| WCWestfab Custom Fabrication, LLC | Worden | MT | — | ◇ 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 Star Construction | Kingsburg | CA | — | ◇ UNVERIFIED |
| WVWest Virginia Steel CORP | Poca | WV | — | ◇ UNVERIFIED |
| WVWest Virginia Steel CORP | Charleston | WV | — | ◇ UNVERIFIED |
| WVWest Virginia Steel Corporation | Poca | WV | — | ◇ UNVERIFIED |
| WWWest Warwick Welding, INC. | West Warwick | RI | — | ◇ UNVERIFIED |
| WNW.f. Norman Corporation | Nevada | MO | — | ◇ UNVERIFIED |
| WCWheco CORP | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| WEWheelabrator Energy Systems | Sturbridge | MA | — | ◇ UNVERIFIED |
 Whelan Machine & Tool LLC | Louisville | KY | — | ◇ UNVERIFIED |
| WWWhetstone Workshop LLC | East Providence | RI | — | ◇ UNVERIFIED |
| WEWhitacre Engineering CO | Liverpool | NY | — | ◇ UNVERIFIED |
| WFWhite Fab INC | Birmingham | AL | — | ◇ UNVERIFIED |
| WSWhites Steel, Inc. | Indio | CA | — | ◇ UNVERIFIED |
| WBWicked Bumpers,LLC | Dawson | NE | — | ◇ UNVERIFIED |
| WRWiegmann & Rose | Oakland | CA | — | ◇ UNVERIFIED |
| WSWil-clair Sheet Metal, LLC | North Kansas City | MO | — | ◇ UNVERIFIED |
| WMWilco Mach and Fabrication INC / Nov Wilco North | Marlow | OK | — | ◇ UNVERIFIED |
| WBWilcox Brothers INC | Walnut Grove | CA | — | ◇ UNVERIFIED |
| WWWildeck West Dba Ladder Industries | Goodyear | AZ | — | ◇ UNVERIFIED |
| WDWilkins Design & Mfg INC Dba Wilschur Design & Mfg INC | Santa Ana | CA | — | ◇ UNVERIFIED |
 Willamette Technical Fabricators, LLC | Portland | OR | — | ◇ UNVERIFIED |
| WDWilliam D Ludlow | Ontario | CA | — | ◇ UNVERIFIED |
| WBWilliams Bridge Company | Bessemer | AL | — | ◇ UNVERIFIED |
| WDWilliams & Davis Boilers | Hutchins | TX | — | ◇ UNVERIFIED |
| WMWilliams Machine Works INC | Moss Point | MS | — | ◇ UNVERIFIED |
| WMWilliams Machine Works Inc, Facility Number 2 | Pascagoula | MS | — | ◇ UNVERIFIED |
| WSWilliam's Steel Company | Jackson | TN | — | ◇ UNVERIFIED |
| WSWilliams Steel Company | Greensboro | NC | — | ◇ UNVERIFIED |
| WFWilliamstown Fabricators INC | Parkersburg | WV | — | ◇ UNVERIFIED |
| WMWill-share Manufacturing, INC. | Saint Peters | MO | — | ◇ UNVERIFIED |
| WHWilmer Hernandez | Spring | TX | — | ◇ UNVERIFIED |
| WEWilson Equipment Repair INC | Morgantown | WV | — | ◇ UNVERIFIED |
| WCWilton Corporation | Finksburg | MD | — | ◇ UNVERIFIED |
| WTWinbco Tank Company, INC. | Hugoton | KS | — | ◇ UNVERIFIED |
| WSWindsor Steel , INC | Elkhart | IN | — | ◇ UNVERIFIED |
| WIW Industries | Detroit | MI | — | ◇ UNVERIFIED |
| WIWirecrafters, INC. | Louisville | KY | — | ◇ UNVERIFIED |
| WSWireless Structures Consulting INC | Salem | OR | — | ◇ UNVERIFIED |
 Wisconsin Oven CORP | East Troy | WI | — | ◇ UNVERIFIED |
| WWWishart Welding & General Fabrication INC | Clackamas | OR | — | ◇ UNVERIFIED |
| WSWitts Services, LLC | Bergholz | OH | — | ◇ UNVERIFIED |
| WCWizard Control Systems INC | Salem | OR | — | ◇ UNVERIFIED |
| WPWjm Partners INC. | East Bernard | TX | — | ◇ UNVERIFIED |
| WHWl Hall Company | Hopkins | MN | — | ◇ UNVERIFIED |
| WVWnco Valve International, INC. | Odessa | TX | — | ◇ UNVERIFIED |
