| WBWestech Building Products | Mount Vernon | IN | — | ◇ UNVERIFIED |
| WEWest End Machine & Welding INC | Richmond | VA | — | ◇ UNVERIFIED |
| WAWestern American Machining CO INC | Cedar City | UT | — | ◇ UNVERIFIED |
| WAWestern Architectural Services LLC | Salt Lake City | UT | — | ◇ UNVERIFIED |
| WCWestern Case INC | Riverside | CA | — | ◇ UNVERIFIED |
| WCWestern Coating INC | Auburn | WA | — | ◇ UNVERIFIED |
| WEWestern Equipment Manufacturing | Corona | CA | — | ◇ UNVERIFIED |
| WFWestern Falcon | Houston | TX | — | ◇ UNVERIFIED |
| WFWestern Falcon | Odessa | TX | — | ◇ UNVERIFIED |
| WFWestern Fiber Company INC | Arvin | CA | — | ◇ UNVERIFIED |
| WFWestern Forge Die | Huntington Beach | CA | — | ◇ UNVERIFIED |
| WFWestern Forge & Flange Company | Albany | CA | — | ◇ UNVERIFIED |
 Western Industrial Contractors | Denver | CO | — | ◇ UNVERIFIED |
 Western Industries INC | Watertown | WI | — | ◇ UNVERIFIED |
| WMWestern Machine & Fab, Inc. | Union City | CA | — | ◇ UNVERIFIED |
| WMWestern Metal Decorating CO | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| WMWestern Metal Lath & Steel Framing System | Riverside | CA | — | ◇ UNVERIFIED |
| WMWestern Metal Specialty | Milwaukee | WI | — | ◇ UNVERIFIED |
| WMWestern Metals Recycling - Slc | Salt Lake City | UT | — | ◇ UNVERIFIED |
| WPWestern Pipe Coaters and Engineers | Vineyard | UT | — | ◇ UNVERIFIED |
| WPWestern Pipe Service | Birmingham | AL | — | ◇ UNVERIFIED |
| WPWestern Plating Co., INC. | Owensboro | KY | — | ◇ UNVERIFIED |
| WPWestern Polyform CORP | Riverside | CA | — | ◇ UNVERIFIED |
 Western Precision Products INC | Milwaukie | OR | — | ◇ UNVERIFIED |
 Western Products | Milwaukee | WI | — | ◇ UNVERIFIED |
| WSWestern Star Sandblasting CO. | Madera | CA | — | ◇ UNVERIFIED |
| WSWestern Supplies CO. | Saint Louis | MO | — | ◇ UNVERIFIED |
| WTWestern Threaders, INC. | Bessemer | AL | — | ◇ UNVERIFIED |
| WTWestern Trencher and Equipment INC | Woodland | CA | — | ◇ UNVERIFIED |
| WVWestern Vents & Curbs | Gilbert | AZ | — | ◇ UNVERIFIED |
| WMWestfab Manufacturing, Inc. | Santa Clara | CA | — | ◇ UNVERIFIED |
| WFWest Falls Machine CO | East Aurora | NY | — | ◇ UNVERIFIED |
 Westfield Electroplating CO | Westfield | MA | — | ◇ UNVERIFIED |
| WGWestfield Gage CO INC | Southwick | MA | — | ◇ UNVERIFIED |
| WGWestfield Grinding Wheel | Westfield | MA | — | ◇ UNVERIFIED |
| WPWestfield Plastics and Molding, LLC | Westfield | MA | — | ◇ UNVERIFIED |
| WAWestford Anodizing Corporation | Westford | MA | — | ◇ UNVERIFIED |
| WCWestgate Cleaning Village/connellsville | Connellsville | PA | — | ◇ UNVERIFIED |
| WHWest Haralson Machine, INC | Tallapoosa | GA | — | ◇ UNVERIFIED |
| WAWestinghouse Air Brake Company | Wilmerding | PA | — | ◇ UNVERIFIED |
| WMWestlake Metal Industries | Columbus | OH | — | ◇ UNVERIFIED |
| WPWestlake Plastics Co/mayfield | Mayfield | PA | — | ◇ UNVERIFIED |
| WRWestlake Royal Bldg Products Kutztown Fac | Kutztown | PA | — | ◇ UNVERIFIED |
| WRWestlake Royal Building Products Kleer | Westfield | MA | — | ◇ UNVERIFIED |
| WRWestlake Royal Windows - Baldwin Division Shipping Bld | Cornelia | GA | — | ◇ UNVERIFIED |
| WRWestlake Royal Windows (dba Krestmark Industries) | Dallas | TX | — | ◇ UNVERIFIED |
| WLWest Little York Coating Plant | Houston | TX | — | ◇ UNVERIFIED |
| WMWest Machine Products, INC. | Round Lake | IL | — | ◇ UNVERIFIED |
| WMWest Manufacturing LLC | Carol Stream | IL | — | ◇ UNVERIFIED |
| WMWest Michigan Flocking & Assembly LLC | South Haven | MI | — | ◇ UNVERIFIED |
