| SSSouthern Specialties CORP | Tulsa | OK | — | ◇ UNVERIFIED |
| STSouth Texas Sheet Metal LLC | Houston | TX | — | ◇ UNVERIFIED |
| SMSouthwark Metal | Southaven | MS | — | ◇ UNVERIFIED |
| SMSouthwark Metal Manufacturing Company | Powdersville | SC | — | ◇ UNVERIFIED |
| S2Spamex 2, LLC | Hartford | WI | — | ◇ UNVERIFIED |
| SISpan-o-matic INC | Brea | CA | — | ◇ UNVERIFIED |
| SFSpecialty Fabrication, INC. | Wichita | KS | — | ◇ UNVERIFIED |
| SFSpecialty Fabrication & Powder Coatingllc | Oil City | PA | — | ◇ UNVERIFIED |
| SFSpecialty Fabricators INC. | York | PA | — | ◇ UNVERIFIED |
| SMSpecialty Metal Fabricators LLC | Portland | OR | — | ◇ UNVERIFIED |
| SSSpecialty Steel Services Facility | Philadelphia | PA | — | ◇ UNVERIFIED |
| SRSpectrum Resources LLC | Suwanee | GA | — | ◇ UNVERIFIED |
| SCSpider Company INC | Machesney Park | IL | — | ◇ UNVERIFIED |
| SSSpider Staging CORP | Seattle | WA | — | ◇ UNVERIFIED |
| SISpig Industries | Bristol | VA | — | ◇ UNVERIFIED |
| SISpinnaker Industries International, INC. | Louisville | KY | — | ◇ UNVERIFIED |
| SMSpiral Manufacturing CO INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| SHSpl Holdings, LLC | Delran | NJ | — | ◇ UNVERIFIED |
| SHSpx Heat Transfer INC. | Tulsa | OK | — | ◇ UNVERIFIED |
| SHSpx Heat Transfer INC / Steel Products Fabrication | Tulsa | OK | — | ◇ UNVERIFIED |
| SFSrs Fabrication, INC. | North Las Vegas | NV | — | ◇ UNVERIFIED |
| SLStage Left Fabrication, LLC | Emerson | GA | — | ◇ UNVERIFIED |
| SCStaging Concepts INC | Brooklyn Park | MN | — | ◇ UNVERIFIED |
| SFStamped Fittings, INC. | Elmira Heights | NY | — | ◇ UNVERIFIED |
| SIStamptech INC | Chester | VA | — | ◇ UNVERIFIED |
| SIStamptech INC | Lynchburg | VA | — | ◇ UNVERIFIED |
| SIStamptech, INC. | Chester | VA | — | ◇ UNVERIFIED |
| SAStandard Armament INC | Glendale | CA | — | ◇ UNVERIFIED |
| SEStandard Elements, LLC | Carbondale | CO | — | ◇ UNVERIFIED |
| SIStandard Iron - Wire Works INC | Sauk Centre | MN | — | ◇ UNVERIFIED |
| SIStandard Iron & Wire Works INC - Alex | Alexandria | MN | — | ◇ UNVERIFIED |
| SMStead Motors | Walnut Creek | CA | — | ◇ UNVERIFIED |
| SSStead Sheet Metal INC. | Aurora | IL | — | ◇ UNVERIFIED |
| SBSteel Building Components INC. | Edison | NJ | — | ◇ UNVERIFIED |
| SISteeldeck INC. | Los Angeles | CA | — | ◇ UNVERIFIED |
| SISteeler INC | Seattle | WA | — | ◇ UNVERIFIED |
| SNSteel Nutz, Inc. | Murrieta | CA | — | ◇ UNVERIFIED |
| SPSteel Products INC. | Los Angeles | CA | — | ◇ UNVERIFIED |
| STSteel Tech Partners LLC | Mitchell | IN | — | ◇ UNVERIFIED |
| SMStephens Metal Products | Yakima | WA | — | ◇ UNVERIFIED |
| SBSterling Boiler & Mechanical, INC. | Gallatin | TN | — | ◇ UNVERIFIED |
| SBSterling Boiler & Mechanical, INC. | Parrish | FL | — | ◇ UNVERIFIED |
| SSStevens Sheetmetal & Ironworks, INC. | Pearl | MS | — | ◇ UNVERIFIED |
| SRStockhouse Realty LLC | Bozrah | CT | — | ◇ UNVERIFIED |
| SMStoll Metalcraft INC | Valencia | CA | — | ◇ UNVERIFIED |
| SPSt. Paul Corrugating CO. | Minneapolis | MN | — | ◇ UNVERIFIED |
| SMStrand Manufacturing Company INC | Hopkins | MN | — | ◇ UNVERIFIED |
| SIStreetscape INC | Huntington Beach | CA | — | ◇ UNVERIFIED |
| SSStreimer Sheet Metal Works INC | Portland | OR | — | ◇ UNVERIFIED |
| SSStreimer Sheet Metal Works INC | Corvallis | OR | — | ◇ UNVERIFIED |
| STStroud's Texas Sheetmetal, LLC | Lubbock | TX | — | ◇ UNVERIFIED |
| SSStuart's Sheet Metal INC. | Austin | TX | — | ◇ UNVERIFIED |
| SSStuart's Sheet Metal, INC. | Leander | TX | — | ◇ UNVERIFIED |
| SSSudholt Sheet Metal, INC. | Aviston | IL | — | ◇ UNVERIFIED |
| SCSulzer Chemtech | Tulsa | OK | — | ◇ UNVERIFIED |
| SCSummit Careers INC | East Longmeadow | MA | — | ◇ UNVERIFIED |
| SISummit INC | Portland | OR | — | ◇ UNVERIFIED |
| SSSummit Sheet Metal LLC | Kingston | PA | — | ◇ UNVERIFIED |
| SSSummit Sheet Metal LLC | Kingston | PA | — | ◇ UNVERIFIED |
| SSSummit Sheet Metal, LLC | Pittston | PA | — | ◇ UNVERIFIED |
| SMSun Metal - Doral Enterprises | Albuquerque | NM | — | ◇ UNVERIFIED |
| SCSuperior Canopy Corporation | Finley | KY | — | ◇ UNVERIFIED |
| SDSuperior Duct Fabrication, Inc. | Las Vegas | NV | — | ◇ UNVERIFIED |
| SFSuperior Fabrication Inc | Punta Gorda | FL | — | ◇ UNVERIFIED |
| SHSuperior Holding INC | Hutchinson | KS | — | ◇ UNVERIFIED |
| SMSuperior Metalworks, INC. | Carlisle | PA | — | ◇ UNVERIFIED |
| SSSuperior Sheet Metal Company, INC. | Kansas City | KS | — | ◇ UNVERIFIED |
| SSSuperior Sheet Metal, LLC | Hudson | NH | — | ◇ UNVERIFIED |
| SRSupreme Roofing Products, INC. | Tuscaloosa | AL | — | ◇ UNVERIFIED |
| SPSutter P. Dahlglen Enterprises INC. | Santa Clara | CA | — | ◇ UNVERIFIED |
| SRSvm - Reno | Sparks | NV | — | ◇ UNVERIFIED |
 Swanson Industries, INC | Madisonville | KY | — | ◇ UNVERIFIED |
| SASwift-cor Aerospace, INC. | Gardena | CA | — | ◇ UNVERIFIED |
| SHSwisher Heating & Air Conditioning, INC. | Phoenix | AZ | — | ◇ UNVERIFIED |
| SMS&w Metal Products INC | Gilbertsville | PA | — | ◇ UNVERIFIED |
| SISystems in Advanced Mechanical | Crofton | MD | — | ◇ UNVERIFIED |
| TDT43 Designs | Hohenwald | TN | — | ◇ UNVERIFIED |
| TOTAC Operating Company | Draper | UT | — | ◇ UNVERIFIED |
| TMTambe Metal Products INC | Victor | NY | — | ◇ UNVERIFIED |
| TSTampa Sheet Metal Company | Tampa | FL | — | ◇ UNVERIFIED |
| TCTank Construction & Engineering INC | Fresno | CA | — | ◇ UNVERIFIED |
| TSTarget Sheetmetal and Manufacturing, INC. | Lubbock | TX | — | ◇ UNVERIFIED |
| TMTartan Manufacturing, INC. | Kansas City | KS | — | ◇ UNVERIFIED |
| TSTassie Siding INC | Salt Lake City | UT | — | ◇ UNVERIFIED |
| TMTaylor Metal INC | Salem | OR | — | ◇ UNVERIFIED |
| TSTcr Systems LLC | Decatur | IL | — | ◇ UNVERIFIED |
| TSTcr Systems, L.l.c. | Havana | IL | — | ◇ UNVERIFIED |
| TCT & C Supply, INC. | Hueytown | AL | — | ◇ UNVERIFIED |
| TMTda Mechanical, INC. | Columbus | GA | — | ◇ UNVERIFIED |
| TMTds Mfg INC | Clinton Twp | MI | — | ◇ UNVERIFIED |
| TITec-fab, Incorporated | Knoxville | TN | — | ◇ UNVERIFIED |
| TITech-air, Incorporated | Uncasville | CT | — | ◇ UNVERIFIED |
| TFTech Fab | Houston | TX | — | ◇ UNVERIFIED |
| TITechnico INC Dba Modern Metal Products | Owatonna | MN | — | ◇ UNVERIFIED |
| TCTechnotherm CORP. | Tulsa | OK | — | ◇ UNVERIFIED |
| TDTed Davis Enterprises, INC. | Oklahoma City | OK | — | ◇ UNVERIFIED |
| TCTei Construction Services, INC. | Royersford | PA | — | ◇ UNVERIFIED |
| TITEKNIK Investments, LLC | Lewisville | TX | — | ◇ UNVERIFIED |
| TBTeledyne Brown Engineering | Huntsville | AL | — | ◇ UNVERIFIED |
| TTTemperature Technologies | Murray | UT | — | ◇ UNVERIFIED |
