| TTechline | Waunakee | WI | Wood Product Manufacturing321219 | — | ◇ UNVERIFIED |
| TITecomet INC | Kenosha | WI | Fabricated Metal Product Manufacturing332721 | — | ◇ UNVERIFIED |
| TPTecumseh Products Co-grafton Operations | Grafton | WI | Machinery Manufacturing333112 | — | ◇ UNVERIFIED |
| TPTecumseh Products Co-new Holstein Operations | New Holstein | WI | Machinery Manufacturing333112 | — | ◇ UNVERIFIED |
| TGTed Grob Corporation | Grafton | WI | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| TDTeel Das, LLC | Baraboo | WI | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| TFTekni-plex Flexibles LLC | Milwaukee | WI | Paper Manufacturing322220 | — | ◇ UNVERIFIED |
| TCTekra CORP Coating/laminating Div | New Berlin | WI | Paper Manufacturing322210 | — | ◇ UNVERIFIED |
| TUTerex Utilities | Waukesha | WI | Machinery Manufacturing333923 | — | ◇ UNVERIFIED |
| TATextron Aviation INC | Milwaukee | WI | Transportation Equipment Manufacturing336411 | — | ◇ UNVERIFIED |
| TGTextron Gse - Premier | Marinette | WI | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| TAThe Antigo Cheese Company | Antigo | WI | Food Manufacturing311513 | — | ◇ UNVERIFIED |
| TCThe Carlson CO | Madison | WI | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| TGThe Gund Company, INC. | Milwaukee | WI | Plastics and Rubber Products Manufacturing326130 | — | ◇ UNVERIFIED |
 The Printery | New Berlin | WI | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| TEThermo Electron CORP. | Madison | WI | Computer and Electronic Product Manufacturing334510 | — | ◇ UNVERIFIED |
| TTThe Trane Company - Main Complex | La Crosse | WI | Machinery Manufacturing333410 | — | ◇ UNVERIFIED |
| TVThe Vollrath Company LLC | Kewaunee | WI | Primary Metal Manufacturing331319 | — | ◇ UNVERIFIED |
| TPThilmany Papers Nicolet Mill | Depere | WI | Paper Manufacturing322120 | — | ◇ UNVERIFIED |
| TCTimber Creek Resource, LLC | Milwaukee | WI | Wood Product Manufacturing321920 | 20-99 | ◇ UNVERIFIED |
| TAToshiba America Energy Systems CORP | West Allis | WI | Machinery Manufacturing333611 | — | ◇ UNVERIFIED |
| TMTramont Manufacturing LLC | Milwaukee | WI | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| TMTramont Manufacturing LLC | Milwaukee | WI | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| TPTrane Plt 7 Manufacturing | La Crosse | WI | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| TCTransportation Center | Wisconsin Rapids | WI | Paper Manufacturing322100 | — | ◇ UNVERIFIED |
| TCTrempealeau County Highway Dept | Whitehall | WI | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| TCTri Clover INC | Kenosha | WI | Fabricated Metal Product Manufacturing332900 | — | ◇ UNVERIFIED |
| TLTrostel LTD | Lake Geneva | WI | Plastics and Rubber Products Manufacturing326291 | — | ◇ UNVERIFIED |
| TWTrostel Wm-1 | Whitewater | WI | Plastics and Rubber Products Manufacturing326291 | — | ◇ UNVERIFIED |
| TITrudell Industrial Finishing | Depere | WI | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| TLTru Line Lithographing INC | Sturtevant | WI | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| TATrw Automotive | Ettrick | WI | Transportation Equipment Manufacturing336320 | — | ◇ UNVERIFIED |
| TST Shirts International | Oak Creek | WI | Apparel Manufacturing315990 | — | ◇ UNVERIFIED |
| TTTufco Technologies INC | Green Bay | WI | Textile Mills313230 | — | ◇ UNVERIFIED |
| TGTweet Garot Mechanical, INC. | Tomahawk | WI | Fabricated Metal Product Manufacturing332000 | — | ◇ UNVERIFIED |
| TFTwist Farm Equipment | Elkhorn | WI | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| UMUmi Metalfab | Menomonee Falls | WI | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| UCUnderwood Crossing | Brookfield | WI | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| UMUnited Milwaukee Scrap | Milwaukee | WI | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| UMUnited Milwaukee Scrap, LLC | Milwaukee | WI | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| ULUniversal Lithographers | Sheboygan | WI | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| USUniversal Silencer - Plant 22 | Montello | WI | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| USU S Filter - Plymouth Products Division | Sheboygan | WI | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
| UDUti / Diversey Distribution Center | Sturtevant | WI | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| UTUtility Tool and Trailer | Clintonville | WI | Fabricated Metal Product Manufacturing332000 | — | ◇ UNVERIFIED |
| VIValiant, INC. | Madison | WI | Miscellaneous Manufacturing339930 | 1-19 | ◇ UNVERIFIED |
| VPValley Plating of Green Bay LLC | Green Bay | WI | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| VSValley Sales CORP Dba Spectra Print CORP | Stevens Point | WI | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| VMVilter Manufacturing Corporation - Milwaukee | Milwaukee | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| VCVishay Cera Mite | Oconto | WI | Computer and Electronic Product Manufacturing334414 | — | ◇ UNVERIFIED |
