| UCUnion County State Pond Water Plant | Jonesboro | IL | — | ◇ UNVERIFIED |
| UMUnion Metal - Canton | Canton | OH | — | ◇ UNVERIFIED |
| UPUnion Pacific Railroad | Chicago | IL | — | ◇ UNVERIFIED |
| UPUnion Partners Upx CORP Dba Lamination Specialities CORP LLC | Chicago | IL | — | ◇ UNVERIFIED |
| URUnion Roto-graving, INC. | Putnam | CT | — | ◇ UNVERIFIED |
| UTUnion Tank Car Company | East Chicago | IN | — | ◇ UNVERIFIED |
| UUnipres | Steele | AL | — | ◇ UNVERIFIED |
| UIUnison Industries LLC Plant 2 | Dayton | OH | — | ◇ UNVERIFIED |
| UPUnitech Prepress Solutions INC | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| UAUnited Airlines Ahnoc | Arlington Heights | IL | — | ◇ UNVERIFIED |
| UBUnited Bumper Inc-united Bumper INC | Saint Louis | MO | — | ◇ UNVERIFIED |
| UEUnited Engine & Machine Company | Carson City | NV | — | ◇ UNVERIFIED |
| UEUnited Engravers INC | Schaumburg | IL | — | ◇ UNVERIFIED |
| UEUnited Engraving Incorporated | Statesville | NC | — | ◇ UNVERIFIED |
| UFUnited Fabrication | Salt Lake City | UT | — | ◇ UNVERIFIED |
 United Fiberglass of America INC (0812100565) | Springfield | OH | — | ◇ UNVERIFIED |
| UMUnited Machining INC | Macomb | MI | — | ◇ UNVERIFIED |
| UMUnited Metal Finishers | Chicago | IL | — | ◇ UNVERIFIED |
| UMUnited Metal Finishing, INC. of Greensboro | Greensboro | NC | — | ◇ UNVERIFIED |
| UPUnited Parcel Service | Quincy | IL | — | ◇ UNVERIFIED |
| UPUnited Parcel Service | Olney | IL | — | ◇ UNVERIFIED |
| UPUnited Parcel Service | Rock Falls | IL | — | ◇ UNVERIFIED |
| UPUnited Parcel Service - Dekalb | Dekalb | IL | — | ◇ UNVERIFIED |
| UPUnited Parcel Service, INC. | Kankakee | IL | — | ◇ UNVERIFIED |
| USUnited Science Industries INC | Okawville | IL | — | ◇ UNVERIFIED |
| USUnited Solar Ovonic | Auburn Hills | MI | — | ◇ UNVERIFIED |
| USUnited States Spray Finishing CO INC | Newark | NJ | — | ◇ UNVERIFIED |
| USUnited Steel Works, INC. | Clearwater | FL | — | ◇ UNVERIFIED |
| UCUniversal Coating INC | Mount Morris | MI | — | ◇ UNVERIFIED |
| UCUniversal Coatings Corporation | Henry | TN | — | ◇ UNVERIFIED |
| UCUniversal Coatings INC | Steger | IL | — | ◇ UNVERIFIED |
| UCUniversal Compression INC | Tulsa | OK | — | ◇ UNVERIFIED |
| UCUniversal Cyclops Specialty Steel Div | Titusville | PA | — | ◇ UNVERIFIED |
| UDUniversal Dynamics | Woodbridge | VA | — | ◇ UNVERIFIED |
| UEUniversal Engineering Corporation | Cedar Rapids | IA | — | ◇ UNVERIFIED |
| UFUniversal Fabricating & Construction Ser | Columbus | OH | — | ◇ UNVERIFIED |
| UFUniversal Fixture CORP | Brooklyn | NY | — | ◇ UNVERIFIED |
| UGUniversal Galvinizing INC | Saint Peters | MO | — | ◇ UNVERIFIED |
| UMUniversal Marine & Industrial Services | Mobile | AL | — | ◇ UNVERIFIED |
| UMUniversal Metal Plating | Azusa | CA | — | ◇ UNVERIFIED |
| UPUniversal Plating | Morganfield | KY | — | ◇ UNVERIFIED |
| UPUniversal Plating Company, INC. | Providence | RI | — | ◇ UNVERIFIED |
| UPUniversal Plating, INC. | Akron | OH | — | ◇ UNVERIFIED |
| URUniversal Rack & Equipment Co., INC | Twinsburg | OH | — | ◇ UNVERIFIED |
| USUniversal Sandblasting & Painting INC. | Lanark | WV | — | ◇ UNVERIFIED |
| USUniversal Sheetmetal INC | Woodinville | WA | — | ◇ UNVERIFIED |
| UTUniversal Tool & Engineering | Indianapolis | IN | — | ◇ UNVERIFIED |
| UTUniversal Trailer Corporation Cargo Group Bristol | Bristol | IN | — | ◇ UNVERIFIED |
| UPUniversity Plating CO | San Jose | CA | — | ◇ UNVERIFIED |
| UUnknown | Topeka | KS | — | ◇ UNVERIFIED |
| UGUnlimited Glassworks INC | Titusville | FL | — | ◇ UNVERIFIED |
| UUno-ven | Norridge | IL | — | ◇ UNVERIFIED |
| UFUnruh Fab, INC. | Sedgwick | KS | — | ◇ UNVERIFIED |
| UIUpco INC | Claremore | OK | — | ◇ UNVERIFIED |
| UIUpf INC. | Flint | MI | — | ◇ UNVERIFIED |
| UNUp North Industries LLC | Petoskey | MI | — | ◇ UNVERIFIED |
| UIUpper Iowa University - Peacock Arts & Athletics Center | Fayette | IA | — | ◇ UNVERIFIED |
| UPUpper Peninsula Machine & Engineering CO | Powers | MI | — | ◇ UNVERIFIED |
| UDUrgent Design and Mfg INC | Lapeer | MI | — | ◇ UNVERIFIED |
| UNUsaf Norton Air Force Base | San Bernardino | CA | — | ◇ UNVERIFIED |
| UNUsag Natick Ssc | Natick | MA | — | ◇ UNVERIFIED |
| UTUSA Today National Rack Center | Murfreesboro | TN | — | ◇ UNVERIFIED |
| UAUS Auto Radiator Manufacturing CORP | Highland Park | MI | — | ◇ UNVERIFIED |
| UBUS Bottlers Machinery CO | Charlotte | NC | — | ◇ UNVERIFIED |
| UCUS Casting | Canton | OH | — | ◇ UNVERIFIED |
| UCUS Castings LLC | Entiat | WA | — | ◇ UNVERIFIED |
| UIU.s.c.g. Isc San Pedro | San Pedro | CA | — | ◇ UNVERIFIED |
| UCUS Chemical Storage Plant 2 | Wilkesboro | NC | — | ◇ UNVERIFIED |
| UCUS Chrome CORP of Pennsylvania | Norristown | PA | — | ◇ UNVERIFIED |
| UCUS Coast Guard Charleston | Charleston | SC | — | ◇ UNVERIFIED |
| UCUS Coast Guard-floyd Bennett Field | Brooklyn | NY | — | ◇ UNVERIFIED |
| UCUS Coast Guard S. Weymouth Buoy Depot | Weymouth (south Weymouth) | MA | — | ◇ UNVERIFIED |
| ULUscoe Louisville Repair Sta | Louisville | KY | — | ◇ UNVERIFIED |
| UDU.s. Defense National Stockpile Center Point Pleasant Depot | Point Pleasant | WV | — | ◇ UNVERIFIED |
| UDU.s. Dept of Energy - Rfets | Arvada | CO | — | ◇ UNVERIFIED |
| UDU.s. Doe Central Training Facility | Kingston | TN | — | ◇ UNVERIFIED |
| UKUsdoe Kansas City National Security Campus | Kansas City | MO | — | ◇ UNVERIFIED |
| UKUsdoe Kansas City National Security Campus (kcnsc) Nm Operations (nmo) | Albuquerque | NM | — | ◇ UNVERIFIED |
| UDUS Doi Ft Simcoe Job CORP Ctr | White Swan | WA | — | ◇ UNVERIFIED |
| UEUS Elastomer | Marietta | GA | — | ◇ UNVERIFIED |
| USU S Farathane CORP | Utica | MI | — | ◇ UNVERIFIED |
| UFUS Food Service INC | Glendale Heights | IL | — | ◇ UNVERIFIED |
| USU S Forgecraft CORP. | Fort Smith | AR | — | ◇ UNVERIFIED |
| ULUS Lock & Hdwr Co/columbia | Columbia | PA | — | ◇ UNVERIFIED |
| UMUS Machine INC | Fairmont | WV | — | ◇ UNVERIFIED |
| UMU.s. Marine | Navassa | NC | — | ◇ UNVERIFIED |
| UMUS Marine Bayliner Marine | Arlington | WA | — | ◇ UNVERIFIED |
| UMUS Marine CORP | Pipestone | MN | — | ◇ UNVERIFIED |
| UMU.s. Marine - Cumberland I | Cumberland | MD | — | ◇ UNVERIFIED |
| UMUS Marine INC - Frp Boats Facility | New Orleans | LA | — | ◇ UNVERIFIED |
| UMU.s. Marine - Salisbury | Salisbury | MD | — | ◇ UNVERIFIED |
| UNUS Naval Weapons Station Yorktown - Cheatham Annex | Yorktown | VA | — | ◇ UNVERIFIED |
| UWUsnr Woodland Division | Woodland | WA | — | ◇ UNVERIFIED |
| UMUsona Metal Finishing LLC | Saint Louis | MO | — | ◇ UNVERIFIED |
| UPU.s. Pipe Fabrication | Olivehurst | CA | — | ◇ UNVERIFIED |
| UPUS Pipe Fabrication | Orlando | FL | — | ◇ UNVERIFIED |
| UPU.s. Pipe Fabrication, LLC | Orlando | FL | — | ◇ UNVERIFIED |
| USU S Pipe & Foundry Company INC | Burlington Township | NJ | — | ◇ UNVERIFIED |
| UPUS Prefinished Metals | Los Angeles | CA | — | ◇ UNVERIFIED |
| USUsp Structural Connectors | Montgomery | MN | — | ◇ UNVERIFIED |
