| UAUnibody Auto Collision | Chicago | IL | — | ◇ UNVERIFIED |
| UFUnicorn Factory LLC | Portland | OR | — | ◇ UNVERIFIED |
| UIUniek, INC. | Greenwood | MS | — | ◇ UNVERIFIED |
| UFUni Fab INC | East Saint Louis | IL | — | ◇ UNVERIFIED |
| U7Union 76 | Oak Park | IL | — | ◇ UNVERIFIED |
| U7Union 76 Car Wash | Chicago | IL | — | ◇ UNVERIFIED |
| UBUnion Business Center | Cheektowaga | NY | — | ◇ UNVERIFIED |
| UCUnion County State Pond Water Plant | Jonesboro | IL | — | ◇ UNVERIFIED |
| UPUnion Pacific | Bellwood | IL | — | ◇ UNVERIFIED |
| UPUnion Pacific Railroad | Chicago | IL | — | ◇ UNVERIFIED |
| UPUnion Pallet & Container CO | Coldwater | MI | — | ◇ UNVERIFIED |
| UPUnion Partners Upx CORP Dba Lamination Specialities CORP LLC | Chicago | IL | — | ◇ UNVERIFIED |
| UFUnique Forest Products, INC | Bonners Ferry | ID | — | ◇ UNVERIFIED |
| UMUnique Marble | Vero Beach | FL | — | ◇ UNVERIFIED |
| UPUnique Pallet | Mount Prospect | IL | — | ◇ UNVERIFIED |
| UPUnique Placement Corporation | Contoocook | NH | — | ◇ UNVERIFIED |
| UCUni-sim Corporation | Lisbon Falls | ME | — | ◇ UNVERIFIED |
| UAUnited Airlines Ahnoc | Arlington Heights | IL | — | ◇ UNVERIFIED |
| UBUnited Bark Products | Orland | CA | — | ◇ UNVERIFIED |
| UBUnited Biologics INC | Santa Ana | CA | — | ◇ UNVERIFIED |
| UBUnited Biologics INC | Irvine | CA | — | ◇ UNVERIFIED |
| UBUnited Building Center | Breese | IL | — | ◇ UNVERIFIED |
| UCUnited Cartage INC | Hickory Hills | IL | — | ◇ UNVERIFIED |
| UDUnited Design CORP Noble Facity | Nobile | OK | — | ◇ UNVERIFIED |
| UDUnited Design Corp/noble Figurine Plt | Noble | OK | — | ◇ UNVERIFIED |
| UMUnited Memorial Bible Services INC | Gastonia | NC | — | ◇ UNVERIFIED |
| UMUnited Mulch and Soil | Orland | CA | — | ◇ UNVERIFIED |
| UPUnited Packaging INC | Reedsville | WI | — | ◇ UNVERIFIED |
| UPUnited Personnel Services, INC. | Whately | MA | — | ◇ UNVERIFIED |
| URUnited Rentals | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| USUnited Science Industries | Dix | IL | — | ◇ UNVERIFIED |
| USUnited Science Industries INC | Okawville | IL | — | ◇ UNVERIFIED |
 United States Gypsum | Fremont | CA | — | ◇ UNVERIFIED |
| United States Gypsum CO | Boston | MA | — | ◇ UNVERIFIED |
| United States Gypsum CO | Stony Point | NY | — | ◇ UNVERIFIED |
| United States Gypsum Company | Crystal River | FL | — | ◇ UNVERIFIED |
| USUnited Sugars Producers & Refiners Cooperative-chicago | Chicago | IL | — | ◇ UNVERIFIED |
| UWUnited Wholesale Lumber CO | Visalia | CA | — | ◇ UNVERIFIED |
| UWUnited Wire Craft, INC. | Des Plaines | IL | — | ◇ UNVERIFIED |
| U5Unity 5 INC | Deerfield | IL | — | ◇ UNVERIFIED |
| UHUnity Hardwoods | Bedford Park | IL | — | ◇ UNVERIFIED |
| USUnivar Solutions USA INC. | Carteret | NJ | — | ◇ UNVERIFIED |
| UCUniversal Carpentry Innovations Company LLC | Commerce City | CO | — | ◇ UNVERIFIED |
| UCUniversal Casket Mfr Corp. | Los Angeles | CA | — | ◇ UNVERIFIED |
| UFUniversal Forest Products Grandview, LLC | Grandview | TX | — | ◇ UNVERIFIED |
| UMUniversal Moorecraft Reel and Recycling | Tarboro | NC | — | ◇ UNVERIFIED |
| UPUniversal Pallet, INC. | Bourbonnais | IL | — | ◇ UNVERIFIED |
| USUniversal Sawmill | Bungay | IL | — | ◇ UNVERIFIED |
| UUUniversal Used Pallets, INC. | Miami | FL | — | ◇ UNVERIFIED |
| UFUniversity Frames INC | Anaheim | CA | — | ◇ UNVERIFIED |
| UOUniversity of California, Davis | Davis | CA | — | ◇ UNVERIFIED |
| UPUniversity Park Golo | University Park | IL | — | ◇ UNVERIFIED |
| USUniversity Service | Decatur | IL | — | ◇ UNVERIFIED |
| UUnknown | Salem | OR | — | ◇ UNVERIFIED |
| UUnknown | Salida | CA | — | ◇ UNVERIFIED |
| UPU Pallets | Thermal | CA | — | ◇ UNVERIFIED |
| URUpper Rock Energy Partners LLC - Upper Rock Island County Landfill | East Moline | IL | — | ◇ UNVERIFIED |
| UUps | Urbana | IL | — | ◇ UNVERIFIED |
| UPUpstate Pallets LLC | Rochester | NY | — | ◇ UNVERIFIED |
| U1Ursa 1 Stop | Ursa | IL | — | ◇ UNVERIFIED |
| UTUrsa Truck and Trailer Repair | Ursa | IL | — | ◇ UNVERIFIED |
| UIUrthpact Innovations Dba Urthpact West | Lincoln | CA | — | ◇ UNVERIFIED |
| URUSA Recycling & Excavation | Galesburg | IL | — | ◇ UNVERIFIED |
| URU.s.a. Recycling, INC. | Saint Louis | MO | — | ◇ UNVERIFIED |
| UAU.s. Army Corps of Engineers | Pine Bluff | AR | — | ◇ UNVERIFIED |
| UAUS Army Garrison West Point | West Point | NY | — | ◇ UNVERIFIED |
| UAUS Army National Guard at Midway Airport | Chicago | IL | — | ◇ UNVERIFIED |
| UWUSA Wood Concepts, Inc. | New Vineyard | ME | — | ◇ UNVERIFIED |
| UCU.S. Canvas & Awning Corp. | Houston | TX | — | ◇ UNVERIFIED |
| UDUS Doe Fermilab | Batavia | IL | — | ◇ UNVERIFIED |
| UDU.s. Doe Pinellas Plant | Largo | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Mount Orab | OH | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Cincinnati | OH | — | ◇ UNVERIFIED |
| UDU.s. Dol-osha Corpus Christi Area Office | Corpus Christi | TX | — | ◇ UNVERIFIED |
| UOUsdol Osha - Jacksonville | Jacksonville | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha Little Rock Ao | Rison | AR | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Creola | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Gilbertown | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Robertsdale | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | South Elgin | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Belvidere | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha - Raleigh Ao | Wilmington | NC | — | ◇ UNVERIFIED |
| UOUsdol - Osha Springfield Area Office | Holyoke | MA | — | ◇ UNVERIFIED |
| UOUsdol - Osha Springfield Area Office | Westfield | MA | — | ◇ UNVERIFIED |
| UOUsdol - Osha Springfield Area Office | Agawam | MA | — | ◇ UNVERIFIED |
| UOUsdol - Osha Springfield Area Office | Ashburnham | MA | — | ◇ UNVERIFIED |
| UPUsed Pallet CO | Fresno | CA | — | ◇ UNVERIFIED |
| UEU.s. Erosion Control Products, INC. | Pearson | GA | — | ◇ UNVERIFIED |
| UFUS Food Service INC | Glendale Heights | IL | — | ◇ UNVERIFIED |
| UFUS Forest Industries INC | South Fork | CO | — | ◇ UNVERIFIED |
| UGUS Gas of Burbank | Burbank | IL | — | ◇ UNVERIFIED |
| UCUsg CORP Research Center | Libertyville | IL | — | ◇ UNVERIFIED |
| USUsg Storage Site | Bremond | TX | — | ◇ UNVERIFIED |
| UGUS Gypsum CO | South Gate | CA | — | ◇ UNVERIFIED |
| UGUS Gypsum Company | Shoals | IN | — | ◇ UNVERIFIED |
| UGUS Gypsum Company - Denver Joint Plant | Denver | CO | — | ◇ UNVERIFIED |
| UGUS Gypsum Denver | Denver | CO | — | ◇ UNVERIFIED |
| UGUS Gypsum - Empire Plant | Empire | NV | — | ◇ UNVERIFIED |
| UHUS Hanger Company, LLC | Gardena | CA | — | ◇ UNVERIFIED |
| UHUS Hardwood Floors | South El Monte | CA | — | ◇ UNVERIFIED |
