| UAUnibody Auto Collision | Chicago | IL | — | ◇ UNVERIFIED |
| USUnicat Services | Alvin | TX | — | ◇ UNVERIFIED |
| URUnicircuit - Roseville | Roseville | MN | — | ◇ UNVERIFIED |
| UIUnicontrol, INC. | Cleveland | OH | — | ◇ UNVERIFIED |
| UFUni Fab INC | East Saint Louis | IL | — | ◇ UNVERIFIED |
| UPUnified Power USA | Newark | CA | — | ◇ UNVERIFIED |
| UUnigen | Newark | CA | — | ◇ UNVERIFIED |
| UIUnigen INC | Fremont | CA | — | ◇ UNVERIFIED |
| UIUnimeasure INC | Corvallis | OR | — | ◇ 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 Pacific Railroad Company - Former Mp Shops | Sedalia | MO | — | ◇ UNVERIFIED |
| UPUnion Partners Upx CORP Dba Lamination Specialities CORP LLC | Chicago | IL | — | ◇ UNVERIFIED |
| URUnion Rubber INC | Trenton | NJ | — | ◇ UNVERIFIED |
| UUnipixel | Colorado Springs | CO | — | ◇ UNVERIFIED |
| UMUnique Marble | Vero Beach | FL | — | ◇ UNVERIFIED |
| UOUniroyal Optoelectronics INC | Tampa | FL | — | ◇ UNVERIFIED |
| UUnisil | Santa Clara | CA | — | ◇ UNVERIFIED |
| UAUnisil Acquisition CORP | Santa Clara | CA | — | ◇ UNVERIFIED |
| UAUnisil Aquisition CORP | Santa Clara | CA | — | ◇ UNVERIFIED |
| UCUnisil Corporation | Mountain View | CA | — | ◇ UNVERIFIED |
| UCUni-sim Corporation | Lisbon Falls | ME | — | ◇ UNVERIFIED |
| UEUnison Energy | San Jose | CA | — | ◇ UNVERIFIED |
| UTUnison Transformer Svcs INC | Kansas City | KS | — | ◇ 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 Blood Services California Dba Vitalant | San Luis Obispo | CA | — | ◇ UNVERIFIED |
| UBUnited Building Center | Breese | IL | — | ◇ UNVERIFIED |
| UCUnited Cartage INC | Hickory Hills | IL | — | ◇ UNVERIFIED |
| UDUnited Design Corp/noble Figurine Plt | Noble | OK | — | ◇ UNVERIFIED |
| UEUnited Elchem Industries | Dallas | TX | — | ◇ UNVERIFIED |
 United Electric Controls Precision Sensors Divisions | Milford | CT | — | ◇ UNVERIFIED |
| UEUnited Electronics CORP | Rosemont | IL | — | ◇ UNVERIFIED |
| UIUnited Innovative Solutions, Corp | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| UMUnited Microwave Products | Torrance | CA | — | ◇ UNVERIFIED |
| UPUnited Personnel Services, INC. | Whately | MA | — | ◇ UNVERIFIED |
 United Radio Frequency LLC | Fountain | CO | — | ◇ UNVERIFIED |
| URUnited Rentals | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| USUnited Science Industries | Dix | IL | — | ◇ UNVERIFIED |
| USUnited Science Industries INC | Okawville | IL | — | ◇ UNVERIFIED |
| USUnited Solar Ovonic | Auburn Hills | MI | — | ◇ UNVERIFIED |
| USUnited Sugars Producers & Refiners Cooperative-chicago | Chicago | IL | — | ◇ UNVERIFIED |
| USUnited Sun Energy INC. | Chico | CA | — | ◇ UNVERIFIED |
| UTUnited Technologies CORP Dba Carrier CORP | Indianapolis | IN | — | ◇ UNVERIFIED |
| UTUnited Technologies Electronic Controls | Huntington | IN | — | ◇ UNVERIFIED |
| UTUnited Testing Systems | Huntington Beach | CA | — | ◇ UNVERIFIED |
| UWUnited Wire Craft, INC. | Des Plaines | IL | — | ◇ UNVERIFIED |
| UUnitek | Fremont | CA | — | ◇ UNVERIFIED |
| UIUnitek, INC | Fremont | CA | — | ◇ UNVERIFIED |
| UIUnit Industries Group INC Ems | Fullerton | CA | — | ◇ UNVERIFIED |
| UPUnitrode Passive Components Di | Sun Valley | CA | — | ◇ UNVERIFIED |
| U5Unity 5 INC | Deerfield | IL | — | ◇ UNVERIFIED |
| USUnivar Solutions USA INC. | Carteret | NJ | — | ◇ UNVERIFIED |
| UDUniversal Dry Cleaners | Huntington Beach | CA | — | ◇ UNVERIFIED |
| UEUniversal Elec Bus | Canonsburg | PA | — | ◇ UNVERIFIED |
| UPUniversal Products | Brockton | MA | — | ◇ UNVERIFIED |
| USUniversal Sawmill | Bungay | IL | — | ◇ UNVERIFIED |
| USUniversal Semiconductor | San Jose | CA | — | ◇ UNVERIFIED |
| USUniversal Semiconductor Technology, INC | Santa Clara | CA | — | ◇ UNVERIFIED |
| UFUniversity Frames INC | Anaheim | CA | — | ◇ UNVERIFIED |
| UPUniversity Park Golo | University Park | IL | — | ◇ UNVERIFIED |
| USUniversity Service | Decatur | IL | — | ◇ UNVERIFIED |
| UOUnivision of Puerto Rico INC. | Guaynabo | PR | — | ◇ UNVERIFIED |
| UMUnparallel Media Group | Roselle Park | NJ | — | ◇ UNVERIFIED |
| URUpper Rock Energy Partners LLC - Upper Rock Island County Landfill | East Moline | IL | — | ◇ UNVERIFIED |
| UUps | Urbana | IL | — | ◇ UNVERIFIED |
| UPUpstart Power INC | Southborough | MA | — | ◇ UNVERIFIED |
| UEUpstate Electrical Technologies Acquisition Corp. | Avon | NY | — | ◇ UNVERIFIED |
| UEUpstate Electrical Technologies Acquisition Corp. | Fairport | NY | — | ◇ UNVERIFIED |
| UPUpstate Printed Circuits INC | Syracuse | NY | — | ◇ UNVERIFIED |
| UOUrban Oil & Gas Group Starveacre 4 | Mccalla | AL | — | ◇ UNVERIFIED |
| USUriel Solar INC | Westlake Village | CA | — | ◇ UNVERIFIED |
| ULUrologix LLC | Minneapolis | MN | — | ◇ 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 |
| UAU.s. Army Corps of Engineers | Pine Bluff | AR | — | ◇ UNVERIFIED |
| UAUS Army National Guard at Midway Airport | Chicago | IL | — | ◇ UNVERIFIED |
| UVUSA Vision Systems INC | Irvine | CA | — | ◇ UNVERIFIED |
| UBUS Bank | Saint Paul | MN | — | ◇ UNVERIFIED |
| UCU.S. Canvas & Awning Corp. | Houston | TX | — | ◇ UNVERIFIED |
| UBUscg Base Kodiak Commdet | Kodiak | AK | — | ◇ UNVERIFIED |
| UCUS Coast Guard Sta Alexandria Bay | Fineview | NY | — | ◇ UNVERIFIED |
| UCU.S. Controls, Inc. | Ontario | CA | — | ◇ UNVERIFIED |
| UCU.S. Controls, Inc. | Ontario | CA | — | ◇ UNVERIFIED |
| UDU.s. Department of Defense | Fort George G Meade | MD | — | ◇ UNVERIFIED |
| UDUS Doe Fermilab | Batavia | IL | — | ◇ UNVERIFIED |
| UDU.s. Doe Pinellas Plant | Largo | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Lynchburg | OH | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Lostant | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Polo | IL | — | ◇ UNVERIFIED |
| UOUsdol - Osha Springfield Area Office | Ashburnham | MA | — | ◇ UNVERIFIED |
| UOUsdol - Osha Springfield Area Office | Holyoke | MA | — | ◇ UNVERIFIED |
