| UWUltimate Workmanship LLC | Cedar City | UT | — | ◇ UNVERIFIED |
| UMUmi Metalfab | Menomonee Falls | WI | — | ◇ UNVERIFIED |
| USUnico Steel, INC. | City of Industry | CA | — | ◇ UNVERIFIED |
| UTUniform Tubes INC | South Plainfield | NJ | — | ◇ UNVERIFIED |
| UMUnion Metal - Canton | Canton | OH | — | ◇ UNVERIFIED |
| UMUnion Metal Industries CORP | Canton | OH | — | ◇ UNVERIFIED |
| UTUnion Tag Manufacturing | Raiford | FL | — | ◇ UNVERIFIED |
| UMUnited Metalcraft, INC. | Marietta | GA | — | ◇ UNVERIFIED |
| UMUnited Millwright LLC | Mt Zion | IL | — | ◇ UNVERIFIED |
| UMUnited Millwright LLC | Mt Zion | IL | — | ◇ UNVERIFIED |
| UMUnited Misc & Ornamental Steel INC Dba Umo Steel INC | Union City | CA | — | ◇ UNVERIFIED |
| UPUnited Panel Corporation | Cartersville | GA | — | ◇ UNVERIFIED |
| UPUnited Panel Corporation | Griffin | GA | — | ◇ UNVERIFIED |
| USUnited Steel Fabricators INC | Rialto | CA | — | ◇ UNVERIFIED |
| USUnited Steel, INC. | Wichita | KS | — | ◇ UNVERIFIED |
| USUnited Steel Products | Largo | FL | — | ◇ UNVERIFIED |
| USUnited Steel Products Company, INC. | Livermore | CA | — | ◇ UNVERIFIED |
| USUnited Steel Works, INC. | Clearwater | FL | — | ◇ UNVERIFIED |
| USUnited Steel Works, INC. | Clearwater | FL | — | ◇ UNVERIFIED |
| USUnited Structural Works, INC. | Congers | NY | — | ◇ UNVERIFIED |
| USUnited Structures of Georgia LLC | Cairo | GA | — | ◇ UNVERIFIED |
| UEUniversal Enterprises, INC. | Shinnston | WV | — | ◇ UNVERIFIED |
| UFUniversal Fabricating & Construction Ser | Columbus | OH | — | ◇ UNVERIFIED |
| UFUniversal Fabricators, LLC | Eglin Afb | FL | — | ◇ UNVERIFIED |
| UHUniversal Head CO INC | Joliet | IL | — | ◇ UNVERIFIED |
| UMUniversal Metal Hose Company | Chicago | IL | — | ◇ UNVERIFIED |
| UOUniversal Ornamental Iron, INC. | Conyers | GA | — | ◇ UNVERIFIED |
| USUniversal Steel Fabricators, INC. | Brooklyn | NY | — | ◇ UNVERIFIED |
| USUniversal Steel of North Carolina, LLC | Thomasville | NC | — | ◇ UNVERIFIED |
| UTUniversal Tool Steel LLC | Springfield | TN | — | ◇ UNVERIFIED |
| UUnknown | Topeka | KS | — | ◇ UNVERIFIED |
| UIUnobtanium INC | Oregon City | OR | — | ◇ UNVERIFIED |
| UVUpper Valley Design LLC | Alstead | NH | — | ◇ UNVERIFIED |
| USUpright Steel Fabricators and Erectors LLC | Cleveland | OH | — | ◇ UNVERIFIED |
| UMUpson Metal Fabricators | San Jacinto | CA | — | ◇ UNVERIFIED |
| UAUrbanovsky Advanced Construction, LLC | Cleburne | TX | — | ◇ UNVERIFIED |
| USU. S. Boiler & Tube Company, INC. | Fort Payne | AL | — | ◇ UNVERIFIED |
| UBU.s. Bridge | Cambridge | OH | — | ◇ UNVERIFIED |
| UCU.s. Chutes Corporation | Bantam | CT | — | ◇ UNVERIFIED |
| ULUscoe Louisville Repair Sta | Louisville | KY | — | ◇ UNVERIFIED |
| UDU.s. Defense National Stockpile Center Point Pleasant Depot | Point Pleasant | WV | — | ◇ UNVERIFIED |
| UDU.s. Dol Osha | Chambersburg | PA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Atlanta West Ao | Acworth | GA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Springboro | OH | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Saraland | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Cowarts | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Theodore | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Carol Stream | IL | — | ◇ UNVERIFIED |
| UDUS Duct, INC. | Kernersville | NC | — | ◇ UNVERIFIED |
| UUUsemco Universal Sanitary Equipment Mfg | Tomah | WI | — | ◇ UNVERIFIED |
| UMUS Machine INC | Fairmont | WV | — | ◇ UNVERIFIED |
| UMUS Mat Systems LLC | Mcminnville | OR | — | ◇ UNVERIFIED |
| UMUS Metal Works INC | Sandy | OR | — | ◇ UNVERIFIED |
| UNUS National Steel LLC | Stuart | FL | — | ◇ UNVERIFIED |
| UPU.s. Products | San Antonio | TX | — | ◇ UNVERIFIED |
| USUsp Structural Connectors | Largo | FL | — | ◇ UNVERIFIED |
| UOUtah Ornamental and Iron | Salt Lake City | UT | — | ◇ UNVERIFIED |
| USUtah Steel INC. | Salt Lake City | UT | — | ◇ UNVERIFIED |
| USUtica Steel, Inc. | Chesterfield | MI | — | ◇ UNVERIFIED |
| UOUtility Optimization Group LLC | Pascagoula | MS | — | ◇ UNVERIFIED |
| UOUtility Optimization Group LLC | Moss Point | MS | — | ◇ UNVERIFIED |
| VIValley Iron | Lancaster | CA | — | ◇ UNVERIFIED |
| VIValley Iron Fabricators & Erectors INC | Lancaster | CA | — | ◇ UNVERIFIED |
| VMValley Machine & Welding CO. | Chattanooga | TN | — | ◇ UNVERIFIED |
| VSValley Steel Company | Saginaw | MI | — | ◇ UNVERIFIED |
| VWValley Welding Service | Mission | TX | — | ◇ UNVERIFIED |
| VWValley West Welding CO INC | Waverly | TN | — | ◇ UNVERIFIED |
| VIValmont Industries INC | Farmington | MN | — | ◇ UNVERIFIED |
| VIValmont Industries INC | Salem | OR | — | ◇ UNVERIFIED |
| VIValmont Industries INC | Elkhart | IN | — | ◇ UNVERIFIED |
| VIValmont Industries, INC. | Valley | NE | — | ◇ UNVERIFIED |
| VNValmont Newmark | Claremore | OK | — | ◇ UNVERIFIED |
| VNValmont Newmark | Hazleton | PA | — | ◇ UNVERIFIED |
| VFValmont-newmark Fab Shop | Tuscaloosa | AL | — | ◇ UNVERIFIED |
| VIValmont-newmark International, Incorporated | West Hazleton | PA | — | ◇ UNVERIFIED |
| VSValmont Structures INC Dba Pirod INC Plants 1 2 & 5 | Plymouth | IN | — | ◇ UNVERIFIED |
| VWValmont West Coast Engineering | Ferndale | WA | — | ◇ UNVERIFIED |
| VSValue Structures, INC. | Ellwood City | PA | — | ◇ UNVERIFIED |
| VSVandellen Steel INC | Dutton | MI | — | ◇ UNVERIFIED |
| VEVandergriff Enterprises, INC. Dba Hedman South | Alpharetta | GA | — | ◇ UNVERIFIED |
| VFVan Fab INC | Union Hill | IL | — | ◇ UNVERIFIED |
| VIVan Industries INC | Birdsboro | PA | — | ◇ UNVERIFIED |
 Van Linda Iron Works INC | Lake Worth | FL | — | ◇ UNVERIFIED |
| Van Linda Iron Works, INC. | West Palm Beach | FL | — | ◇ UNVERIFIED |
| VMVaughn Manufacturing Corporation | Salisbury | MA | — | ◇ UNVERIFIED |
| VPVault Pro, INC | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| VFV.b. Fabricators, INC. | Glenshaw | PA | — | ◇ UNVERIFIED |
| VWVds - West, INC. | Mesa | AZ | — | ◇ UNVERIFIED |
| VIVega Iron Works | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| VCVelocity Custom Fabrication, Inc. | Tulsa | OK | — | ◇ UNVERIFIED |
| VIVentower Industries LLC | Monroe | MI | — | ◇ UNVERIFIED |
| VCVenus Corporation | Blytheville | AR | — | ◇ UNVERIFIED |
| VMVernier Metal Fabricating, Inc. | Seymour | CT | — | ◇ UNVERIFIED |
| VWVernon Way, LLC | El Cajon | CA | — | ◇ UNVERIFIED |
| VIVersa-tech Industries INC | Tucumcari | NM | — | ◇ UNVERIFIED |
| VSVertex Steel INC | Milford | MI | — | ◇ UNVERIFIED |
| VBVery Best Steel LLC | Belleville | MI | — | ◇ UNVERIFIED |
| VHV & H Fabrication and Repairs, INC. | Jeanerette | LA | — | ◇ UNVERIFIED |
| VMVican Manufacturing Solutions LLC | Texas City | TX | — | ◇ UNVERIFIED |
| VMVictory Metal, LLC | Elkhorn City | KY | — | ◇ UNVERIFIED |
