| RERepublic Engineered Steel, INC | Naperville | — | ◇ UNVERIFIED |
| RCRockbridge Castings | Rockbridge | — | ◇ UNVERIFIED |
| SCSandwich Casting and Machine | Sandwich | — | ◇ UNVERIFIED |
| SMSipi Metals CORP | Chicago | — | ◇ UNVERIFIED |
| SMS&n Manufacturing & Stl, INC. | Peoria | — | ◇ UNVERIFIED |
| SCSouthwire CO | Flora | — | ◇ UNVERIFIED |
| SLSpartan Light Metal Products / Team Tech | Sparta | — | ◇ UNVERIFIED |
| STStarbrite Technologies Inc., | South Chicago Heights | — | ◇ UNVERIFIED |
| SSSterling Steel CO LLC | Sterling | — | ◇ UNVERIFIED |
| SGSuncoke Gpi LLC | Granite City | — | ◇ UNVERIFIED |
| TSThornton Salvage | Kankakee | — | ◇ UNVERIFIED |
| TMThyssenkrupp Materials NA | Bolingbrook | — | ◇ UNVERIFIED |
| TDTop Die Casting CO | Marengo | — | ◇ UNVERIFIED |
| TMTransMachine MTT Inc. | Aurora | — | ◇ UNVERIFIED |
| TITrialco, INC. | Chicago Heights | — | ◇ UNVERIFIED |
| TFTrio Foundry, INC | Sandwich | — | ◇ UNVERIFIED |
| UHUltimate Highway Sales, INC. | Palos Heights | — | ◇ UNVERIFIED |
| UPUltra Play Systems, INC | Red Bud | — | ◇ UNVERIFIED |
| USUnited States Aluminum CORP. | Cicero | — | ◇ UNVERIFIED |
| USUnited States Pipe & Foundry Company LLC | Naperville | — | ◇ UNVERIFIED |
| UAUS Aluminum | Cicero | — | ◇ UNVERIFIED |
| UDU.s. Department of Labor-osha | Red Bud | — | ◇ UNVERIFIED |
| UDU.s. Department of Labor-osha | Belleville | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | South Elgin | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Plano | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | South Beloit | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Batavia | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Union | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Somonauk | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Galena | — | ◇ UNVERIFIED |
| USUS Scrap Metal CO | Decatur | — | ◇ UNVERIFIED |
| VMViakable Mfg LLC | Lasalle | — | ◇ UNVERIFIED |
| VMViakable Mfg LLC | Lasalle | — | ◇ UNVERIFIED |
| WWWalker Wire & Steel CO | Pontiac | — | ◇ UNVERIFIED |
| WWWalter Wire Edm Service* | Downers Grove | — | ◇ UNVERIFIED |
| WMWheeling Metal Processing, LTD. | Chicago | — | ◇ UNVERIFIED |
| WAWintec Associates, INC. | Northbrook | — | ◇ UNVERIFIED |
| WFWirco Foundry Division | Champaign | — | ◇ UNVERIFIED |
| ZIZekelman Industries Wheatland Tube CO | Chicago | — | ◇ UNVERIFIED |
