| SIStandard Industrial Mineral in | Laws | CA | — | ◇ UNVERIFIED |
| SMStandard Mineral Company Incorporated | Robbins | NC | — | ◇ UNVERIFIED |
| SMStebgo Metals INC - South St. Paul | South Saint Paul | MN | — | ◇ UNVERIFIED |
| SIStein, INC | Birmingham | AL | — | ◇ UNVERIFIED |
| SIStein, INC. (old Harsco Metals) | Tarrant | AL | — | ◇ UNVERIFIED |
| SLStein LLC (1318003929) | Cleveland | OH | — | ◇ UNVERIFIED |
| SCSt-gobain Ceramics & Plastics | Bryant | AR | — | ◇ UNVERIFIED |
| SAStiefel Aluminum INC | Dade City | FL | — | ◇ UNVERIFIED |
| SMStillwater Mining CO Smelter | Columbus | MT | — | ◇ UNVERIFIED |
| SMStillwater Mining CO Smelter | Columbus | MT | — | ◇ UNVERIFIED |
| SCStoody Company | Bowling Green | KY | — | ◇ UNVERIFIED |
| SPStreetman Plant | Streetman | TX | — | ◇ UNVERIFIED |
| SMSully Miller Contracting CO | Irwindale | CA | — | ◇ UNVERIFIED |
| SVSun Valley Shooting Area | Sun Valley | NV | — | ◇ UNVERIFIED |
| SDSuper Dry Industries INC | Shuqualak | MS | — | ◇ UNVERIFIED |
| SASuperior Aluminum Alloys LLC | New Haven | IN | — | ◇ UNVERIFIED |
| SVSuper Vacuum Mfg CO INC | Loveland | CO | — | ◇ UNVERIFIED |
| SPSupreme Perlite Company | Portland | OR | — | ◇ UNVERIFIED |
| STSurface Technology | Ewing | NJ | — | ◇ UNVERIFIED |
| SSSurplus Salvage Sales Jorge's Recycling | Brownsville | TX | — | ◇ UNVERIFIED |
| SBSussman Brothers Recycling | Allentown | PA | — | ◇ UNVERIFIED |
| SMSuzorite Mineral Products | Dell City | TX | — | ◇ UNVERIFIED |
| SWS & W Recycling | Russellville | KY | — | ◇ UNVERIFIED |
 Syrah Technologies LLC - Active Anode Material Facility | Vidalia | LA | — | ◇ UNVERIFIED |
| TITdy Industries, LLC | Monroe | NC | — | ◇ UNVERIFIED |
| TGTechemet - Genoa Red Bluff Rd Site | Pasadena | TX | — | ◇ UNVERIFIED |
| TMTen Mile Stone CO | Ten Mile | TN | — | ◇ UNVERIFIED |
| TLTervita LLC | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| TWTessler & Weiss /premesco INC | Union | NJ | — | ◇ UNVERIFIED |
| TAThakar Aluminum | Sandusky | OH | — | ◇ UNVERIFIED |
| TAThakar Aluminum CORP | Corona | CA | — | ◇ UNVERIFIED |
| TBThe Battery Recycling Co., INC. | Arecibo | PR | — | ◇ UNVERIFIED |
| TBThe Buyers INC | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| TCThe Cool-amp Conducto-lube CO | Lake Oswego | OR | — | ◇ UNVERIFIED |
| TDThe Doe Run Company | Viburnum | MO | — | ◇ UNVERIFIED |
| TGThe G a Avril Company Brass & Bronze Division | Cincinnati | OH | — | ◇ UNVERIFIED |
| TPThe Perryman CO - Titanium Melting Facility - Phase 3 | Coal Center | PA | — | ◇ UNVERIFIED |
| TRThe R. J. Marshall Company | Southfield | MI | — | ◇ UNVERIFIED |
| TCThermal Ceramics INC | Girard | IL | — | ◇ UNVERIFIED |
| TSThe Strelitz CO INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| TMThorock Metals INC | Compton | CA | — | ◇ UNVERIFIED |
| TITimcor, INC | Defiance | OH | — | ◇ UNVERIFIED |
| TMTimet (titanium Metals) | Henderson | NV | — | ◇ UNVERIFIED |
| TRTitanium Refinery | Salt Lake City | UT | — | ◇ UNVERIFIED |
| TMT Minerals LLC - Perlite Expansion Facility | New Orleans | LA | — | ◇ UNVERIFIED |
| TITms International, LLC | Calvert | AL | — | ◇ UNVERIFIED |
| TITms International, LLC | Broadview Heights | OH | — | ◇ UNVERIFIED |
| TPTomra Pacific, INC | Fremont | CA | — | ◇ UNVERIFIED |
| TRTotal Recycling and Waste Solutions LLC | Tampa | FL | — | ◇ UNVERIFIED |
| TRTotal Recycling and Waste Solutions LLC | Tampa | FL | — | ◇ UNVERIFIED |
