J. K. Pulley Company, INC. | Saint Louis | 20–99 | ● ACTIVE |
Precision Components & Assemblies, INC | Saint Peters | 1–19 | ● ACTIVE |
| SSStahl Specialty Co-warrensburg Plant | Warrensburg | 20–99 | ● ACTIVE |
| SBStupp Bros., INC. | Saint Louis | 20–99 | ● ACTIVE |
The Carondelet Foundry Corporation | Pevely | — | ● ACTIVE |
| TMToyota Motor Mfg Missouri INC | Troy | 500+ | ● ACTIVE |
Alpha Foundry CO | Wright City | — | ● ACTIVE |
Arch Enterprises, INC | Mexico | — | ● ACTIVE |
Tier Rack LLC | Ballwin | — | ● ACTIVE |
Grimco INC | Saint Louis | — | ● ACTIVE |
O'fallon Casting, L.l.c. | O Fallon | — | ● ACTIVE |
Pier Tech LLC | Chesterfield | — | ● ACTIVE |
Pittsburgh Pipe & Supply CORP. | Saint Louis | — | ● ACTIVE |
Schoellhorn - Albrecht Machine CO INC | Saint Louis | — | ● ACTIVE |
| BMBull Moose Tube | Gerald | 20–99 | ◐ LIKELY ACTIVE |
| MMMonett Metals INC | Monett | 20–99 | ◐ LIKELY ACTIVE |
| MIMost INC | Troy | 20–99 | ◐ LIKELY ACTIVE |
| OFO'hare Foundry Corporation | Maplewood | 20–99 | ◐ LIKELY ACTIVE |
| PAPermalok - a Northwest Pipe CO | Saint Louis | 1–19 | ◐ LIKELY ACTIVE |
| RARti Advanced Forming INC | Washington | 20–99 | ◐ LIKELY ACTIVE |
| SLSpartan Light Metal Products, L.l.c. | Mexico | 100–499 | ◐ LIKELY ACTIVE |
| WWWireco World Group Sedalia | Sedalia | 100–499 | ◐ LIKELY ACTIVE |
| AMAlubar Metals Missouri LLC | Marston | 100–499 | ◐ LIKELY ACTIVE |
| AFAluminum Finishers LLC - Granby | Granby | — | ◐ LIKELY ACTIVE |
| CCCerro Copper Casting | Mexico | — | ◐ LIKELY ACTIVE |
| CFCerro Flow Products LLC Shelbina | Shelbina | — | ◐ LIKELY ACTIVE |
| DIDelong's Incorporated | Sedalia | — | ◐ LIKELY ACTIVE |
| DRDoe Run Company-buick Mine & Mill | Boss | — | ◐ LIKELY ACTIVE |
| ECEfco Corporation | Monett | — | ◐ LIKELY ACTIVE |
| GEGateway Extrusions | Union | 100–499 | ◐ LIKELY ACTIVE |
| IWInsteel Wire Products | Saint Joseph | 20–99 | ◐ LIKELY ACTIVE |
| KMKoken Manufacturing CO INC | Saint Louis | 20–99 | ◐ LIKELY ACTIVE |
| LCLakeside Casting Solutions | Monroe City | 20–99 | ◐ LIKELY ACTIVE |
Leggett & Platt-wire Mill - Carthage Central Ave | Carthage | — | ◐ LIKELY ACTIVE |
| LNLenco, Nlc INC. | Jackson | — | ◐ LIKELY ACTIVE |
| NINucor-lmp, INC | Maryville | — | ◐ LIKELY ACTIVE |
| RSRmf Steel Products | Grandview | 20–99 | ◐ LIKELY ACTIVE |
| SMSchuylkill Metals Division of Exide CORP | Forest City | — | ◐ LIKELY ACTIVE |
| SSStahl Specialty Company - Kingsville | Kingsville | — | ◐ LIKELY ACTIVE |
| SKStryten Kcmo LLC | Kansas City | — | ◐ LIKELY ACTIVE |
| TDThe Doe Run Company Buick Resource Recycling Facility | Boss | — | ◐ LIKELY ACTIVE |
| ATAero Transportation Products INC Independence Plant | Independence | — | ◐ LIKELY ACTIVE |
| CCConnector Castings | Saint Louis | — | ◐ LIKELY ACTIVE |
| PCPrysmian Cables and Systems Usa, LLC | Sedalia | — | ◐ LIKELY ACTIVE |
| WRWire Rope Corporation of America-chillicothe Plant | Chillicothe | — | ◐ LIKELY ACTIVE |
| CGCtb Grain Systems-ctb Grain Systems | Kansas City | — | ◇ UNVERIFIED |
| CPCupples Prods INC | Union | — | ◇ UNVERIFIED |
| DODawkins On-site, LLC - Missouri Portable Nucor | Sedalia | — | ◇ UNVERIFIED |
| HMHitchiner Manufacturing Company | O Fallon | — | ◇ UNVERIFIED |
| HAHydro Aluminum North America INC | Monett | — | ◇ UNVERIFIED |