| USUnited Structure Solution, Inc. | College Point | NY | — | ◇ UNVERIFIED |
| UTUnited Tooler of Illinois | Loves Park | IL | — | ◇ UNVERIFIED |
| UFUnivacco Foils Corporation | Cerritos | CA | — | ◇ UNVERIFIED |
| UCUniversal Carbide | Santa Cruz | CA | — | ◇ UNVERIFIED |
 Universal Compressor Solutions LLC | Mayfield | KY | — | ◇ 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 |
| UIUniversal Iron Works, INC | Pacoima | CA | — | ◇ 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 |
| URUniversal Roll Forming INC | Lindon | UT | — | ◇ UNVERIFIED |
| USUniversal Sign Co., LLC | Lafayette | LA | — | ◇ UNVERIFIED |
| USUniversal Sign & Lighting LLC | Fairbanks | AK | — | ◇ UNVERIFIED |
| USUniversal Signs | Hasbrouck Heights | NJ | — | ◇ UNVERIFIED |
| USUniversal Signs CORP. | Hampton Bays | NY | — | ◇ UNVERIFIED |
| USUniversal Signs INC | Woodbury | MN | — | ◇ 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 |
| UWUniversal Welding & Fabrication INC. | North Pole | AK | — | ◇ UNVERIFIED |
| UUnknown | Topeka | KS | — | ◇ UNVERIFIED |
| UCUnknown Contractor | Forsyth | IL | — | ◇ UNVERIFIED |
| UIUnlimited Industrial Services, LLC | Belle Glade | FL | — | ◇ UNVERIFIED |
| UEUpper Edge Solutions, LLC | Holland | NY | — | ◇ UNVERIFIED |
| UPUpstate Permits LLC | Mauldin | SC | — | ◇ UNVERIFIED |
| ULUsaroboticmachiine LLC | Eaton Rapids | MI | — | ◇ UNVERIFIED |
| UTUSA Today National Rack Center | Murfreesboro | TN | — | ◇ UNVERIFIED |
| USU. S. Boiler & Tube Company, INC. | Fort Payne | AL | — | ◇ UNVERIFIED |
| UCU.s. Chutes Corporation | Bantam | CT | — | ◇ UNVERIFIED |
| UDU.s. Department of the Treasury - U.s. Mint | San Francisco | CA | — | ◇ UNVERIFIED |
| UDUS Design & Execute LLC | North Little Rock | AR | — | ◇ UNVERIFIED |
| UKUsdoe Kansas City National Security Campus | Kansas City | MO | — | ◇ UNVERIFIED |
| UKUsdoe Kansas City National Security Campus Building 23 | Kansas City | MO | — | ◇ UNVERIFIED |
| UUsdol | Lubbock | TX | — | ◇ UNVERIFIED |
| UDU.s. Dol Osha | Chambersburg | PA | — | ◇ UNVERIFIED |
| UDUS Dol Osha - Andover Area Office | Boxborough | MA | — | ◇ UNVERIFIED |
| UWUsdol-osha-atlanta West | Mableton | GA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Xenia | OH | — | ◇ UNVERIFIED |
| UOUsdol Osha - Concord Area Office | Rollinsford | NH | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Sterling | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha - St. Louis Area Office | Maryland Heights | MO | — | ◇ UNVERIFIED |
| UOUsdol Osha - Tampa Ao | Tampa | FL | — | ◇ UNVERIFIED |
| UDUS Duct, INC. | Kernersville | NC | — | ◇ UNVERIFIED |
| UIUsg Interiors LLC | Stockton | CA | — | ◇ UNVERIFIED |
| ULUS Led Signs | Dallas | TX | — | ◇ UNVERIFIED |
