| SBSentinel Building Systems | Albion | NE | — | ◇ UNVERIFIED |
| SSShamrock Steel Sales, INC. | Odessa | TX | — | ◇ UNVERIFIED |
| SMSharp Machining & Polishing, Inc. | Kenosha | WI | — | ◇ UNVERIFIED |
| SDShed Depot & Shed Guy Services INC. | Ocala | FL | — | ◇ UNVERIFIED |
| SSShelter Solutions LLC | Albuquerque | NM | — | ◇ UNVERIFIED |
| SSSinger Safety Company | Chicago | IL | — | ◇ UNVERIFIED |
 Skyline Steel, INC. | Chandler | AZ | — | ◇ UNVERIFIED |
 Sky Rider Equipment CO INC | Anaheim | CA | — | ◇ UNVERIFIED |
| Sky Rider Equipment CO INC | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| SISme Industries, INC. | Chubbuck | ID | — | ◇ UNVERIFIED |
| SSSmith System Manfacturing CO | Princeton | MN | — | ◇ UNVERIFIED |
| STSms Technical Services LLC Taylor Division | Taylor | MI | — | ◇ UNVERIFIED |
| SMSola Model/z Facility 1 LLC | Los Angeles | CA | — | ◇ UNVERIFIED |
| SCSoutheastern Canopies, INC | Locust Grove | GA | — | ◇ UNVERIFIED |
| SOSoutheastern Outdoor Products, Incorporated | Clinton | NC | — | ◇ UNVERIFIED |
| SMSouthland Manufacturing INC | Douglasville | GA | — | ◇ UNVERIFIED |
 Southwest Mobile Storage INC | San Diego | CA | — | ◇ UNVERIFIED |
| SFSpecialty Frabricators and Erectors, INC. | Hammond | LA | — | ◇ UNVERIFIED |
| SFSpeeler Foundations INC. | Clearwater | FL | — | ◇ UNVERIFIED |
| SBStar Building (formerly Ceco Buildings) | Lockeford | CA | — | ◇ UNVERIFIED |
| SBStar Building Sys | Elizabethton | TN | — | ◇ UNVERIFIED |
| SCStarcco Company, INC. | Maryland Heights | MO | — | ◇ UNVERIFIED |
| SSStarflite Systems INC. | Connoquenessing | PA | — | ◇ UNVERIFIED |
| SSStarflite Systems INC. | Saxonburg | PA | — | ◇ UNVERIFIED |
| SSStar Storage Solutions LLC | Lafayette | IN | — | ◇ UNVERIFIED |
| SSStar Storage Solutions LLC | Lafayette | IN | — | ◇ UNVERIFIED |
| SBSteel Buildings and Structures | Mount Airy | NC | — | ◇ UNVERIFIED |
| SCSteel Cell of North America INC. | Cornelia | GA | — | ◇ UNVERIFIED |
| SMSteel & Metal Systems, INC. | Blackshear | GA | — | ◇ UNVERIFIED |
| SSSteelox Systems, INC. | Washington Court House | OH | — | ◇ UNVERIFIED |
| SCSteelstar Corporation | Dacono | CO | — | ◇ UNVERIFIED |
| STSteel Tech Industrial CORP | Corona | CA | — | ◇ UNVERIFIED |
| SRStephanus Rudolf Lemmer | Waverly | GA | — | ◇ UNVERIFIED |
| SBSterling Boiler and Mechanical, INC. | Evansville | IN | — | ◇ UNVERIFIED |
| SPStone Perforating | Chicago | IL | — | ◇ UNVERIFIED |
| SUStructures Unlimitied INC. | Bow | NH | — | ◇ UNVERIFIED |
| SOStruXure Outdoor, Inc. | Dahlonega | GA | — | ◇ UNVERIFIED |
| SLSunFlower LLC | Gilmanton Iron Works | NH | — | ◇ UNVERIFIED |
| SMSunrooms & More Design Center INC. | Oklahoma City | OK | — | ◇ UNVERIFIED |
| SCSunspot Carports & Patio | Claremore | OK | — | ◇ UNVERIFIED |
| SWSuper Welding of Southern California INC | Chula Vista | CA | — | ◇ UNVERIFIED |
| TAT. A. Pelsue Company | Englewood | CO | — | ◇ UNVERIFIED |
| TATaylor and Sons Pipe and Steel | Chickasha | OK | — | ◇ UNVERIFIED |
| TCTaylord Containers | Spokane Valley | WA | — | ◇ UNVERIFIED |
| TLTeam Logistics Services | Oceanside | CA | — | ◇ UNVERIFIED |
| TSTech-fab Structural Steel, LLC | Vandalia | MO | — | ◇ UNVERIFIED |
| TSTehran Sanaat INC | San Bernardino | CA | — | ◇ UNVERIFIED |
| TBTerry Building CO. | Oklahoma City | OK | — | ◇ UNVERIFIED |
| TITeton International | Casper | WY | — | ◇ UNVERIFIED |
| TBTexas Building Center | Kingsland | TX | — | ◇ UNVERIFIED |
