| SQSkw Quab Chemicals | Theodore | AL | — | ◇ UNVERIFIED |
| SPSlide Products INC | Wheeling | IL | — | ◇ UNVERIFIED |
| SASlocum Adhesives CORP. | Lynchburg | VA | — | ◇ UNVERIFIED |
| SASlocum Adhesives Corporation | Lynchburg | VA | — | ◇ UNVERIFIED |
| SOSnap on Diagnostics | Elkhorn | WI | — | ◇ UNVERIFIED |
| SRSnf Riceboro Plant | Riceboro | GA | — | ◇ UNVERIFIED |
| SLSolenis LLC - Suffolk | Suffolk | VA | — | ◇ UNVERIFIED |
| SPSolenis-macon Plant | Macon | GA | — | ◇ UNVERIFIED |
| SISolutia INC Anniston Plant | Anniston | AL | — | ◇ UNVERIFIED |
| SISolutia INC - Indian Orchard Plant | Springfield | MA | — | ◇ UNVERIFIED |
| SISongwon International Americas INC. - La Porte | La Porte | TX | — | ◇ UNVERIFIED |
| SLSpecchem, LLC | Kansas City | KS | — | ◇ UNVERIFIED |
 Specialty Construction Brands | Houston | TX | — | ◇ UNVERIFIED |
| Specialty Construction Brands | Aurora | IL | — | ◇ UNVERIFIED |
| SISpecialty Industrial Products, INC. | Spartanburg | SC | — | ◇ UNVERIFIED |
| SCStabond CORP | Gardena | CA | — | ◇ UNVERIFIED |
| SCStepan Company - Fieldsboro Plant | Fieldsboro | NJ | — | ◇ UNVERIFIED |
| SCStruktol Company of America | Cuyahoga Falls | OH | — | ◇ UNVERIFIED |
| SSupelco | Bellefonte | PA | — | ◇ UNVERIFIED |
| SSSuperior Stone Products INC. | Byron Center | MI | — | ◇ UNVERIFIED |
| SCSyntech Chemicals | Houston | TX | — | ◇ UNVERIFIED |
| SASynthomer Adhesive Tehcnologies Eastoflex and East | Longview | TX | — | ◇ UNVERIFIED |
| TETaminco Eastman US - St Gabriel Plant | Saint Gabriel | LA | — | ◇ UNVERIFIED |
| TLTate & Lyle Ingredients Americas LLC | Duluth | MN | — | ◇ UNVERIFIED |
| TLTate & Lyle Sucralose INC | Mc Intosh | AL | — | ◇ UNVERIFIED |
| TATci America | Portland | OR | — | ◇ UNVERIFIED |
| TSTec Specialty Products LLC | Dalton | GA | — | ◇ UNVERIFIED |
| TCTedia Company INC | Fairfield | OH | — | ◇ UNVERIFIED |
| TDThe Dow Chemical Company | Hillsdale | MI | — | ◇ UNVERIFIED |
| TFThermo Fisher Scientific CO | Bridgewater | NJ | — | ◇ UNVERIFIED |
| TFThermo Fisher Scientific (milwaukee) LLC | Milwaukee | WI | — | ◇ UNVERIFIED |
| TCTower Chemical Corporation | Easton | PA | — | ◇ UNVERIFIED |
| TIToyo Ink Bryan Manufacturing Facility | Bryan | TX | — | ◇ UNVERIFIED |
| TCTroy Corporation - Troy Biosciences | Phoenix | AZ | — | ◇ UNVERIFIED |
| TSTsrc Specialty Materials LLC - Research & Development Pilot Plant | Plaquemine | LA | — | ◇ UNVERIFIED |
| TLTwin Lake Chemical, INC. | Lockport | NY | — | ◇ UNVERIFIED |
| TBTwist Bioscience | Wilsonville | OR | — | ◇ UNVERIFIED |
| UPUltra Pure Solutions INC | Carrollton | TX | — | ◇ UNVERIFIED |
| UPUltra Pure Solutions INC | Castroville | CA | — | ◇ UNVERIFIED |
| UNUnc Naval Products | Norwich | CT | — | ◇ UNVERIFIED |
| UUniseal #2 | Evansville | IN | — | ◇ UNVERIFIED |
| UIUniseal Incorporated | Evansville | IN | — | ◇ UNVERIFIED |
| UIUnited Initiators | Theodore | AL | — | ◇ UNVERIFIED |
 United States Gypsum | Dallas | TX | — | ◇ UNVERIFIED |
| UTUnivation Technologies LLC - Catalyst Plant | South Charleston | WV | — | ◇ UNVERIFIED |
| UAUpaco Adhesive | Nashua | NH | — | ◇ UNVERIFIED |
| UAUpaco Adhesives - Division of Worthen Industries | Richmond | VA | — | ◇ UNVERIFIED |
| USU S Amines (portsmouth) L L C | Portsmouth | VA | — | ◇ UNVERIFIED |
| UAUS Army Holston Army Ammunition Plant | Kingsport | TN | — | ◇ UNVERIFIED |
| UDUS Doe Kansas City National Security Campus | Kansas City | MO | — | ◇ UNVERIFIED |
