| SASouth Austin Workshop, LLC | Austin | TX | — | ◇ UNVERIFIED |
| SBSouth Bay Iron, INC | Buena Park | CA | — | ◇ UNVERIFIED |
| SESoutheastern Engineering Sales INC | Colonial Heights | VA | — | ◇ UNVERIFIED |
| SMSoutheastern Metal Fabricator | Rockland | MA | — | ◇ UNVERIFIED |
| SASouthern Aluminum Finishing D.b.a. Saf Metal Fab | Villa Rica | GA | — | ◇ UNVERIFIED |
| SASouthern Aluminum Finishing D.b.a. Saf Metal Fab | Atlanta | GA | — | ◇ UNVERIFIED |
| SCSouthern Custom Fabrication | Carencro | LA | — | ◇ UNVERIFIED |
| SESouthern Enterprises of Southeast Louisiana, INC. | Ponchatoula | LA | — | ◇ UNVERIFIED |
| SISouthern Industrial Metal Fabricators INC | Smyrna | GA | — | ◇ UNVERIFIED |
| SMSouthern Metal Processing Company | Oxford | AL | — | ◇ UNVERIFIED |
| SMSouthern Metal Restoration Company, LLC | Newnan | GA | — | ◇ UNVERIFIED |
| SMSouthern Miscellaneous Columbia LLC | West Columbia | SC | — | ◇ UNVERIFIED |
| SPSouthern Perfection Fabrication Holdings, INC. | Byron | GA | — | ◇ UNVERIFIED |
| SRSouthern Rust Furniture LLC | Monroe | NC | — | ◇ UNVERIFIED |
| SVSouthern Vac, LLC | Grand Prairie | TX | — | ◇ UNVERIFIED |
| SFSouth Florida Aluminum INC. | Lake Worth | FL | — | ◇ UNVERIFIED |
| SCSouth-land Carbon Products, INC. | Birmingham | AL | — | ◇ UNVERIFIED |
| SMSouthland Manufacturing INC | Douglasville | GA | — | ◇ UNVERIFIED |
| SLSouthline - Lpgs Tanforan LLC | South San Francisco | CA | — | ◇ UNVERIFIED |
| SPSouth Plains Steel, INC. | Lubbock | TX | — | ◇ UNVERIFIED |
| SMSouthwark Metal Manufacturing CO. | Fremont | NE | — | ◇ UNVERIFIED |
| SESouthwest Engineering Company | Oklahoma City | OK | — | ◇ UNVERIFIED |
| SSpacesonic | San Carlos | CA | — | ◇ UNVERIFIED |
| SCSpaid Corporation, INC. | Pittsburgh | PA | — | ◇ UNVERIFIED |
| SESpantex Expanded Metal, INC. | Lincolnton | NC | — | ◇ UNVERIFIED |
| SSSpare Skid Plate | Aurora | CO | — | ◇ UNVERIFIED |
| SESparkman Enterprises LLC | Tucson | AZ | — | ◇ UNVERIFIED |
| SSSpartan Steel LLC | Pocatello | ID | — | ◇ UNVERIFIED |
| SMSpartech Marine Industries Florida | Rockledge | FL | — | ◇ UNVERIFIED |
| SBSpec Built Systems INC | Chula Vista | CA | — | ◇ UNVERIFIED |
| SFSpecial Fab & Machine, INC. | Lexington | NC | — | ◇ UNVERIFIED |
| SFSpecial Fleet Service | Harrisonburg | VA | — | ◇ UNVERIFIED |
| SISpecial Iron Security Systems INC | South El Monte | CA | — | ◇ UNVERIFIED |
| SBSpeciality Bar Products Company | Blairsville | PA | — | ◇ UNVERIFIED |
| SMSpeciality Manufacturing | Nazareth | PA | — | ◇ UNVERIFIED |
| SSSpeciality Stairs and Miscellaneous Fabrication INC | Pearl | MS | — | ◇ UNVERIFIED |
| SFSpecialized Fabrication & Machine INC | Eugene | OR | — | ◇ UNVERIFIED |
| STSpecialized Turning, INC. | Peabody | MA | — | ◇ UNVERIFIED |
| SMSpecial Metal Works | Rayne | LA | — | ◇ UNVERIFIED |
| SASpecialty Applications | Ponchatoula | LA | — | ◇ UNVERIFIED |
| SBSpecialty Building Components | Pico Rivera | CA | — | ◇ UNVERIFIED |
| SESpecialty Engineering Tool & Die, LLC | Huntington | IN | — | ◇ UNVERIFIED |
| SMSpecialty Machine and CNC Inc. | Battle Ground | IN | — | ◇ UNVERIFIED |
| SMSpecialty Metal Fabricators | Caledonia | MI | — | ◇ UNVERIFIED |
| SPSpecialty Performance LLC | Dahlonega | GA | — | ◇ UNVERIFIED |
| SSSpecialty Support Systems, INC. | Levittown | PA | — | ◇ UNVERIFIED |
| SSSpecialty Systems | Bloomington | MN | — | ◇ UNVERIFIED |
| SSSpecific Systems, LLC | Tulsa | OK | — | ◇ UNVERIFIED |
| STSpede Tool Mfg CO -yucca Rd | Adelanto | CA | — | ◇ UNVERIFIED |
| SBSpike Brewing, LLC | Milwaukee | WI | — | ◇ UNVERIFIED |
| SMSpill-stop Mfg. LLC | Melrose Park | IL | — | ◇ UNVERIFIED |
| SSSpiral Stairs of America, LLC | Erie | PA | — | ◇ UNVERIFIED |
| SSSportsman Steel Safe Company | Long Beach | CA | — | ◇ UNVERIFIED |
| SSSportsman Steel Safes | Long Beach | CA | — | ◇ UNVERIFIED |
| STSportsman Trailers | Santa Fe | TX | — | ◇ UNVERIFIED |
| SLSportswire LLC | Langley | OK | — | ◇ UNVERIFIED |
 Sportworks Global LLC | Mukilteo | WA | — | ◇ UNVERIFIED |
| SSSpraying System CO | Wheaton | IL | — | ◇ UNVERIFIED |
| SKSpray King Mfg INC | Fresno | CA | — | ◇ UNVERIFIED |
| SSSprial Systems, INC. | Nesbit | MS | — | ◇ UNVERIFIED |
| SRSpringfield Re-manuf CORP | Springfield | MO | — | ◇ UNVERIFIED |
| SWSpringfield Welding & Mfg CO INC | Waunakee | WI | — | ◇ UNVERIFIED |
| SMSpring Metal Recycling,llc | Atlanta | GA | — | ◇ UNVERIFIED |
 Springs Fabrication - Waynoka | Colorado Springs | CO | — | ◇ UNVERIFIED |
| SQS. Q. Fabrication, INC. | Andalusia | AL | — | ◇ UNVERIFIED |
| SLSquare10Source, LLC | Plant City | FL | — | ◇ UNVERIFIED |
| SRS & R Architectural Metals INC | Anaheim | CA | — | ◇ UNVERIFIED |
| SIS.R. Iron, Inc. | Windsor | CA | — | ◇ UNVERIFIED |
| SMSrp Manufacturing | Pleasant Grove | UT | — | ◇ UNVERIFIED |
| SASsc & Aluminum Fabrications INC | West Palm Beach | FL | — | ◇ UNVERIFIED |
| SCS.S. Connections, LLC | Denver | CO | — | ◇ UNVERIFIED |
| SFS&s Fabrication LLC | Cleveland | TX | — | ◇ UNVERIFIED |
| SFS&S Fire Pits | College Park | GA | — | ◇ UNVERIFIED |
| SCSsi Corporation | Julesburg | CO | — | ◇ UNVERIFIED |
| SIS.s. Industries | Collegeville | PA | — | ◇ UNVERIFIED |
| SISs Industries Llc, Dba Salter Spiral Stair | Collegeville | PA | — | ◇ UNVERIFIED |
| STS-square Tube Products, INC. | Commerce City | CO | — | ◇ UNVERIFIED |
| SCSst Custom Fabricators | Okeechobee | FL | — | ◇ UNVERIFIED |
| SPStack-on Products | Wauconda | IL | — | ◇ UNVERIFIED |
| SMStaco Manufacturing Dba Staco Decorative Iron | Hattiesburg | MS | — | ◇ UNVERIFIED |
| SHStage House | Las Vegas | NV | — | ◇ UNVERIFIED |
| SCStaging Concepts INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| SAStainless and Repair, INC. | Marshfield | WI | — | ◇ UNVERIFIED |
| SCStainless Cable & Railing, Inc | Washougal | WA | — | ◇ UNVERIFIED |
| SCStainless Concepts, LLC | Zeeland | MI | — | ◇ UNVERIFIED |
| SSStainless Steel Custom Fabricators | Houston | TX | — | ◇ UNVERIFIED |
| SSStainless Steel Fabricators INC. | La Mirada | CA | — | ◇ UNVERIFIED |
| SSStainless Steel Technologies and Pressure Vessels | Saint Paul | MN | — | ◇ UNVERIFIED |
| SUStainless Unlimited, INC. | Omro | WI | — | ◇ UNVERIFIED |
| SAStairs and Rails INC. | Melrose Park | IL | — | ◇ UNVERIFIED |
| SMStambaugh Metal Inc/hanover | Hanover | PA | — | ◇ UNVERIFIED |
| SIStandard Iron, INC. | Chattanooga | TN | — | ◇ UNVERIFIED |
| SIStandard Iron, INC. | Grand Island | NE | — | ◇ UNVERIFIED |
| SIStandard Iron & Wire Works | Thomson | GA | — | ◇ UNVERIFIED |
| SMStandard Motor Electronics | Orlando | FL | — | ◇ UNVERIFIED |
| SSStandard Sculpture LLC | Los Angeles | CA | — | ◇ UNVERIFIED |
| SSStandard Sheet Metal CORP. | Norfolk | VA | — | ◇ UNVERIFIED |
| SLStanford Linear Accelerator Center | Stanford | CA | — | ◇ UNVERIFIED |
| SLStar Lake Fabrication | Litchfield | MN | — | ◇ UNVERIFIED |
| SAStarlite Aluminum Products INC. | Tulsa | OK | — | ◇ UNVERIFIED |
