| RERexnord Elastomer Products | New Berlin | WI | Machinery Manufacturing333613 | — | ◇ UNVERIFIED |
| RIRHP Investments LLC | Wausau | WI | Machinery Manufacturing333241 | — | ◇ UNVERIFIED |
| RCRio Creek Fabrication and Repair, LLC | Algoma | WI | Machinery Manufacturing333992 | — | ◇ UNVERIFIED |
| RJR. J. Zeman Tool & Mfg. Co., INC. | Waukesha | WI | Machinery Manufacturing333514 | — | ◇ UNVERIFIED |
| RWRockShield - WI LLC | Milltown | WI | Machinery Manufacturing333131 | — | ◇ UNVERIFIED |
| RRsg-norlake | Hudson | WI | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
 Schiller Grounds Care, INC. | Johnson Creek | WI | Machinery Manufacturing333112 | — | ◇ UNVERIFIED |
| SLScooterbugs LLC | Hayward | WI | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| SPScot Pump, INC. a Division of Ardox CORP. | Cedarburg | WI | Machinery Manufacturing333911 | — | ◇ UNVERIFIED |
| SISpecsys INC | Prentice | WI | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| SSSpidercut Systems LLC | Burlington | WI | Machinery Manufacturing333249 | — | ◇ UNVERIFIED |
| TPTetra Pak Processing Equipment INC | Windsor | WI | Machinery Manufacturing333241 | — | ▲ REPORTED CLOSED |
| TTThe Tower Company, Inc. | Two Rivers | WI | Machinery Manufacturing333914 | — | ◇ UNVERIFIED |
| TTThe Trane Company - Main Complex | La Crosse | WI | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| TUThe Urban Craftsman LLC | Milwaukee | WI | Machinery Manufacturing333243 | — | ◇ UNVERIFIED |
| TGTMK Group LLC | Milwaukee | WI | Machinery Manufacturing333992 | — | ◇ UNVERIFIED |
 Trinity Tool & Manufacturing LLC | Jackson | WI | Machinery Manufacturing333514 | — | ◇ UNVERIFIED |
| Trinity Tool & Manufacturing LLC | Brookfield | WI | Machinery Manufacturing333514 | — | ◇ UNVERIFIED |
| UEUcc Environmental | Pleasant Prairie | WI | Machinery Manufacturing333922 | — | ◇ UNVERIFIED |
| UAUniversal Acoustic & Emissions Technologies, INC. | Muscoda | WI | Machinery Manufacturing333319 | — | ◇ UNVERIFIED |
| UUUsemco Universal Sanitary Equipment Mfg | Tomah | WI | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| UIUzelac Industrial Properties, LLC | Pewaukee | WI | Machinery Manufacturing333248 | — | ◇ UNVERIFIED |
| VMVilter Manufacturing | Cudahy | WI | Machinery Manufacturing333410 | — | ◇ UNVERIFIED |
| VLVintaholdings LLC | New Berlin | WI | Machinery Manufacturing333248 | — | ◇ UNVERIFIED |
| WNWacher Neuson Logistics America (germantown) | Germantown | WI | Machinery Manufacturing333120 | — | ◇ UNVERIFIED |
| WNWacker Neuson Logistics Americas LLC | Germantown | WI | Machinery Manufacturing333120 | — | ◇ UNVERIFIED |
| WWalter-usa | Waukesha | WI | Machinery Manufacturing333515 | — | ◇ UNVERIFIED |
| WEWarrens Equipment Company, INC. | Warrens | WI | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| WEWeasler Engineering, INC. | West Bend | WI | Machinery Manufacturing333613 | — | ◇ UNVERIFIED |
| WSWeir Slurry Group, INC. | Oak Creek | WI | Machinery Manufacturing333613 | — | ◇ UNVERIFIED |
| WMWolniak Machine CORP | Cornell | WI | Machinery Manufacturing333515 | — | ◇ UNVERIFIED |
| WMWorldWide Machining & Welding, Inc | Superior | WI | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| XIXetex, INC. | La Crosse | WI | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| XWXylem Water Solutions | Pewaukee | WI | Machinery Manufacturing333914 | — | ◇ UNVERIFIED |
