| IMInnovative Machining LLC | Neenah | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| JCJbt Corporation | Grafton | WI | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| JDJ & D Tube Benders INC | Schofield | WI | Fabricated Metal Product Manufacturing332996 | 100-499 | ◐ LIKELY ACTIVE |
| KTKaravan Trailers, INC | Fox Lake | WI | Fabricated Metal Product Manufacturing332999 | 100-499 | ◐ LIKELY ACTIVE |
| KIKees INC | Elkhart Lake | WI | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| KMKickhaefer Manufacturing Company, LLC | Port Washington | WI | Fabricated Metal Product Manufacturing332116 | 100-499 | ◐ LIKELY ACTIVE |
| KBKrueger Bearings INC | Milwaukee | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| KEKusel Equipment CO | Watertown | WI | Fabricated Metal Product Manufacturing332913 | 20-99 | ◐ LIKELY ACTIVE |
| LTLannon Tank CORP | Lannon | WI | Fabricated Metal Product Manufacturing332420 | 20-99 | ◐ LIKELY ACTIVE |
Laserform LLC | De Pere | WI | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MTMahuta Tool Corp | Germantown | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| MMMathison Manufacturing | Waukesha | WI | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| MTMerrill Tool & Water Jet, LLC | Merrill | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| MOMetalcraft of Mayville-beaver Dam | Beaver Dam | WI | Fabricated Metal Product Manufacturing332322 | 100-499 | ◐ LIKELY ACTIVE |
| MOMetalcraft of Mayville - Fall River | Fall River | WI | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| MIMetalStorm, Inc. | DePere | WI | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| MTMillennium Technologies LLC | Plymouth | WI | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| MFMilwaukee Forgetech INC. | Milwaukee | WI | Primary Metal Manufacturing331111 | 100-499 | ◐ LIKELY ACTIVE |
| MMMilwaukee Metal Products CO | Milwaukee | WI | Fabricated Metal Product Manufacturing332999 | 1-19 | ◐ LIKELY ACTIVE |
| MPMilwaukee Plating CO | Milwaukee | WI | Fabricated Metal Product Manufacturing332810 | 20-99 | ◐ LIKELY ACTIVE |
| MIMuthig Industries INC | Fond Du Lac | WI | Fabricated Metal Product Manufacturing332116 | 20-99 | ◐ LIKELY ACTIVE |
| NPNational Presto Industries INC | Eau Claire | WI | Paper Manufacturing322291 | 100-499 | ◐ LIKELY ACTIVE |
| NTNeosho Trompler Inc | Hartland | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| NFNiagara Fabrication INC. | Niagara | WI | Fabricated Metal Product Manufacturing332313 | 20-99 | ◐ LIKELY ACTIVE |
| NINigrelli INC | Kiel | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| NINorlen Incorporated | Schofield | WI | Fabricated Metal Product Manufacturing332313 | 100-499 | ◐ LIKELY ACTIVE |
| PHParker Hannifin CORP Quick Cou Div | Grantsburg | WI | Fabricated Metal Product Manufacturing332700 | — | ◐ LIKELY ACTIVE |
| PHPoclain Hydraulics INC | Sturtevant | WI | Fabricated Metal Product Manufacturing332990 | 100-499 | ◐ LIKELY ACTIVE |
| RBR & B Wagner INC | Milwaukee | WI | Fabricated Metal Product Manufacturing332323 | 100-499 | ◐ LIKELY ACTIVE |
| RPReliable Plating Works-13th Street | Milwaukee | WI | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| RMRenco Machine Co., INC. | Green Bay | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| SCSaelens CORP | Johnson Creek | WI | Fabricated Metal Product Manufacturing332722 | 20-99 | ◐ LIKELY ACTIVE |
| STSchaefer Tool and Manufacturing CO. INC. | Milwaukee | WI | Fabricated Metal Product Manufacturing332111 | 20-99 | ◐ LIKELY ACTIVE |
| SMSchuette Metals | Rothschild | WI | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| SBSchwing Bioset | Somerset | WI | Fabricated Metal Product Manufacturing332322 | 100-499 | ◐ LIKELY ACTIVE |
| SFSeneca Foods CORP | Baraboo | WI | Fabricated Metal Product Manufacturing332430 | 100-499 | ◐ LIKELY ACTIVE |
| SShurpac | Racine | WI | Wood Product Manufacturing321920 | 20-99 | ◐ LIKELY ACTIVE |
| SMSimply Mfg INC | Prairie Du Sac | WI | Fabricated Metal Product Manufacturing332312 | 1-19 | ◐ LIKELY ACTIVE |
| SMSonoco Metal Packaging LLC | Milwaukee | WI | Fabricated Metal Product Manufacturing332430 | 100-499 | ◐ LIKELY ACTIVE |
| SFSpirit Fabs INC | Wrightstown | WI | Fabricated Metal Product Manufacturing332310 | 20-99 | ◐ LIKELY ACTIVE |
| SKSteel King Industries INC | Stevens Point | WI | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| SISteelwind Industries | Oak Creek | WI | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| SMSussek Machine CORP | Waterloo | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| TJThe Jor-mac CO INC. | Lomira | WI | Fabricated Metal Product Manufacturing332322 | 100-499 | ◐ LIKELY ACTIVE |
| TSThermal Spray Technologies | Sun Prairie | WI | Chemical Manufacturing325510 | 100-499 | ◐ LIKELY ACTIVE |
| TVThe Vollrath Company, LLC | Sheboygan | WI | Fabricated Metal Product Manufacturing332110 | 500+ | ◐ LIKELY ACTIVE |
| TEThorp Equipment INC | Thorp | WI | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| TBTrachte Building Systems, INC. | Sun Prairie | WI | Fabricated Metal Product Manufacturing332311 | 100-499 | ◐ LIKELY ACTIVE |
| TMTriangle Manufacturing Company | Oshkosh | WI | Fabricated Metal Product Manufacturing332116 | 20-99 | ◐ LIKELY ACTIVE |
| TTTriangle Tool, LLC | Milwaukee | WI | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |