| SPShintech Plaquemine Plant | Plaquemine | LA | 500+ | ● ACTIVE |
Sila Nanotechnologies, INC. | Alameda | CA | 100–499 | ● ACTIVE |
| SCSilbond CORP | Weston | MI | 20–99 | ● ACTIVE |
| SESilver Eagle Refining, INC. | Evanston | WY | 20–99 | ● ACTIVE |
| SMSipi Metals CORP | Chicago | IL | 100–499 | ● ACTIVE |
Snyder Manufacturing INC. | Dover | OH | 20–99 | ● ACTIVE |
| SRSouthern Resin, INC. | Thomasville | NC | 20–99 | ● ACTIVE |
| SMState Metal Industries INC | Camden | NJ | 20–99 | ● ACTIVE |
| SDSteel Dust Recycling LLC | Millport | AL | 100–499 | ● ACTIVE |
| SCStepan Chemical | Maywood | NJ | 20–99 | ● ACTIVE |
| SCStepan Company | Columbus | GA | 20–99 | ● ACTIVE |
| SMSulzer Metco (us) Troy | Troy | MI | 20–99 | ● ACTIVE |
| SCSuperior Composites CO LLC | Vanceburg | KY | 100–499 | ● ACTIVE |
| SRSuperior Refinery CO. | Superior | WI | 100–499 | ● ACTIVE |
| SNSurteco North Amer Inc/jeannette Plt | Jeannette | PA | 100–499 | ● ACTIVE |
| SUSyensqo USA LLC. | Baltimore | MD | 20–99 | ● ACTIVE |
| SISymrise, INC. - Bushy Park | Goose Creek | SC | 100–499 | ● ACTIVE |
| SJSymrise Jacksonville Facility | Jacksonville | FL | 100–499 | ● ACTIVE |
Synquest Laboratories, INC. | Alachua | FL | 20–99 | ● ACTIVE |
| SUSynthomer USA LLC | Roebuck | SC | 20–99 | ● ACTIVE |
| TMTaft Manufacturing Company | Taft | CA | 1–19 | ● ACTIVE |
Tcr Composites INC | Ogden | UT | 20–99 | ● ACTIVE |
Teak Isle, INC | Ocoee | FL | 100–499 | ● ACTIVE |
| TATeknor Apex Tennessee CO | Brownsville | TN | 500+ | ● ACTIVE |
Thatcher Company of California, INC. | Sacramento | CA | 20–99 | ● ACTIVE |
Thatcher Company of Nevada, INC. | Henderson | NV | 20–99 | ● ACTIVE |
| TCThatcher Company of New York | Williamson | NY | 20–99 | ● ACTIVE |
| TCThe Chemours Company Fc, Llc, Belle | Belle | WV | 100–499 | ● ACTIVE |
The Indium Corporation of America | Rome | NY | — | ● ACTIVE |
| TFThermo Fisher Scientific | Chelmsford | MA | 100–499 | ● ACTIVE |
Titan International, INC. | Pottstown | PA | 20–99 | ● ACTIVE |
| TCTokai Carbon Cb LTD - Addis Facility | Addis | LA | 20–99 | ● ACTIVE |
| TRToledo Refining Company LLC | Oregon | OH | 100–499 | ● ACTIVE |
| TSToll Solutions LLC | Duncan | SC | 20–99 | ● ACTIVE |
Toray Advanced Composites Usa, INC. | Morgan Hill | CA | 100–499 | ● ACTIVE |
| TPTotalenergies Petrochemicals & Refining INC - Port Arthur Refinery | Port Arthur | TX | 500+ | ● ACTIVE |
| TPTotalenergies Petrochemicals & Refining USA INC - Grand Junction Plant | Grand Junction | CO | 20–99 | ● ACTIVE |
Transene CO INC | Danvers | MA | — | ● ACTIVE |
Ultimate Linings LLC | Lebanon | TN | 100–499 | ● ACTIVE |
| UOUmicore Optical Materials USA INC. | Quapaw | OK | 20–99 | ● ACTIVE |
| UIUnited Initiators, INC. | Helena | AR | 20–99 | ● ACTIVE |
United Plastic Molders, INC. | Jackson | MS | 20–99 | ● ACTIVE |
Universal Plastics Corporation | Holyoke | MA | 20–99 | ● ACTIVE |
Univertical LLC | Angola | IN | 20–99 | ● ACTIVE |
| ULUop LLC - Honeywell | Chickasaw | AL | 100–499 | ● ACTIVE |
| UNUS Nitrogen LLC | Midway | TN | 20–99 | ● ACTIVE |
| UPUS Polymers Accurez LLC | Saint Louis | MO | 20–99 | ● ACTIVE |
| VCValero Corpus Christi Refineries - West Plant | Corpus Christi | TX | 100–499 | ● ACTIVE |
| VRValero Refining Company - Ca | Benicia | CA | 100–499 | ● ACTIVE |
| VWValero Wilmington Refinery | Wilmington | CA | 100–499 | ● ACTIVE |