| UFUnited Fabrication | Salt Lake City | UT | — | ◇ UNVERIFIED |
| UMUnited Metalcraft, INC. | Marietta | GA | — | ◇ UNVERIFIED |
| UMUnited Metal Services | Houston | TX | — | ◇ UNVERIFIED |
| UMUnited Millwright LLC | Mt Zion | IL | — | ◇ UNVERIFIED |
| UMUnited Millwright LLC | Mt Zion | IL | — | ◇ UNVERIFIED |
| UMUnited Misc & Ornamental Steel INC Dba Umo Steel INC | Union City | CA | — | ◇ UNVERIFIED |
| UPUnited Panel Corporation | Griffin | GA | — | ◇ UNVERIFIED |
| UPUnited Panel Corporation | Cartersville | GA | — | ◇ UNVERIFIED |
 United Plastic Fabricating, INC. | Ocala | FL | — | ◇ UNVERIFIED |
| USUnited Solutions | Sardis | MS | — | ◇ UNVERIFIED |
| USUnited States Marble | Remus | MI | — | ◇ UNVERIFIED |
| USUnited Steel Fabricators INC | Rialto | CA | — | ◇ UNVERIFIED |
| USUnited Steel, INC. | Wichita | KS | — | ◇ UNVERIFIED |
| USUnited Steel Products | Largo | FL | — | ◇ UNVERIFIED |
| USUnited Steel Products Company, INC. | Livermore | CA | — | ◇ UNVERIFIED |
| USUnited Steel Works, INC. | Clearwater | FL | — | ◇ UNVERIFIED |
| USUnited Steel Works, INC. | Clearwater | FL | — | ◇ UNVERIFIED |
| USUnited Structural Works, INC. | Congers | NY | — | ◇ UNVERIFIED |
| USUnited Structures of Georgia LLC | Cairo | GA | — | ◇ UNVERIFIED |
| USUnited Support Solutions INC. | Totowa | NJ | — | ◇ UNVERIFIED |
| UTUnited Team Mechanical, LLC | Kaysville | UT | — | ◇ UNVERIFIED |
| UTUnited Technologies Automotive Sys INC | Union City | IN | — | ◇ UNVERIFIED |
| UWUnited Weld Services, LLC | York | PA | — | ◇ UNVERIFIED |
| UPUnity Plastics | North Little Rock | AR | — | ◇ UNVERIFIED |
| USUnivar Solutions USA INC. | Providence | RI | — | ◇ UNVERIFIED |
| UDUniversal Dust Collector Mfg & Supply CORP Dba Udc Corporation | Anaheim | CA | — | ◇ UNVERIFIED |
| UEUniversal Enterprises, INC. | Shinnston | WV | — | ◇ UNVERIFIED |
| UFUniversal Fabricating & Construction Ser | Columbus | OH | — | ◇ UNVERIFIED |
| UFUniversal Fabricators INC | Madison Heights | MI | — | ◇ UNVERIFIED |
| UFUniversal Fabricators, LLC | Eglin Afb | FL | — | ◇ UNVERIFIED |
| UGUniversal Gates & Hardware INC | Midvale | UT | — | ◇ UNVERIFIED |
| UHUniversal Head CO INC | Joliet | IL | — | ◇ UNVERIFIED |
| UIUniversal Industries INC | Manor | TX | — | ◇ UNVERIFIED |
| UMUniversal Metal Hose Company | Chicago | IL | — | ◇ UNVERIFIED |
| UOUniversal Ornamental Iron, INC. | Conyers | GA | — | ◇ UNVERIFIED |
| UPUniversal Protective Packaging, INC. | Mechanicsburg | PA | — | ◇ UNVERIFIED |
| USUniversal Sheetmetal INC | Woodinville | WA | — | ◇ UNVERIFIED |
| USUniversal Steel Fabricators, INC. | Brooklyn | NY | — | ◇ UNVERIFIED |
| USUniversal Steel of North Carolina, LLC | Thomasville | NC | — | ◇ UNVERIFIED |
| USUniversal Synergetics INC | Marlton | NJ | — | ◇ UNVERIFIED |
| USUniversal Synergetics INC | Marlton | NJ | — | ◇ UNVERIFIED |
| UTUniversal Tool Steel LLC | Springfield | TN | — | ◇ UNVERIFIED |
| UIUni-Vue, Inc. | Troy | MI | — | ◇ UNVERIFIED |
| UMUniwall Mfg. CO. (1576111601) | Louisville | OH | — | ◇ UNVERIFIED |
| UIUnlimited Image INC | Burnsville | MN | — | ◇ UNVERIFIED |
| UIUnobtanium INC | Oregon City | OR | — | ◇ UNVERIFIED |
| USUpcycle Solutions, Inc. | Londonderry | NH | — | ◇ UNVERIFIED |
| UNUp North Industries LLC | Petoskey | MI | — | ◇ UNVERIFIED |
| UVUpper Valley Design LLC | Alstead | NH | — | ◇ UNVERIFIED |
| USUpright Steel Fabricators and Erectors LLC | Cleveland | OH | — | ◇ UNVERIFIED |
| UMUpson Metal Fabricators | San Jacinto | CA | — | ◇ UNVERIFIED |
| USUpton Sheet Metal, Inc. | Anaheim | CA | — | ◇ UNVERIFIED |
| UAUrbanovsky Advanced Construction, LLC | Cleburne | TX | — | ◇ UNVERIFIED |
| URU Recycle LLC | Salt Lake City | UT | — | ◇ UNVERIFIED |
| UMUSA Mold INC. | Newton | IA | — | ◇ UNVERIFIED |
| UPUSA Packaging LLC | Round Rock | TX | — | ◇ UNVERIFIED |
| UBU.s. Bridge | Cambridge | OH | — | ◇ UNVERIFIED |
| USU S Cast, Inc. | Elmer | NJ | — | ◇ UNVERIFIED |
| UCUS Chemical Storage Plant 2 | Wilkesboro | NC | — | ◇ UNVERIFIED |
| ULUscoe Louisville Repair Sta | Louisville | KY | — | ◇ UNVERIFIED |
| UDU.s. Defense National Stockpile Center Point Pleasant Depot | Point Pleasant | WV | — | ◇ UNVERIFIED |
| UDU.s. Dol Osha | York Haven | PA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Atlanta West Ao | Acworth | GA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Atlanta West Ao | Dalton | GA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Atlanta West Ao | Rossville | GA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Atlanta West Ao | Rome | GA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Atlanta West Ao | Marietta | GA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Atlanta West Ao | Mableton | GA | — | ◇ UNVERIFIED |
| UDUS Dol Osha Bridgeport | Madison | CT | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Springboro | OH | — | ◇ UNVERIFIED |
| UDU.s. Dol-osha Corpus Christi Area Office | Mcallen | TX | — | ◇ UNVERIFIED |
| UDU.s. Dol-osha Corpus Christi Area Office | Mcallen | TX | — | ◇ UNVERIFIED |
| UOUsdol Osha - Ft. Lauderdale Ao | Hialeah | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha - Ft. Lauderdale Ao | Homestead | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha - Ft. Lauderdale Ao | Hialeah | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha Little Rock Ao | Little Rock | AR | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Lafayette | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Elba | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Theodore | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Auburn | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Cowarts | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Mobile | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Clanton | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Saraland | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Auburn | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Geneva | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Carol Stream | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Lombard | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Kingston | IL | — | ◇ UNVERIFIED |
| UDUS Drainage Systems, LLC | Hickory | NC | — | ◇ UNVERIFIED |
| UUUsemco Universal Sanitary Equipment Mfg | Tomah | WI | — | ◇ UNVERIFIED |
| UFUS Farathane | Auburn Hills | MI | — | ◇ UNVERIFIED |
| UFUS Farathane | Utica | MI | — | ◇ UNVERIFIED |
| USU S Farathane Corporation | Lake Orion | MI | — | ◇ UNVERIFIED |
| UFUS Farathane Corporation | Jackson | TN | — | ◇ UNVERIFIED |
| UFUS Farathane Corporation - Utica Plant | Shelby Township | MI | — | ◇ UNVERIFIED |
| UFUS Farathane - Port Huron | Port Huron | MI | — | ◇ UNVERIFIED |
| UFUS Farathane - Puttygut | China Township | MI | — | ◇ UNVERIFIED |
| ULUS Lbm | Dyersville | IA | — | ◇ UNVERIFIED |
| ULUS Lbm Holdings, LLC | Telford | PA | — | ◇ UNVERIFIED |
