| UTUltra Tool Company LLC | Howell | MI | — | ◇ UNVERIFIED |
| UPUncle Phil, LLC | Los Angeles | CA | — | ◇ UNVERIFIED |
| UUUncommon USA INC | Willmar | MN | — | ◇ UNVERIFIED |
| UIUndercover, Inc. | Chattanooga | TN | — | ◇ UNVERIFIED |
| UPUnder Pressure Systems LLC | New Philadelphia | OH | — | ◇ UNVERIFIED |
| UAUnibody Auto Collision | Chicago | IL | — | ◇ UNVERIFIED |
| UCUnicel CORP | Escondido | CA | — | ◇ UNVERIFIED |
| UCUnifab Corporation | Kalamazoo | MI | — | ◇ UNVERIFIED |
| UFUni Fab INC | East Saint Louis | IL | — | ◇ UNVERIFIED |
| UIUni-fab Industries INC | Fremont | CA | — | ◇ UNVERIFIED |
| UEUnified Equipment Systems INC | Clinton Township | MI | — | ◇ UNVERIFIED |
| UMUnified Manufacturing INC | Valencia | CA | — | ◇ UNVERIFIED |
| UMUnified Merchandising LLC | Hardeeville | SC | — | ◇ UNVERIFIED |
| UIUnimatic INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| UIUnimatic INC | Saint Louis Park | MN | — | ◇ UNVERIFIED |
| U7Union 76 | Oak Park | IL | — | ◇ UNVERIFIED |
| U7Union 76 Car Wash | Chicago | IL | — | ◇ UNVERIFIED |
| UBUnion Business Center | Cheektowaga | NY | — | ◇ UNVERIFIED |
| UCUnion Corrugating | Ocala | FL | — | ◇ 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 |
| UTUnion Tank Car Company | East Chicago | IN | — | ◇ UNVERIFIED |
| UTUnion Tank Car CO - Valdosta Facility | Valdosta | GA | — | ◇ UNVERIFIED |
| UOUniparts Olsen, INC. | — | IA | — | ◇ UNVERIFIED |
| UGUnique Garage Door Inc. | Las Vegas | NV | — | ◇ UNVERIFIED |
| UMUnique Machine & Tool | Mc Kees Rocks | PA | — | ◇ UNVERIFIED |
| UMUnique Marble | Vero Beach | FL | — | ◇ UNVERIFIED |
| UMUnique Metal Fabrication INC | Phoenix | AZ | — | ◇ UNVERIFIED |
| UMUnique Metal Products LLC | Eugene | OR | — | ◇ UNVERIFIED |
| USUnique Signs USA | Las Vegas | NV | — | ◇ UNVERIFIED |
| UCUni-sim Corporation | Lisbon Falls | ME | — | ◇ UNVERIFIED |
| UIUnison Industries LLC Plant 2 | Dayton | OH | — | ◇ UNVERIFIED |
| ULUnitech Lc | Salt Lake City | UT | — | ◇ UNVERIFIED |
| UAUnited Airlines Ahnoc | Arlington Heights | IL | — | ◇ UNVERIFIED |
| UAUnited Airlines, INC. | Newark | NJ | — | ◇ UNVERIFIED |
| UBUnited Bark Products | Orland | CA | — | ◇ UNVERIFIED |
| UBUnited Best Sheet Metal | Arcadia | CA | — | ◇ UNVERIFIED |
| UBUnited Biologics INC | Santa Ana | CA | — | ◇ UNVERIFIED |
| UBUnited Biologics INC | Irvine | CA | — | ◇ UNVERIFIED |
| UBUnited Building Center | Breese | IL | — | ◇ UNVERIFIED |
| UCUnited Cartage INC | Hickory Hills | IL | — | ◇ UNVERIFIED |
| UFUnited Fabrication | Salt Lake City | UT | — | ◇ UNVERIFIED |
| UIUnited Industries, INC. | Odessa | TX | — | ◇ UNVERIFIED |
| UIUnited Ink Enterprises LTD | Belleville | IL | — | ◇ UNVERIFIED |
| ULUnited Lighting Standards, INC. | Warren | MI | — | ◇ UNVERIFIED |
| UMUnited Machining, Inc | Sutton | MA | — | ◇ UNVERIFIED |
| UMUnited Machining, INC. | Englewood | CO | — | ◇ UNVERIFIED |
| UMUnited Mechanical & Metal Fabricators, Inc. | Union City | CA | — | ◇ UNVERIFIED |
| UMUnited Metal Services | Houston | TX | — | ◇ UNVERIFIED |
| UMUnited Misc. & Ornamental Steel, Inc. | Union City | CA | — | ◇ UNVERIFIED |
| UPUnited Partition Systems Inc | Ontario | CA | — | ◇ UNVERIFIED |
| UPUnited Performance Metals | La Mirada | CA | — | ◇ UNVERIFIED |
| UPUnited Personnel Services, INC. | Whately | MA | — | ◇ UNVERIFIED |
| UPUnited Pipe Bending & Fabrication INC | Portland | OR | — | ◇ UNVERIFIED |
| URUnited Rentals | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| USUnited Science Industries | Dix | IL | — | ◇ UNVERIFIED |
| USUnited Science Industries INC | Okawville | IL | — | ◇ UNVERIFIED |
| USUnited Sign Corporation of Allouez, INC. | De Pere | WI | — | ◇ UNVERIFIED |
| USUnited Signs Company, Incorporated | Laurel | MD | — | ◇ UNVERIFIED |
| USUnited Signs & Signals, INC. | Asheboro | NC | — | ◇ UNVERIFIED |
| USUnited Spring Technology INC | Farmington Hills | MI | — | ◇ UNVERIFIED |
| USUnited States Aluminum CORP. | Vernon | CA | — | ◇ UNVERIFIED |
| USUnited States Awning Company | Sarasota | FL | — | ◇ UNVERIFIED |
| USUnited Steel Ventures INC Dba United Precision Mac | Edina | MN | — | ◇ UNVERIFIED |
| USUnited Storefronts Corporation | Northborough | MA | — | ◇ UNVERIFIED |
| USUnited Sugars Producers & Refiners Cooperative-chicago | Chicago | IL | — | ◇ UNVERIFIED |
| USUnited Support Solutions INC. | Totowa | NJ | — | ◇ UNVERIFIED |
| UTUnited Team Mechanical, LLC | Kaysville | UT | — | ◇ UNVERIFIED |
| UWUnited Weld Services, LLC | York | PA | — | ◇ UNVERIFIED |
| UWUnited Wire Craft, INC. | Des Plaines | IL | — | ◇ UNVERIFIED |
| U5Unity 5 INC | Deerfield | IL | — | ◇ UNVERIFIED |
| UTUnity Tool INC Dba Unity Precision Manufacturing | Maple Grove | MN | — | ◇ UNVERIFIED |
| USUnivar Solutions USA INC. | Carteret | NJ | — | ◇ UNVERIFIED |
| UCUniversal Compression INC | Tulsa | OK | — | ◇ UNVERIFIED |
 Universal Compressor Solutions LLC | Mayfield | KY | — | ◇ UNVERIFIED |
| UDUniversal Dust Collector Mfg & Supply CORP Dba Udc Corporation | Anaheim | CA | — | ◇ UNVERIFIED |
| UFUniversal Fabricators INC | Madison Heights | MI | — | ◇ UNVERIFIED |
| UFUniversal Fireproof Door CO. INC. | Brooklyn | NY | — | ◇ UNVERIFIED |
| UFUniversal Formations INC | Burnsville | MN | — | ◇ UNVERIFIED |
| UHUniversal Head CO INC | Joliet | IL | — | ◇ UNVERIFIED |
| UIUniversal Iron Works, INC | Pacoima | CA | — | ◇ UNVERIFIED |
| UMUniversal Machine Shop | Huntington Beach | CA | — | ◇ UNVERIFIED |
| URUniversal Roll Forming INC | Lindon | UT | — | ◇ UNVERIFIED |
| USUniversal Sawmill | Bungay | IL | — | ◇ UNVERIFIED |
| USUniversal Sheetmetal INC | Woodinville | WA | — | ◇ UNVERIFIED |
| USUniversal Sign Co., LLC | Lafayette | LA | — | ◇ UNVERIFIED |
| USUniversal Sign & Lighting LLC | Fairbanks | AK | — | ◇ UNVERIFIED |
| USUniversal Signs | Hasbrouck Heights | NJ | — | ◇ UNVERIFIED |
| USUniversal Signs CORP. | Hampton Bays | NY | — | ◇ UNVERIFIED |
| USUniversal Signs INC | Woodbury | MN | — | ◇ UNVERIFIED |
| UTUniversal Tool, INC. | Rainbow City | AL | — | ◇ UNVERIFIED |
| UFUniversity Frames INC | Anaheim | CA | — | ◇ UNVERIFIED |
| UPUniversity Park Golo | University Park | IL | — | ◇ UNVERIFIED |
| USUniversity Service | Decatur | IL | — | ◇ UNVERIFIED |
| UUnknown | Topeka | KS | — | ◇ UNVERIFIED |
| UCUnknown Contractor | Forsyth | IL | — | ◇ UNVERIFIED |
| UIUnlimited Image INC | Burnsville | MN | — | ◇ UNVERIFIED |
| UMUpchurch Machine Co., INC. | Charlotte | NC | — | ◇ UNVERIFIED |
