| SMSms Mill Services LLC Contractor of Ace | Burns Harbor | IN | — | ◇ UNVERIFIED |
| SMSnl-iov Montclair Owner LLC | Montclair | CA | — | ◇ UNVERIFIED |
| SISolsil Incorporated (0684000225) | Beverly | OH | — | ◇ UNVERIFIED |
| SPSouthern Perfection Fabrication Holdings, INC. | Byron | GA | — | ◇ UNVERIFIED |
| SSSouthern Star Steel Services LLC | Lorena | TX | — | ◇ UNVERIFIED |
| SSSouthern Steel Fabricators | Metairie | LA | — | ◇ UNVERIFIED |
| SSSouthern Steel Products CO | Clarksburg | WV | — | ◇ UNVERIFIED |
| SSSouthern Steel - Wire Incorporated | Madison | NC | — | ◇ UNVERIFIED |
| SCSouthwestern Creations LLC | South West City | MO | — | ◇ UNVERIFIED |
| SMSouthwind Milling Company, LLC | Pine Bluff | AR | — | ◇ UNVERIFIED |
| SMSpg Mechanical | Pocatello | ID | — | ◇ UNVERIFIED |
| SSS & S Custom Iron Works Llc | Redmond | WA | — | ◇ UNVERIFIED |
| SSStainless Steel Tanks, INC. | Saint Mary | MO | — | ◇ UNVERIFIED |
| SFStanley-bostitch Fastening Systems | Clinton | CT | — | ◇ UNVERIFIED |
| SSState Steel of South Dakota, INC. | Sioux Falls | SD | — | ◇ UNVERIFIED |
| SSStation Steel Services, Inc | Milford | PA | — | ◇ UNVERIFIED |
| SDSteel Dynamics, INC. | Lake City | FL | — | ◇ UNVERIFIED |
| SDSteel Dynamics, INC. (sdi), Structural | Columbia City | IN | — | ◇ UNVERIFIED |
| SDSteel Dynamics, INC. - Swva, INC. | Huntington | WV | — | ◇ UNVERIFIED |
| SRSteel Resources Unlimited, INC. | Miramar | FL | — | ◇ UNVERIFIED |
| SRSteel Resources Unlimited, INC. | Miami | FL | — | ◇ UNVERIFIED |
| STSteel Technology & Design, INC. | Lakeland | FL | — | ◇ UNVERIFIED |
 Stephens Pipe & Steel LLC. Dba Stephens Pipe & Ste | Russell Springs | KY | — | ◇ UNVERIFIED |
| SSSterling Steel CO LLC | Sterling | IL | — | ◇ UNVERIFIED |
| SSSterling Steel Fabrications INC | West Palm Beach | FL | — | ◇ UNVERIFIED |
| SPSuncoast Projects, LLC | Groveland | FL | — | ◇ UNVERIFIED |
| SGSuncoke Gpi LLC | Granite City | IL | — | ◇ UNVERIFIED |
| SSSuperior Steel, INC. | Rochester | NY | — | ◇ UNVERIFIED |
| SISymmco Inc/sykesville | Sykesville | PA | — | ◇ UNVERIFIED |
| TTamco | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| TWTatano Wire and Steel | Canonsburg | PA | — | ◇ UNVERIFIED |
| TSTaubensee Steel & Wire CO | Henderson | KY | — | ◇ UNVERIFIED |
| TNTechalloy Northampton Wire Plant - Closed | Northampton | MA | — | ◇ UNVERIFIED |
| TCTejas Casing | Houston | TX | — | ◇ UNVERIFIED |
| TATeledyne Adams | Union | NJ | — | ◇ UNVERIFIED |
| TPTerrycable Products | Hesperia | CA | — | ◇ UNVERIFIED |
| TSTexas Steel | Portland | TX | — | ◇ UNVERIFIED |
| TSTexas Steel Tech LLC | Weatherford | TX | — | ◇ UNVERIFIED |
| TWTexas Wheel Repair Express 360 LLC | Dallas | TX | — | ◇ UNVERIFIED |
| T2The 291 Cpw Condominium | New York | NY | — | ◇ UNVERIFIED |
| TCThe Carlstar Group LLC | Ontario | CA | — | ◇ UNVERIFIED |
| THThe Herrick Corporation | San Bernardino | CA | — | ◇ UNVERIFIED |
| TIThe Iron Works LTD. | Des Moines | IA | — | ◇ UNVERIFIED |
| TDTherm-o-link Dba Vulkor INC. | Warren | OH | — | ◇ UNVERIFIED |
| TTThe Timken Company | Canton | OH | — | ◇ UNVERIFIED |
| TTThe Timken Steel Corporation | Canton | OH | — | ◇ UNVERIFIED |
| TTThe Timkensteel Corporation | Canton | OH | — | ◇ UNVERIFIED |
| TWThe Wilmington Iron and Metal Company, Inc. | Wilmington | OH | — | ◇ UNVERIFIED |
| TCTimkensteel CORP - Faircrest Steel Plant | Canton | OH | — | ◇ UNVERIFIED |
| TCTimkensteel CORP - Harrison Steel Plant | Canton | OH | — | ◇ UNVERIFIED |
