| LCLoren Cook Co-barnes St Plant | Springfield | — | ◇ UNVERIFIED |
 Lowell Manufacturing | Saint Louis | — | ◇ UNVERIFIED |
| MLMachine Laboratory LLC | Chesterfield | — | ◇ UNVERIFIED |
| MIMammoth INC | Springfield | — | ◇ UNVERIFIED |
| MTMapp Technologies, L.l.c. | Joplin | — | ◇ UNVERIFIED |
| MBMar Bal INC | Cuba | — | ◇ UNVERIFIED |
| MMMarmic Metal Treating | Saint Charles | — | ◇ UNVERIFIED |
| MTMarquette Tool & Die | St. Louis | — | ◇ UNVERIFIED |
| MTMast Technology | Independence | — | ◇ UNVERIFIED |
| MSMerit Specialities-merit Specialities | St. Louis | — | ◇ UNVERIFIED |
| MRMetal Recovery Sys INC | Saint Louis | — | ◇ UNVERIFIED |
| MPMid-america Precision Products LLC | Joplin | — | ◇ UNVERIFIED |
| MHMidwest Hanger CO | Kansas City | — | ◇ UNVERIFIED |
| MHMidwest Hanger Company | Cameron | — | ◇ UNVERIFIED |
| MEMissouri Equipment Company | Saint Louis | 20–99 | ◇ UNVERIFIED |
| MFMissouri Forge, INC | Doniphan | — | ◇ UNVERIFIED |
| MMMontgomery Metal Craft INC | Springfield | — | ◇ UNVERIFIED |
| MCMulti-craft Contractors INC | Springfield | — | ◇ UNVERIFIED |
| MPMvp Painting | Harrisonville | — | ◇ UNVERIFIED |
| NCNooter Corp-nooter CORP | St. Louis | — | ◇ UNVERIFIED |
| NCNorthland Coating Solutions | Kearney | — | ◇ UNVERIFIED |
| OIOcci INC. Wwtp | Fulton | — | ◇ UNVERIFIED |
| OOrtech | Kirksville | — | ◇ UNVERIFIED |
| PWPalmyra Water Plant | Palmyra | — | ◇ UNVERIFIED |
| PHParker Hannifin CORP Sporlan Valve Div Plant 1 | Washington | — | ◇ UNVERIFIED |
| PHParker Hannifin Sporlan Div - Plant #2 | Washington | — | ◇ UNVERIFIED |
| PSPathfinder Systems INC | Kansas City | — | ◇ UNVERIFIED |
| PCP C Plating | Fenton | — | ◇ UNVERIFIED |
| PIPohlman Inc-pohlman INC | Chesterfield | — | ◇ UNVERIFIED |
| PQPrecision Quality INC | Lees Summit | — | ◇ UNVERIFIED |
| PRPress Room Equipment CO LLC | Springfield | — | ◇ UNVERIFIED |
| PPPurolator Products INC | Dexter | — | ◇ UNVERIFIED |
| QFQuality Finishing Industries INC | Kansas City | — | ◇ UNVERIFIED |
| QSQuality Sandblasting | Valley Park | — | ◇ UNVERIFIED |
| QCQualserv CORP - Kansas City Div | Kansas City | — | ◇ UNVERIFIED |
| RIRimco INC - Scrap Metal | Saint Louis | — | ◇ UNVERIFIED |
| RLRklep LLC Dba Ultra Clean Midwest | St Joseph | — | ◇ UNVERIFIED |
| RHRock Hill Mechanical Corporation - Macon | Macon | — | ◇ UNVERIFIED |
| SIScore, INC. | Pevely | — | ◇ UNVERIFIED |
| SCScroll Compressors LLC Emerson Climate Tech-warehouse | Lebanon | — | ◇ UNVERIFIED |
| SISemco Incorporated Chillicothe | Chillicothe | — | ◇ UNVERIFIED |
| SISibley Industries INC | Anderson | — | ◇ UNVERIFIED |
| SRSiegel Robert Plating-siegel Robert Plating | St. Louis | — | ◇ UNVERIFIED |
| SCSilgan Containers Manufacturing CORP | Mount Vernon | — | ▲ REPORTED CLOSED |
| SESnyder Equipment a Division of New York Air Brake LLC | Springfield | — | ◇ UNVERIFIED |
| SVSouth Valley Mfg | Springfield | — | ◇ UNVERIFIED |
| SBStar Brite Plating-joplin | Joplin | — | ◇ UNVERIFIED |
| SLSt Louis (ex) Army Ammunition Plant | St Louis | — | ◇ UNVERIFIED |
| SLSt. Louis Metallizing Company | St. Louis | — | ◇ UNVERIFIED |
| SLSt Louis Plating Company Inc-st Louis Plating Company INC | St. Louis | — | ◇ UNVERIFIED |
