| AAAlsco American Industrial Div | Milwaukee | WI | Fabricated Metal Product Manufacturing332000 | — | ◇ UNVERIFIED |
| AMAlwin Manufacturing CO | Green Bay | WI | Fabricated Metal Product Manufacturing332110 | — | ◇ UNVERIFIED |
| ASAmazon.com Services LLC - Dml2 | Sussex | WI | Miscellaneous Manufacturing339920 | — | ◇ UNVERIFIED |
| APAmcor Packaging, INC. | Oshkosh | WI | Plastics and Rubber Products Manufacturing326112 | — | ◇ UNVERIFIED |
| ACAmerequip CORP Plant 2 | New Holstein | WI | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| AAAmerican Asphalt of Wi (plant 22-shop-lab) | Mosinee | WI | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| ARAmerican Roller Company, LLC - Arcotech Plant | Kansasville | WI | Plastics and Rubber Products Manufacturing326190 | — | ◇ UNVERIFIED |
 American Tool Company (formerly Irwin) | Cumberland | WI | Fabricated Metal Product Manufacturing332212 | — | ◇ UNVERIFIED |
| ABAmerica's Best Quality Coatings CORP | Milwaukee | WI | Fabricated Metal Product Manufacturing332810 | — | ◇ UNVERIFIED |
| ALAmericold Logistics | Plover | WI | Food Manufacturing311411 | — | ◇ UNVERIFIED |
| AMAmpco Metal Manufacturing INC | Milwaukee | WI | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| ADAmpi-portage Div | Portage | WI | Food Manufacturing311513 | — | ◇ UNVERIFIED |
| AFAndritz Fabrics and Rolls | Neenah | WI | Machinery Manufacturing333243 | — | ◇ UNVERIFIED |
| ALAngelo Luppino, INC. | Hurley | WI | Petroleum and Coal Products Manufacturing324120 | — | ◇ UNVERIFIED |
| AIApplegate Insulation | Bloomer | WI | Paper Manufacturing322299 | — | ◇ UNVERIFIED |
| AMApplied Molded Products Corporation | Watertown | WI | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| AIAppvion INC Hancock Site B | Appleton | WI | Paper Manufacturing322220 | — | ◇ UNVERIFIED |
| APApv Prods | Lake Mills | WI | Machinery Manufacturing333241 | — | ◇ UNVERIFIED |
| ADArcher Daniels Midland Company | Stanley | WI | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| ALArcron LLC | Menomonee Falls | WI | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| AIArcways, Incorporated | Neenah | WI | Wood Product Manufacturing321918 | 20-99 | ◇ UNVERIFIED |
| ACArkema Coating Resins | Saukville | WI | Chemical Manufacturing325210 | — | ◇ UNVERIFIED |
| AIAshland INC | Johnson Creek | WI | Chemical Manufacturing325210 | — | ◇ UNVERIFIED |
 Astec Industries, Pdc | Prairie Du Chien | WI | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| ACAstronautics CORP of America | Milwaukee | WI | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| ALAugust Lotz CO INC | Boyd | WI | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| AWAutomated Wire Products | Germantown | WI | Fabricated Metal Product Manufacturing332610 | — | ◇ UNVERIFIED |
| ALAvoca LLC a Division of Ashland | Menomonee Falls | WI | Food Manufacturing311930 | — | ◇ UNVERIFIED |
| AWA W Oakes and Son INC | Racine | WI | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BCBadger Coating Incorporated | Milwaukee | WI | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| BMBadger Mining Corporation - Taylor Coating Plant | Taylor | WI | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| BPBadger Press Photographics INC | Kenosha | WI | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| BMBall Metalpack, LLC | De Forest | WI | Fabricated Metal Product Manufacturing332431 | — | ◇ UNVERIFIED |
| BSBanta Specialty Converting | Milwaukee | WI | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| BPBarton Precision | West Bend | WI | Fabricated Metal Product Manufacturing332720 | — | ◇ UNVERIFIED |
| BFBasler Flight Service | Oshkosh | WI | Transportation Equipment Manufacturing336413 | — | ◇ UNVERIFIED |
| BMBassett Mechanical INC | Kaukauna | WI | Primary Metal Manufacturing331200 | — | ◇ UNVERIFIED |
| BTBayside Timber Corporation | Ashland | WI | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| BLBeamaco, LLC | Manitowoc | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◇ UNVERIFIED |
| BDBeaver Dam Manufacturing | Beaver Dam | WI | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| BQBecks Quality Cabinets, INC. | Green Bay | WI | Furniture and Related Product Manufacturing337110 | 20-99 | ◇ UNVERIFIED |
| BABell Aromatics | Milwaukee | WI | Chemical Manufacturing325400 | — | ◇ UNVERIFIED |
| BMBemis Mfg CO - Plant D | Sheboygan Falls | WI | Plastics and Rubber Products Manufacturing326100 | — | ◇ UNVERIFIED |
| BBBergamot Brass Works INC | Delavan | WI | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| BCBeyer Custom Cabinets, LTD. | West Salem | WI | Furniture and Related Product Manufacturing337110 | 20-99 | ◇ UNVERIFIED |
| BIBg Industrial Solutions LLC | De Pere | WI | Paper Manufacturing322110 | — | ◇ UNVERIFIED |
| BIBilsons Industries(formerly B & K Finishing) | Milwaukee | WI | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| BBBimbo Bakeries USA INC | Madison | WI | Food Manufacturing311810 | — | ◇ UNVERIFIED |
| BBBimbo Bakeries USA INC | La Crosse | WI | Food Manufacturing311810 | — | ◇ UNVERIFIED |
| BMBirchwood Mfg CO | Rice Lake | WI | Wood Product Manufacturing321211 | — | ◇ UNVERIFIED |
