconsin Metal Tech, Inc. | Richfield | WI | Primary Metal Manufacturing331210 | 20-99 | ◇ UNVERIFIED |
| ACAdvanced Centrifugals | Cambridge | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ACAdvanced Centrifugals LTD | Cambridge | WI | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| AAAdvantage Aero, INC. | Madison | WI | Primary Metal Manufacturing331313 | — | ◇ UNVERIFIED |
| AFAelco Foundries INC | Milwaukee | WI | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| ASAllied Smelting | West Allis | WI | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| AAlumitech | Merrill | WI | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| AIAmcast Industrial CORP - Amcast Automotive | Cedarburg | WI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| BIBadger Iron Works INC | Menomonie | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BFBelgium Foundry CORP | Belgium | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BBBerntsen Brass & Aluminum Foundry, INC. | Phelps | WI | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| BCBlackhawk Cutting Services, Inc. | Beloit | WI | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| BIBrandenburg Indus Svc CO at Brillion Ironworks | Brillion | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CCCapital City Culvert Corporation | Brooklyn | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CCCase Corporation - Racine Foundry Plant | Racine | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CRCimco Recycling - Dewey Pl Plant | Milwaukee | WI | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| CCCraft Cast CO INC | Jackson | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EEEgs Electrical Group | South Milwaukee | WI | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| FIFmh, INC. | Amery | WI | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| FHFoley Holdings, LLC | Wausau | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| GCGamco Components Group (former) | Cedarburg | WI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| GFGrede Foundries Inc-milwaukee Steel Division | Milwaukee | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| GWGrede Wisconsin Subsidiaries LLC | Browntown | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| HAHeritage Aluminum and Brass Foundry | St. Nazianz | WI | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| ICIps/stanwood Corporation | South Milwaukee | WI | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| KTKald Tool & Die Corporation & DNP Realy, LLC | Richfield | WI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| KAKoenig and Vits INC | Manitowoc | WI | Primary Metal Manufacturing331310 | — | ◇ UNVERIFIED |
| MCMarinette Casting CORP | Peshtigo | WI | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| MCMaysteel CORP Menomonee Falls Division | Menomonee Falls | WI | Primary Metal Manufacturing331200 | — | ◇ UNVERIFIED |
| MIMetaltek International Wis Investcast | Watertown | WI | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| NANemak Automotive Castings | Sheboygan | WI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| NUNemak USA INC. | Sheboygan | WI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| NANorthern Aluminum Foundry | North Fond Du Lac | WI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| NSNorthern Steel Castings INC | Wisconsin Rapids | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| NANorthwest Aluminum & Brass Foundries, INC. | Muskego | WI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| PIPace Industries, LLC | Grafton | WI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| PPPrism Plastics, INC. | New Richmond | WI | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| RPR2 Properties, LLC | Waukesha | WI | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| RPR2 Properties, LLC | Waukesha | WI | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
