| SCStroh Controls | Mauston | WI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| SPStroh Precision Die Casting, LLC | Mauston | WI | Primary Metal Manufacturing331313 | — | ◇ UNVERIFIED |
| SPStroh Precision Die Casting, LLC | Mauston | WI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| TPTecumseh Products CO -sheboygan Falls Operat | Sheboygan Falls | WI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| TFTomahawk Foundary, INC | Rice Lake | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TPTurning Point Custom Machine LLC | De Pere | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| VPValley Plating and Fabricating | Green Bay | WI | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| WVWakefield- Vette, INC. | Withee | WI | Primary Metal Manufacturing331310 | — | ◇ UNVERIFIED |
| WAWaterford Aluminum Company, INC. | Waterford | WI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| WEWatton Enterprises | Chippewa Falls | WI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| WAWaunakee Alloy Casting Corporation | Waunakee | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
 Waupaca Foundry Landfill | Waupaca | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WAWestwood Aluminum Casting INC | Waukesha | WI | Primary Metal Manufacturing331520 | — | ◇ UNVERIFIED |
| WGWgs Global Services | Marinette | WI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| WMWisconsin Metal Tech, Inc. | Richfield | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| WMWisconsin Metal Tech, Inc. | Richfield | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| WPWisconsin Precision Casting Corporation | Lake Geneva | WI | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| WCWoodland/alloy Casting, INC. | Racine | WI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| YMYakfab Metals Inc | Oconto | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
