| UDUnited Duralume Products, INC. | Anaheim | CA | — | ◇ UNVERIFIED |
| UEUnited Engine & Machine Company | Carson City | NV | — | ◇ UNVERIFIED |
| UFUnited Fasteners Drilling INC | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| ULUnited Lifttrucks | Huntington Park | CA | — | ◇ UNVERIFIED |
| UMUnited Machine Works | Houston | TX | — | ◇ UNVERIFIED |
| UMUnited Metal Fabrication INC | Colorado Springs | CO | — | ◇ UNVERIFIED |
| UMUnited Metals Construction | Philadelphia | PA | — | ◇ UNVERIFIED |
| UMUnited Milwaukee Scrap LLC | Burnsville | MN | — | ◇ UNVERIFIED |
| UMUnited Milwaukee Scrap of Minnesota | Burnsville | MN | — | ◇ UNVERIFIED |
| UMUnited Motorsports | Yucaipa | CA | — | ◇ UNVERIFIED |
 United Safety Apparatus Dba Safe T Plus Steering Control | Tallapoosa | GA | — | ◇ UNVERIFIED |
| USUnited Services INC. | Knoxville | TN | — | ◇ UNVERIFIED |
| USUnited Sheet Metal Works and Steel Fabricators, INC. | Plant City | FL | — | ◇ UNVERIFIED |
| USUnited States Postal Service | Fillmore | CA | — | ◇ UNVERIFIED |
| USUnited Steel Works Inc | Moody | AL | — | ◇ UNVERIFIED |
| USUnited Structure Solution, Inc. | College Point | NY | — | ◇ UNVERIFIED |
| UTUnited Tooler of Illinois | Loves Park | IL | — | ◇ UNVERIFIED |
| UFUnity Fabric INC. Dba Yc Textile | Los Angeles | CA | — | ◇ UNVERIFIED |
| UFUnivacco Foils Corporation | Cerritos | CA | — | ◇ UNVERIFIED |
| UIUnivance INC | Winchester | KY | — | ◇ UNVERIFIED |
| UUniversal | Cloverdale | VA | — | ◇ UNVERIFIED |
| UAUniversal Auto Repairs Services LLC | Sacramento | CA | — | ◇ UNVERIFIED |
| UCUniversal Carbide | Santa Cruz | CA | — | ◇ UNVERIFIED |
| UCUniversal Core INC Dba As Rpm Rebuilders | Rialto | CA | — | ◇ UNVERIFIED |
| UFUniversal Fabricating and Construction Services | Groveport | OH | — | ◇ UNVERIFIED |
| UFUniversal Fabricators, LLC | Bay City | TX | — | ◇ UNVERIFIED |
| UFUniversal Fireproof Door Co., Inc. | Brentwood | NY | — | ◇ UNVERIFIED |
| UIUniversal Industries LLC | Tomahawk | WI | — | ◇ UNVERIFIED |
| UMUniversal Machine Shop LLC | Mayfield | KY | — | ◇ UNVERIFIED |
| UMUniversal Manufacturing & Design, LLC | Greer | SC | — | ◇ UNVERIFIED |
| UMUniversal Marine & Industrial Services | Mobile | AL | — | ◇ UNVERIFIED |
| UMUniversal Molding Extrusion CO | Downey | CA | — | ◇ UNVERIFIED |
| UMUniversal Motor Oil | Compton | CA | — | ◇ UNVERIFIED |
| USUniversal Stainless INC | Clear Lake | MN | — | ◇ UNVERIFIED |
| USUniversal Steel Services, INC. | San Bernardino | CA | — | ◇ UNVERIFIED |
| UTUniversal Tool Inc. | Troy | MI | — | ◇ UNVERIFIED |
| UTUniversal Truck Equipments LLC | Medley | FL | — | ◇ UNVERIFIED |
| UVUniversal Value Added Services Dba Westport Axle C | Louisville | KY | — | ◇ UNVERIFIED |
| UWUniversal Welding & Fabrication INC. | North Pole | AK | — | ◇ UNVERIFIED |
| UHUniversity House | Fullerton | CA | — | ◇ UNVERIFIED |
| UIUnlimited Industrial Services, LLC | Belle Glade | FL | — | ◇ UNVERIFIED |
| UEUpper Edge Solutions, LLC | Holland | NY | — | ◇ UNVERIFIED |
| URUSA Rebuilders | Hawthorne | CA | — | ◇ UNVERIFIED |
| UTUSA Today National Rack Center | Murfreesboro | TN | — | ◇ UNVERIFIED |
| UCUS Car Tool, LLC | Graham | NC | — | ◇ UNVERIFIED |
| UDU.s. Department of the Treasury - U.s. Mint | San Francisco | CA | — | ◇ UNVERIFIED |
| UUsdol | Lubbock | TX | — | ◇ UNVERIFIED |
| UWUsdol-osha-atlanta West | Mableton | GA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Xenia | OH | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Auburn | AL | — | ◇ UNVERIFIED |
