| SSSouthern Structural Steel, INC. | Chesapeake | VA | — | ◇ UNVERIFIED |
| SSSouthern Structural Steel Incorporated | Smithfield | VA | — | ◇ UNVERIFIED |
| SSSouthern Structural Steel of Fl, INC | Saint Petersburg | FL | — | ◇ UNVERIFIED |
| SFSouth Florida Aluminum INC. | Lake Worth | FL | — | ◇ UNVERIFIED |
| SFSouthland Fabricators, LLC | Walker | LA | — | ◇ UNVERIFIED |
| SSSouth Shore Iron Works | Chicago | IL | — | ◇ UNVERIFIED |
| SSSouth Sligo Compressor Station | Sligo | LA | — | ◇ UNVERIFIED |
| STSouth Texas Steel Service Company LLC | Victoria | TX | — | ◇ UNVERIFIED |
| SVSouth Valley Mfg | Springfield | MO | — | ◇ UNVERIFIED |
| SHSouthwestern Hollow Metal | Raton | NM | — | ◇ UNVERIFIED |
| SFSouthwest Fabricators | Hugo | OK | — | ◇ UNVERIFIED |
| SSSouthwest Steel Fabrication LLC | Kansas City | MO | — | ◇ UNVERIFIED |
| SSSouthwest Steel, Llc, a Nevada Limited Liability Company | El Mirage | AZ | — | ◇ UNVERIFIED |
| SSSpace System/loral, LLC (bldg #12) | Palo Alto | CA | — | ◇ UNVERIFIED |
| SWSpanier Welding & Metal Fabrication INC | Paynesville | MN | — | ◇ UNVERIFIED |
| SMSparhawk Metals, INC. | Lockwood | NV | — | ◇ UNVERIFIED |
| SESpd Electrical Systems | Philadelphia | PA | — | ◇ UNVERIFIED |
| S5Spec 5 Steel INC | San Jose | CA | — | ◇ UNVERIFIED |
| SISpecht Industries,inc | Santa Clarita | CA | — | ◇ UNVERIFIED |
| SWSpecialized Welders | Torrance | CA | — | ◇ UNVERIFIED |
| SPSpecial Products Energy | Canton | MA | — | ◇ UNVERIFIED |
| SFSpecialty Fittings CORP | Blaine | MN | — | ◇ UNVERIFIED |
| SMSpecialty Maint & Construction | Lakeland | FL | — | ◇ UNVERIFIED |
| SMSpecialty Manufacturing | Amesbury | MA | — | ◇ UNVERIFIED |
| SMSpecialty Metals Fabrication INC | Santee | CA | — | ◇ UNVERIFIED |
| SSSpecialty Steel Fabricators | Olympia | WA | — | ◇ UNVERIFIED |
| SISpecsys INC | Prentice | WI | — | ◇ UNVERIFIED |
| SISpengler Industries | Salt Lake City | UT | — | ◇ UNVERIFIED |
| SCSpf Corporation of America | Houston | TX | — | ◇ UNVERIFIED |
| SSSpherion Staffing Services | Little Rock | AR | — | ◇ UNVERIFIED |
| SPSpika Properties, LLC | Lewistown | MT | — | ◇ UNVERIFIED |
| SISpinweld, INC. | Waukesha | WI | — | ◇ UNVERIFIED |
| SFSpirit Fabs, INC. | Green Bay | WI | — | ◇ UNVERIFIED |
| SOSpm Oil & Gas - Fort Lupton | Fort Lupton | CO | — | ◇ UNVERIFIED |
| SSSportsman Steel Safe Fabricating CO | Long Beach | CA | — | ◇ UNVERIFIED |
| SDSpot Design LLC | Ann Arbor | MI | — | ◇ UNVERIFIED |
| SESpring Engineers of Dallas Dba Sei Metalforms | Dallas | TX | — | ◇ UNVERIFIED |
| SDSpx Dock Prods | Carrollton | TX | — | ◇ UNVERIFIED |
| SDSquare D | El Paso | TX | — | ◇ UNVERIFIED |
| SDSquare D Laser Response Center | Fairfield | CA | — | ◇ UNVERIFIED |
| SLSrf LLC | Fredericksburg | VA | — | ◇ UNVERIFIED |
| SISr Iron INC | Healdsburg | CA | — | ◇ UNVERIFIED |
| SCSs Custom Fabrication, LLC | Redfield | AR | — | ◇ UNVERIFIED |
| SSS & S International, INC. | Carol Stream | IL | — | ◇ UNVERIFIED |
| SSS & S International, INC. of Illinois | Carol Stream | IL | — | ◇ UNVERIFIED |
| SSS & S Metal Fabricators | Chamois | MO | — | ◇ UNVERIFIED |
| SSS & S Midwest Fabricating, LLC | Morris | IL | — | ◇ UNVERIFIED |
| SLSt2 LLC | Placentia | CA | — | ◇ UNVERIFIED |
| SSStaley Steel | Frisco | TX | — | ◇ UNVERIFIED |
| SIStandard Iron, INC. | Chattanooga | TN | — | ◇ UNVERIFIED |
| SIStandard Iron - Wire Works INC | Sauk Centre | MN | — | ◇ UNVERIFIED |
 Standard Machine Company, LLC | Scarborough | ME | — | ◇ UNVERIFIED |
| SSStandard Steel Fabricating CO INC | Seattle | WA | — | ◇ UNVERIFIED |
| SRStanek Rack CO INC | Detroit | MI | — | ◇ UNVERIFIED |
| SHStarline Holdings LLC | Canonsburg | PA | — | ◇ UNVERIFIED |
| SIStarterpanel INC. | Machesney Park | IL | — | ◇ UNVERIFIED |
| SOState of the Arc Welding LLC | Elba | NY | — | ◇ UNVERIFIED |
 States Manufacturing | Maple Grove | MN | — | ◇ UNVERIFIED |
| States Manufacturing CORP | Minneapolis | MN | — | ◇ UNVERIFIED |
| SWState Welding & Fabricating, INC. | Wallingford | CT | — | ◇ UNVERIFIED |
| SISteelcad Industrial Services, INC. | Cutler | IL | — | ◇ UNVERIFIED |
| SCSteel City, INC. | Inlet Beach | FL | — | ◇ UNVERIFIED |
| SCSteel City Metal INC | Sterrett | AL | — | ◇ UNVERIFIED |
| SISteelco INC | Bloomington | CA | — | ◇ UNVERIFIED |
| SISteelco, INC. | Matthews | NC | — | ◇ UNVERIFIED |
| SISteelcon INC. | Brighton | CO | — | ◇ UNVERIFIED |
| SCSteel Construction Services | Napa | CA | — | ◇ UNVERIFIED |
| SUSteelCo U.S.A | Chino | CA | — | ◇ UNVERIFIED |
| SCSteel Creations LLC | Saint George | UT | — | ◇ UNVERIFIED |
| SDSteel Dimensions | Erie | MI | — | ◇ UNVERIFIED |
| SESteel Erectors, INC. | Savannah | GA | — | ◇ UNVERIFIED |
| SESteel Erectors, INC. | Savannah | GA | — | ◇ UNVERIFIED |
 Steele Solutions INC | Milwaukee | WI | — | ◇ UNVERIFIED |
| Steele Solutions INC | Franklin | WI | — | ◇ UNVERIFIED |
 Steel Fab Enterprises Inc/pequea | Lancaster | PA | — | ◇ UNVERIFIED |
| SFSteel Fab INC | Jackson | TN | — | ◇ UNVERIFIED |
 Steelfab, INC. | Rock Hill | SC | — | ◇ UNVERIFIED |
| Steelfab, INC. | Charlotte | NC | — | ◇ UNVERIFIED |
| Steelfab, INC. | Dublin | GA | — | ◇ UNVERIFIED |
| Steelfab Inc., Alabama | Roanoke | AL | — | ◇ UNVERIFIED |
| SFSteel Fabricators, INC. | Fort Collins | CO | — | ◇ UNVERIFIED |
| SFSteel Fabricators L.l.c. | Fort Lauderdale | FL | — | ◇ UNVERIFIED |
| SGSteel Girder LLC | Coolidge | AZ | — | ◇ UNVERIFIED |
 Steelhead Metal & Fab LLC | Salem | OR | — | ◇ UNVERIFIED |
| SKSteel King Industries, INC. | Aurora | IL | — | ◇ UNVERIFIED |
| SPSteel Painters INC | Kelso | WA | — | ◇ UNVERIFIED |
| SSSteel Services Storage Building | Indianapolis | IN | — | ◇ UNVERIFIED |
| SSSteel Specialties LLC | Point Pleasant | WV | — | ◇ UNVERIFIED |
| SSSteel Specialty Company of Belmont, INC. | Belmont | NC | — | ◇ UNVERIFIED |
| SSSteel Structures America, INC | Berthoud | CO | — | ◇ UNVERIFIED |
| SSSteel Structures of Ohio, LLC (1677010316) | Akron | OH | — | ◇ UNVERIFIED |
| STSteel Tech Division | Piscataway | NJ | — | ◇ UNVERIFIED |
| STSteel Tech Enterprises INC | Woodburn | OR | — | ◇ UNVERIFIED |
| SVSteel Ventures INC | Wurtland | KY | — | ◇ UNVERIFIED |
| SISteelway International, L.l.c. | Terrell | TX | — | ◇ UNVERIFIED |
| SISteelway International, LLC | Terrell | TX | — | ◇ UNVERIFIED |
| SISteelwind Industries, Inc | Oak Creek | WI | — | ◇ UNVERIFIED |
| SESteelworks Etc, INC | Oxnard | CA | — | ◇ UNVERIFIED |
| SFSteelworx Fabrication | Northridge | CA | — | ◇ UNVERIFIED |
| SSStephen Sera Studio | Richmond | CA | — | ◇ UNVERIFIED |
