| 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 |
| NCNolato Contour | Baldwin | WI | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| NINor-lake INC | Hudson | WI | Machinery Manufacturing333415 | 100-499 | ◐ LIKELY ACTIVE |
| NINorlen Incorporated | Schofield | WI | Fabricated Metal Product Manufacturing332313 | 100-499 | ◐ LIKELY ACTIVE |
| NCNorth Country Lumber | Mellen | WI | Wood Product Manufacturing321113 | 20-99 | ◐ LIKELY ACTIVE |
| NCNorthern Crossarm INC | Chippewa Falls | WI | Wood Product Manufacturing321114 | 20-99 | ◐ LIKELY ACTIVE |
| NWNorth Wood Flooring | Coleman | WI | Wood Product Manufacturing321918 | 20-99 | ◐ LIKELY ACTIVE |
| OSOcean Spray Cranberries, INC. | Kenosha | WI | Food Manufacturing311411 | 100-499 | ◐ LIKELY ACTIVE |
| OGOutlook Group LLC | Neenah | WI | Printing and Related Support Activities323110 | 100-499 | ◐ LIKELY ACTIVE |
| PPPackerland Packing Company - Lime Kiln Rd Facility | Green Bay | WI | Food Manufacturing311610 | — | ◐ LIKELY ACTIVE |
| PPacur | Oshkosh | WI | Plastics and Rubber Products Manufacturing326110 | 100-499 | ◐ LIKELY ACTIVE |
| PHPalmer Hamilton LLC | Elkhorn | WI | Furniture and Related Product Manufacturing337127 | 100-499 | ◐ LIKELY ACTIVE |
| PBPaper Box and Specialty Company | Sheboygan | WI | Paper Manufacturing322212 | 20-99 | ◐ LIKELY ACTIVE |
| PHParker Hannifin CORP Quick Cou Div | Grantsburg | WI | Fabricated Metal Product Manufacturing332700 | — | ◐ LIKELY ACTIVE |
| PPPark Printing House LTD | Verona | WI | Printing and Related Support Activities323110 | 20-99 | ◐ LIKELY ACTIVE |
| PCPerlick Corporation | Milwaukee | WI | Machinery Manufacturing333248 | 100-499 | ◐ LIKELY ACTIVE |
| PLPhilipp Lithographing CO | Grafton | WI | Printing and Related Support Activities323110 | 20-99 | ◐ LIKELY ACTIVE |
| PPPlastic Parts INC | Union Grove | WI | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| PEPlastics Engineering CO. | Sheboygan | WI | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| PIPlastocon INC | Oconomowoc | WI | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| PHPoclain Hydraulics INC | Sturtevant | WI | Fabricated Metal Product Manufacturing332990 | 100-499 | ◐ LIKELY ACTIVE |
| PAPremier Aluminum INC | Racine | WI | Primary Metal Manufacturing331521 | 20-99 | ◐ LIKELY ACTIVE |
| PCPremold CORP | Oconomowoc | WI | Paper Manufacturing322223 | 20-99 | ◐ LIKELY ACTIVE |
| PCPrestige Custom Cabinetry and Millwork Inc | Green Bay | WI | Furniture and Related Product Manufacturing337110 | 20-99 | ◐ LIKELY ACTIVE |
| PPPrint Pro INC | Wrightstown | WI | Printing and Related Support Activities323111 | 100-499 | ◐ LIKELY ACTIVE |
| PGProcter & Gamble Paper Products - Fox River Plant | Green Bay | WI | Paper Manufacturing322120 | 500+ | ◐ LIKELY ACTIVE |
| PEPro Ex Extrusion | Oshkosh | WI | Plastics and Rubber Products Manufacturing326112 | 20-99 | ◐ LIKELY ACTIVE |
| PFProfile Finishing Systems LLC | Kaukauna | WI | Chemical Manufacturing325510 | 100-499 | ◐ LIKELY ACTIVE |
| PCProgressive Converting Appleton Campus | Appleton | WI | Paper Manufacturing322299 | 100-499 | ◐ LIKELY ACTIVE |
| PPromega | Madison | WI | Chemical Manufacturing325413 | 500+ | ◐ LIKELY ACTIVE |
| PProtect-all | Darien | WI | Plastics and Rubber Products Manufacturing326112 | 20-99 | ◐ LIKELY ACTIVE |
| RIRamrod Industries LLC | Spencer | WI | Machinery Manufacturing333995 | 20-99 | ◐ 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 |
| RIRetroflex INC | Wrightstown | WI | Paper Manufacturing322299 | 20-99 | ◐ LIKELY ACTIVE |
| RIRexnord Industries LLC Gear Group | Milwaukee | WI | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| RIRockline Industries | Sheboygan | WI | Paper Manufacturing322299 | — | ◐ LIKELY ACTIVE |
| RORock Oil Refining INC | Stratford | WI | Petroleum and Coal Products Manufacturing324110 | 20-99 | ◐ LIKELY ACTIVE |
| SASaco Aei Polymers | Sheboygan | WI | Chemical Manufacturing325199 | 100-499 | ◐ LIKELY ACTIVE |
| SCSaelens CORP | Johnson Creek | WI | Fabricated Metal Product Manufacturing332722 | 20-99 | ◐ LIKELY ACTIVE |
Saputo Cheese USA INC - Black Creek Div | Black Creek | WI | Food Manufacturing311513 | 20-99 | ◐ LIKELY ACTIVE |
| STSchaefer Tool and Manufacturing CO. INC. | Milwaukee | WI | Fabricated Metal Product Manufacturing332111 | 20-99 | ◐ LIKELY ACTIVE |
| SFSchreiber Foods INC - Richland Center West | Richland Center | WI | Food Manufacturing311510 | 100-499 | ◐ LIKELY ACTIVE |
| SMSchuette Metals | Rothschild | WI | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| SPSchumann Printers INC | Fall River | WI | Printing and Related Support Activities323110 | 100-499 | ◐ LIKELY ACTIVE |
Schwabe North America Incorporated | Green Bay | WI | Chemical Manufacturing325411 | — | ◐ LIKELY ACTIVE |
| SBSchwing Bioset | Somerset | WI | Fabricated Metal Product Manufacturing332322 | 100-499 | ◐ LIKELY ACTIVE |
| SCS C Johnson & Son INC (howe Street Campus) | Racine | WI | Chemical Manufacturing325612 | 500+ | ◐ LIKELY ACTIVE |