| TJTuxedo Junction 2 | Chicago | IL | — | ◇ UNVERIFIED |
| TTTwenty/twenty Therapeutics | South San Francisco | CA | — | ◇ UNVERIFIED |
| TCTwin Cities Anaplastology L.L.C. | Saint Paul | MN | — | ◇ UNVERIFIED |
| TCTwin City Chromium Plating Company | Minneapolis | MN | — | ◇ UNVERIFIED |
| TCTwin City Optical CO INC | Plymouth | MN | — | ◇ UNVERIFIED |
| TCTwin City Wood Recycling | Bloomington | IL | — | ◇ UNVERIFIED |
| TFTwin Frame & Body Repair | River Grove | IL | — | ◇ UNVERIFIED |
| TMTwin Med, LLC | Niles | IL | — | ◇ UNVERIFIED |
| TRTwo Rivers Fs INC | Ipava | IL | — | ◇ UNVERIFIED |
| TRTwo Rivers Fs INC | Rushville | IL | — | ◇ UNVERIFIED |
| TSTwr Service CORP | Schaumburg | IL | — | ◇ UNVERIFIED |
| TETyco Electronic Component Mfg Carlisle Plt | Carlisle | PA | — | ◇ UNVERIFIED |
| TETyco Electronics | Rochester | NY | — | ◇ UNVERIFIED |
| TETyco Electronics CORP | Harrisonburg | VA | — | ◇ UNVERIFIED |
| TETyco Electronics CORP Bldg 067 | Winston Salem | NC | — | ◇ UNVERIFIED |
| TJTylers Jefferson Motors INC | Mount Vernon | IL | — | ◇ UNVERIFIED |
| UPUc Paving INC | Troy Grove | IL | — | ◇ UNVERIFIED |
| UIUcs INC. | Lincolnton | NC | — | ◇ UNVERIFIED |
 Uct Coatings INC | Stuart | FL | — | ◇ UNVERIFIED |
| UCU.e. Compression | Commerce City | CO | — | ◇ UNVERIFIED |
| UTUic Transportation Garage | Chicago | IL | — | ◇ UNVERIFIED |
| ULUl LLC | San Jose | CA | — | ◇ UNVERIFIED |
| USUlrich Standard | Metamora | IL | — | ◇ UNVERIFIED |
| UCUltimate Collision Repair INC | Schaumburg | IL | — | ◇ UNVERIFIED |
| UCUltra Coatings, Incorporated | High Point | NC | — | ◇ UNVERIFIED |
| UEUltralite Enterprises Inc | Lawrenceville | GA | — | ◇ UNVERIFIED |
| UPUltra Plating CORP | Green Bay | WI | — | ◇ UNVERIFIED |
| UPUncle Phil, LLC | Los Angeles | CA | — | ◇ UNVERIFIED |
| UAUnibody Auto Collision | Chicago | IL | — | ◇ UNVERIFIED |
| UMUnico Mechanical Corporation | Benicia | CA | — | ◇ UNVERIFIED |
| USUnico Services INC | Benicia | CA | — | ◇ 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 Partners Upx CORP Dba Lamination Specialities CORP LLC | Chicago | IL | — | ◇ UNVERIFIED |
| UMUnique Marble | Vero Beach | FL | — | ◇ UNVERIFIED |
| UPUnique Plating Company | Johnston | RI | — | ◇ UNVERIFIED |
| UCUni-sim Corporation | Lisbon Falls | ME | — | ◇ UNVERIFIED |
| UIUnitech Industries INC | Des Plaines | IL | — | ◇ 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 |
| UBUnited Bumper Inc-united Bumper INC | Saint Louis | MO | — | ◇ UNVERIFIED |
| UCUnited Cartage INC | Hickory Hills | IL | — | ◇ UNVERIFIED |
| UCUnited Coatings INC | Sedro Woolley | WA | — | ◇ UNVERIFIED |
| UEUnited Engraving Incorporated | Statesville | NC | — | ◇ UNVERIFIED |
| UMUnited Metal Finishers | Chicago | IL | — | ◇ UNVERIFIED |
| UMUnited Metal Finishing INC. | Greensboro | NC | — | ◇ UNVERIFIED |
| UMUnited Metal Finishing, INC. of Greensboro | Greensboro | NC | — | ◇ UNVERIFIED |
| UOUnited Ocular, LLC | Midvale | UT | — | ◇ 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 |
| USUnited Sugars Producers & Refiners Cooperative-chicago | Chicago | IL | — | ◇ UNVERIFIED |
| UWUnited Wire Craft, INC. | Des Plaines | IL | — | ◇ UNVERIFIED |
| U5Unity 5 INC | Deerfield | IL | — | ◇ UNVERIFIED |
| ULUnity Lab Services | Pasadena | CA | — | ◇ UNVERIFIED |
| UPUnity Prosthetics and Orthotics Inc. | Daytona Beach | FL | — | ◇ UNVERIFIED |
| USUnivar Solutions USA INC. | Carteret | NJ | — | ◇ UNVERIFIED |
| UCUniversal Cyclops Specialty Steel Div | Titusville | PA | — | ◇ UNVERIFIED |
| UFUniversal Fixture CORP | Brooklyn | NY | — | ◇ UNVERIFIED |
| UMUniversal Metal Plating | Azusa | CA | — | ◇ UNVERIFIED |
| USUniversal Sawmill | Bungay | IL | — | ◇ UNVERIFIED |
| UFUniversity Frames INC | Anaheim | CA | — | ◇ UNVERIFIED |
| UOUniversity of Michigan Orthotics & Prosthetics Center | Ann Arbor | MI | — | ◇ UNVERIFIED |
| UPUniversity Park Golo | University Park | IL | — | ◇ UNVERIFIED |
| USUniversity Service | Decatur | IL | — | ◇ UNVERIFIED |
| ULUny LLC | East Syracuse | NY | — | ◇ UNVERIFIED |
| URUpper Rock Energy Partners LLC - Upper Rock Island County Landfill | East Moline | IL | — | ◇ UNVERIFIED |
| UUps | Urbana | IL | — | ◇ UNVERIFIED |
| UAUpstate Anodize LLC | Gaffney | SC | — | ◇ UNVERIFIED |
| U1Ursa 1 Stop | Ursa | IL | — | ◇ UNVERIFIED |
| UTUrsa Truck and Trailer Repair | Ursa | IL | — | ◇ UNVERIFIED |
| UIUrthpact Innovations Dba Urthpact West | Lincoln | CA | — | ◇ UNVERIFIED |
| UMUSA Medical Supply | Hollywood | FL | — | ◇ 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 |
| UAUS Auto Radiator Manufacturing CORP | Highland Park | MI | — | ◇ UNVERIFIED |
| UCU.S. Canvas & Awning Corp. | Houston | TX | — | ◇ UNVERIFIED |
| UCUS Chrome CORP of Pennsylvania | Norristown | PA | — | ◇ UNVERIFIED |
| UCUS Cotton | Rio Rancho | NM | — | ◇ UNVERIFIED |
| UCU.s. Cotton, LLC | Charlotte | NC | — | ◇ UNVERIFIED |
| UCUS Cotton Supply LLC | Rio Rancho | NM | — | ◇ UNVERIFIED |
| UDUS Doe Fermilab | Batavia | IL | — | ◇ UNVERIFIED |
| UDU.s. Doe Pinellas Plant | Largo | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha - Andover | Waltham | MA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Andover | North Andover | MA | — | ◇ UNVERIFIED |
| UOUsdol Osha-atlanta West | Atlanta | GA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Dayton | OH | — | ◇ UNVERIFIED |
| UOUsdol Osha - Hartford Area Office | East Hartford | CT | — | ◇ UNVERIFIED |
| UOUsdol Osha - Hartford Area Office | Putnam | CT | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Kingston | IL | — | ◇ UNVERIFIED |
