 Lippert Components Plant 151 | Kendallville | IN | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| LGLower Great Lakes Kenworth, INC. Dba Whiteford Trailer & Equ | South Bend | IN | Transportation Equipment Manufacturing336212 | — | ◇ UNVERIFIED |
| LCLsc Communications Crawfordsville South | Crawfordsville | IN | Printing and Related Support Activities323117 | — | ◇ UNVERIFIED |
| LTLucent Technologies Incorporated | Indianapolis | IN | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MUMaax US Corporation | Bremen | IN | Plastics and Rubber Products Manufacturing326191 | — | ◇ UNVERIFIED |
| MPMab Paints, INC | Terre Haute | IN | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| MPMacke Property F/k/a Somers Properties, Llc, and F/k/a B&b Custom Plating | Hoagland | IN | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| MMactac | Columbus | IN | Paper Manufacturing322220 | — | ◇ UNVERIFIED |
| MUMagnequench Ug | Valparaiso | IN | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MPMajestic Products Company | Huntington | IN | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| MSManitex Sabre INC | Knox | IN | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| MHMann & Hummel USA INC. | South Bend | IN | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| MTManual Transmissions of Muncie LLC | Muncie | IN | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| MCMaple City Woodworking Corporation | Goshen | IN | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| MCMarble Creations LLC | Warsaw | IN | Plastics and Rubber Products Manufacturing326191 | — | ◇ UNVERIFIED |
| MWMarble Works of Indiana, INC. | Bloomington | IN | Plastics and Rubber Products Manufacturing326191 | — | ◇ UNVERIFIED |
| MBMarine Builders Incorporated | Utica | IN | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| MSMarion Steel Fabrication Incorporated | Marion | IN | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| MAMartin Animal Bedding LLC | Goshen | IN | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| MIMarvel Industries | Richmond | IN | Electrical Equipment, Appliance & Component Manufacturing335220 | — | ◇ UNVERIFIED |
| MIMar-zane, INC | Indianapolis | IN | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MIMar-zane, INC. | Noblesville | IN | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MSMasco Support Services | Cumberland | IN | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| MCMasonite Corporation | South Bend | IN | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| MCMasterbrand Cabinets INC - Richmond | Richmond | IN | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| MIMasterfab INC | Goshen | IN | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| MPMaster Power Transmission | Columbus | IN | Fabricated Metal Product Manufacturing332991 | — | ◇ UNVERIFIED |
| MMMcgill Manufacturing Company | Valparaiso | IN | Fabricated Metal Product Manufacturing332991 | — | ◇ UNVERIFIED |
| MIMenard Incorporated | Terre Haute | IN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MAMeridian Automotive Systems | Shelbyville | IN | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| MFMetal Forming Industries INC | Russellville | IN | Fabricated Metal Product Manufacturing332114 | — | ◇ UNVERIFIED |
| MAMetals and Additives LLC Warehouse | Brazil | IN | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| MIMetals Investment Trust LTD. | East Chicago | IN | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| MSMetal Source LLC | Wabash | IN | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| MLMetalworking Lubricants CO | Indianapolis | IN | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| MLMetalworking Lubricants Company US Steel Midwest | Portage | IN | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| MNMetaugus Npri | Bloomington | IN | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| MCMid-continent Coal & Coke | Portage | IN | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| MCMid Continent Coal & Coke Company | East Chicago | IN | Petroleum and Coal Products Manufacturing324199 | — | ◇ UNVERIFIED |
| MSMidwestern Steel Fabricators Chicago LLC | Hammond | IN | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| MMMid-west Metal Products | Muncie | IN | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| MMMid-west Metal Products | Muncie | IN | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| MMMidwest Molding, INC. | Wolcottville | IN | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| MPMidwest Pipe Coating | Schererville | IN | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| MTMidwest Tankworks a Div Mississippi Tank CO | Vincennes | IN | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| MCMignone Communications INC | Huntington | IN | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| MCMikes Custom Painting INC | Bremen | IN | Transportation Equipment Manufacturing336213 | — | ◇ UNVERIFIED |
| MAMilestone Av Technologies LLC Dba Dalit | Warsaw | IN | Textile Mills313320 | — | ◇ UNVERIFIED |
| MCMilestone Contractors LP | Lowell | IN | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MCMilestone Contractors LP | Delphi | IN | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
