| GPGlobal Power Components-Chase/Oklahoma | Milwaukee | WI | Fabricated Metal Product Manufacturing332311 | 100-499 | ◐ LIKELY ACTIVE |
| GHGood Hope | Milwaukee | WI | Paper Manufacturing322291 | 20-99 | ◐ LIKELY ACTIVE |
| H8HellermannTyton 87th | Milwaukee | WI | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| HGHellermannTyton GH | Milwaukee | WI | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
Hentzen Coatings, Inc. Corporate | Milwaukee | WI | Chemical Manufacturing325510 | 100-499 | ◐ LIKELY ACTIVE |
| HMHydrite Milwaukee MKE - 7300 Bradley | Milwaukee | WI | Chemical Manufacturing325180 | 20-99 | ◐ LIKELY ACTIVE |
| IEImagen Energy INC | Milwaukee | WI | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ▲ REPORTED CLOSED |
| IBIndeed Brewing Company | Milwaukee | WI | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| IRIndustrial Road | Milwaukee | WI | Paper Manufacturing322291 | 20-99 | ◐ LIKELY ACTIVE |
| IMIn-place Machining Company, LLC | Milwaukee | WI | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| IMIntegrated Mail Industries LTD | Milwaukee | WI | Printing and Related Support Activities323111 | — | ▲ REPORTED CLOSED |
| ICIntelligent Composites LLC | Milwaukee | WI | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |
| ITInternational Thermal Systems LLC | Milwaukee | WI | Machinery Manufacturing333994 | — | ◐ LIKELY ACTIVE |
| KWKent Water Sports, LLC - Barefoot | Milwaukee | WI | Miscellaneous Manufacturing339920 | 20-99 | ◐ LIKELY ACTIVE |
| KTKleen Test Products - Parkland Court | Milwaukee | WI | Textile Mills313230 | 20-99 | ◐ LIKELY ACTIVE |
| KMKoziol Manufacturing LLC | Milwaukee | WI | Fabricated Metal Product Manufacturing332721 | — | ◐ LIKELY ACTIVE |
| KLKriete Leasing & Rental LLC | Milwaukee | WI | Machinery Manufacturing333924 | — | ◐ LIKELY ACTIVE |
| LPLeader Paper Products, Inc. - Ninth Street | Milwaukee | WI | Paper Manufacturing322230 | 1-19 | ◐ LIKELY ACTIVE |
| LYLesaffre Yeast Corporation-Corporate Office | Milwaukee | WI | Food Manufacturing311999 | 100-499 | ◐ LIKELY ACTIVE |
| LFLindsay Foods, Inc. | Milwaukee | WI | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| LLLineage Logistics LLC | Milwaukee | WI | — | — | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US WI Milwaukee Tower Ave (5283) | Milwaukee | WI | Transportation Equipment Manufacturing336411 | 100-499 | ◐ LIKELY ACTIVE |
| MTMainStage Theatrical Supply | Milwaukee | WI | Miscellaneous Manufacturing339999 | 20-99 | ◐ LIKELY ACTIVE |
| MMMalteurop Milwaukee | Milwaukee | WI | Food Manufacturing311213 | 20-99 | ◐ LIKELY ACTIVE |
| MCManitowoc Company Corporate | Milwaukee | WI | Machinery Manufacturing333120 | 20-99 | ◐ LIKELY ACTIVE |
| MBMarket Boxx Community Workshop LLC | Milwaukee | WI | Miscellaneous Manufacturing339999 | — | ◐ LIKELY ACTIVE |
Marking Services Installation, Inc. | Milwaukee | WI | Printing and Related Support Activities323111 | 1-19 | ◐ LIKELY ACTIVE |
| MEMary E Pasbrig | Milwaukee | WI | Paper Manufacturing322299 | 20-99 | ◐ LIKELY ACTIVE |
| MMMaterion - Milwaukee | Milwaukee | WI | Chemical Manufacturing325180 | 100-499 | ◐ LIKELY ACTIVE |
| MIMerisco, Inc. | Milwaukee | WI | Textile Mills313230 | 20-99 | ◐ LIKELY ACTIVE |
| MPMidwest Products and Engineering Material Service Center | Milwaukee | WI | Fabricated Metal Product Manufacturing332999 | 1-19 | ◐ LIKELY ACTIVE |
| MRMidwest Refrigerated Milwaukee, Inc. | Milwaukee | WI | — | — | ◐ LIKELY ACTIVE |
| MMilwaukee | Milwaukee | WI | Fabricated Metal Product Manufacturing332722 | 20-99 | ◐ LIKELY ACTIVE |
| MPMilwaukee Plant | Milwaukee | WI | Food Manufacturing311611 | 100-499 | ◐ LIKELY ACTIVE |
| MWMilwaukee, Wi | Milwaukee | WI | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| MWMilwaukee, WI - 321 | Milwaukee | WI | Wood Product Manufacturing321920 | 20-99 | ◐ LIKELY ACTIVE |
| MWMilwaukee, WI Transpak | Milwaukee | WI | Wood Product Manufacturing321920 | 20-99 | ◐ LIKELY ACTIVE |
| MMke | Milwaukee | WI | Plastics and Rubber Products Manufacturing326111 | 20-99 | ◐ LIKELY ACTIVE |
| MOMKE Office | Milwaukee | WI | Miscellaneous Manufacturing339930 | 1-19 | ◐ LIKELY ACTIVE |
| MCMolson Coors Beverage Company USA | Milwaukee | WI | Beverage and Tobacco Product Manufacturing312120 | 500+ | ◐ LIKELY ACTIVE |
| MEMotive Equipment | Milwaukee | WI | Machinery Manufacturing333415 | 20-99 | ◐ LIKELY ACTIVE |
| OLOshkosh Logistics CORP | Milwaukee | WI | Transportation Equipment Manufacturing336120 | — | ◐ LIKELY ACTIVE |
| OHOverseas Hardwoods Company - Wisconsin | Milwaukee | WI | Wood Product Manufacturing321918 | 1-19 | ◐ LIKELY ACTIVE |
| PSPackaging Solutions, Inc. | Milwaukee | WI | Paper Manufacturing322211 | 20-99 | ◐ LIKELY ACTIVE |
| PMPAC Machinery Bags & Materials | Milwaukee | WI | Plastics and Rubber Products Manufacturing326111 | 20-99 | ◐ LIKELY ACTIVE |
| PTPak Technologies - 35th and Capital - Salt | Milwaukee | WI | Chemical Manufacturing325998 | 20-99 | ◐ LIKELY ACTIVE |
| PTPak Technologies - Granville | Milwaukee | WI | Food Manufacturing311999 | 20-99 | ◐ LIKELY ACTIVE |
| PTPak Technologies - Townsend | Milwaukee | WI | Chemical Manufacturing325998 | 1-19 | ◐ LIKELY ACTIVE |
| PHPax Holdings, LLC | Milwaukee | WI | Printing and Related Support Activities323111 | — | ◐ LIKELY ACTIVE |
| PSPCC Structurals SSB1 | Milwaukee | OR | Primary Metal Manufacturing331512 | 20-99 | ◐ LIKELY ACTIVE |