| ICInvest Cast Inc - Wisconsin | Osceola | WI | Primary Metal Manufacturing331512 | 20-99 | ◐ LIKELY ACTIVE |
| MMMercury Marine Fond du Lac | Fond Du Lac | WI | Primary Metal Manufacturing331512 | 500+ | ◐ LIKELY ACTIVE |
| MFMid-City Foundry Co. - Milwaukee Division | Milwaukee | WI | Primary Metal Manufacturing331510 | 20-99 | ◐ LIKELY ACTIVE |
| MFMilwaukee Forgetech INC. | Milwaukee | WI | Primary Metal Manufacturing331111 | — | ◐ LIKELY ACTIVE |
| NCNucor Cold Finish Wisconsin | Oak Creek | WI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| PIPRE-heat, Inc. | Oostburg | WI | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| SRSpecialty Rolled Metals LLC Beaver Dam WI | Beaver Dam | WI | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| WFWaukesha Foundry INC | Waukesha | WI | Primary Metal Manufacturing331510 | — | ◐ LIKELY ACTIVE |
 Wisconsin Oven CORP | East Troy | WI | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| ACArntzen Corporation | Sharon | WI | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| BMB&b Metals Processing CO INC | Newton | WI | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| 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 |
| PCPortage Casting & Mold INC | Portage | WI | Primary Metal Manufacturing331520 | — | ◇ UNVERIFIED |
| RSRacine Steel Castings Div | Racine | WI | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| RAReal Alloy Recycling INC - Racine Plant | Mount Pleasant | WI | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| RSRiver Steel INC | La Crosse | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| RMRoloff Mfg CORP | Kaukauna | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| SIScot Industries | Muscoda | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SPShiloh - Pleasant Prairie | Kenosha | WI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| SMSparta Mfg CO INC | Sparta | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| SPStainless Piping Specialists | Omro | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
