| SEShoei Electronic Materials INC | Milpitas | CA | — | ◇ UNVERIFIED |
| SCSierra Chemical CO | Sparks | NV | — | ◇ UNVERIFIED |
| SLSkynano, LLC | Knoxville | TN | — | ◇ UNVERIFIED |
| SLSkynano, LLC | Louisville | TN | — | ◇ UNVERIFIED |
| SLSolenis, LLC | Morrilton | AR | — | ◇ UNVERIFIED |
| SISolesence, INC. | West Lafayette | IN | — | ◇ UNVERIFIED |
| STSolexir Technology CORP | Milpitas | CA | — | ◇ UNVERIFIED |
| SESolimar Energy LLC | Placeholder | CA | — | ◇ UNVERIFIED |
| SASolstice Advanced Materials Us, INC. | Baton Rouge | LA | — | ◇ UNVERIFIED |
| SASolstice Advanced Materials Us, INC. Metropolis | Metropolis | IL | — | ◇ UNVERIFIED |
| SISolutia INC | Trenton | MI | — | ◇ UNVERIFIED |
| SCSolvay Chemicals, INC. Parachute Plant | Parachute | CO | — | ◇ UNVERIFIED |
| SHSonia Hoang | Tracy | CA | — | ◇ UNVERIFIED |
 Southern Ionics INC | Chickasaw | AL | — | ◇ UNVERIFIED |
| Southern Ionics INC | Pasadena | TX | — | ◇ UNVERIFIED |
| Southern Ionics INC. - Lake Charles Facility | Carlyss | LA | — | ◇ UNVERIFIED |
| Southern Ionics INC - Lake Charles Port Operations | Lake Charles | LA | — | ◇ UNVERIFIED |
| Southern Ionics Incorporated | Tuscaloosa | AL | — | ◇ UNVERIFIED |
| Southern Ionics Incorporated Tuscaloosa Facility | Tuscaloosa | AL | — | ◇ UNVERIFIED |
 Southern States Chemical | Wilmington | NC | — | ◇ UNVERIFIED |
| STSouth Texas Chlorine, INC. | Harlingen | TX | — | ◇ UNVERIFIED |
| SMSpecialty Minerals INC | Plymouth | NC | — | ◇ UNVERIFIED |
| SMSpecialty Minerals INC | Selma | AL | — | ◇ UNVERIFIED |
| SMSpecialty Minerals INC | Eastover | SC | — | ◇ UNVERIFIED |
| SMSpecialty Minerals INC | Wisconsin Rapids | WI | — | ◇ UNVERIFIED |
| SMSpecialty Minerals INC | Jay | ME | — | ◇ UNVERIFIED |
| SMSpecialty Minerals INC | Zachary | LA | — | ◇ UNVERIFIED |
| SMSpecialty Minerals INC. | Woodland | ME | — | ◇ UNVERIFIED |
| SMSpecialty Minerals INC - International | International Falls | MN | — | ◇ UNVERIFIED |
| SMSpecialty Minerals Incorporated | Franklin | VA | — | ◇ UNVERIFIED |
| SMSpecialty Minerals Inc, Owner, and Specialty Minerals Mississippi Inc, Operator | Brookhaven | MS | — | ◇ UNVERIFIED |
| SMSpecialty Minerals (michigan) INC. (p1480) | Quinnesec | MI | — | ◇ UNVERIFIED |
| SCStandard Carbon, LLC | Dunnellon | FL | — | ◇ UNVERIFIED |
| SASulphuric Acid Trading | Tampa | FL | — | ◇ UNVERIFIED |
| SCSummit Custom Spray Drying INC @ Flemington Ind Pk | Flemington | NJ | — | ◇ UNVERIFIED |
| SRSummit Research Labs, INC. | Middletown | NY | — | ◇ UNVERIFIED |
 Sun Chemical CORP | Williamsport | MD | — | ◇ UNVERIFIED |
| SPSunedison Polysilicon Facility | Pasadena | TX | — | ◇ UNVERIFIED |
| SASunlit Arizona LLC | Phoenix | AZ | — | ◇ UNVERIFIED |
| SLSuperior Lime & Chemical | Phoenix | AZ | — | ◇ UNVERIFIED |
| SSSw Shattuck Chemical CO INC | Denver | CO | — | ◇ UNVERIFIED |
| SCSynthio Chemicals | Broomfield | CO | — | ◇ UNVERIFIED |
| TLTdc LLC - Westlake Plant | Westlake | LA | — | ◇ UNVERIFIED |
| TTerralithium | Brawley | CA | — | ◇ UNVERIFIED |
| TRTesoro Refining and Marketing Co, LLC | Carson | CA | — | ◇ UNVERIFIED |
| TKTessenderlo Kerley | Dumas | TX | — | ◇ UNVERIFIED |
| TKTessenderlo Kerley INC | Fresno | CA | — | ◇ UNVERIFIED |
| TATetra Arkansas Project LLC - Tetra Arkansas Project - Evergreen Plant | Stamps | AR | — | ◇ UNVERIFIED |
| TATetra Arkansas Project LLC - Tetra Arkansas Project LLC - Evergreen #2 | Magnolia | AR | — | ◇ UNVERIFIED |
| TCTetra Chemicals | Westlake | LA | — | ◇ UNVERIFIED |
