 Schuff Steel-gulf Coast Airline Drive Facility | Houston | TX | — | ◇ UNVERIFIED |
| SBSchulte Building Systems | Effingham | IL | — | ◇ UNVERIFIED |
| SPSc Products, INC. | Eldorado | IL | — | ◇ UNVERIFIED |
| SCScrew Conveyor Pacific CORP | Visalia | CA | — | ◇ UNVERIFIED |
| SMScully's Metal Fabrication, INC. | Morgan City | LA | — | ◇ UNVERIFIED |
| SSScw Scrape Certify Welding | Fallbrook | CA | — | ◇ UNVERIFIED |
| SDS. Diamond Steel INC. | Iowa City | IA | — | ◇ UNVERIFIED |
| SISdi INC. | Sherman | IL | — | ◇ UNVERIFIED |
| SBSea Box | Cinnaminson | NJ | — | ◇ UNVERIFIED |
| SSeabox | Cinnaminson | NJ | — | ◇ UNVERIFIED |
| SBSea Box INC. | Cinnaminson | NJ | — | ◇ UNVERIFIED |
| SCSeaFab Corporation | Seattle | WA | — | ◇ UNVERIFIED |
| SSSea Side Specialties INC. | Delray Beach | FL | — | ◇ UNVERIFIED |
| SHSecurity Holdings, LLC | Carlstadt | NJ | — | ◇ UNVERIFIED |
| SISeizmic INC | Pomona | CA | — | ◇ UNVERIFIED |
| SSSelect Steel Incorporated | Ottawa | KS | — | ◇ UNVERIFIED |
| SFSelman Fabricating Company, INC. | Bessemer | AL | — | ◇ UNVERIFIED |
| SISemco Incorporated Chillicothe | Chillicothe | MO | — | ◇ UNVERIFIED |
| SMSeminole Machine & Welding, INC. | Largo | FL | — | ◇ UNVERIFIED |
| SISentinel Intelligence Group LLC | Brookpark | OH | — | ◇ UNVERIFIED |
| SMSerett Metalworks | Brooklyn | NY | — | ◇ UNVERIFIED |
| SFSerpa Fabrication, INC. | Corpus Christi | TX | — | ◇ UNVERIFIED |
| SISewell Industrial, INC. | Shelby | NC | — | ◇ UNVERIFIED |
| SFSfs Fabrication | Tulsa | OK | — | ◇ UNVERIFIED |
| SFShane Felter Industries | Uniontown | PA | — | ◇ UNVERIFIED |
| SFShane Fonseca | Westlake Village | CA | — | ◇ UNVERIFIED |
| SSShane Stone Inc. | Roseburg | OR | — | ◇ UNVERIFIED |
| SCShape CORP 144th Facility | Spring Lake | MI | — | ◇ UNVERIFIED |
| SCShape CORP 1900 Facility | Grand Haven | MI | — | ◇ UNVERIFIED |
| SSShape Steel | Liberty | MO | — | ◇ UNVERIFIED |
| STSharkey Technology Group INC. Dba C & T Machining | Burbank | CA | — | ◇ UNVERIFIED |
| SIShatone, INC. | Whitesburg | GA | — | ◇ UNVERIFIED |
| SFShaw Fabrication & Manufacturing, INC. | Baton Rouge | LA | — | ◇ UNVERIFIED |
| SFShawnee Fabricators | Shawnee | OK | — | ◇ UNVERIFIED |
| SFShawnee Fabricators, INC. | Shawnee | OK | — | ◇ UNVERIFIED |
| SSShawnee Steel Company | Shawnee | OK | — | ◇ UNVERIFIED |
| SPShaw Process Fabricators | West Monroe | LA | — | ◇ UNVERIFIED |
| SSShaw Sss Fabricators | Addis | LA | — | ◇ UNVERIFIED |
| SSShelby Steel LLC | Pell City | AL | — | ◇ UNVERIFIED |
| SSShelco Steel Works INC | South Holland | IL | — | ◇ UNVERIFIED |
| SMSheldon Mechanical Corporation | Santa Clarita | CA | — | ◇ UNVERIFIED |
| SSShenkle Steel LLC | Madison | VA | — | ◇ UNVERIFIED |
| SMSherwood Manufacturing Corporation | Northport | MI | — | ◇ UNVERIFIED |
| SBShew Brothers INC. | Marion | IL | — | ◇ UNVERIFIED |
| STSheyenne Tooling & Mfg CO | Cooperstown | ND | — | ◇ UNVERIFIED |
| SMShiner Manufacturing INC. | Shiner | TX | — | ◇ UNVERIFIED |
| SBShollenbarger - Borella INC Dba Golden State Steel | Fowler | CA | — | ◇ UNVERIFIED |
| SIShoreline Industries, INC. | Portsmouth | VA | — | ◇ UNVERIFIED |
| SMShow Me Welding and Fabrication, LLC | Curryville | MO | — | ◇ UNVERIFIED |
| SHS & H Welding INC Dba S & H Metals | Sacramento | CA | — | ◇ UNVERIFIED |
