| LRLehman Roberts Company | Robinsonville | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LRLehman Roberts Company, Plant Number 11 | Oxford | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LRLehman Roberts Company - Plant Number 3 | Friars Point | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LRLehman Roberts Company, Plant Number 6 | Hernando | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LRLehman Roberts, Plant 1 | Winona | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LTLetourneau Technologies, INC | Vicksburg | MS | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| LCLexington Concrete and Block Company Inc, Pearl Plant | Pearl | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| LHLexington Homes | Lexington | MS | Wood Product Manufacturing321991 | — | ◇ UNVERIFIED |
| LMLockheed Martin Aeronautical Company | Meridian | MS | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| LMLockheed Martin Information Systems and Global Services | Stennis Space Center | MS | Transportation Equipment Manufacturing336414 | — | ◇ UNVERIFIED |
| LBLouisville Brick Company | Louisville | MS | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
 Lsc Communications Us, LLC | Senatobia | MS | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| LHLucedale Hot Mix Asphalt Plant | Lucedale | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MSMacon Septic Systems Company INC | Macon | MS | Wood Product Manufacturing321114 | — | ◇ UNVERIFIED |
| MTMacon Treating Company | Macon | MS | Wood Product Manufacturing321114 | — | ◇ UNVERIFIED |
| MSMactor Site | Greenville | MS | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| MLMagnolia Lumber CO | Magnolia | MS | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| MTMagnolia Traditions INC | Pascagoula | MS | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| MBMallette Brothers Construction Company INC | Gautier | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MBMallette Brothers Construction Company, Lucedale Asphalt Plant #2 | Lucedale | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MMarconi | Greenville | MS | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| MVMarks Veneer LLC | Marks | MS | Wood Product Manufacturing321211 | — | ◇ UNVERIFIED |
| MTMark Twain Redi Mix Plant | Horn Lake | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MFMason Forest Products INC | Hattiesburg | MS | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| MTMatheson Tri Gas INC | Madison | MS | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| MMMaxim Manufacturing Corporation | Sebastopol | MS | Machinery Manufacturing333112 | — | ◇ UNVERIFIED |
| MCMct Custom Truck Bodies INC | Hernando | MS | Machinery Manufacturing333924 | — | ◇ UNVERIFIED |
| MPMebane Packaging Corporation | Greenville | MS | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| MHMemphis Hardwood Flooring Co, Grenada | Grenada | MS | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| MHMemphis Hardwood Flooring Company, Bentonia Facility | Bentonia | MS | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| MHMemphis Hardwood Flooring Company, Bruce | Bruce | MS | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| MCMetalloy Corp, The, Mississippi Division | Shannon | MS | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| MPMetal Processors INC | Jackson | MS | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| MCMetro Concrete LLC | Biloxi | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMetso Minerals Ind, Stephens Adamson | Clarksdale | MS | Machinery Manufacturing333131 | — | ◇ UNVERIFIED |
| MWMf Wiggins LLC | Wiggins | MS | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| MSMid South Baking Company | Pelahatchie | MS | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| MEMississippi Ethanol LLC | Winona | MS | Chemical Manufacturing325191 | — | ◇ UNVERIFIED |
| MPMississippi Phosphates CORP. | Pascagoula | MS | Chemical Manufacturing325312 | — | ◇ UNVERIFIED |
| MRMississippi River Pulp, LLC | Natchez | MS | Paper Manufacturing322110 | — | ◇ UNVERIFIED |
| MMMmc Materials INC | Madison | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
 Mmc Materials Inc, Brookhaven | Brookhaven | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, Calhoun City | Calhoun City | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, Carthage | Carthage | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Clarksdale Plant | Clarksdale | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, Clinton Plant | Clinton | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Cordova Plant | Byhalia | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Eupora | Eupora | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, Florence | Florence | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| Mmc Materials INC - Forest | Forest | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
