| AIAllcast Incorporated | Allenton | WI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| AMAllied Machinery - Richland LLC | Richland Center | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| AIAzco INC | Neenah | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BMBremer Manufacturing | Elkhart Lake | WI | Primary Metal Manufacturing331310 | — | ◇ UNVERIFIED |
| CFChicago Faucets-milwaukee Plant | Milwaukee | WI | Primary Metal Manufacturing331520 | — | ◇ UNVERIFIED |
| GDGardner Denver Thomas Products | Sheboygan | WI | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| JLJ L French CORP - Taylor Dr Facility | Sheboygan | WI | Primary Metal Manufacturing331310 | — | ◇ UNVERIFIED |
| KSKenosha Steel Castings | Kenosha | WI | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| LJLock Joint Tube Wisconsin | De Pere | WI | Primary Metal Manufacturing331200 | — | ◇ UNVERIFIED |
 Luvata Appleton LLC | Appleton | WI | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| MCMelron CORP | Weston | WI | Primary Metal Manufacturing331520 | — | ◇ UNVERIFIED |
| NPNorthern Precision Casting CO | Lake Geneva | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| PMPrecision Metalsmiths INC. | Markesan | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| QCQuality Castings CO | Waukesha | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SSStrattec Security CORP | Glendale | WI | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| VIValmet INC | Waukesha | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WIWire Industries INC | Fond Du Lac | WI | Primary Metal Manufacturing331100 | — | ◇ UNVERIFIED |
| WPWisconsin Precision Casting CORP | East Troy | WI | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| MSMid States Aluminum CORP | Fond Du Lac | WI | Primary Metal Manufacturing331313 | — | ◇ UNVERIFIED |
| OMOrchid Monroe LLC | Monroe | WI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| AFAfk Foundry | Ripon | WI | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| AWAlcoa Wheel Products | Beloit | WI | Primary Metal Manufacturing331520 | — | ◇ UNVERIFIED |
| AMAmpco Metal Manufacturing INC | Milwaukee | WI | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
 Apache Stainless Equipment CORP | Plover | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BMBassett Mechanical INC | Kaukauna | WI | Primary Metal Manufacturing331200 | — | ◇ UNVERIFIED |
| BFBerntsen Foundry | Phelps | WI | Primary Metal Manufacturing331520 | — | ◇ UNVERIFIED |
| BIBrillion Iron Works, INC. | Brillion | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| CEChart Energy & Chemical INC | La Crosse | WI | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| CWCharter Wire Division CO | Milwaukee | WI | Primary Metal Manufacturing331220 | — | ◇ UNVERIFIED |
| CBChippewa Brass & Aluminum Foundry LTD | Chippewa Falls | WI | Primary Metal Manufacturing331520 | — | ◇ UNVERIFIED |
| CIChrist Iron Works, INC. | Kenosha | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CACnh America LLC | Racine | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| CICrucible INC Trent Tube Div Plt 1 | East Troy | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| DMDiversified Machine Milwaukee LLC | Milwaukee | WI | Primary Metal Manufacturing331520 | — | ◇ UNVERIFIED |
| GRGleason Roll Off & Recycling INC | Racine | WI | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| GBGrede - Berlin | Berlin | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| HIHufcor, INC. | Janesville | WI | Primary Metal Manufacturing331200 | — | ◇ UNVERIFIED |
| ICIntermet CORP - Racine Plt (former) | Sturtevant | WI | Primary Metal Manufacturing331520 | — | ◇ UNVERIFIED |
| KAKoenig and Vitts Mirro Plnt 5 | Manitowoc | WI | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| KIKramer International | Milwaukee | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| Luvata Appleton LLC - Sunwire Facility | Kimberly | WI | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| MTMetal Technologies, Inc.-west Allis Duct | Milwaukee | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| MMMidwest Mfg Prehung Plant | Eau Claire | WI | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| MGMilwaukee Gray Iron, LLC | West Allis | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| MCMotor Castings CO | Milwaukee | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| NFNeenah Foundry CO - Plants 2 and 3 (w2179) | Neenah | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| NCNucor Cold Finish Wisconsin INC | Oak Creek | WI | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| PIPace Industries Est Division | Grafton | WI | Primary Metal Manufacturing331520 | — | ◇ UNVERIFIED |
| PIPace Industries - Mole Creek | Grafton | WI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| POPhillips-medisize - Origen | Menomonie | WI | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
