 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 |
| SFSteel Farmer LLC | Saint Francis | WI | — | ◇ UNVERIFIED |
| SFSteelfast Framing System | Mableton | GA | — | ◇ UNVERIFIED |
| SFSteel Forming Systems INC. | Grand Haven | MI | — | ◇ UNVERIFIED |
| SGSteel Girder LLC | Coolidge | AZ | — | ◇ UNVERIFIED |
 Steelhead Metal & Fab LLC | Salem | OR | — | ◇ UNVERIFIED |
| Steelhead Metal Works | Newark | CA | — | ◇ UNVERIFIED |
| SSSteelhead Seamless Gutters INC | Sacramento | CA | — | ◇ UNVERIFIED |
| SKSteel King Industries, INC. | Aurora | IL | — | ◇ UNVERIFIED |
| SPSteel Painters INC | Kelso | WA | — | ◇ UNVERIFIED |
| SPSteel Partners, LLC | Henderson | NV | — | ◇ UNVERIFIED |
| SPSteel Partners, LLC | Las Vegas | NV | — | ◇ UNVERIFIED |
| SPSteel Partners, LLC | Las Vegas | NV | — | ◇ UNVERIFIED |
| SPSteel Products, INC | Sarasota | FL | — | ◇ UNVERIFIED |
| SMSteelrunner Metal Fabrication LLC | Beaverton | OR | — | ◇ UNVERIFIED |
| SSSteel Services, INC. | Norfolk | VA | — | ◇ UNVERIFIED |
| SSSteel Services Storage Building | Indianapolis | IN | — | ◇ UNVERIFIED |
 Steel Services Supplies | Toa Baja | PR | — | ◇ 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 |
| SISteelworks INC | Trenton | MI | — | ◇ UNVERIFIED |
| SFSteelworx Fabrication | Northridge | CA | — | ◇ UNVERIFIED |
| SMSteffes Metal Products, LLC - Grand Forks West | Grand Forks | ND | — | ◇ UNVERIFIED |
| SMStellar Mold & Tool, INC. | Galesville | WI | — | ◇ UNVERIFIED |
| SSStephen Sera Studio | Richmond | CA | — | ◇ UNVERIFIED |
| SOStephens Ornamental Iron | Marietta | GA | — | ◇ UNVERIFIED |
 Stephens Pipe & Steel, LLC. | Winder | GA | — | ◇ UNVERIFIED |
| SASterling Atm INC | Salt Lake City | UT | — | ◇ UNVERIFIED |
| SDSterling Dula, a Division of Kane Innovations | Erie | PA | — | ◇ UNVERIFIED |
| SSSterling Steel Company | Portland | OR | — | ◇ UNVERIFIED |
| SBStetson Building Products, LLC. | Eldridge | IA | — | ◇ UNVERIFIED |
| SJSteve Johnson Companies | Wichita | KS | — | ◇ UNVERIFIED |
| SWStevens Welding and Fabrication LLC | Eveleth | MN | — | ◇ UNVERIFIED |
| SZSteve Zappetini & Son INC | San Rafael | CA | — | ◇ UNVERIFIED |
 Steward Machine CO. INC Plant 2 | Birmingham | AL | — | ◇ UNVERIFIED |
| SIStewart Industrial | Tell City | IN | — | ◇ UNVERIFIED |
| SIStewart Iron Works LLC | Erlanger | KY | — | ◇ UNVERIFIED |
| SFSt Fabrication | Orting | WA | — | ◇ UNVERIFIED |
| SIStiltz Iron, INC | Clarksville | TN | — | ◇ UNVERIFIED |
| SLSt Lucie County International Airport | Fort Pierce | FL | — | ◇ 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 |
| SRStones River Steel | Miboro | TN | — | ◇ UNVERIFIED |
| SRStoney Ridge Fabricators | Palmerton | PA | — | ◇ UNVERIFIED |
| SSStratford Steel, LLC | Stratford | CT | — | ◇ UNVERIFIED |
| SMStrathmore Machinery INC | Strathmore | CA | — | ◇ UNVERIFIED |
| SSStretch Solutions LLC | Riverside | CA | — | ◇ 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 |
| 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 |
| SWStruthers Wells Corp/warren | Warren | PA | — | ◇ UNVERIFIED |
| SMStryker Metals LLC | Dayton | OH | — | ◇ UNVERIFIED |
| SStucke | Kent | WA | — | ◇ UNVERIFIED |
| SBStupp Bros INC | Richardsville | KY | — | ◇ UNVERIFIED |
| SBStyle By Design Properties, LLC | Beckley | WV | — | ◇ UNVERIFIED |
| SSSuburban Steel Supply Company LLC | Gahanna | OH | — | ◇ UNVERIFIED |
| SSSudden Services Inc, Distribution and Operations Center | Philadelphia | MS | — | ◇ UNVERIFIED |
| SSSukup Steel Structures LLC | Ambridge | PA | — | ◇ UNVERIFIED |
| SSSulphur Sheet Metal & Fabrication, INC. | Sulphur | LA | — | ◇ UNVERIFIED |
| SMSulta Manufacturing Company | Sulphur Springs | TX | — | ◇ UNVERIFIED |
| SCSulzer Chemtech Usa, INC. | Tulsa | OK | — | ◇ UNVERIFIED |
| SSSummit Steel Works CORP | San Jose | CA | — | ◇ UNVERIFIED |
| SUSummit Utility Structures, LLC | Allentown | PA | — | ◇ UNVERIFIED |
| SFSunbelt Fabricator | Steele | AL | — | ◇ UNVERIFIED |
| SFSunburst Fabrications INC | Redmond | OR | — | ◇ UNVERIFIED |
| SESunrise Erectors | Canton | MA | — | ◇ UNVERIFIED |
| SMSunshine Metals | Corona | CA | — | ◇ UNVERIFIED |
| SSSun Steel Company | University Park | IL | — | ◇ UNVERIFIED |
| SSunsteel,llc | Sunnyside | WA | — | ◇ UNVERIFIED |
| SDSuper Duty, INC. | Hot Springs | AR | — | ◇ UNVERIFIED |
| SASuperior Architecture Mfg INC | Bell Gardens | CA | — | ◇ UNVERIFIED |
| SFSuperior Fabrication INC. | Canadian | TX | — | ◇ UNVERIFIED |
| SFSuperior Fabrication, INC | Elk City | OK | — | ◇ UNVERIFIED |
| SFSuperior Fabrication, INC. | Ada | OK | — | ◇ UNVERIFIED |
| SFSuperior Fabrication & Welding LLC | Punta Gorda | FL | — | ◇ UNVERIFIED |
| SFSuperior Fabricators INC | Baldwin | LA | — | ◇ UNVERIFIED |
