| TLTrinseo LLC (p1025) | Midland | MI | — | ◇ UNVERIFIED |
| TETristream Energy, LLC | Eustace | TX | — | ◇ UNVERIFIED |
| TITrowelon INC | Oneida | WI | — | ◇ UNVERIFIED |
| TSTsrc Specialty Materials R & D Lab | Katy | TX | — | ◇ UNVERIFIED |
| TETuftane Extrusion Technologies Incorporated | Fall River | MA | — | ◇ UNVERIFIED |
| T3Turbo 3d LLC Dba Fugo | Gardena | CA | — | ◇ UNVERIFIED |
| TGTurner Group, Inc | Marietta | GA | — | ◇ UNVERIFIED |
| TPTurret Punch CO Inc/tpc INC | Fontana | CA | — | ◇ UNVERIFIED |
| TMTwelve - Moses Lake Site | Moses Lake | WA | — | ◇ UNVERIFIED |
| TCTwentieth Century Forge | Hubbard | OR | — | ◇ UNVERIFIED |
| TETyco Electronics Corporation | Fuquay Varina | NC | — | ◇ UNVERIFIED |
| TPTyco Plastics | Woodland | CA | — | ◇ UNVERIFIED |
| ULUas Labs LLC | Wausau | WI | — | ◇ UNVERIFIED |
| URUcar Resinas Caribe INC. | Bayamon | PR | — | ◇ UNVERIFIED |
| USUcc Seadrift Operations | Long Mott | TX | — | ◇ UNVERIFIED |
| UHUcla Hematology Oncology Santa Monica | Santa Monica | CA | — | ◇ UNVERIFIED |
| ULUltrapak, LLC | Dunkirk | NY | — | ◇ UNVERIFIED |
| UCUltra-poly Corporation | Berwick | PA | — | ◇ UNVERIFIED |
| UPUltra Poly CORP - Portland | Portland | PA | — | ◇ UNVERIFIED |
| USUmicore Specialty Materials La - Palm Commodities International LLC | Port Allen | LA | — | ◇ UNVERIFIED |
| ULUnifi-kinston LLC | Kinston | NC | — | ◇ UNVERIFIED |
| UCUnion Carbide Brownsville | — | TX | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation | Woodbine | GA | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation | Piscataway | NJ | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation | Lugoff | SC | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation - Dow Chemical CO | Institute | WV | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation - Ucar Emulsion Systems | Garland | TX | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation - Ucc Technology Park Operations | South Charleston | WV | — | ◇ UNVERIFIED |
| UCUnion Carbide CORP Tucker Latex Plant | Tucker | GA | — | ◇ UNVERIFIED |
| UDUnique Dispensing Systems, LLC | Guilford | CT | — | ◇ UNVERIFIED |
| UDUnique Dispensing Systems, LLC | Guilford | CT | — | ◇ UNVERIFIED |
| UTUniroyal Tech CORP Royalite T | Redlands | CA | — | ◇ UNVERIFIED |
| UBUnited Biochemicals LLC | Sanborn | NY | — | ◇ UNVERIFIED |
| UOUnited Organics CORP | Williamston | NC | — | ◇ UNVERIFIED |
| URUnited Resins INC | Pittsgrove Township | NJ | — | ◇ UNVERIFIED |
 United Rotary Brush Corporation | Lenexa | KS | — | ◇ UNVERIFIED |
| USUnivar Solutions Usa, LLC | Charlotte | NC | — | ◇ UNVERIFIED |
| UBUniversal Bioenergy of North America INC | Nettleton | MS | — | ◇ UNVERIFIED |
| UEUniversal Environmental Services, LLC | Peachtree City | GA | — | ◇ UNVERIFIED |
 Universal Plastics - Middlefield (0228000127) | Middlefield | OH | — | ◇ UNVERIFIED |
| UOUniversity of Portland | Portland | OR | — | ◇ UNVERIFIED |
| UUop | Anaheim | CA | — | ◇ UNVERIFIED |
| UPU Payless | Long Beach | CA | — | ◇ UNVERIFIED |
| UIUraseal INC | Dover | NH | — | ◇ UNVERIFIED |
| UCUremet CORP | Santa Ana | CA | — | ◇ UNVERIFIED |
| UCUremet CORP | Garden Grove | CA | — | ◇ UNVERIFIED |
| UHUrethane Holdings, LLC | Alpharetta | GA | — | ◇ UNVERIFIED |
| UEUSA Environment | Pasadena | TX | — | ◇ UNVERIFIED |
| USU. S Amines LLC | Axis | AL | — | ◇ UNVERIFIED |
| URUSA Resources Technology LLC | Elizabeth | NJ | — | ◇ UNVERIFIED |
