| MEMayville Engineering Company INC | Neillsville | WI | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| MIMerkle-korff Industries | Richland Center | WI | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| NINafco International INC | Fond Du Lac | WI | Electrical Equipment, Appliance & Component Manufacturing335132 | — | ◇ UNVERIFIED |
| RCRayovac CORP Madison | Madison | WI | Electrical Equipment, Appliance & Component Manufacturing335910 | — | ◇ UNVERIFIED |
| RRRegal Rexnord - Black River Falls | Black River Falls | WI | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| RCRexnord Corporation | Milwaukee | WI | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
Rockwell Automation INC | Mequon | WI | Electrical Equipment, Appliance & Component Manufacturing335310 | — | ◇ UNVERIFIED |
| SGSchunk Graphite Technology | Slinger | WI | Electrical Equipment, Appliance & Component Manufacturing335990 | — | ◇ UNVERIFIED |
| STSpx Transformer Solutions INC | Waukesha | WI | Electrical Equipment, Appliance & Component Manufacturing335310 | — | ◇ UNVERIFIED |
| SFSub-zero Freezer CO INC | Madison | WI | Electrical Equipment, Appliance & Component Manufacturing335200 | — | ◇ UNVERIFIED |
| SZSub Zero/wolf | Fitchburg | WI | Electrical Equipment, Appliance & Component Manufacturing335220 | — | ◇ UNVERIFIED |
Accratech, INC. | Necedah | WI | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◐ LIKELY ACTIVE |
| ASAmerican Superconductor Corporation - Wisconsin | Pewaukee | WI | Electrical Equipment, Appliance & Component Manufacturing335999 | 1-19 | ◐ LIKELY ACTIVE |
| ACAndis Company - Renaissance | Sturtevant | WI | Electrical Equipment, Appliance & Component Manufacturing335210 | 100-499 | ◐ LIKELY ACTIVE |
| AGAppleton Group, LLC | South Milwaukee | WI | Electrical Equipment, Appliance & Component Manufacturing335932 | 100-499 | ◐ LIKELY ACTIVE |
| BEBevco Engineering | Sussex | WI | Electrical Equipment, Appliance & Component Manufacturing335313 | 20-99 | ◐ LIKELY ACTIVE |
| DEDash Enterprises INC | Milwaukee | WI | Electrical Equipment, Appliance & Component Manufacturing335139 | — | ◐ LIKELY ACTIVE |
| ESEngineering Specialists, Inc. | Brookfield | WI | Electrical Equipment, Appliance & Component Manufacturing335314 | 100-499 | ◐ LIKELY ACTIVE |
| EErmco | Bristol | WI | Electrical Equipment, Appliance & Component Manufacturing335311 | 100-499 | ◐ LIKELY ACTIVE |
| EETC (Mazomanie) | Mazomanie | WI | Electrical Equipment, Appliance & Component Manufacturing335129 | 100-499 | ◐ LIKELY ACTIVE |
| EETC (Middleton) | Middleton | WI | Electrical Equipment, Appliance & Component Manufacturing335129 | 500+ | ◐ LIKELY ACTIVE |
| ECExcel Connection | Milwaukee | WI | Electrical Equipment, Appliance & Component Manufacturing335931 | 100-499 | ◐ LIKELY ACTIVE |
| FFranklin | Franklin | WI | Electrical Equipment, Appliance & Component Manufacturing335312 | 100-499 | ◐ LIKELY ACTIVE |
| HEHydro Electronic Devices, Inc. | Hartford | WI | Electrical Equipment, Appliance & Component Manufacturing335314 | 20-99 | ◐ LIKELY ACTIVE |
| IWiA Wisconsin | Fond Du Lac | WI | Electrical Equipment, Appliance & Component Manufacturing335313 | 20-99 | ◐ LIKELY ACTIVE |
| IEImagen Energy INC | Milwaukee | WI | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ▲ REPORTED CLOSED |
| IEIMS Engineered Products - New Berlin | New Berlin | WI | Electrical Equipment, Appliance & Component Manufacturing335931 | 20-99 | ◐ LIKELY ACTIVE |
| IMISE Mount Pleasant | Mount Pleasant | WI | Electrical Equipment, Appliance & Component Manufacturing335228 | 100-499 | ◐ LIKELY ACTIVE |
| IAITW Appliance Components | New Berlin | WI | Electrical Equipment, Appliance & Component Manufacturing335314 | 20-99 | ◐ LIKELY ACTIVE |
| JEJohnson Electric Coil Co., Inc | Antigo | WI | Electrical Equipment, Appliance & Component Manufacturing335311 | 20-99 | ◐ LIKELY ACTIVE |
| KIKurz Industrial Solutions | Neenah | WI | Electrical Equipment, Appliance & Component Manufacturing335312 | 100-499 | ◐ LIKELY ACTIVE |
| MEMadison Electrolyte Blending Facility | Madison | WI | Electrical Equipment, Appliance & Component Manufacturing335910 | 1-19 | ◐ LIKELY ACTIVE |
| MFMenomonee Falls Technical Center | Menomonee Falls | WI | Electrical Equipment, Appliance & Component Manufacturing335313 | 100-499 | ◐ LIKELY ACTIVE |
| MGMes Group, LLC | Brookfield | WI | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◐ LIKELY ACTIVE |
| MMilwaukee | Milwaukee | WI | Fabricated Metal Product Manufacturing332722 | 20-99 | ◐ LIKELY ACTIVE |
| MIMotibera, INC. | Madison | WI | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◐ LIKELY ACTIVE |
| NBNew Berlin - 16250 W Glendale Drive | New Berlin | WI | Electrical Equipment, Appliance & Component Manufacturing335314 | 100-499 | ◐ LIKELY ACTIVE |
| OCOak Creek | Oak Creek | WI | Electrical Equipment, Appliance & Component Manufacturing335312 | 100-499 | ◐ LIKELY ACTIVE |
| OAOlb Associates LLC | Delafield | WI | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◐ LIKELY ACTIVE |
| OOsceola | Osceola | WI | Fabricated Metal Product Manufacturing332999 | 100-499 | ◐ LIKELY ACTIVE |
| PPPleasant Prairie | Pleasant Prairie | WI | Plastics and Rubber Products Manufacturing326112 | 100-499 | ◐ LIKELY ACTIVE |
| RSRaffel Systems LLC | Germantown | WI | Electrical Equipment, Appliance & Component Manufacturing335311 | 20-99 | ◐ LIKELY ACTIVE |
| RRRegal Rexnord | Black River Falls | WI | Electrical Equipment, Appliance & Component Manufacturing335312 | 100-499 | ◐ LIKELY ACTIVE |
| RRehlko | Sheboygan | WI | Electrical Equipment, Appliance & Component Manufacturing335312 | 500+ | ◐ LIKELY ACTIVE |
Rockwell Automation - Mequon | Mequon | WI | Electrical Equipment, Appliance & Component Manufacturing335314 | 500+ | ◐ LIKELY ACTIVE |
Rockwell Automation - MKE Airport | Milwaukee | WI | Electrical Equipment, Appliance & Component Manufacturing335314 | 1-19 | ◐ LIKELY ACTIVE |
Rockwell Automation - Richland Center | Richland Center | WI | Electrical Equipment, Appliance & Component Manufacturing335314 | 100-499 | ◐ LIKELY ACTIVE |
S&C Electric Company Franklin | Franklin | WI | Electrical Equipment, Appliance & Component Manufacturing335313 | 100-499 | ◐ LIKELY ACTIVE |
| SFSheboygan Falls | Sheboygan Falls | WI | Electrical Equipment, Appliance & Component Manufacturing335314 | 20-99 | ◐ LIKELY ACTIVE |
| S2Sps 202 | Winneconne | WI | Electrical Equipment, Appliance & Component Manufacturing335313 | 100-499 | ◐ LIKELY ACTIVE |