| MCMilwaukee County Transit System-flt Maint | Milwaukee | — | ◇ UNVERIFIED |
 Milwaukee Valve CO INC | Milwaukee | — | ◇ UNVERIFIED |
| PHP & H Mining Equipment | Milwaukee | — | ◇ UNVERIFIED |
| PEPlating Engineering | Milwaukee | — | ◇ UNVERIFIED |
| PSPressed Steel Tank CO INC | Milwaukee | — | ◇ UNVERIFIED |
| RPReliable Plating Works-5th St | Milwaukee | — | ◇ UNVERIFIED |
| SLSic Lazaro US INC | Milwaukee | — | ◇ UNVERIFIED |
| SKS K Williams CO | Milwaukee | — | ◇ UNVERIFIED |
| SSSuper Steel LLC | Milwaukee | — | ◇ UNVERIFIED |
| SSSuper Steel Products CORP | Milwaukee | — | ◇ UNVERIFIED |
| SCSupreme Cores, Incorporated | Milwaukee | — | ◇ UNVERIFIED |
| SISymet INC | Milwaukee | — | ◇ UNVERIFIED |
| TMTramont Manufacturing LLC | Milwaukee | — | ◇ UNVERIFIED |
| TMTramont Manufacturing LLC | Milwaukee | — | ◇ UNVERIFIED |
| 3U3 Up Metal Works LLC | Milwaukee | — | ◐ LIKELY ACTIVE |
| ASAalberts Surface Technologies- Milwaukee | Milwaukee | 1–19 | ◐ LIKELY ACTIVE |
| ATArrow Tool & Stamping Company, Inc | Milwaukee | 20–99 | ◐ LIKELY ACTIVE |
| ADASI Doors, Inc. | Milwaukee | 20–99 | ◐ LIKELY ACTIVE |
| AGAZZ Galvanizing and Plating - Milwaukee LLC | Milwaukee | 20–99 | ◐ LIKELY ACTIVE |
| CSCapital Stampings Corp | Milwaukee | 20–99 | ◐ LIKELY ACTIVE |
| CECutting Edge Fabrication, Inc | Milwaukee | 20–99 | ◐ LIKELY ACTIVE |
| GPGlobal Power Components-Chase/Oklahoma | Milwaukee | 100–499 | ◐ LIKELY ACTIVE |
| ICIntelligent Composites LLC | Milwaukee | — | ◐ LIKELY ACTIVE |
| KMKoziol Manufacturing LLC | Milwaukee | — | ◐ LIKELY ACTIVE |
| MIMatzel Industries INC | Milwaukee | — | ◐ LIKELY ACTIVE |
| MPMidwest Products and Engineering Material Service Center | Milwaukee | 1–19 | ◐ LIKELY ACTIVE |
| MMilwaukee | Milwaukee | 20–99 | ◐ LIKELY ACTIVE |
| RFRed Flag Cargo Security Systems LLC | Milwaukee | — | ◐ LIKELY ACTIVE |
| SCSupreme Cores Holdings, LLC - Milwaukee, WI Facility | Milwaukee | 20–99 | ◐ LIKELY ACTIVE |
| TCThe Chicago Faucet Company | Milwaukee | 20–99 | ◐ LIKELY ACTIVE |
| CACentrifugal Acquisition Corporation, INC. | Milwaukee | — | ◇ UNVERIFIED |
| MMMatzel Manufacturing, INC. | Milwaukee | — | ◇ UNVERIFIED |
| ACAbqc Corporation | Milwaukee | — | ◇ UNVERIFIED |
| AKA.K. Kraussel Tool & Mfg. Corp. | Milwaukee | — | ◇ UNVERIFIED |
| BGBanker Grating, LLC | Milwaukee | — | ◇ UNVERIFIED |
| BGBarnes Group INC. | Milwaukee | — | ◇ UNVERIFIED |
| BIBca Industries | Milwaukee | — | ◇ UNVERIFIED |
| BBBecker Boiler Co., INC. | Milwaukee | — | ◇ UNVERIFIED |
| BDBhp, D.b.a Global Power Components | Milwaukee | — | ◇ UNVERIFIED |
| BIBhp, INC. | Milwaukee | — | ◇ UNVERIFIED |
| BCBradley CORP | Milwaukee | — | ◇ UNVERIFIED |
| BCBrown Campbell Company | Milwaukee | — | ◇ UNVERIFIED |
| BIBucyrus International INC | Milwaukee | — | ◇ UNVERIFIED |
| CHComplete Heat Treating LLC | Milwaukee | — | ◇ UNVERIFIED |
| CSCompo Steel Products, INC. | Milwaukee | — | ◇ UNVERIFIED |
| DIDiamond Industries, INC. | Milwaukee | — | ◇ UNVERIFIED |
| DCDoral Corporation | Milwaukee | — | ◇ UNVERIFIED |
| DCDoral Corporation | Milwaukee | — | ◇ UNVERIFIED |
| EFElite Finishing LLC | Milwaukee | — | ◇ UNVERIFIED |
| ERE R Wagner Mfg CO | Milwaukee | — | ◇ UNVERIFIED |
