| SSeatech | Belle Chasse | LA | — | ◇ UNVERIFIED |
| SMSellers Manufacturing CO. | Danville | KY | — | ◇ UNVERIFIED |
| SISemco Incorporated Chillicothe | Chillicothe | MO | — | ◇ UNVERIFIED |
| SMSeminole Machine & Welding, INC. | Largo | FL | — | ◇ UNVERIFIED |
| SPSen-dure Products INC | Fort Lauderdale | FL | — | ◇ UNVERIFIED |
| SMSentry Metal Blast INC | Niagara Falls | NY | — | ◇ UNVERIFIED |
| SIService Iron Works-s Lyon | South Lyon | MI | — | ◇ UNVERIFIED |
| SWService Welding and Machine | Louisville | KY | — | ◇ UNVERIFIED |
| SASfc Adams INC. | Buffalo | NY | — | ◇ UNVERIFIED |
| SAShaw App Tubeline | New Brunswick | NJ | — | ◇ UNVERIFIED |
| SPShaw Process Fabricators | West Monroe | LA | — | ◇ UNVERIFIED |
| SSShaw Sss Fabricators | Addis | LA | — | ◇ UNVERIFIED |
| SSShaw Sunland Fabricators INC - Sunland East | Walker | LA | — | ◇ UNVERIFIED |
| SSShelby Steel LLC | Pell City | AL | — | ◇ UNVERIFIED |
| SSShelby Steel Vincent Incorporated | Vincent | AL | — | ◇ UNVERIFIED |
| SSShelco Steel Works INC | South Holland | IL | — | ◇ UNVERIFIED |
| STSheyenne Tooling & Mfg CO | Cooperstown | ND | — | ◇ UNVERIFIED |
| SSShoreline Steel South | Paducah | KY | — | ◇ UNVERIFIED |
| SMShugart Manufacturing | Chester | SC | — | ◇ UNVERIFIED |
| SASiag Aerisyn LLC | Chattanooga | TN | — | ◇ UNVERIFIED |
| SLSic Lazaro US INC | Milwaukee | WI | — | ◇ UNVERIFIED |
| SWSilver Weibull | Aurora | CO | — | ◇ UNVERIFIED |
| SCSix C Fabrication INC | Winnfield | LA | — | ◇ UNVERIFIED |
| SSSkyline Steel | Newton | IL | — | ◇ UNVERIFIED |
| SSmf | Minonk | IL | — | ◇ UNVERIFIED |
| SJSmi Joist Sc | Eastover | SC | — | ◇ UNVERIFIED |
| SSSmi Steel Fabricators, INC. Dba Cmc Rebar-orlando | Kissimmee | FL | — | ◇ UNVERIFIED |
| SISoelzer, INC Dba Firestone Fabricators | Signal Hill | CA | — | ◇ UNVERIFIED |
| STSolar Turbines Turbofab Facility | Channelview | TX | — | ◇ UNVERIFIED |
| SASousa and Demayo INC | North Attleboro | MA | — | ◇ UNVERIFIED |
| SPSoutheastern Plateworks | Birmingham | AL | — | ◇ UNVERIFIED |
| SFSoutheast Fabricators, INC. | Cottondale | AL | — | ◇ UNVERIFIED |
| SESouthern Erectors INC | Pensacola | FL | — | ◇ UNVERIFIED |
| SMSouthern Machinery CORP | Lakeland | FL | — | ◇ UNVERIFIED |
| SMSouthern Metals Company of Mississippi INC | Laurel | MS | — | ◇ UNVERIFIED |
| SPSouthern Post Texas | San Marcos | TX | — | ◇ UNVERIFIED |
| SSSouthern Steel Comapny Limited Liability Company | Charlotte | NC | — | ◇ UNVERIFIED |
| SSSouthern Structural Steel Incorporated | Smithfield | VA | — | ◇ UNVERIFIED |
| SSSouthern Structural Steel of Fl, INC | Saint Petersburg | FL | — | ◇ UNVERIFIED |
| SSSouth Sligo Compressor Station | Sligo | LA | — | ◇ UNVERIFIED |
| SVSouth Valley Mfg | Springfield | MO | — | ◇ UNVERIFIED |
| SHSouthwestern Hollow Metal | Raton | NM | — | ◇ UNVERIFIED |
| SSSouthwest Stair INC | El Mirage | AZ | — | ◇ UNVERIFIED |
| SPSpecial Products Energy | Canton | MA | — | ◇ UNVERIFIED |
| SMSpecialties Mfg Co-brecon Ind Pk | Talladega | AL | — | ◇ UNVERIFIED |
| SMSpecialty Manufacturing | Amesbury | MA | — | ◇ UNVERIFIED |
| SWSsab Wear Solutions LLC | Birmingham | AL | — | ◇ UNVERIFIED |
| SSS & S Metal Fabricators | Chamois | MO | — | ◇ UNVERIFIED |
| SPStainless Process Systems | Oxnard | CA | — | ◇ UNVERIFIED |
| SSStandard Steel Fabricating CO INC | Seattle | WA | — | ◇ UNVERIFIED |
| SFState Fabricators, INC. | Farmingtn Hls | MI | — | ◇ UNVERIFIED |
 Steele Solutions INC | South Milwaukee | WI | — | ◇ UNVERIFIED |
| SFSteel Fab Enterprises Ss Fisher Landfill | Lancaster | PA | — | ◇ UNVERIFIED |
 Steelfab, INC. | York | SC | — | ◇ UNVERIFIED |
| Steelfab, INC. - Texas Division | Durant | OK | — | ◇ UNVERIFIED |
| SOSteelfab of Fayetteville | Fayetteville | NC | — | ◇ UNVERIFIED |
| SOSteelfab Oregon, INC. | Spokane | WA | — | ◇ UNVERIFIED |
| SFSteel Fabricators INC. | Lincoln | NE | — | ◇ UNVERIFIED |
| SFSteel Fabricators, INC. | Fort Collins | CO | — | ◇ UNVERIFIED |
| SFSteel Fabricators L.l.c. | Fort Lauderdale | FL | — | ◇ UNVERIFIED |
| Steelfab West, INC. | Tangent | OR | — | ◇ UNVERIFIED |
| SPSteel Painters INC | Kelso | WA | — | ◇ UNVERIFIED |
| STSteel Tank & Fabricating CO. | Mancelona | MI | — | ◇ UNVERIFIED |
| STSteel Technologies CORP | Jersey City | NJ | — | ◇ UNVERIFIED |
| SPSteeltec Products | Cleveland | OH | — | ◇ UNVERIFIED |
| SVSteel Ventures INC | Wurtland | KY | — | ◇ UNVERIFIED |
| SMSteffes Metal Products, LLC - Grand Forks West | Grand Forks | ND | — | ◇ UNVERIFIED |
| SMSteward Machine CO. | Bainbridge | GA | — | ◇ UNVERIFIED |
| SSStiman Steel | Augusta | ME | — | ◇ UNVERIFIED |
| SLSt Lucie County International Airport | Fort Pierce | FL | — | ◇ UNVERIFIED |
| SCStrick Corporation | Abbeville | SC | — | ◇ UNVERIFIED |
| SSStruc Steel INC | Spring Valley | CA | — | ◇ UNVERIFIED |
| SSStructural Standards INC | Sparta | MI | — | ◇ UNVERIFIED |
| SSStructural Steel of Carolina | Hickory | NC | — | ◇ UNVERIFIED |
| SSStructural Steel Services INC Plant 2 | Meridian | MS | — | ◇ UNVERIFIED |
| SSStructural Steel Services Inc, Plant 3 | Meridian | MS | — | ◇ UNVERIFIED |
| SSStructural Steel Services, Plant 1 | Meridian | MS | — | ◇ UNVERIFIED |
| SWStruthers Wells Corp/warren | Warren | PA | — | ◇ UNVERIFIED |
| SSSts Steel INC | Schenectady | NY | — | ◇ UNVERIFIED |
| SWStud Welding, INC. | Centerville | TN | — | ◇ UNVERIFIED |
| SSSuburban Steel Supply Company LLC | Gahanna | OH | — | ◇ UNVERIFIED |
| SSSudden Services Inc, Distribution and Operations Center | Philadelphia | MS | — | ◇ UNVERIFIED |
| SFSunbelt Fabricator | Steele | AL | — | ◇ UNVERIFIED |
| SSSuper Steel LLC | Milwaukee | WI | — | ◇ UNVERIFIED |
| SSSuper Steel Products CORP | Milwaukee | WI | — | ◇ UNVERIFIED |
| SSSymons Steel Forms Div | New Braunfels | TX | — | ◇ UNVERIFIED |
| TMTalley Metal Products | Hagerstown | MD | — | ◇ UNVERIFIED |
| TITamer Industries | Somerset | MA | — | ◇ UNVERIFIED |
| TATampa Amalgamated Steel | Tampa | FL | — | ◇ UNVERIFIED |
| TCTank Connection | Galesburg | KS | — | ◇ UNVERIFIED |
| TITate, INC. | Pocahontas | AR | — | ◇ UNVERIFIED |
| TFTaylor Forge Engineered Systems - Greeley | Garnett | KS | — | ◇ UNVERIFIED |
| TFTaylor Forge Engineered Systems - Paola | Paola | KS | — | ◇ UNVERIFIED |
| TMTeilhaber Manufacturing Corporation | Broomfield | CO | — | ◇ UNVERIFIED |
| TMTexas Miscellaneous Iron | Oakwood | TX | — | ◇ UNVERIFIED |
| TSTexas Steel Processing | Houston | TX | — | ◇ UNVERIFIED |
| TGTextron Gse - Premier | Marinette | WI | — | ◇ UNVERIFIED |
| TCThe Canam Steel Corporation | Lafayette | IN | — | ◇ UNVERIFIED |
| THThe Hustad CO - Central Ave | Minneapolis | MN | — | ◇ UNVERIFIED |
| TIThe Industrial CO (tic) Se | Savannah | GA | — | ◇ UNVERIFIED |
