| MMMmc Materials Inc, Forest 30301 | Forest | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
 Mmc Materials Inc, Grenada 30514 | Grenada | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Jackson Fortification Street | Jackson | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, Kosciusko 30307 | Kosciusko | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Laurel Plant | Laurel | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, Lincoln County | Brookhaven | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Lumberton Temp Site | Lumberton | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, Newton | Newton | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Oak Grove 30703 | Oak Grove | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, Petal | Petal | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, Port Gibson | Port Gibson | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Sherman Plant | Sherman | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, Sumrall | Sumrall | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, Union 30304 | Union | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Vicksburg Rifle Range Road | Vicksburg | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Waynesboro | Waynesboro | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, West Point Facility | West Point | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, Winona | Winona | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMmc Materials Inc, Yazoo City 30152 | Yazoo | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMM M Flechas Shipyard Company | Pascagoula | MS | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| MMM & M Processing, LLC | Biloxi | MS | Food Manufacturing311712 | — | ◇ UNVERIFIED |
| MJModine Jackson INC | Jackson | MS | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
 Modine Manufacturing Grenada Lal | Grenada | MS | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| MPMsu, Poultry Science Research Center | Oktibbeha County | MS | Food Manufacturing311615 | — | ◇ UNVERIFIED |
| MCMueller Casting CO INC | Fulton | MS | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| NPNational Picture & Frame Company | Greenwood | MS | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| NSNaval Station Pascagoula | Pascagoula | MS | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| NSNeel Schaffer Inc, Jitney Jr Number 617 | Tchula | MS | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| NLNeshoba Lumber LLC | Philadelphia | MS | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| NDNew Dairy Alabama, LLC (formerly Dairy Fresh of Alabama, Llc) | Hattiesburg | MS | Food Manufacturing311411 | — | ◇ UNVERIFIED |
| NPNewell Products | Waynesboro | MS | Textile Product Mills314999 | — | ◇ UNVERIFIED |
| NWNew Way Trucks - the Arsenal | Booneville | MS | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
| NMNidec Motor Corporation | Southaven | MS | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Corporation | Moss Point | MS | Transportation Equipment Manufacturing336411 | — | ◇ UNVERIFIED |
| OCOld Colonial Brick LLC | Corinth | MS | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| OSOmnova Solutions INC | Columbus | MS | Textile Mills313320 | — | ◇ UNVERIFIED |
| OSOne Source Systems LLC | Vicksburg | MS | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| OFOrleans Furniture INC | Columbia | MS | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| OROscar Renda Contracting, Biloxi North Facility | Biloxi | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OAOxford Auxiliary Division of B and B Concrete Company INC | Oxford | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PIPandle Inc, Asphalt Paving Company | Pascagoula | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHParker Hannifin Corporation, Booneville Plant | Booneville | MS | Primary Metal Manufacturing331312 | — | ◇ UNVERIFIED |
| PHParker Hannifin Corporation, Racor Division | Holly Springs | MS | Machinery Manufacturing333996 | — | ◇ UNVERIFIED |
| PEPeavey Electronics Corporation, Plant Number 3 | Meridian | MS | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
| PEPeavey Electronics Corporation, Plant Number 5 | Meridian | MS | Machinery Manufacturing333922 | — | ◇ UNVERIFIED |
| PEPeavey Electronics Corp, Plant Number 7 | Decatur | MS | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
| PEPeavey Electronics Plant 23 | Leakesville | MS | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
| PFPeco Farms of Mississippi Feed Mill | Bay Springs | MS | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| PFPeco Foods of Brooksville, INC | Brooksville | MS | Food Manufacturing311615 | — | ◇ UNVERIFIED |
| PIPemco INC | Pascagoula | MS | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
