| PCPhoenix Coaters LLC | Berlin | — | ◇ UNVERIFIED |
 Pinnacle Precision INC | Racine | — | ◇ UNVERIFIED |
| PFPjk Finishing CO INC | Menomonee Falls | — | ◇ UNVERIFIED |
| PEPlating Engineering | Milwaukee | — | ◇ UNVERIFIED |
| PWPolar Ware CO | Sheboygan | — | ◇ UNVERIFIED |
| PSPrecision Screw Products., INC. of Janesville | Janesville | 1–19 | ◇ UNVERIFIED |
| PSPressed Steel Tank CO INC | Milwaukee | — | ◇ UNVERIFIED |
| RPReliable Plating Works-5th St | Milwaukee | — | ◇ UNVERIFIED |
 Rie Coatings LLC | Oshkosh | — | ◇ UNVERIFIED |
| RCRytec CORP | Jackson | — | ◇ UNVERIFIED |
| SIShanti Ind INC | Monticello | — | ◇ UNVERIFIED |
| SCSilgan Containers Manufacturing CORP | Kenosha | — | ◇ UNVERIFIED |
| SCSilgan Containers Manufacturing Corporat | Waupun | — | ◇ UNVERIFIED |
| SCSilgan Containers Mfg CORP | Oconomowoc | — | ◇ UNVERIFIED |
| SKS K Williams CO | Milwaukee | — | ◇ UNVERIFIED |
 Sonoco Products CO | Wausau | — | ◇ UNVERIFIED |
| SLSpx Lindberg a Division of Spx Corporation | Watertown | — | ◇ UNVERIFIED |
| STSsi Technologies INC (former) | Janesville | — | ◇ UNVERIFIED |
| SISuperior Industrial Coating INC | Racine | — | ◇ UNVERIFIED |
| SSSuper Steel Products CORP | Milwaukee | — | ◇ UNVERIFIED |
| SZSussex Zinc Plating INC | Sussex | — | ◇ UNVERIFIED |
| SISymet INC | Milwaukee | — | ◇ UNVERIFIED |
| TCTankcraft CORP | Walworth | — | ◇ UNVERIFIED |
| TITecomet INC | Kenosha | — | ◇ UNVERIFIED |
| TGTed Grob Corporation | Grafton | — | ◇ UNVERIFIED |
| TGTextron Gse - Premier | Marinette | — | ◇ UNVERIFIED |
| TMTramont Manufacturing LLC | Milwaukee | — | ◇ UNVERIFIED |
| TMTramont Manufacturing LLC | Milwaukee | — | ◇ UNVERIFIED |
| TCTri Clover INC | Kenosha | — | ◇ UNVERIFIED |
| TITrudell Industrial Finishing | Depere | — | ◇ UNVERIFIED |
| TGTweet Garot Mechanical, INC. | Tomahawk | — | ◇ UNVERIFIED |
| UMUmi Metalfab | Menomonee Falls | — | ◇ UNVERIFIED |
| UTUtility Tool and Trailer | Clintonville | — | ◇ UNVERIFIED |
 Western Industries INC | Watertown | — | ◇ UNVERIFIED |
| WFWisconsin Finishes | Verona | — | ◇ UNVERIFIED |
| WPWoller Precision Machine LLC | Coleman | — | ◇ UNVERIFIED |
| WCWorthington Cylinders-gerett Products | Menomonee Falls | — | ◇ UNVERIFIED |
| 3T305 Travis Lane - Therm-tech of Waukesha, INC. | Waukesha | 20–99 | ◐ LIKELY ACTIVE |
| 4E4Front Engineered Solutions - Kenosha | Kenosha | 100–499 | ◐ LIKELY ACTIVE |
| 4E4Front Engineered Solutions- Muskego | Muskego | 100–499 | ◐ LIKELY ACTIVE |
| 66086_14492 | Green Bay | 20–99 | ◐ LIKELY ACTIVE |
| 77764_18604 | Milwaukee | 20–99 | ◐ LIKELY ACTIVE |
| ASAalberts Surface Technologies- Milwaukee | Milwaukee | 1–19 | ◐ LIKELY ACTIVE |
| AOACI - Oshkosh | Oshkosh | 20–99 | ◐ LIKELY ACTIVE |
| AMAJ Manufacturing, Inc. 105 Riggs Street | Bloomer | 100–499 | ◐ LIKELY ACTIVE |
| AMAJ Manufacturing, Inc. 1217 Oak Street | Bloomer | 20–99 | ◐ LIKELY ACTIVE |
| AMAJ Manufacturing, Inc. 521 Main Street | Bloomer | 20–99 | ◐ LIKELY ACTIVE |
| AWAlloy Welding Inc | Caledonia | 20–99 | ◐ LIKELY ACTIVE |
| ABAmerican Bin and Conveyor LLC | Burlington | 20–99 | ◐ LIKELY ACTIVE |
| ATArrow Tool & Stamping Company, Inc | Milwaukee | 20–99 | ◐ LIKELY ACTIVE |
