| SWSNA - Washington | Washington | 100–499 | ◐ LIKELY ACTIVE |
| SESnyder Engineering, Inc. | Columbia | 20–99 | ◐ LIKELY ACTIVE |
| SSSouth Side Machine Works, Inc. | St. Louis | 20–99 | ◐ LIKELY ACTIVE |
| SSStainless Steel Limited | Miller | 20–99 | ◐ LIKELY ACTIVE |
| SEStatco-DSI Engineering Systems - St. Louis | St. Louis | 20–99 | ◐ LIKELY ACTIVE |
| SEStatco-DSI Engineering Systems - St. Louis | Saint Louis | 20–99 | ◐ LIKELY ACTIVE |
| SCSTLMP Contech Engineered Solutions LLC | Sikeston | 1–19 | ◐ LIKELY ACTIVE |
| SBStupp Bros., Inc | St Louis | 20–99 | ◐ LIKELY ACTIVE |
| TGThe Greenbrier Companies, Jackson | Jackson | 100–499 | ◐ LIKELY ACTIVE |
| UCUltraflo Corporation | Genevieve | 1–19 | ◐ LIKELY ACTIVE |
| UGUniversal Galvanizing | Write | 20–99 | ◐ LIKELY ACTIVE |
| VIVenture Industrial Products, Inc. | Lee's Summit | 20–99 | ◐ LIKELY ACTIVE |
| WPWest Plant | Monett | 100–499 | ◐ LIKELY ACTIVE |
| WWWinco Window | St Louis | 100–499 | ◐ LIKELY ACTIVE |
| YIYarbrough Industries, Inc | Springfield | 20–99 | ◐ LIKELY ACTIVE |
| APA&b Products and Services LLC | Bolivar | 1–19 | ◇ UNVERIFIED |
| ABArchitectural Bronze Studio INC | Saint Louis | 1–19 | ◇ UNVERIFIED |
| AMAssociated Machinists, INC. | Monett | 1–19 | ◇ UNVERIFIED |
| AIAtlas Iron Works | St Louis | 1–19 | ◇ UNVERIFIED |
| BCBeehler CORP | Mountain Grove | — | ◇ UNVERIFIED |
| BFBloomsdale Fabrication & Welding | Bloomsdale | — | ◇ UNVERIFIED |
| BMBoss Metal Fabricators | St Louis | 1–19 | ◇ UNVERIFIED |
| CMCapitol Machine Company INC. | Jefferson City | 1–19 | ◇ UNVERIFIED |
| CACarr & Associates, Inc. | Lebanon | 1–19 | ◇ UNVERIFIED |
| CMCentra Metal LLC | Osage Beach | 1–19 | ◇ UNVERIFIED |
| CJC J Roberds Manufacturing, INC. | Harrisonville | 1–19 | ◇ UNVERIFIED |
| CCCoffman Custom Machine LLC | Grain Valley | 1–19 | ◇ UNVERIFIED |
| CSContract Services Corporation of America | Raytown | 1–19 | ◇ UNVERIFIED |
Creative Machining, LLC | Saint Joseph | — | ◇ UNVERIFIED |
| CSCreative Specialties LLC | Billings | 1–19 | ◇ UNVERIFIED |
| CWCummings Welding INC | St Louis | 1–19 | ◇ UNVERIFIED |
| CECustom Expansion Joints | Liberty | — | ◇ UNVERIFIED |
| CSCustom Steel Manufacturing INC. | Belton | 1–19 | ◇ UNVERIFIED |
| DIDill Industries Inc | Warsaw | 1–19 | ◇ UNVERIFIED |
| DPDi Primo Fabricators INC - Watson Industrial Park | St. Louis | 1–19 | ◇ UNVERIFIED |
| EPEbco Products Corporation | Saint Louis | 20–99 | ◇ UNVERIFIED |
| EMEmpire Machine Works, INC | Raytown | 1–19 | ◇ UNVERIFIED |
| ETEnvision Tech, INC. | Saint Joseph | 1–19 | ◇ UNVERIFIED |
| EGErlbacher Gear & Machine INC. | Cape Girardeau | 1–19 | ◇ UNVERIFIED |
| FSFabricated Structures INC - Belle | Belle | 1–19 | ◇ UNVERIFIED |
| GGGeatley Gates and Fabrications, LLC | House Springs | 1–19 | ◇ UNVERIFIED |
| GCGieske Custom Metal Fabricators | Kansas City | 1–19 | ◇ UNVERIFIED |
| GSGold Star Enterprises INC. | Sikeston | 1–19 | ◇ UNVERIFIED |
| HSHammond Sheet Metal | El Dorado Springs | 20–99 | ◇ UNVERIFIED |
| HSHostetler Sales & Construction LLC | Buffalo | — | ◇ UNVERIFIED |
| HHubzco | Saint Louis | 1–19 | ◇ UNVERIFIED |
| IMIdeal Machine & Tool CO. | Foley | 1–19 | ◇ UNVERIFIED |
| ISInterlock Steel Structures U.s.a. INC. | Saint Joseph | 20–99 | ◇ UNVERIFIED |
| ITIron Tiger Manufacturing | Sedalia | — | ◇ UNVERIFIED |
| JMJerry's Metal Finishing | Saint Clair | 20–99 | ◇ UNVERIFIED |