| TTss | Warren | MI | Machinery Manufacturing333318 | 20-99 | ◐ LIKELY ACTIVE |
| TITube-co., INC. | Warren | MI | Fabricated Metal Product Manufacturing332996 | — | ◐ LIKELY ACTIVE |
| URUnited Refining Company | Warren | PA | Petroleum and Coal Products Manufacturing324110 | 500+ | ◐ LIKELY ACTIVE |
| WWarren | Warren | MI | Fabricated Metal Product Manufacturing332812 | 20-99 | ◐ LIKELY ACTIVE |
| WWarren | Warren | NJ | Computer and Electronic Product Manufacturing334513 | 20-99 | ◐ LIKELY ACTIVE |
| WWarren | Warren | OH | Fabricated Metal Product Manufacturing332313 | 1-19 | ◐ LIKELY ACTIVE |
| WCWarren Cider Works Company | Warren | RI | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| WMWarren MI | Warren | MI | Miscellaneous Manufacturing339116 | 20-99 | ◐ LIKELY ACTIVE |
| WMWarren Michigan Plant | Warren | MI | Food Manufacturing311412 | 100-499 | ◐ LIKELY ACTIVE |
| WOWarren OH | Warren | OH | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| WTWarren Technical Center | Warren | MI | Transportation Equipment Manufacturing336310 | 500+ | ◐ LIKELY ACTIVE |
| WWelding | Warren | MI | Transportation Equipment Manufacturing336370 | 100-499 | ◐ LIKELY ACTIVE |
| WTWheatland Tube Warren | Warren | OH | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| WIWhirley Industries - Harmar Facility | Warren | PA | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| WIWhirley Industries - Molding Building | Warren | PA | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| WDWire Division | Warren | MI | Fabricated Metal Product Manufacturing332813 | 1-19 | ◐ LIKELY ACTIVE |
| WTWright Tool Company, LLC | Warren | MI | Fabricated Metal Product Manufacturing332510 | — | ◐ LIKELY ACTIVE |
| XLXmark Labs, LLC | Warren | RI | Computer and Electronic Product Manufacturing334512 | — | ◐ LIKELY ACTIVE |
| NANuts Are Good INC | Warren | MI | Food Manufacturing311911 | — | ◇ UNVERIFIED |
| ARAbruzzi Racing Transmissions, INC. | Warren | OH | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| AMAjax Materials Corporation (b4138) | Warren | MI | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AVAllegheny Valve and Coupling Company INC. | Warren | PA | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| AMAmerican Metal Processing | Warren | MI | Fabricated Metal Product Manufacturing332811 | — | ◇ UNVERIFIED |
| AWAmerican Way Manufacturing, INC. | Warren | OH | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| AZAmerican Zinc, LLC | Warren | OH | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| AIAPK Industries Inc. | Warren | OH | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| ASApplied Soil Water Technologies LLC | Warren | MI | Machinery Manufacturing333298 | — | ◇ UNVERIFIED |
| ANAptiv, North River Road (0278080051) | Warren | OH | Electrical Equipment, Appliance & Component Manufacturing335931 | — | ◇ UNVERIFIED |
| ALAquana, LLC | Warren | VT | Computer and Electronic Product Manufacturing334512 | — | ◇ UNVERIFIED |
| ASAsap Steel | Warren | MI | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| BMBard Materials-warren | Warren | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BWBdm Warren Steel Operations, LLC (0278000463) | Warren | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| BHBeehive Handmade LLC | Warren | RI | Miscellaneous Manufacturing339910 | — | ◇ UNVERIFIED |
| BSBespoke Swiss Watches, LLC | Warren | NJ | Computer and Electronic Product Manufacturing334519 | — | ◇ UNVERIFIED |
| BCBrauer Clamps USA | Warren | MI | Fabricated Metal Product Manufacturing332510 | — | ◇ UNVERIFIED |
| BFBulldog Factory Service | Warren | MI | Machinery Manufacturing333249 | — | ◇ UNVERIFIED |
| CVCardinal Valley Manufacturing LLC | Warren | OH | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| CCCentral Conveyor Company | Warren | OH | Machinery Manufacturing333922 | — | ◇ UNVERIFIED |
| CBClubhouse Brewing Co. LTD | Warren | OH | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| CHCold Heading Company | Warren | MI | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| CSConcord Steel INC | Warren | OH | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| COCurrent of Warren INC (0278080650) | Warren | OH | Textile Mills313320 | — | ◇ UNVERIFIED |
| DLDavid L. Delgarbino | Warren | OH | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| DADelphi Automotive Systems LLC | Warren | OH | Primary Metal Manufacturing331422 | — | ◇ UNVERIFIED |
| DPDelphi Packard Electric Systems | Warren | OH | Transportation Equipment Manufacturing336322 | — | ◇ UNVERIFIED |
| DPDesign Photographic Studio | Warren | MI | Transportation Equipment Manufacturing336111 | — | ◇ UNVERIFIED |
| DMDigglio Melody | Warren | MI | Furniture and Related Product Manufacturing337910 | — | ◇ UNVERIFIED |
| DRDiversified Resources Site | Warren | OH | Nonmetallic Mineral Product Manufacturing327124 | — | ◇ UNVERIFIED |
| DRD & R Wash Painting | Warren | MI | Electrical Equipment, Appliance & Component Manufacturing335991 | — | ◇ UNVERIFIED |
| DSDuramic Segments & Abrasive, LLC | Warren | MI | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
