| SMSeaboard Metal Finishing Company | West Haven | CT | — | ◇ UNVERIFIED |
| SSSeagate Sandblasting | Martin | OH | — | ◇ UNVERIFIED |
| SSeatech | Belle Chasse | LA | — | ◇ UNVERIFIED |
| SMSeaway Manufacturing CORP | Erie | PA | — | ◇ UNVERIFIED |
| SISebring Industrial Plating CO | Sebring | OH | — | ◇ UNVERIFIED |
| SMSecoa Metal Finishing | Dalton | GA | — | ◇ UNVERIFIED |
| SCSelectivend CORP | Waukee | IA | — | ◇ UNVERIFIED |
| SISelect-tron Industries | Erie | PA | — | ◇ UNVERIFIED |
| STSelfridge Technologies Div | Chesterfield Township | MI | — | ◇ UNVERIFIED |
| SMSellers Manufacturing CO. | Danville | KY | — | ◇ UNVERIFIED |
| SISemano INC | Hayward | CA | — | ◇ 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 |
| SDServ-all Die & Tool CO. | Crystal Lake | IL | — | ◇ UNVERIFIED |
| SIService Iron Works-s Lyon | South Lyon | MI | — | ◇ UNVERIFIED |
| SWService Welding and Machine | Louisville | KY | — | ◇ UNVERIFIED |
| SESevenson Environmental Service | Niagara Falls | NY | — | ◇ UNVERIFIED |
| SASfc Adams INC. | Buffalo | NY | — | ◇ UNVERIFIED |
| SMSgl Modern Hard Chrome Svc | Pennsauken | NJ | — | ◇ UNVERIFIED |
| SSShank Screw Products CO | Cicero | IL | — | ◇ 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 |
| SIShelby Industries | Shelbyville | KY | — | ◇ UNVERIFIED |
| SSShelby Steel LLC | Pell City | AL | — | ◇ UNVERIFIED |
| SSShelby Steel Vincent Incorporated | Vincent | AL | — | ◇ UNVERIFIED |
| SPShelbyville Plating & Polishing Company | Shelbyville | IN | — | ◇ UNVERIFIED |
| SSShelco Steel Works INC | South Holland | IL | — | ◇ UNVERIFIED |
| STSheyenne Tooling & Mfg CO | Cooperstown | ND | — | ◇ UNVERIFIED |
| SShopwerks | Braceville | IL | — | ◇ 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 |
| SASiegel-robert Automotive- Bowling Green | Bowling Green | KY | — | ◇ UNVERIFIED |
| SRSiegel Robert Automotive Ripley South | Ripley | TN | — | ◇ UNVERIFIED |
| SRSiegel Robert Plating-siegel Robert Plating | Saint Louis | MO | — | ◇ UNVERIFIED |
| SESiemens Energy, INC | Geismar | LA | — | ◇ UNVERIFIED |
| SSSierra Sandblasting LLC | Tacoma | WA | — | ◇ UNVERIFIED |
| SASifco Applied Surface Concepts | Houston | TX | — | ◇ UNVERIFIED |
| SFSigma Fasteners | Houston | TX | — | ◇ UNVERIFIED |
| SPSignal Plating, INC. | Chattanooga | TN | — | ◇ UNVERIFIED |
| SPSignature Plating | Cibolo | TX | — | ◇ UNVERIFIED |
| SMSignet Machine INC | Grandville | MI | — | ◇ UNVERIFIED |
| SCSilgan Containers Mfg CORP | Oconomowoc | WI | — | ◇ UNVERIFIED |
| SWSilgan White Cap/hazleton Plt | Hazleton | PA | — | ◇ UNVERIFIED |
| SPSimmons Plating & Grinding CO INC | Harahan | LA | — | ◇ UNVERIFIED |
| SPSioux Plating Company | South Sioux City | NE | — | ◇ UNVERIFIED |
| SISix2 INC | Hawthorne | FL | — | ◇ UNVERIFIED |
| SCSix C Fabrication INC | Winnfield | LA | — | ◇ UNVERIFIED |
| SCSize Control Plating CO INC | La Puente | CA | — | ◇ UNVERIFIED |
| SSSkyline Steel | Newton | IL | — | ◇ UNVERIFIED |
| SRSkymark Refuelers | Kansas City | KS | — | ◇ UNVERIFIED |
| SLS L Auburn INC | Auburn | NY | — | ◇ UNVERIFIED |
| SCSmc Corporation of America | Indianapolis | IN | — | ◇ UNVERIFIED |
| SSmf | Minonk | IL | — | ◇ UNVERIFIED |
| SJSmi Joist Sc | Eastover | SC | — | ◇ UNVERIFIED |
| SSSmi Steel Fabricators, INC. Dba Cmc Rebar-orlando | Kissimmee | FL | — | ◇ UNVERIFIED |
| SCSmith Chrome Plating | Walla Walla | WA | — | ◇ UNVERIFIED |
| SMSmithcraft Machine | Wedowee | AL | — | ◇ UNVERIFIED |
| SMSmiths Machine and Welding Company INC | Brookhaven | MS | — | ◇ UNVERIFIED |
| STSmiths Tubular Systems | Laconia | NH | — | ◇ UNVERIFIED |
| SHSmp Holdings, INC. | Anaheim | CA | — | ◇ UNVERIFIED |
| SMSmtc Manufacturing CORP of Massachusetts | Franklin | MA | — | ◇ UNVERIFIED |
| SISnyder Industries INC | Seattle | WA | — | ◇ UNVERIFIED |
| SISoelzer, INC Dba Firestone Fabricators | Signal Hill | CA | — | ◇ UNVERIFIED |
| STSolar Turbines Turbofab Facility | Channelview | TX | — | ◇ UNVERIFIED |
| SPSolder Plating Llc, Dba B&w Plating | Fort Smith | AR | — | ◇ UNVERIFIED |
| SPSolder Plating, LLC Dba B&w Plating | Van Buren | AR | — | ◇ UNVERIFIED |
| SDSolitron Devices INC | Riviera Beach | FL | — | ◇ UNVERIFIED |
| SCSolomon Corporation - Flandreau | Flandreau | SD | — | ◇ UNVERIFIED |
| SPSonoco - Phoenix | Memphis | TN | — | ◇ UNVERIFIED |
| SPSoramatic Precision Machining | Warren | MI | — | ◇ UNVERIFIED |
| SSSoriano Special Coatings | Dallas | TX | — | ◇ UNVERIFIED |
| SBSotek Belrix | Hamburg | NY | — | ◇ UNVERIFIED |
| SESound Enhancement Products | Cary | IL | — | ◇ UNVERIFIED |
| SPSouriau Paande Sequim | Sequim | WA | — | ◇ UNVERIFIED |
| SASousa and Demayo INC | North Attleboro | MA | — | ◇ UNVERIFIED |
| SBSouth Bay Chrome | Santa Ana | CA | — | ◇ UNVERIFIED |
| SISoutheastern Industrial Plating, INC. | Statesville | NC | — | ◇ UNVERIFIED |
| SPSoutheastern Plateworks | Birmingham | AL | — | ◇ UNVERIFIED |
| SFSoutheast Fabricators, INC. | Cottondale | AL | — | ◇ UNVERIFIED |
| SASouthern Aluminum Finishing Company | Atlanta | GA | — | ◇ UNVERIFIED |
| SCSouthern California Plating CO INC | San Diego | CA | — | ◇ UNVERIFIED |
| SESouthern Erectors INC | Pensacola | FL | — | ◇ UNVERIFIED |
| SMSouthern Machinery CORP | Lakeland | FL | — | ◇ UNVERIFIED |
| SMSouthern Metal Processing Company | Oxford | AL | — | ◇ UNVERIFIED |
| SMSouthern Metals Company of Mississippi INC | Laurel | MS | — | ◇ UNVERIFIED |
| SMSouthern Miscellaneous Columbia LLC | West Columbia | SC | — | ◇ UNVERIFIED |
| SPSouthern Painting & Blasting LLC | Casselberry | FL | — | ◇ UNVERIFIED |
| SPSouthern Plating INC | Johnston City | IL | — | ◇ UNVERIFIED |
| SPSouthern Post Texas | San Marcos | TX | — | ◇ UNVERIFIED |
| SRSouthern Rotary Drill | Nauvoo | AL | — | ◇ UNVERIFIED |
| SSSouthern Stamping | Irvington | AL | — | ◇ 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 |
