| TLTrinseo, LLC - Allyn's Point | Ledyard | CT | — | ◇ UNVERIFIED |
| TLTrinseo LLC (p1025) | Midland | MI | — | ◇ UNVERIFIED |
| TPTri Pac INC. | South Bend | IN | — | ◇ UNVERIFIED |
| TLTronox LLC | Henderson | NV | — | ◇ UNVERIFIED |
| TITrowelon INC | Oneida | WI | — | ◇ UNVERIFIED |
| TSTruth Skin Health LLC | Boulder | CO | — | ◇ UNVERIFIED |
| T3Turbo 3d LLC Dba Fugo | Gardena | CA | — | ◇ UNVERIFIED |
| TGTurner Group, Inc | Marietta | GA | — | ◇ UNVERIFIED |
| TPTurret Punch CO Inc/tpc INC | Fontana | CA | — | ◇ UNVERIFIED |
| TCTwentieth Century Forge | Hubbard | OR | — | ◇ UNVERIFIED |
| TITwincraft INC. | Essex Junction | VT | — | ◇ UNVERIFIED |
| UAUbe America INC. | Berkeley | CA | — | ◇ UNVERIFIED |
| URUcar Resinas Caribe INC. | Bayamon | PR | — | ◇ UNVERIFIED |
| USUdm Systems LLC | Raleigh | NC | — | ◇ UNVERIFIED |
| UCUltra-poly Corporation | Berwick | PA | — | ◇ UNVERIFIED |
| UPUltra Poly CORP - Portland | Portland | PA | — | ◇ UNVERIFIED |
| ULUmanos LLC | Seattle | WA | — | ◇ UNVERIFIED |
| UAUmicore Autocat USA INC | Catoosa | OK | — | ◇ UNVERIFIED |
| UCUmicore Cobalt & Energy Products | Maxton | NC | — | ◇ UNVERIFIED |
| UPUmicore Precious Metals Chemistry (pmc) USA LLC | Catoosa | OK | — | ◇ UNVERIFIED |
| USUmicore Specialty Chemicals - Arab Facility | Arab | AL | — | ◇ UNVERIFIED |
| ULUnifi-kinston LLC | Kinston | NC | — | ◇ UNVERIFIED |
| UMUnilever Manufacturing | Jonesboro | AR | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation | Piscataway | NJ | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation - Ucar Emulsion Systems | Garland | TX | — | ◇ UNVERIFIED |
| UDUnique Dispensing Systems, LLC | Guilford | CT | — | ◇ UNVERIFIED |
| UDUnique Dispensing Systems, LLC | Guilford | CT | — | ◇ UNVERIFIED |
| UFUnique Formulation Research Labs Dba Act Labs | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| URUnique Research Formulations INC Dba Act Labs | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| URUnited Resins INC | Pittsgrove Township | NJ | — | ◇ UNVERIFIED |
| USUnited Staffing Associates, LLC | Westlake Village | CA | — | ◇ UNVERIFIED |
| USUnited States Doe - Savannah River Site Managed and Operated By Srns, LLC | Aiken | SC | — | ◇ UNVERIFIED |
| UEUniversal Environmental Services, LLC | Peachtree City | GA | — | ◇ UNVERIFIED |
| UPUniversal Packaging Systems, INC. Dba Paklab | Chino | CA | — | ◇ UNVERIFIED |
| UPUniversal Plant Services | Pasadena | TX | — | ◇ UNVERIFIED |
 Universal Plastics - Middlefield (0228000127) | Middlefield | OH | — | ◇ UNVERIFIED |
| ULUop LLC | Baton Rouge | LA | — | ◇ UNVERIFIED |
| UIUraseal INC | Dover | NH | — | ◇ UNVERIFIED |
| UCUremet CORP | Santa Ana | CA | — | ◇ UNVERIFIED |
| UCUremet CORP | Garden Grove | CA | — | ◇ UNVERIFIED |
| UUUrenco USA | Eunice | NM | — | ◇ UNVERIFIED |
| UHUrethane Holdings, LLC | Alpharetta | GA | — | ◇ UNVERIFIED |
| UAUS Advanced Medical Research INC. | Henderson | NV | — | ◇ UNVERIFIED |
| UDUsalco/ Delta Chemical CORP | Ashtabula | OH | — | ◇ UNVERIFIED |
| ULUsalco Little Rock Plant, LLC | Little Rock | AR | — | ◇ UNVERIFIED |
| UMUsalco Michigan City Plant, LLC | Michigan City | IN | — | ◇ UNVERIFIED |
| UPUsalco Port Allen Plant LLC | Port Allen | LA | — | ◇ UNVERIFIED |
| UAU.s. Army Redstone Arsenal | Redstone Arsenal | AL | — | ◇ UNVERIFIED |
| UDUS Department of the Treasury | Oakland | CA | — | ◇ UNVERIFIED |
| UOUsdol Osha - Atlanta West Ao | Marietta | GA | — | ◇ UNVERIFIED |
