| MPMajestic Products Company | Huntington | — | ◇ UNVERIFIED |
| MMMa Metal | Edinburgh | — | ◇ UNVERIFIED |
| MTManchester Tank & Equipment CO | Bedford | — | ◇ UNVERIFIED |
| MTManchester Tank & Equipment CO | Elkhart | — | ◇ UNVERIFIED |
| MSManitex Sabre INC | Knox | — | ◇ UNVERIFIED |
| MSMarion Steel Fabrication Incorporated | Marion | — | ◇ UNVERIFIED |
| MPMaster Power Transmission | Columbus | — | ◇ UNVERIFIED |
| MMMcgill Manufacturing Company | Valparaiso | — | ◇ UNVERIFIED |
| MSMetal Spinners | Angola | — | ◇ UNVERIFIED |
| MSMetal Spinners | Angola | — | ◇ UNVERIFIED |
| MAMetl-span a Div of Nci Group INC | Shelbyville | — | ◇ UNVERIFIED |
| MOMicromatic Operations INC | Berne | — | ◇ UNVERIFIED |
| MSMidwestern Steel Fabricators Chicago LLC | Hammond | — | ◇ UNVERIFIED |
| MMMid-west Metal Products | Muncie | — | ◇ UNVERIFIED |
| MPMidwest Pipe Coating | Schererville | — | ◇ UNVERIFIED |
| MTMidwest Tankworks a Div Mississippi Tank CO | Vincennes | — | ◇ UNVERIFIED |
| MIMiller Industrial | Kokomo | — | ◇ UNVERIFIED |
| MPMiller Plating & Metal Finishing LLC | Evansville | — | ◇ UNVERIFIED |
| MWMi Windows & Doors LLC | Brazil | — | ◇ UNVERIFIED |
| MCModineer Coatings Division South | South Bend | — | ◇ UNVERIFIED |
| MMModine Mfg/laporte/pemberville | La Porte | — | ◇ UNVERIFIED |
| MIMor/ryde International INC | Elkhart | — | ◇ UNVERIFIED |
| MSMunster Steel Company | Munster | — | ◇ UNVERIFIED |
| NANapa Auto Parts Machine Shop | Plymouth | — | ◇ UNVERIFIED |
| NTNational Tube Form | Fort Wayne | — | ◇ UNVERIFIED |
| NGNelson Global - Fortune Circle | Indianapolis | — | ◇ UNVERIFIED |
| NINeo Industries Indiana INC | Portage | — | ◇ UNVERIFIED |
| NCNew Castle E-coating Plus | New Castle | — | ◇ UNVERIFIED |
| NWNipg Waterloo | Waterloo | — | ◇ UNVERIFIED |
| NINorthern Indiana Anodize | Fort Wayne | — | ◇ UNVERIFIED |
| OSO'neal Steel, INC. | Indianapolis | — | ◇ UNVERIFIED |
| PIPatrick Industries INC | Bristol | — | ◇ UNVERIFIED |
| PPPenz Products, INC. | Mishawaka | — | ◇ UNVERIFIED |
| PRPlastic Recycling INC | Indianapolis | — | ◇ UNVERIFIED |
| PSPraxair Surface Technologies, INC. | Indianapolis | — | ◇ UNVERIFIED |
| PMPrecise Manufacturing | Fort Wayne | — | ◇ UNVERIFIED |
| PPPrecision Painting Incorporated | Wakarusa | — | ◇ UNVERIFIED |
| PFProductivity Fabricators, INC. | Richmond | — | ◇ UNVERIFIED |
| PQPti Quality Containment Solutions LLC | Jeffersonville | — | ◇ UNVERIFIED |
| QFQuality Frames, INC. | Elkhart | — | ◇ UNVERIFIED |
| QLQuikcut LLC | Fort Wayne | — | ◇ UNVERIFIED |
| RIRaco, INC. | South Bend | — | ◇ UNVERIFIED |
| RARaydar & Associates | Odon | — | ◇ UNVERIFIED |
| RGR G Applegate Steel Company Incorporated | Saratoga | — | ◇ UNVERIFIED |
 Rockwell Automation | Columbus | — | ◇ UNVERIFIED |
| RFRoll Forming Corporation | Jeffersonville | — | ◇ UNVERIFIED |
| RSR & S Plating, Incorporated | Indianapolis | — | ◇ UNVERIFIED |
| SPSchafer Powder Coating, INC. | Carmel | — | ◇ UNVERIFIED |
| SLSchlage Lock Company LLC | Indianapolis | — | ◇ UNVERIFIED |
| SLSchlage Lock Company LLC | Greenfield | — | ◇ UNVERIFIED |
