| NBNew Berlin MODS Supply Emmer Facility | New Berlin | WI | Machinery Manufacturing333923 | 20-99 | ◐ LIKELY ACTIVE |
| NHNew Holstein | New Holstein | WI | Machinery Manufacturing333112 | 1-19 | ◐ LIKELY ACTIVE |
Nexstep INC | Little Chute | WI | Machinery Manufacturing333120 | — | ◐ LIKELY ACTIVE |
| NMNicholson Manufacturing, Inc | Ixonia | WI | Machinery Manufacturing333318 | 20-99 | ◐ LIKELY ACTIVE |
| NCNova Coil | Franklin | WI | Machinery Manufacturing333415 | 20-99 | ◐ LIKELY ACTIVE |
| OMO&A Manufacturing | Brooklyn | WI | Machinery Manufacturing333514 | 20-99 | ◐ LIKELY ACTIVE |
| OMOa Manufacturing INC | Verona | WI | Machinery Manufacturing333514 | 20-99 | ◐ LIKELY ACTIVE |
| ONOilgear New Berlin | New Berlin | WI | Machinery Manufacturing333914 | 1-19 | ◐ LIKELY ACTIVE |
| OOmega | Menomonee Falls | WI | Machinery Manufacturing333511 | 20-99 | ◐ LIKELY ACTIVE |
| OMOptima Machinery USA Corporation | Green Bay | WI | Machinery Manufacturing333993 | 100-499 | ◐ LIKELY ACTIVE |
| PCPentair Commercial Ice, LLC | Manitowoc | WI | Machinery Manufacturing333415 | 100-499 | ◐ LIKELY ACTIVE |
| PWPeterson's Welding and Machine | Green Bay | WI | Machinery Manufacturing333514 | 20-99 | ◐ LIKELY ACTIVE |
| PIPillar Induction - Brookfield | Brookfield | WI | Machinery Manufacturing333999 | 20-99 | ◐ LIKELY ACTIVE |
| PTPillar Technologies | Hartland | WI | Machinery Manufacturing333993 | 20-99 | ◐ LIKELY ACTIVE |
| P1Plant 1 | Sussex | WI | Machinery Manufacturing333514 | 20-99 | ◐ LIKELY ACTIVE |
| PCPowernail Company | Genoa City | WI | Machinery Manufacturing333991 | 20-99 | ◐ LIKELY ACTIVE |
| PSPower Systems Division - South & Warehouse | Appleton | WI | Machinery Manufacturing333992 | 100-499 | ◐ LIKELY ACTIVE |
| PSPower Systems Division - West | Appleton | WI | Machinery Manufacturing333992 | 20-99 | ◐ LIKELY ACTIVE |
| PTPrecision Thermal Processing | Clintonville | WI | Machinery Manufacturing333994 | 20-99 | ◐ LIKELY ACTIVE |
| PWPrecision Welding Systems Division | Appleton | WI | Machinery Manufacturing333992 | 100-499 | ◐ LIKELY ACTIVE |
| PPPremierOne Products, Inc | Pulaski | WI | Machinery Manufacturing333413 | 20-99 | ◐ LIKELY ACTIVE |
| PPPremier Paper Converting Machinery | New Berlin | WI | Machinery Manufacturing333993 | 20-99 | ◐ LIKELY ACTIVE |
| PPPrism Plastics Products, INC. | New Richdmond | WI | Machinery Manufacturing333249 | 20-99 | ◐ LIKELY ACTIVE |
| PTProvisur Technologies Whitewater | Whitewater | WI | Machinery Manufacturing333241 | 100-499 | ◐ LIKELY ACTIVE |
| PAPutzmeister America Inc | Sturtevant | WI | Machinery Manufacturing333120 | 100-499 | ◐ LIKELY ACTIVE |
| QIQuest Industrial | Monroe | WI | Machinery Manufacturing333993 | 20-99 | ◐ LIKELY ACTIVE |
| QMQuest Middleton | Middleton | WI | Machinery Manufacturing333993 | 1-19 | ◐ LIKELY ACTIVE |
| RBRed Beacon | Milwaukee | WI | Machinery Manufacturing333991 | 500+ | ◐ LIKELY ACTIVE |
| RRRegal Rexnord - Canal Street | Milwaukee | WI | Machinery Manufacturing333612 | 100-499 | ◐ LIKELY ACTIVE |
| RLRenewAire LLC | Waunakee | WI | Machinery Manufacturing333413 | 100-499 | ◐ LIKELY ACTIVE |
| RLRenewAire LLC - Dane | Dane | WI | Machinery Manufacturing333413 | 1-19 | ◐ LIKELY ACTIVE |
| RPResearch Products Corporation - Aprilaire - Poynette Plant | Poynette | WI | Machinery Manufacturing333413 | 100-499 | ◐ LIKELY ACTIVE |
| RPResearch Products, Madison Campus - AprilAire Plant, Tech Center | Madison | WI | Machinery Manufacturing333413 | 100-499 | ◐ LIKELY ACTIVE |
Rice Lake Weighing Systems, Rice Lake | Rice Lake | WI | Machinery Manufacturing333998 | 500+ | ◐ LIKELY ACTIVE |
| RORichfield Office/Shop | Richfield | WI | Machinery Manufacturing333120 | 20-99 | ◐ LIKELY ACTIVE |
| RCRotork Controls | Milwaukee | WI | Machinery Manufacturing333995 | 20-99 | ◐ LIKELY ACTIVE |
| RCRPS Corporation | Racine | WI | Machinery Manufacturing333318 | 100-499 | ◐ LIKELY ACTIVE |
| SMSchuette Manitowoc | Manitowoc | WI | Machinery Manufacturing333111 | 20-99 | ◐ LIKELY ACTIVE |
| SPServer Products Inc | Richfield | WI | Machinery Manufacturing333310 | 100-499 | ◐ LIKELY ACTIVE |
| S2Shop 2 | Marshfield | WI | Machinery Manufacturing333241 | 20-99 | ◐ LIKELY ACTIVE |
| STSiemag Tecberg INC | Milwaukee | WI | Machinery Manufacturing333131 | — | ◐ LIKELY ACTIVE |
| SMSkarlupka Manufacturing Inc. | White Lake | WI | Machinery Manufacturing333922 | 20-99 | ◐ LIKELY ACTIVE |
| SMSouth Milwaukee Facility | South Milwaukee | WI | Machinery Manufacturing333131 | 100-499 | ◐ LIKELY ACTIVE |
| STSpan Tech LLC, WI | Waukesha | WI | Machinery Manufacturing333922 | 1-19 | ◐ LIKELY ACTIVE |
| SGSpring Green AG | Spring Green | WI | Machinery Manufacturing333248 | 20-99 | ◐ LIKELY ACTIVE |
| STStainless Technologies | Menomonie, WI | WI | Machinery Manufacturing333241 | 20-99 | ◐ LIKELY ACTIVE |
| SStampline | La Crosse | WI | Machinery Manufacturing333514 | 20-99 | ◐ LIKELY ACTIVE |
| SAStar Automation Inc. | Menomonee Falls | WI | Machinery Manufacturing333998 | 20-99 | ◐ LIKELY ACTIVE |
| SStateline | Beloit | WI | Machinery Manufacturing333611 | 100-499 | ◐ LIKELY ACTIVE |
| SISterling, Inc. | New Berlin | WI | Machinery Manufacturing333248 | 100-499 | ◐ LIKELY ACTIVE |