| MCMagna Cosma International | Liberty | MO | Fabricated Metal Product Manufacturing332510 | — | ◇ UNVERIFIED |
| MLMagna Lmv Automotive Systems | Liberty | MO | Fabricated Metal Product Manufacturing332510 | — | ◇ UNVERIFIED |
| MIManmark, INC. | Saint Louis | MO | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| MIManpower, INC. | Neosho | MO | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| MUMaricorp Us, LLC | Shell Knob | MO | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
| MCMARSfarm Corporation | Overland | MO | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
 Mast Technologies, INC | Independence | MO | Fabricated Metal Product Manufacturing332993 | — | ◇ UNVERIFIED |
| MMMatrix Manufacturing, INC. | Springfield | MO | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| MMMatthews Manufacturing INC. | Saint Louis | MO | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| MSM.b. Sturgis INC. | Maryland Heights | MO | Fabricated Metal Product Manufacturing332912 | — | ◇ UNVERIFIED |
| MAMcalester Army Ammunition Plant | Fort Leonard Wood | MO | Fabricated Metal Product Manufacturing332992 | — | ◇ UNVERIFIED |
| MTMcferron Tool and Machine Company | Harrisonville | MO | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MMMcgregor Manufacturing Company | Ozark | MO | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MCMere Capital, LLC dba Czar Weld | House Springs | MO | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| MIMerrill Iron & Steel South | Springfield | MO | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| MCMetal Container Corporation Arnold | Arnold | MO | Fabricated Metal Product Manufacturing332431 | — | ◇ UNVERIFIED |
 Metal Culverts INC. | Jefferson City | MO | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| MFMetal Fabricators of St Louis | Saint Louis | MO | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| MSMetalflex Sales, Inc. | Saint Charles | MO | Fabricated Metal Product Manufacturing332911 | — | ◇ UNVERIFIED |
| MOMetal One LLC | Lees Summit | MO | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| MTMetal Tech Midwest Incorporated | Joplin | MO | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MHMexico Heating Co., INC. | Mexico | MO | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| MSMichael Steiro | Lebanon | MO | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MFMicro Finish & Coating INC. | Kansas City | MO | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MCMid Continent Steel & Wire, INC. | Poplar Bluff | MO | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| MMMidwest Metal Finishing Custom Powder Coating | Saint Joseph | MO | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| MMMidwest Metal Works, LLC | Sparta | MO | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| MSMidwest Steel and Rebar LLC | Seymour | MO | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| MWMidwest Window and Door | Springfield | MO | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| MMMike's Machine Shop | Licking | MO | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MFMissouri Forge INC | Doniphan | MO | Fabricated Metal Product Manufacturing332111 | — | ◇ UNVERIFIED |
| MOMissouri Ornamental Iron Company, INC. | University City | MO | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| MPMissouri Pressed Metals INC. | Sedalia | MO | Fabricated Metal Product Manufacturing332117 | — | ◇ UNVERIFIED |
| MRMissouri Rolling Mill-hazelwood | Hazelwood | MO | Fabricated Metal Product Manufacturing332117 | — | ◇ UNVERIFIED |
| MUMitek USA INC | Saint Charles | MO | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| MMM & M Vehicle CORP | Mexico | MO | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| MDMonet Desauw INC | Fulton | MO | Fabricated Metal Product Manufacturing332216 | — | ◇ UNVERIFIED |
| MGMpp Group of Companies INC. | Kansas City | MO | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| MIMueller Industries, L.L.C. | Saint Louis | MO | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MAMuncy Acquisitions | Kansas City | MO | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| NJNew Joules Engineering INC. | Kansas City | MO | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| NENo-mar Enterprises | Fenton | MO | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| NCNooter Corporation | Saint Louis | MO | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| NANorth American Industries Inc.* | Lampe | MO | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
| NMNortheast Missouri Machine & Pattern CO | Palmyra | MO | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| NGNorthrop Grumman | Independence | MO | Fabricated Metal Product Manufacturing332993 | — | ◇ UNVERIFIED |
| OTOmega Tool CO | Saint Louis | MO | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| OMOn-site Manufactured Buildings LLC | Branson | MO | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
| OAOrbital Atk INC. | Independence | MO | Fabricated Metal Product Manufacturing332993 | — | ◇ UNVERIFIED |
| OBOzark Barge & Dock Service Inc.* | Gravois Mills | MO | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
