| LSLenex Steel | Terre Haute | IN | — | ◇ UNVERIFIED |
 Lippert Components | Rialto | CA | — | ◇ UNVERIFIED |
| Lippert Components Twin Falls 64 | Kimberly | ID | — | ◇ UNVERIFIED |
| LSLockport Steel Fabricators | Lockport | IL | — | ◇ UNVERIFIED |
| MSMarshall Steel Incorporated | Memphis | TN | — | ◇ UNVERIFIED |
| MSMatrix Service Fabrication Div | Catoosa | OK | — | ◇ UNVERIFIED |
| MFMetals Fabrication | Airway Heights | WA | — | ◇ UNVERIFIED |
 Meyer Utility Structures, LLC Plant #1662 | Steele | AL | — | ◇ UNVERIFIED |
| MSMica Steelworks Kaufman | Kaufman | TX | — | ◇ UNVERIFIED |
| MWModern Welding CO of Tx | Rhome | TX | — | ◇ UNVERIFIED |
| MOMonotech of Mississippi | Iuka | MS | — | ◇ UNVERIFIED |
| MSMueller Systems | Cleveland | NC | — | ◇ UNVERIFIED |
| NNelco | Houston | TX | — | ◇ UNVERIFIED |
| NLNeofab, LLC | Miami | OK | — | ◇ UNVERIFIED |
| NANew Alenco Windows LTD | Bryan | TX | — | ◇ UNVERIFIED |
| NVNucor Vulcraft Group - Grapeland Div | Grapeland | TX | — | ◇ UNVERIFIED |
| OCOttenweller CO INC | Mount Airy | NC | — | ◇ UNVERIFIED |
| OSOwen Steel Company | Wilmington | DE | — | ◇ UNVERIFIED |
| OWO W Hubbell & Sons | Ny Mills | NY | — | ◇ UNVERIFIED |
| PIPirod INC | Plymouth | IN | — | ◇ UNVERIFIED |
| PSProspect Steel Company | Little Rock | AR | — | ◇ UNVERIFIED |
| QQsi | Dothan | AL | — | ◇ UNVERIFIED |
| RMRockwood Mfg Co/rockwood | Rockwood | PA | — | ◇ UNVERIFIED |
| SISabre Industries Conroe Tx Facility | Conroe | TX | — | ◇ UNVERIFIED |
| SSSamuel Son and Company (usa) INC | Iuka | MS | — | ◇ UNVERIFIED |
| SGSas Global Fka Sure Alloy Steel Corporation | Warren | MI | — | ◇ UNVERIFIED |
| STSauk Technologies | Saukville | WI | — | ◇ UNVERIFIED |
 Schuff Steel | Bellemont | AZ | — | ◇ UNVERIFIED |
| Schuff Steel CO | Eloy | AZ | — | ◇ UNVERIFIED |
| Schuff Steel Company | Stockton | CA | — | ◇ UNVERIFIED |
| SOSfi of Arkansas | Conway | AR | — | ◇ UNVERIFIED |
| S1Shape 1820 | Grand Haven | MI | — | ◇ UNVERIFIED |
| SSSkilcraft Sheetmetal INC | Burlington | KY | — | ◇ UNVERIFIED |
| SASouthern Aluminum Finishing CO Winston Paint | Villa Rica | GA | — | ◇ UNVERIFIED |
 Steelfab of Virginia, INC. | Emporia | VA | — | ◇ UNVERIFIED |
| SFSteel Fabricators of Monroe LLC | Monroe | LA | — | ◇ UNVERIFIED |
| SKSteel King Industries INC | New London | WI | — | ◇ UNVERIFIED |
| SGSt George Steel Fabrication INC | Saint George | UT | — | ◇ UNVERIFIED |
| TSTemtco Steel INC | Chicago | IL | — | ◇ UNVERIFIED |
| TSTemtco Steel Tumwater | Tumwater | WA | — | ◇ UNVERIFIED |
| THTrinity Highway Products LLC | Orangeburg | SC | — | ◇ UNVERIFIED |
| TITrinity Inds Head Div #56 | Navasota | TX | — | ◇ UNVERIFIED |
| TITrinity Industries Plant 26 | Fort Worth | TX | — | ◇ UNVERIFIED |
| TTTrinity Tank Car INC Plt 200 | Longview | TX | — | ◇ UNVERIFIED |
| UIUniversal Industrial Sales Incorporated- Galvanizing Facility | Lindon | UT | — | ◇ UNVERIFIED |
| VCValmont Coatings Oklahoma Galvanizing | Claremore | OK | — | ◇ UNVERIFIED |
| VNValmont Newmark INC | Columbus | NE | — | ◇ UNVERIFIED |
| VNValmont Newmark/west Hazleton | Hazleton | PA | — | ◇ UNVERIFIED |
| WSWalker Stainless Equipment CO | New Lisbon | WI | — | ◇ UNVERIFIED |
| WWWebb Wheel | Cullman | AL | — | ◇ UNVERIFIED |
