| SLSheldon Laboratory Systems, LLC | Crystal Springs | MS | Furniture and Related Product Manufacturing337127 | — | ◇ UNVERIFIED |
| SIShowood INC | Ecru | MS | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| SSS&h Steel Corporation | Pearl | MS | Primary Metal Manufacturing331110 | 1-19 | ◇ UNVERIFIED |
| SLShuqualak Lumber Company Inc, Sawmill Division | Shuqualak | MS | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| SBSierra Building Systems LLC | Jackson | MS | Plastics and Rubber Products Manufacturing326100 | — | ◇ UNVERIFIED |
| SISignal International LLC | Pascagoula | MS | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| SCSimpson County Ready Mix Concrete, Plant Number 6 | Magee | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SCSoutheastern Concrete Company Inc, Collins Facility | Collins | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SCSoutheastern Concrete Company Inc, Plant Number 4 | Hattiesburg | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| STSoutheastern Timber Products - Ackerman Mill | Ackerman | MS | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| SFSouthern Fasteners Company | Greenville | MS | Machinery Manufacturing333513 | — | ◇ UNVERIFIED |
| SFSouthern Fiberglass INC | Tylertown | MS | Plastics and Rubber Products Manufacturing326121 | — | ◇ UNVERIFIED |
| SFSouthern Film and Bag | Summit | MS | Paper Manufacturing322221 | — | ◇ UNVERIFIED |
| SKSouthern Kustom Furniture | Magnolia | MS | Plastics and Rubber Products Manufacturing326191 | — | ◇ UNVERIFIED |
| SSSpeciality Stairs and Miscellaneous Fabrication INC | Pearl | MS | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| SMSpecialty Minerals Inc, Owner, and Specialty Minerals Mississippi Inc, Operator | Brookhaven | MS | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| SRSpencer Ready Mix INC | Jackson | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SCSqwincher Corporation, the | Columbus | MS | Beverage and Tobacco Product Manufacturing312111 | — | ◇ UNVERIFIED |
| SCStion Corporation | Hattiesburg | MS | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| SSStone Shop Llc, the | Picayune | MS | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| STStone Treated Materials | Picayune | MS | Wood Product Manufacturing321114 | — | ◇ UNVERIFIED |
| SUStratford Upholstery Company Llc, the | Eupora | MS | Wood Product Manufacturing321912 | — | ◇ UNVERIFIED |
| SSStructural Steel Services Inc, Plant 3 | Meridian | MS | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| SSStructural Steel Services, Inc., Plant 6 | Meridian | MS | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| SSStructural Steel Services, Plant 1 | Meridian | MS | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| SSSudden Services Inc, Component Rebuild Center | Louisville | MS | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| SSSudden Services Inc, Distribution and Operations Center | Philadelphia | MS | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| SSSudden Services, Remanufacturing Center | Carthage | MS | Machinery Manufacturing333924 | — | ◇ UNVERIFIED |
| SCSunbelt Chemicals INC | Gulfport | MS | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| SSSunbelt Shavings LLC | Shuqualak | MS | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| SDSuper Dry Industries INC | Shuqualak | MS | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| SASuperior Asphalt Inc, Hazlehurst Plant, Copiah County Number 1 | Hazlehurst | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SASuperior Asphalt Inc, Hernando Plant | Hernando | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SASuperior Asphalt Inc, Holmes County Plant Number Two | Pickens | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SASuperior Asphalt Inc, Jackson | Jackson | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SASuperior Asphalt Inc, Louisville | Louisville | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SASuperior Asphalt Inc, Panola County Plant Number One | Batesville | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SASuperior Asphalt Inc, Philadelphia | Philadelphia | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SASuperior Asphalt Inc, Scott County Plant Number One | Forest | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SMSuperior Manufacturing Group | Moselle | MS | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| SSSuper Sagless, Div of Leggett & Platt | Tupelo | MS | Fabricated Metal Product Manufacturing332510 | — | ◇ UNVERIFIED |
| STSureride Trailers INC | Maben | MS | Transportation Equipment Manufacturing336214 | — | ◇ UNVERIFIED |
| SSSxp Schulz Xtruded Products LLC | Hernando | MS | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SMSyltone Marine INC | Gulfport | MS | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| TCTanner Construction Company INC | Prentiss | MS | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| TGTaylor Group Inc, Ackerman | Ackerman | MS | Machinery Manufacturing333517 | — | ◇ UNVERIFIED |
| TMTaylor Machine Works, Philadelphia Operations | Philadelphia | MS | Machinery Manufacturing333924 | — | ◇ UNVERIFIED |
| TPTaylor Power Systems INC | Richland | MS | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| TATci Automotive LLC | Ashland | MS | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| TCTeikuro Corporation | Meridian | MS | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
