| SCStone Cast, INC. | Houston | TX | — | ◇ UNVERIFIED |
| SDStonemark Designs, Inc. | Huntsville | TX | — | ◇ UNVERIFIED |
| SSStone Specialties, INC. | Lakeland | FL | — | ◇ UNVERIFIED |
| SSStone Spirit, INC. | Orlando | FL | — | ◇ UNVERIFIED |
| SRStones River Steel | Miboro | TN | — | ◇ UNVERIFIED |
| STStone Technology Distributors, INC. | West Palm Beach | FL | — | ◇ UNVERIFIED |
| SAStoneworks Architectural Precast INC | Elk River | MN | — | ◇ UNVERIFIED |
| SOStoneworks of Manatee INC | Bradenton | FL | — | ◇ UNVERIFIED |
| SYStone Yard | San Diego | CA | — | ◇ UNVERIFIED |
| SEStorage Express INC | Fremont | CA | — | ◇ UNVERIFIED |
| SSStratford Steel, LLC | Stratford | CT | — | ◇ UNVERIFIED |
| SCStress Con | Kalamazoo | MI | — | ◇ UNVERIFIED |
| SIStress-con Industries INC | Saginaw | MI | — | ◇ UNVERIFIED |
| SCStrick Corporation | Abbeville | SC | — | ◇ UNVERIFIED |
 Strong Structural Steel, LTD | Pharr | TX | — | ◇ UNVERIFIED |
| SSStruc Steel INC | Spring Valley | CA | — | ◇ UNVERIFIED |
| SBStructall Building Systems, INC. | San Antonio | TX | — | ◇ UNVERIFIED |
| SCStructural Coatings, INC. | Clayton | NC | — | ◇ UNVERIFIED |
| SCStructural Coatings, INC. - Clayton | Clayton | NC | — | ◇ UNVERIFIED |
| SPStructural Plank Industries INC Carroll Shelby | Sebring | FL | — | ◇ UNVERIFIED |
| SPStructural Prestressed Industries INC. | Fort Lauderdale | FL | — | ◇ UNVERIFIED |
| SPStructural Prestressed Industries, INC. | Miami | FL | — | ◇ UNVERIFIED |
| SPStructural Prestressed Industries, INC. | Miami | FL | — | ◇ UNVERIFIED |
| SSStructural Steel Fabricators INC | Stanton | CA | — | ◇ UNVERIFIED |
| SSStructural Steel of Carolina - Hickory Steel | Hickory | NC | — | ◇ UNVERIFIED |
| SSStructural Steel Products Corporation | Clayton | NC | — | ◇ UNVERIFIED |
| SSStructural Steel Services Inc, Plant 3 | Meridian | MS | — | ◇ UNVERIFIED |
| SSStructural Steel Services, Inc., Plant 6 | Meridian | MS | — | ◇ UNVERIFIED |
| SSStructural Steel Services Inc, Plants 1 | Meridian | MS | — | ◇ UNVERIFIED |
| SSStructural Steel Services, Plant 1 | Meridian | MS | — | ◇ UNVERIFIED |
| SFStructure Fabricators | Evansville | IN | — | ◇ UNVERIFIED |
| SMStryker Metals LLC | Dayton | OH | — | ◇ UNVERIFIED |
| SStucke | Kent | WA | — | ◇ UNVERIFIED |
| SBStupp Bros INC | Richardsville | KY | — | ◇ UNVERIFIED |
| SPStur-d Products Company, INC. | Carson | ND | — | ◇ UNVERIFIED |
| SISturdy-lite INC | Bristol | TN | — | ◇ UNVERIFIED |
| SSSuburban Steel Supply Company LLC | Gahanna | OH | — | ◇ UNVERIFIED |
| SISuhor Industries | Shreveport | LA | — | ◇ UNVERIFIED |
| SISuhor Industries | Mountain Grove | MO | — | ◇ UNVERIFIED |
| SISuhor Industries INC | Clackamas | OR | — | ◇ UNVERIFIED |
| SISuhor Industries, INC. | Saint Joseph | MO | — | ◇ UNVERIFIED |
| SISuhor Industries, INC. | Wichita | KS | — | ◇ UNVERIFIED |
| SISuhor Industries, INC. | Moberly | MO | — | ◇ UNVERIFIED |
| SMSukup Manufacturing CO Clear Lake | Clear Lake | IA | — | ◇ UNVERIFIED |
| SSSukup Steel Structures LLC | Ambridge | PA | — | ◇ UNVERIFIED |
| SMSulta Manufacturing Company | Sulphur Springs | TX | — | ◇ UNVERIFIED |
| SCSulzer Chemtech Usa, INC. | Tulsa | OK | — | ◇ UNVERIFIED |
| SASummit Attachment & Machinery, LLC | Kelso | WA | — | ◇ UNVERIFIED |
| SPSummit Precast Concrete Navasota Facility | Navasota | TX | — | ◇ UNVERIFIED |
| SSSummit Steel Works CORP | San Jose | CA | — | ◇ UNVERIFIED |
| SUSummit Utility Structures, LLC | Allentown | PA | — | ◇ UNVERIFIED |
| SCSunbelt Crushing, LLC. | Mobile | AL | — | ◇ UNVERIFIED |
| SCSunbelt Crushing, LLC. | Defuniak Springs | FL | — | ◇ UNVERIFIED |
| SFSunburst Fabrications INC | Redmond | OR | — | ◇ UNVERIFIED |
| SPSuncoast Post-tension LTD | Woodbridge | VA | — | ◇ UNVERIFIED |
| SESunrise Erectors | Canton | MA | — | ◇ UNVERIFIED |
| SMSunshine Metals | Corona | CA | — | ◇ UNVERIFIED |
| SWSunshine Welding | Cape Canaveral | FL | — | ◇ UNVERIFIED |
| SWSunshine Welding-main | Cape Canaveral | FL | — | ◇ UNVERIFIED |
| SSSun Steel Company | University Park | IL | — | ◇ UNVERIFIED |
| SSunsteel,llc | Sunnyside | WA | — | ◇ UNVERIFIED |
| SDSunworks Decorative Concrete LLC | Annville | PA | — | ◇ UNVERIFIED |
| SCSuper Concrete Company Incorporated | Manassas | VA | — | ◇ UNVERIFIED |
| SDSuper Duty, INC. | Hot Springs | AR | — | ◇ UNVERIFIED |
| SASuperior Architecture Mfg INC | Bell Gardens | CA | — | ◇ UNVERIFIED |
| SCSuperior Concrete Products | Birmingham | AL | — | ◇ UNVERIFIED |
| SCSuperior Construction | Winder | GA | — | ◇ UNVERIFIED |
| SFSuperior Fabrication INC. | Canadian | TX | — | ◇ UNVERIFIED |
| SISuperior Industries, LLC | Superior | NE | — | ◇ UNVERIFIED |
| SMSuperior Mason Products LLC | Birmingham | AL | — | ◇ UNVERIFIED |
| SMSuperior Mason Products LLC | Homewood | AL | — | ◇ UNVERIFIED |
| SRSuperior Restoration | Lake Elsinore | CA | — | ◇ UNVERIFIED |
| SSSuperior Steel Connectors Inc | Ronkonkoma | NY | — | ◇ UNVERIFIED |
| SSSuperior Steel Connectors Inc | Bay Shore | NY | — | ◇ UNVERIFIED |
| SSSuperior Suppliers Network, LLC | Houghton | MI | — | ◇ UNVERIFIED |
 Superior Tank CO INC | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| SWSuperior Walls of North Dakota, LLC | Bismarck | ND | — | ◇ UNVERIFIED |
| SWSuperior Wall Systems, LLC | Salisbury | NC | — | ◇ UNVERIFIED |
| SSSuper Steel LLC | Milwaukee | WI | — | ◇ UNVERIFIED |
| SSSuper Steel Products CORP | Milwaukee | WI | — | ◇ UNVERIFIED |
| SMSupreme Manufacutring, INC. | Stoneboro | PA | — | ◇ UNVERIFIED |
| SASustainable Agricultural Technologies INC | Cottage Grove | OR | — | ◇ UNVERIFIED |
| SASutton Agricultural Enterprises, INC. | Salinas | CA | — | ◇ UNVERIFIED |
| SFSweatshop Fabrication | Robstown | TX | — | ◇ UNVERIFIED |
| SASwift-cor Aerospace, INC. | Gardena | CA | — | ◇ UNVERIFIED |
| SCSymons Corp/accessory Products Div | Glenridge | IL | — | ◇ UNVERIFIED |
| SSSymons Steel Forms Div | New Braunfels | TX | — | ◇ UNVERIFIED |
| TITacoma Iron Work | Spanaway | WA | — | ◇ UNVERIFIED |
| TLTaktl, LLC | Glenshaw | PA | — | ◇ UNVERIFIED |
| TITalley Iron Works, LLC | Pearl River | LA | — | ◇ UNVERIFIED |
| TMTalley Metal Products | Hagerstown | MD | — | ◇ UNVERIFIED |
| TITallman Iron Works INC | Maryville | TN | — | ◇ UNVERIFIED |
| TMTalton's Metal Products, INC. | Fuquay Varina | NC | — | ◇ UNVERIFIED |
| TITamer Industries | Somerset | MA | — | ◇ UNVERIFIED |
| TATampa Amalgamated Steel | Tampa | FL | — | ◇ UNVERIFIED |
| TMTandem Metals, INC. | University Park | IL | — | ◇ UNVERIFIED |
| TCTank Connection | Galesburg | KS | — | ◇ UNVERIFIED |
| TCTank Construction & Engineering INC | Fresno | CA | — | ◇ UNVERIFIED |
| TITankinetics INC | Harrision | AR | — | ◇ UNVERIFIED |
| TMTaprite-fassco Mfg., INC. | San Antonio | TX | — | ◇ UNVERIFIED |
