| SASmith Art Conservation LLC | Los Angeles | CA | — | ◇ UNVERIFIED |
| STSmith Truck Crane & Equipment, INC. | Cuyahoga Falls | OH | — | ◇ UNVERIFIED |
| SISmithworks Iron and Design Inc. | Decatur | GA | — | ◇ UNVERIFIED |
| SISmithworks Iron & Design, Inc. | Decatur | GA | — | ◇ UNVERIFIED |
| SMSmyth Metal Works LLC | Montpelier | VT | — | ◇ UNVERIFIED |
 Snorkel International INC | Elwood | KS | — | ◇ UNVERIFIED |
| SOSolar of Michigan | Coopersville | MI | — | ◇ UNVERIFIED |
| SISolher Iron, Inc. | San Francisco | CA | — | ◇ UNVERIFIED |
| SRSolid Rock Gate Supply, INC Dba Welding Fabrication Services | Post Falls | ID | — | ◇ UNVERIFIED |
| SISomatex, INC. | Rumford | ME | — | ◇ UNVERIFIED |
| SWSonoma Welding & Fabrication LLC | Cape May | NJ | — | ◇ UNVERIFIED |
| SCSonoran Capital Group, INC. | Tucson | AZ | — | ◇ UNVERIFIED |
| SASouth Anna Stair & Rail | Norfolk | VA | — | ◇ UNVERIFIED |
| SBSouth Bay Iron, INC | Buena Park | CA | — | ◇ 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 |
| SFSouth Florida Aluminum INC. | Lake Worth | FL | — | ◇ UNVERIFIED |
| SISouthwest Industrial Rigging | Black Canyon City | AZ | — | ◇ UNVERIFIED |
| SSpacesonic | San Carlos | CA | — | ◇ UNVERIFIED |
| SISpanco, Incorporated | Morgantown | PA | — | ◇ UNVERIFIED |
| SESpantex Expanded Metal, INC. | Lincolnton | NC | — | ◇ UNVERIFIED |
| SISpecial Iron Security Systems INC | South El Monte | CA | — | ◇ UNVERIFIED |
| SSSpeciality Stairs and Miscellaneous Fabrication INC | Pearl | MS | — | ◇ UNVERIFIED |
| SMSpecial Metal Works | Rayne | LA | — | ◇ UNVERIFIED |
| SBSpecialty Building Components | Pico Rivera | CA | — | ◇ UNVERIFIED |
| SMSpecialty Metal Fabricators | Caledonia | MI | — | ◇ UNVERIFIED |
| SSSpecialty Systems | Bloomington | MN | — | ◇ UNVERIFIED |
| SSSpiral Stairs of America, LLC | Erie | PA | — | ◇ UNVERIFIED |
| SSSportsman Steel Safes | Long Beach | CA | — | ◇ UNVERIFIED |
| SSSprial Systems, INC. | Nesbit | MS | — | ◇ UNVERIFIED |
| SRS & R Architectural Metals INC | Anaheim | CA | — | ◇ UNVERIFIED |
| SIS.R. Iron, Inc. | Windsor | CA | — | ◇ 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 |
| SMStaco Manufacturing Dba Staco Decorative Iron | Hattiesburg | MS | — | ◇ UNVERIFIED |
| STStafford Tower Cranes of America, LLC | Denver | CO | — | ◇ UNVERIFIED |
| SCStaging Concepts INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| SCStainless Cable & Railing, Inc | Washougal | WA | — | ◇ UNVERIFIED |
| SAStairs and Rails INC. | Melrose Park | IL | — | ◇ UNVERIFIED |
| SIStandard Iron, INC. | Chattanooga | TN | — | ◇ UNVERIFIED |
| SSStandard Sculpture LLC | Los Angeles | CA | — | ◇ UNVERIFIED |
| SCStar Crane & Hoist INC. | Trenton | MI | — | ◇ UNVERIFIED |
| SAStarlite Aluminum Products INC. | Tulsa | OK | — | ◇ UNVERIFIED |
| SCSteel City CORP | Youngstown | OH | — | ◇ UNVERIFIED |
| SISteelco INC | Denver | CO | — | ◇ UNVERIFIED |
| SDSteel Designs Iron Artwork LLC | Charlotte | NC | — | ◇ UNVERIFIED |
 Steele Solutions INC | Franklin | WI | — | ◇ UNVERIFIED |
| SFSteel Farmer LLC | Saint Francis | WI | — | ◇ UNVERIFIED |
 Steelhead Metal Works | Newark | CA | — | ◇ UNVERIFIED |
| SPSteel Partners, LLC | Las Vegas | NV | — | ◇ UNVERIFIED |
| SPSteel Partners, LLC | Las Vegas | NV | — | ◇ UNVERIFIED |
| SPSteel Partners, LLC | Henderson | NV | — | ◇ UNVERIFIED |
| SPSteel Products, INC | Sarasota | FL | — | ◇ UNVERIFIED |
| SMSteelrunner Metal Fabrication LLC | Beaverton | OR | — | ◇ UNVERIFIED |
| SSSteel Services, INC. | Norfolk | VA | — | ◇ UNVERIFIED |
 Steel Services Supplies | Toa Baja | PR | — | ◇ UNVERIFIED |
| SDSterling Dula, a Division of Kane Innovations | Erie | PA | — | ◇ UNVERIFIED |
| SSSterling Steel Company | Portland | OR | — | ◇ UNVERIFIED |
| SIStewart Iron Works LLC | Erlanger | KY | — | ◇ UNVERIFIED |
| SIStiltz Iron, INC | Clarksville | TN | — | ◇ UNVERIFIED |
| SIStocklin Iron INC | Santa Rosa | CA | — | ◇ UNVERIFIED |
| SMStone Manufacturing Company | Gardena | CA | — | ◇ UNVERIFIED |
| SMStone Manufacturing Custom Handmade Fireplace Accessories LLC | Buffalo Grove | IL | — | ◇ UNVERIFIED |
| SMStrathmore Machinery INC | Strathmore | CA | — | ◇ UNVERIFIED |
| SSStretch Solutions LLC | Riverside | CA | — | ◇ UNVERIFIED |
| SRStuart Rush | Damascus | VA | — | ◇ UNVERIFIED |
| SFSuperior Fabrication & Welding LLC | Punta Gorda | FL | — | ◇ UNVERIFIED |
| SISuperior Iron INC | Otsego | MN | — | ◇ UNVERIFIED |
 Superior Steel Products | Kinzers | PA | — | ◇ UNVERIFIED |
| SBSutter Buttes Ag Distribution | Olivehurst | CA | — | ◇ UNVERIFIED |
| SISuwannee Iron Works & Fence, INC. | O Brien | FL | — | ◇ UNVERIFIED |
| SLSwanky LLC | Melba | ID | — | ◇ UNVERIFIED |
| TWTac Welding INC | Bend | OR | — | ◇ UNVERIFIED |
| TMTalley Metal Fabrication | San Jacinto | CA | — | ◇ UNVERIFIED |
| TITandem Inductries LLC | Boulder City | NV | — | ◇ UNVERIFIED |
| TITandem Industries, LLC. | Las Vegas | NV | — | ◇ UNVERIFIED |
| TOTango Ornamental Iron Works | Muskogee | OK | — | ◇ UNVERIFIED |
| TATaylors Auto Salvage | Saint Louis | MO | — | ◇ UNVERIFIED |
| TATc American Crane Company | Waite Park | MN | — | ◇ UNVERIFIED |
| TATc American Monorail Incorporated | Waite Park | MN | — | ◇ UNVERIFIED |
| TLTdoe, LLC | Brunswick | OH | — | ◇ UNVERIFIED |
| TLTeledynamics, LLC | Towaco | NJ | — | ◇ UNVERIFIED |
| TLTeledynamics, LLC | Towaco | NJ | — | ◇ UNVERIFIED |
| TMTelepole Manufacturing Inc | Muncy | PA | — | ◇ UNVERIFIED |
| TUTerex Utilities | Waukesha | WI | — | ◇ UNVERIFIED |
| TUTerex Utilities INC Dba Terex Services | Charleston | WV | — | ◇ UNVERIFIED |
| TUTermaco USA INC. | Reading | PA | — | ◇ UNVERIFIED |
| TFTerry Ferrell/agent for Service | Vallejo | CA | — | ◇ UNVERIFIED |
| TMTexas Metal Tech | Houston | TX | — | ◇ UNVERIFIED |
| TOTexas Ornamental Iron, LTD. | Amarillo | TX | — | ◇ UNVERIFIED |
| TATfn Architectural Signage INC | Santa Ana | CA | — | ◇ UNVERIFIED |
| TBThe Brown Box LLC | Erie | CO | — | ◇ UNVERIFIED |
| TDThe Donald H. Shaw Welding & Iron Works, INC. | Annapolis | MD | — | ◇ UNVERIFIED |
| TGThe G-s Associates CO | Dundalk | MD | — | ◇ UNVERIFIED |
| TIThe Iron Shop | Venice | FL | — | ◇ UNVERIFIED |
 The Metal Shop | Dunnellon | FL | — | ◇ UNVERIFIED |
| TTTheme Tech Corporation | Phoenix | AZ | — | ◇ UNVERIFIED |
| TCThemetech Custom Components INC. | Phoenix | AZ | — | ◇ UNVERIFIED |
