| AIAztec Industries INC | Richland | MS | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| BABabcock and Wilcox Company | West Point | MS | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| BCBag Connection LLC | Ruleville | MS | Paper Manufacturing322223 | — | ◇ UNVERIFIED |
| BCBakelite Chemicals LLC | Taylorsville | MS | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| BEBaldor Electric Company | Columbus | MS | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| BPBaldwin Piano and Organ Company | Greenwood | MS | Miscellaneous Manufacturing339992 | — | ◇ UNVERIFIED |
| BAB and B Concrete Company INC | New Albany | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BAB and B Concrete Company Inc, Fulton Division | Fulton | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BAB and B Concrete Company Inc, Ripley | Ripley | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BAB and B Concrete Company Inc, South Fulton | Fulton | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BFBassco Foam Incorporated | Tupelo | MS | Plastics and Rubber Products Manufacturing326150 | — | ◇ UNVERIFIED |
| BABatesville American Manufacturing Company | Batesville | MS | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| BMBatesville Manufacturing Inc, Batesville | Batesville | MS | Miscellaneous Manufacturing339995 | — | ◇ UNVERIFIED |
| BIBaymont INC | Golden | MS | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| BCBayou Concrete LLC Bay St Loui | Bay Saint Louis | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BCBayou Concrete Llc, Biloxi | Biloxi | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BCBayou Concrete Llc, Firetower Road Plant | Pass Christian | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BCBayou Concrete Llc, Ocean Springs | Ocean Springs | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BCBayou Concrete Llc, Port Bienville | Pearlington | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BLBazor Lumber Company LLC | Quitman | MS | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| BIBekaert INC | Clarksdale | MS | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| BFBelmont Fiberglass INC | Belmont | MS | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| BRBenchcraft, Ripley Facilities | Ripley | MS | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| BGBerry Global | Hattiesburg | MS | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| BEBest Equipment Technologies INC | Poplarville | MS | Machinery Manufacturing333120 | — | ◇ UNVERIFIED |
| BFBest Foam INC | Sherman | MS | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| BBBig Bee Metal Manufacturing Company INC | Tremont | MS | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| BPBiglane Paving, Soso Asphalt Plant | Soso | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BEBlacklidge Emulsions INC | Gulfport | MS | Petroleum and Coal Products Manufacturing324110 | — | ◇ UNVERIFIED |
| BSBlain Sand and Gravel Inc, Crystal Springs Bailey Road | Crystal Springs | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BFBluefire Fulton Renewable Energy LLC | Fulton | MS | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| BSBlue Springs Division of B and B Concrete Company INC | Blue Springs | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BPBond Paving Company Inc, Gulfport | Gulfport | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BBBoral Bricks INC | Macon | MS | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| BSBrandsafway Solutions Llc, Moss Point | Moss Point | MS | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| BTBrimmer Turan Foundry and Machine Shop | Gulfport | MS | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| BCBrinkmann Corporation, the | Olive Branch | MS | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
 Brintons US Axminster INC | Greenville | MS | Textile Product Mills314110 | — | ◇ UNVERIFIED |
| BIBritton Industries, LLC | Eupora | MS | Furniture and Related Product Manufacturing337000 | — | ◇ UNVERIFIED |
| BCBrookhaven Chip Mill | Bogue Chitto | MS | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| BFBrookwood Furniture Company Inc, Bruce | Bruce | MS | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| BSBuckhaults Sawmill and Pallets INC | Ellisville | MS | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| BMBuilder's Marble, INC. | Jackson | MS | Plastics and Rubber Products Manufacturing326191 | — | ◇ UNVERIFIED |
| BNBunge North America, Incorporated | Marks | MS | Food Manufacturing311222 | — | ◇ UNVERIFIED |
| BPBurrows Paper Corporation | Pickens | MS | Paper Manufacturing322121 | — | ◇ UNVERIFIED |
| BCBush Construction | Mclain | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| CVCam2 Vicksburg Lube Oil Blending Plant | Vicksburg | MS | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| CICana INC | North Carrollton | MS | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| CMCappaert Manufactured Housing, Cappaert Rubbish Landfill | Vicksburg | MS | Wood Product Manufacturing321991 | — | ◇ UNVERIFIED |
| CCCareys Construction Company INC | Jackson | MS | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
