| USUniversal Steel Services, INC. | San Bernardino | CA | — | ◇ UNVERIFIED |
| USUniversal Studios Properties | Universal City | CA | — | ◇ UNVERIFIED |
| UTUniversal Tool Inc. | Troy | MI | — | ◇ UNVERIFIED |
| UTUniversal Tool, INC. | Rainbow City | AL | — | ◇ UNVERIFIED |
| UTUniversal Tower Parts, LLC | Phoenix | AZ | — | ◇ UNVERIFIED |
| UTUniversal Truck Equipments LLC | Medley | FL | — | ◇ UNVERIFIED |
| UWUniversal Welding & Fabrication INC. | North Pole | AK | — | ◇ UNVERIFIED |
| UOUniversity of South Florida (usf) | Tampa | FL | — | ◇ UNVERIFIED |
| UPUniversity Park Real Estate LLC | Posen | IL | — | ◇ UNVERIFIED |
| UCUnivex CORP | Salem | NH | — | ◇ UNVERIFIED |
| UUnknown | Norfolk | VA | — | ◇ UNVERIFIED |
| UUnknown | Topeka | KS | — | ◇ UNVERIFIED |
| UIUnlimited Image INC | Burnsville | MN | — | ◇ UNVERIFIED |
| UIUnlimited Industrial Services, LLC | Belle Glade | FL | — | ◇ UNVERIFIED |
| UIUnova Ind Automation/landis Gardner Div | Waynesboro | PA | — | ◇ UNVERIFIED |
| UMUnverferth Manufacturing Company, INC - Lexington Division - South Facility | Lexington | NE | — | ◇ UNVERIFIED |
| UMUnverferth Mfg CO INC | Kalida | OH | — | ◇ UNVERIFIED |
| UIUnytite INC | Peru | IL | — | ◇ UNVERIFIED |
| UMUpchurch Machine Co., INC. | Charlotte | NC | — | ◇ UNVERIFIED |
| UIUpco INC | Claremore | OK | — | ◇ UNVERIFIED |
| USUpcycle Solutions, Inc. | Londonderry | NH | — | ◇ UNVERIFIED |
| UFUp Fabricating CO INC | Manistique | MI | — | ◇ UNVERIFIED |
| UEUplift Elevator CORP. | Long Island City | NY | — | ◇ UNVERIFIED |
| USUpmc St Margaret Hosp/pgh | Pittsburgh | PA | — | ◇ UNVERIFIED |
| UEUpper Edge Solutions, LLC | Holland | NY | — | ◇ UNVERIFIED |
| UUps | Wyoming | MI | — | ◇ UNVERIFIED |
| USUpton Sheet Metal, Inc. | Anaheim | CA | — | ◇ UNVERIFIED |
| UIUpturn Industries, INC. | Bainbridge | NY | — | ◇ UNVERIFIED |
| UEUrania Engineering Company, INC. | Hazleton | PA | — | ◇ UNVERIFIED |
| UEUrban Elevator | Brentwood | CA | — | ◇ UNVERIFIED |
| UOUrban Oil & Gas Group Starveacre 4 | Mccalla | AL | — | ◇ UNVERIFIED |
| UTUrgent Tool and Machine, LLC | Coopersville | MI | — | ◇ UNVERIFIED |
| ULUrologix LLC | Minneapolis | MN | — | ◇ UNVERIFIED |
 Urschel Laboratories, INC. | Valparaiso | IN | — | ◇ UNVERIFIED |
| UAUS Air Filtration INC | Temecula | CA | — | ◇ UNVERIFIED |
| UAUS Applied Mechanics | Tarpon Springs | FL | — | ◇ UNVERIFIED |
| UAUS Arkray INC | Doral | FL | — | ◇ UNVERIFIED |
| UAU.s. Army Longhorn Army Ammunition Plant | Karnack | TX | — | ◇ UNVERIFIED |
| UAUS Army Sunflower Ammunition Plant | De Soto | KS | — | ◇ UNVERIFIED |
| ULUsaroboticmachiine LLC | Eaton Rapids | MI | — | ◇ UNVERIFIED |
| UTUSA Today National Rack Center | Murfreesboro | TN | — | ◇ UNVERIFIED |
| UBUS Blades Sub LLC | Florence | SC | — | ◇ UNVERIFIED |
| USU. S. Boiler & Tube Company, INC. | Fort Payne | AL | — | ◇ UNVERIFIED |
| UCUS Car Tool, LLC | Graham | NC | — | ◇ UNVERIFIED |
| UIU.s.c.g. Isc San Pedro | San Pedro | CA | — | ◇ UNVERIFIED |
| UCUS Chemical Storage Plant 2 | Wilkesboro | NC | — | ◇ UNVERIFIED |
| UCU.s. Chutes Corporation | Bantam | CT | — | ◇ UNVERIFIED |
| UCUS Coast Guard Air Station | San Diego | CA | — | ◇ UNVERIFIED |
| UCUS Coast Guard Station, Kodiak | Kodiak | AK | — | ◇ UNVERIFIED |
| UCUS Conveyor Technologies | Mackinaw | IL | — | ◇ UNVERIFIED |
| UDU.s. Department of the Treasury - U.s. Mint | San Francisco | CA | — | ◇ UNVERIFIED |
| UKUsdoe Kansas City National Security Campus | Kansas City | MO | — | ◇ UNVERIFIED |
| UKUsdoe Kansas City National Security Campus Building 23 | Kansas City | MO | — | ◇ UNVERIFIED |
| UUsdol | Lubbock | TX | — | ◇ UNVERIFIED |
| UDU.s. Dol Osha | York | PA | — | ◇ UNVERIFIED |
| UDU.s. Dol Osha | Chambersburg | PA | — | ◇ UNVERIFIED |
| UDU.s. Dol Osha | York Haven | PA | — | ◇ UNVERIFIED |
| UOUsdol Osha | Berthold | ND | — | ◇ UNVERIFIED |
| UOUsdol Osha - Andover | Amesbury | MA | — | ◇ UNVERIFIED |
| UWUsdol-osha-atlanta West | Mableton | GA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Atlanta West Ao | Marietta | GA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Atlanta West Ao | Dalton | GA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Atlanta West Ao | Rome | GA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Atlanta West Ao | Rossville | GA | — | ◇ UNVERIFIED |
| UDUS Dol Osha Bridgeport | Madison | CT | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Lebanon | OH | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Troy | OH | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Harrison | OH | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Cincinnati | OH | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Xenia | OH | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Fairfield | OH | — | ◇ UNVERIFIED |
| UOUsdol Osha - Cincinnati Area Office | Fairfield | OH | — | ◇ UNVERIFIED |
| UOUsdol Osha - Concord Area Office | Keene | NH | — | ◇ UNVERIFIED |
| UDU.s. Dol-osha Corpus Christi Area Office | Mcallen | TX | — | ◇ UNVERIFIED |
| UDU.s. Dol-osha Corpus Christi Area Office | Victoria | TX | — | ◇ UNVERIFIED |
| UDU.s. Dol-osha Corpus Christi Area Office | Corpus Christi | TX | — | ◇ UNVERIFIED |
| UOUsdol Osha - Ft. Lauderdale Ao | Homestead | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha - Ft. Lauderdale Ao | Hialeah | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha- Hasbrouck Heights | Carlstadt | NJ | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Geneva | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Mobile | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Theodore | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Bensenville | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Woodridge | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Richmond | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Sterling | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Savanna | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Lombard | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Streator | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Rockford | IL | — | ◇ UNVERIFIED |
| UOUsdol - Osha Springfield Area Office | — | MA | — | ◇ UNVERIFIED |
| UOUsdol Osha - St. Louis Area Office | Maryland Heights | MO | — | ◇ UNVERIFIED |
| UDUS Duct, INC. | Kernersville | NC | — | ◇ UNVERIFIED |
| UUUsemco Universal Sanitary Equipment Mfg | Tomah | WI | — | ◇ UNVERIFIED |
| UEUS Endoscopy | Mentor | OH | — | ◇ UNVERIFIED |
| UFUS Fabrications | Hayward | CA | — | ◇ UNVERIFIED |
| USU S Farm Systems | Tulare | CA | — | ◇ UNVERIFIED |
| UFUS Farm Systems | Tracy | CA | — | ◇ UNVERIFIED |
| UHU.s. Horizon Manufacturing INC | Valencia | CA | — | ◇ UNVERIFIED |
| UMUS Mat Systems LLC | Mcminnville | OR | — | ◇ UNVERIFIED |
