| WMWestern Maine Steel Inc | West Paris | ME | — | ◇ UNVERIFIED |
| WMWestern Metal Lath & Steel Framing System | Riverside | CA | — | ◇ UNVERIFIED |
| WMWestern Metal Specialty | Milwaukee | WI | — | ◇ UNVERIFIED |
| WNWestern New York Manufacturing | Buffalo | NY | — | ◇ UNVERIFIED |
| WPWestern Precision Manufacturing LLC | Grand Junction | CO | — | ◇ UNVERIFIED |
 Western Precision Products INC | Milwaukie | OR | — | ◇ UNVERIFIED |
| WSWestern Steel Fabricators INC | Huntington Park | CA | — | ◇ UNVERIFIED |
| WUWestern Utility Telecom | Salem | OR | — | ◇ UNVERIFIED |
| WVWestern Vents & Curbs | Gilbert | AZ | — | ◇ UNVERIFIED |
| WMWestfab Manufacturing, Inc. | Santa Clara | CA | — | ◇ UNVERIFIED |
| WGWestfield Gage CO INC | Southwick | MA | — | ◇ UNVERIFIED |
| WHWest Haralson Machine, INC | Tallapoosa | GA | — | ◇ UNVERIFIED |
| WMWest Machine Products, INC. | Round Lake | IL | — | ◇ UNVERIFIED |
| WMWest Michigan Grinding and Machine | Muskegon | MI | — | ◇ UNVERIFIED |
| WIWestmor Industries LLC - Truck Shop | Morris | MN | — | ◇ UNVERIFIED |
| WOWest Ouachita Steel & Tank* | West Monroe | LA | — | ◇ UNVERIFIED |
| WFWestside Fabrication and Machining | Plymouth | MI | — | ◇ UNVERIFIED |
| WSWest Side Fabrication, LLC | Colorado Springs | CO | — | ◇ UNVERIFIED |
| WSWest Side Machine Tool | Elkhorn | WI | — | ◇ UNVERIFIED |
| WSWest Side Tool & Die CO | Kingston | PA | — | ◇ UNVERIFIED |
| WSWest Star Construction | Kingsburg | CA | — | ◇ UNVERIFIED |
| WSWest Star Manufacturing | Downey | CA | — | ◇ UNVERIFIED |
| WVWest Virginia Steel CORP | Charleston | WV | — | ◇ UNVERIFIED |
| WVWest Virginia Steel CORP | Poca | WV | — | ◇ UNVERIFIED |
| WVWest Virginia Steel Corporation | Poca | WV | — | ◇ UNVERIFIED |
| WWWest Warwick Welding, INC. | West Warwick | RI | — | ◇ UNVERIFIED |
| WBWg Benjey INC | Alpena | MI | — | ◇ UNVERIFIED |
| WGWgs Global Services Lc | Marinette | WI | — | ◇ UNVERIFIED |
| WCWheco CORP | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| WEWheelabrator Energy Systems | Sturbridge | MA | — | ◇ UNVERIFIED |
| WCWheeling Corrugating CO | Gary | IN | — | ◇ UNVERIFIED |
| WMWheeling Machine Pine Bluff | White Hall | AR | — | ◇ UNVERIFIED |
 Whelan Machine & Tool LLC | Louisville | KY | — | ◇ UNVERIFIED |
| WMWhetstone Machine INC | Winona | MN | — | ◇ UNVERIFIED |
| WEWhitacre Engineering CO | Liverpool | NY | — | ◇ UNVERIFIED |
| WBWhite Bear Makerspace | White Bear Township | MN | — | ◇ UNVERIFIED |
| WEWhite Eagle Machine Shop | Tucson | AZ | — | ◇ UNVERIFIED |
| WFWhite Fab INC | Birmingham | AL | — | ◇ UNVERIFIED |
| WRWhite Racker CO INC | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| WPWhitesell Precision Components INC | Watson | IN | — | ◇ UNVERIFIED |
| WMWhites Machine Shop | Springfield | MO | — | ◇ UNVERIFIED |
| WSWhites Steel, Inc. | Indio | CA | — | ◇ UNVERIFIED |
| WEWhitham Enterprises | Moscow | KS | — | ◇ UNVERIFIED |
| WPWhitley Products, INC. | Plymouth | IN | — | ◇ UNVERIFIED |
| WGWhittier Grinding | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| WSWholesale Sheet Metal INC. | Kansas City | KS | — | ◇ UNVERIFIED |
| WBWicked Bumpers,LLC | Dawson | NE | — | ◇ UNVERIFIED |
| WMWieber Machine, LLC | Green Bay | WI | — | ◇ UNVERIFIED |
| WRWiegmann & Rose | Oakland | CA | — | ◇ UNVERIFIED |
| WSWie Sic Machine, INC. | Lowell | MA | — | ◇ UNVERIFIED |
| WTWiesmann Tool Inc. | Alpharetta | GA | — | ◇ UNVERIFIED |
| WPWiggby Precision Machine CORP | Brooklyn | NY | — | ◇ UNVERIFIED |
| WSWil-clair Sheet Metal, LLC | North Kansas City | MO | — | ◇ UNVERIFIED |
| WMWilco Mach and Fabrication INC / Nov Wilco North | Marlow | OK | — | ◇ UNVERIFIED |
| WWWildeck West Dba Ladder Industries | Goodyear | AZ | — | ◇ UNVERIFIED |
| WDWilderness Design & Manufacturing INC | Orem | UT | — | ◇ UNVERIFIED |
| WMWildridge Machine, LLC | Lexington | TN | — | ◇ UNVERIFIED |
| WMWildwood Metals, INC. | Fresno | CA | — | ◇ UNVERIFIED |
 Willamette Technical Fabricators, LLC | Portland | OR | — | ◇ UNVERIFIED |
| WVWillamette Valley Company - Precision Technologies | Eugene | OR | — | ◇ UNVERIFIED |
| WAWillenborg Associates, INC. | Imlay City | MI | — | ◇ UNVERIFIED |
| WCWilliam Collins Company | Central Falls | RI | — | ◇ UNVERIFIED |
| WDWilliam D Ludlow | Ontario | CA | — | ◇ UNVERIFIED |
| WJWilliam J Labb Sons | Philadelphia | PA | — | ◇ UNVERIFIED |
| WRWilliam R Tiffany & Linda E Tiffany | Vale | OR | — | ◇ UNVERIFIED |
| WBWilliams Bridge Company | Bessemer | AL | — | ◇ UNVERIFIED |
| WCWilliams Company INC. | Whiting | KS | — | ◇ UNVERIFIED |
| WSWilliam Scott | Oaklyn | NJ | — | ◇ UNVERIFIED |
| WDWilliams & Davis Boilers | Hutchins | TX | — | ◇ UNVERIFIED |
| WFWilliams Fabrication, INC. Dba Jenfab | Covington | VA | — | ◇ UNVERIFIED |
| WMWilliams Machine Works INC | Moss Point | MS | — | ◇ UNVERIFIED |
| WMWilliams Machine Works Inc, Facility Number 2 | Pascagoula | MS | — | ◇ UNVERIFIED |
| WMWilliams Manufacturing | Lake Elsinore | CA | — | ◇ UNVERIFIED |
| WSWilliam's Steel Company | Jackson | TN | — | ◇ UNVERIFIED |
| WSWilliams Steel Company | Greensboro | NC | — | ◇ UNVERIFIED |
| WFWilliamstown Fabricators INC | Parkersburg | WV | — | ◇ UNVERIFIED |
| WCWillis Commercial, LLC | Windsor | CT | — | ◇ UNVERIFIED |
| WMWill-share Manufacturing, INC. | Saint Peters | MO | — | ◇ UNVERIFIED |
| WMWilo Machine CO | Cedarburg | WI | — | ◇ UNVERIFIED |
| WUWilo USA | Cedarburg | WI | — | ◇ UNVERIFIED |
| WEWilson Equipment Repair INC | Morgantown | WV | — | ◇ UNVERIFIED |
| WMWilson Machine LLC | Arcola | MO | — | ◇ UNVERIFIED |
| WMWilson Mold & Machine Corporation | Wilson | NC | — | ◇ UNVERIFIED |
| WRWilson Railing & Metal Fabricating Company | Park City | IL | — | ◇ UNVERIFIED |
| WTWilson Tool Corporation | Rockford | IL | — | ◇ UNVERIFIED |
| WCWilton Corporation | Finksburg | MD | — | ◇ UNVERIFIED |
| WTWinbco Tank Company, INC. | Hugoton | KS | — | ◇ UNVERIFIED |
| WRWinding Roofing Company INC. | Wauwatosa | WI | — | ◇ UNVERIFIED |
| WHWindmill Holdings, LLC | Hamilton | MT | — | ◇ UNVERIFIED |
| WSWindsor Steel , INC | Elkhart | IN | — | ◇ UNVERIFIED |
| WIW Industries | Detroit | MI | — | ◇ UNVERIFIED |
| WKWindy Knoll Machine, LLC | Sugarcreek | OH | — | ◇ UNVERIFIED |
| WHWinona Heating - Ventilating Company | Winona | MN | — | ◇ UNVERIFIED |
| WIWinston Industries, INC. | Ivyland | PA | — | ◇ UNVERIFIED |
| WMWinterville Machine Works, INC | Winterville | NC | — | ◇ UNVERIFIED |
| WIWirecrafters, INC. | Louisville | KY | — | ◇ UNVERIFIED |
| WMWiregrass Machine, INC. | Dothan | AL | — | ◇ UNVERIFIED |
| WSWireless Structures Consulting INC | Salem | OR | — | ◇ UNVERIFIED |
 Wisconsin Oven CORP | East Troy | WI | — | ◇ UNVERIFIED |
| WMWiser Manufacturing | Benson | UT | — | ◇ UNVERIFIED |
