| SPSoutheastern Prestressed Concrete INC | West Palm Beach | FL | — | ◇ UNVERIFIED |
| SFSoutheast Fabricators, INC. | Cottondale | AL | — | ◇ 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 |
| SFSouth Frontier Facility | Lexington | NE | — | ◇ UNVERIFIED |
| SJSouth Jersey Container CORP | Winslow | NJ | — | ◇ UNVERIFIED |
| SMSouthline Metal Products CO | Houston | TX | — | ◇ 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 |
| SOSpancrete of Illinois | Crystal Lake | IL | — | ◇ UNVERIFIED |
| SPSpecial Products Company - Golden Plant | Golden | CO | — | ◇ UNVERIFIED |
| SPSpecial Products Energy | Canton | MA | — | ◇ UNVERIFIED |
| SMSpecialties Mfg Co-brecon Ind Pk | Talladega | AL | — | ◇ UNVERIFIED |
| SMSpecialty Manufacturing | Amesbury | MA | — | ◇ UNVERIFIED |
| SMSpecialty Manufacturing Company INC. | Bath | SD | — | ◇ UNVERIFIED |
| SESpudnik Equipment CO (plant 3) | Blackfoot | ID | — | ◇ UNVERIFIED |
| SSS & S Metal Fabricators | Chamois | MO | — | ◇ UNVERIFIED |
| SPSsw Premier, LLC | Portland | TN | — | ◇ UNVERIFIED |
| SPStack-on Products | Wauconda | IL | — | ◇ UNVERIFIED |
| SBStag Bros Cast Stone CO INC | Lakewood | NJ | — | ◇ UNVERIFIED |
| SCStandard Concrete Products | Atlanta | GA | — | ◇ UNVERIFIED |
| SPStandard Precast, INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| SSStandard Sand & Silica Company | Lake Wales | FL | — | ◇ UNVERIFIED |
| SSStandard Steel Fabricating CO INC | Seattle | WA | — | ◇ UNVERIFIED |
| SSStandard Supply CO | Maysville | KY | — | ◇ 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 Technologies CORP | Jersey City | NJ | — | ◇ UNVERIFIED |
| SPSteeltec Products | Cleveland | OH | — | ◇ UNVERIFIED |
| SVSteel Ventures INC | Wurtland | KY | — | ◇ UNVERIFIED |
| SMSteward Machine CO. | Bainbridge | GA | — | ◇ UNVERIFIED |
| SSStiman Steel | Augusta | ME | — | ◇ UNVERIFIED |
| SBStolt Barging Services | Channelview | TX | — | ◇ 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 |
| SSSts Steel INC | Schenectady | NY | — | ◇ UNVERIFIED |
| SWStud Welding, INC. | Centerville | TN | — | ◇ UNVERIFIED |
| SSSuburban Steel Supply Company LLC | Gahanna | OH | — | ◇ UNVERIFIED |
| SMSunflower Mfg. - Beloit | Beloit | KS | — | ◇ UNVERIFIED |
| SWSunnycrest Wilbert | Auburn | NY | — | ◇ UNVERIFIED |
| SWSunshine Welding | Cape Canaveral | FL | — | ◇ UNVERIFIED |
| SWSunshine Welding-main | Cape Canaveral | FL | — | ◇ UNVERIFIED |
| SCSuper Concrete Company Incorporated | Manassas | VA | — | ◇ UNVERIFIED |
| SCSuperior Concrete Products | Birmingham | 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 |
| TMTcc Materials - Medford | Medford | MN | — | ◇ UNVERIFIED |
| TSTcc - Sioux Falls | Sioux Falls | SD | — | ◇ UNVERIFIED |
| TVTcc - Vinton | Vinton | IA | — | ◇ UNVERIFIED |
| THTerre Hill Concrete Prod Plant 2 | East Earl | PA | — | ◇ UNVERIFIED |
| TETexas Emc Products | Jewett | TX | — | ◇ UNVERIFIED |
| TMTexas Miscellaneous Iron | Oakwood | TX | — | ◇ UNVERIFIED |
| TTextron | Lincoln | NE | — | ◇ UNVERIFIED |
| TGTextron Gse - Premier | Marinette | WI | — | ◇ UNVERIFIED |
| TCThe Canam Steel Corporation | Lafayette | IN | — | ◇ UNVERIFIED |
 The Euclid Chemical Company | Odessa | FL | — | ◇ UNVERIFIED |
| THThe Hustad CO - Central Ave | Minneapolis | MN | — | ◇ UNVERIFIED |
| TIThe Industrial CO (tic) Se | Savannah | GA | — | ◇ UNVERIFIED |
| TQThe Quikrete Companies, LLC | Miami | FL | — | ◇ UNVERIFIED |
| TQThe Quikrete Companies, LLC - Quikrete - Jefferson City | Jefferson Cty | TN | — | ◇ UNVERIFIED |
| TTThe Toro CO - Windom | Windom | MN | — | ◇ UNVERIFIED |
| TQThieman Quality Metal Fabrication, INC. | New Bremen | OH | — | ◇ UNVERIFIED |
| TRThompson Repairs INC | Jacksonville | FL | — | ◇ UNVERIFIED |
| TWThompsons Welding and Machine Works | Philadelphia | MS | — | ◇ UNVERIFIED |
| TMThurston Manufacturing Company | Thurston | NE | — | ◇ UNVERIFIED |
| TRTier Rack Corporation, Como Plant | Como | MS | — | ◇ UNVERIFIED |
| TCTindall Corporation, Moss Point Ready Mix | Moss Point | MS | — | ◇ UNVERIFIED |
| TCTindall Corp-sc Division | Fairforest | SC | — | ◇ UNVERIFIED |
| TSTipton Structural Fabrication INC | Tipton | IA | — | ◇ UNVERIFIED |
| TFTitan Fabrication | Owensboro | KY | — | ◇ UNVERIFIED |
| TSTitan Steel CORP | Kirkville | NY | — | ◇ UNVERIFIED |
| TTTitan Trailer Manufacturing INC Plant 2 | Blue Rapids | KS | — | ◇ UNVERIFIED |
| TFTopeka Foundry and Ironworks CO | Topeka | KS | — | ◇ UNVERIFIED |
