| UMUnited Metro Materials INC (dba Cemex Sacaton Plant) | Maricopa | AZ | — | ◇ UNVERIFIED |
| URUnited Ready Mix INC | Peoria | IL | — | ◇ UNVERIFIED |
| URUnited Ready Mix INC | Pekin | IL | — | ◇ UNVERIFIED |
| URUnited Ready Mix - Platteville | Platteville | CO | — | ◇ UNVERIFIED |
| URUnited Refinery Springdale Terminal | Springdale | PA | — | ◇ UNVERIFIED |
| URUnited Rentals Northwest, INC | Gilroy | CA | — | ◇ UNVERIFIED |
| USUnited Sand & Gravel, LLC | Frisco | TX | — | ◇ UNVERIFIED |
| UAUniversal Asphalt Company, INC. | Chino | CA | — | ◇ UNVERIFIED |
| UCUniversal Crushing | Punta Gorda | FL | — | ◇ UNVERIFIED |
| UPUniversal Precast Concrete, INC. | Redding | CA | — | ◇ UNVERIFIED |
| UPUniversal Precast, Inc. | Troy | AL | — | ◇ UNVERIFIED |
| UPUniversal Precast, Inc. | Pike County | AL | — | ◇ UNVERIFIED |
| UIUnke INC | Oakdale | CA | — | ◇ UNVERIFIED |
| UUnknown | Stockton | CA | — | ◇ UNVERIFIED |
| UUnknown | Miami | FL | — | ◇ UNVERIFIED |
| USUntamed Services - Mobile Concrete Crusher Unit | Shreveport | LA | — | ◇ UNVERIFIED |
| URUpchurch Ready Mix Concrete CO | East Saint Louis | IL | — | ◇ UNVERIFIED |
| URUpchurch Ready Mix Concrete CO INC | Belleville | IL | — | ◇ UNVERIFIED |
| UCUpper Cape Ready Mix | East Falmouth | MA | — | ◇ UNVERIFIED |
| UVUpper Valley Materials Progreso Plant | Progreso | TX | — | ◇ UNVERIFIED |
| UPUpstate Precast LLC | Pelzer | SC | — | ◇ UNVERIFIED |
| URUrbana Recycling CO | Urbana | IL | — | ◇ UNVERIFIED |
| UIU-rent INC. | Camarillo | CA | — | ◇ UNVERIFIED |
| UIU-rent INC. | Saticoy | CA | — | ◇ UNVERIFIED |
| UNUs301 Nice-middleton Bridge Replacement Project | Newburg | MD | — | ◇ UNVERIFIED |
| UEUs69 Express 135th Loop Ramp | Overland Park | KS | — | ◇ UNVERIFIED |
| UEUs69 Express Bvpw Batch Plant | Overland Park | KS | — | ◇ UNVERIFIED |
| UNUsace New River Chamber Batch Concrete Plt | Monaca | PA | — | ◇ UNVERIFIED |
| UCUSA Civil INC - Portable 53231 | Midlothian | VA | — | ◇ UNVERIFIED |
| UCUSA Civil INC - Portable 53239 | Chester | VA | — | ◇ UNVERIFIED |
| UCUSA Concrete LLC | La Grande | OR | — | ◇ UNVERIFIED |
| UFUsc - Ferrara Brothers LLC - Chelsea Road | Staten Island | NY | — | ◇ UNVERIFIED |
| UKUsc - Kings LLC - Inwood | Inwood | NY | — | ◇ UNVERIFIED |
| UKUsc - Kings LLC - on Time | Flushing | NY | — | ◇ UNVERIFIED |
| UCU.s. Concrete Company/superior Concrete Materials | Washington | DC | — | ◇ UNVERIFIED |
| UCU.s. Concrete, INC. | Staten Island | NY | — | ◇ UNVERIFIED |
| UCU.s. Concrete, INC. | Staten Island | NY | — | ◇ UNVERIFIED |
| UCUS Concrete On-site INC | Camp Grove | IL | — | ◇ UNVERIFIED |
| UCU.s. Concrete Products | Brooklyn | MD | — | ◇ UNVERIFIED |
| UOUsdol Osha | Alachua | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha - Atlanta West Ao | Hiram | GA | — | ◇ UNVERIFIED |
| UDU.s. Dol-osha Corpus Christi Area Office | San Juan | TX | — | ◇ UNVERIFIED |
| UDU.s. Dol-osha Corpus Christi Area Office | Harlingen | TX | — | ◇ UNVERIFIED |
| UOUsdol Osha - Ft. Lauderdale Ao | Miami | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha- Hasbrouck Heights | Lyndhurst | NJ | — | ◇ UNVERIFIED |
| UDU.s. Dol-osha Houston South Area Office | Galveston | TX | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Mobile | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Foley | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Theodore | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | South Beloit | IL | — | ◇ UNVERIFIED |
| UOUsdol - Osha Springfield Area Office | Oxford | MA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Tampa Ao | Orlando | FL | — | ◇ UNVERIFIED |
| UFUS Formliner, INC. | Comer | GA | — | ◇ UNVERIFIED |
| UGUS Gypsum CO | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| UHU.S. Heritage Group, Inc. | Franklin Park | IL | — | ◇ UNVERIFIED |
| UHU.S. Heritage Group, Inc. | Chicago | IL | — | ◇ UNVERIFIED |
| UIUS Intec, INC Dba Gaf | Stockton | CA | — | ◇ UNVERIFIED |
| UMUS Mix | Fontana | CA | — | ◇ UNVERIFIED |
| UPU.s. Polyco | Ennis | TX | — | ◇ UNVERIFIED |
| UPUsps Pacific Palisades | Pacific Palisades | CA | — | ◇ UNVERIFIED |
| USUsps Santa Ana | Santa Ana | CA | — | ◇ UNVERIFIED |
| UCUstone Cement Products & Solution LLC | Medley | FL | — | ◇ UNVERIFIED |
| USUtah Sealcoat Inc | Springville | UT | — | ◇ UNVERIFIED |
| UWUtah Wilbert Vault Company, INC | West Valley City | UT | — | ◇ UNVERIFIED |
| UTUtica Transit Mix and Supply | Sterling Heights | MI | — | ◇ UNVERIFIED |
| USUtilities Structures | Fort Myers | FL | — | ◇ UNVERIFIED |
| USUtilities Structures, INC. | Fort Myers | FL | — | ◇ UNVERIFIED |
| UCUtility Concrete Products | Plainfield | IL | — | ◇ UNVERIFIED |
| UCUtility Concrete Products LLC | Littlerock | CA | — | ◇ UNVERIFIED |
| UVUtility Vault Company | Santa Paula | CA | — | ◇ UNVERIFIED |
| UMUtopia Management | Inglewood | CA | — | ◇ UNVERIFIED |
| VAVaagen Asphalt and Paving INC 00064 | Portable | ID | — | ◇ UNVERIFIED |
| VCVa Cast Stone INC. | Waynesboro | VA | — | ◇ UNVERIFIED |
| VAVado Asphalt Plant | Las Cruces | NM | — | ◇ UNVERIFIED |
| VDValco Div-3 | Lamar | CO | — | ◇ UNVERIFIED |
| VIValco INC | Gunnison County | CO | — | ◇ UNVERIFIED |
| VIValco INC | Rocky Ford | CO | — | ◇ UNVERIFIED |
| VIValco INC | Canon City | CO | — | ◇ UNVERIFIED |
| VIValco INC | Rocky Ford | CO | — | ◇ UNVERIFIED |
| VIValco INC | Rocky Ford 2.0 Mi. E of | CO | — | ◇ UNVERIFIED |
| VIValco INC | Rocky Ford | CO | — | ◇ UNVERIFIED |
| VIValco, INC. (id #6790) | Otero County | CO | — | ◇ UNVERIFIED |
| VIValco INC Lamar Division | Las Animas | CO | — | ◇ UNVERIFIED |
| VLValcrete - Limon Plant | Limon | CO | — | ◇ UNVERIFIED |
| VBValente Builders, Inc. | Hudson Falls | NY | — | ◇ UNVERIFIED |
| VWValerie Wong | Thousand Oaks | CA | — | ◇ UNVERIFIED |
| VBValero Benicia Asphalt Plant | Benicia | CA | — | ◇ UNVERIFIED |
| VAValley Asphalt # 13 (1409000029) | Ross, Township of | OH | — | ◇ UNVERIFIED |
| VAValley Asphalt #14 (1431342852) | Newtown | OH | — | ◇ UNVERIFIED |
| VAValley Asphalt (1431400140) | Sharonville | OH | — | ◇ UNVERIFIED |
| VAValley Asphalt #17 - Portable | Cleves | OH | — | ◇ UNVERIFIED |
| VAValley Asphalt #18 - Portable | Wilmington | OH | — | ◇ UNVERIFIED |
| VAValley Asphalt #19 (1431073386) | Cincinnati | OH | — | ◇ UNVERIFIED |
| VAValley Asphalt #24 | Lucasville | OH | — | ◇ UNVERIFIED |
| VAValley Asphalt #25 (0855145005) | Troy | OH | — | ◇ UNVERIFIED |
| VAValley Asphalt #5 (1483110113) | — | OH | — | ◇ UNVERIFIED |
| VAValley Asphalt #6 (0857101899) | Dayton | OH | — | ◇ UNVERIFIED |
| VAValley Asphalt Corporation | Aurora | IN | — | ◇ UNVERIFIED |
| VAValley Asphalt Corporation #27 (0124010402) | Washington Court House | OH | — | ◇ UNVERIFIED |
| VAValley Asphalt CORP - Plant #11 (0829710020) | Xenia | OH | — | ◇ UNVERIFIED |