| IOINDEVCO Orangeburg | Orangeburg | SC | Plastics and Rubber Products Manufacturing326112 | 20-99 | ◐ LIKELY ACTIVE |
| IMIndustrial Manufacturing Services | Lancaster | SC | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| IPIntegrated Power Services Charleston Service Center | North Charleston | SC | Electrical Equipment, Appliance & Component Manufacturing335312 | 20-99 | ◐ LIKELY ACTIVE |
| IDIonbond - Duncan | Duncan | SC | Fabricated Metal Product Manufacturing332812 | 20-99 | ◐ LIKELY ACTIVE |
| IIPG-Taylors | Taylors | SC | Paper Manufacturing322219 | 20-99 | ◐ LIKELY ACTIVE |
| IIpp | Bennettsville | SC | Transportation Equipment Manufacturing336212 | 20-99 | ◐ LIKELY ACTIVE |
| IWIPS- Water-Tite ProSet Plastics | Spartanburg | SC | Plastics and Rubber Products Manufacturing326191 | 20-99 | ◐ LIKELY ACTIVE |
| ISIVI South, Inc. | Inman | SC | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| JSJackson SC Wheelshop | Jackson | SC | Transportation Equipment Manufacturing336510 | 20-99 | ◐ LIKELY ACTIVE |
| JTJoseph T Ryerson & Son, Inc | Blytheville | SC | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| JAJOST Agriculture | Simpsonville | SC | Machinery Manufacturing333111 | 20-99 | ◐ LIKELY ACTIVE |
Kardex Remstar | West Columbia | SC | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| KGKeys Greenville | Greenville | SC | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| KCkinsouth corporation | Denmark | SC | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| KGKION Group Nexton | Summerville | SC | Machinery Manufacturing333924 | 20-99 | ◐ LIKELY ACTIVE |
| KGKION Group Tradeport | Summerville | SC | Machinery Manufacturing333924 | 20-99 | ◐ LIKELY ACTIVE |
| KTKnapheide Truck Equipment -Charleston | Moncks Corner | SC | Transportation Equipment Manufacturing336211 | 20-99 | ◐ LIKELY ACTIVE |
| KKoops | Greenville | SC | Machinery Manufacturing333248 | 20-99 | ◐ LIKELY ACTIVE |
| KFKoppers Florence | Florence | SC | Wood Product Manufacturing321114 | 20-99 | ◐ LIKELY ACTIVE |
| KRKoppers Rock Hill | Rock Hill | SC | Chemical Manufacturing325180 | 20-99 | ◐ LIKELY ACTIVE |
| KCKostwein Corporation | Greenville | SC | Machinery Manufacturing333248 | 20-99 | ◐ LIKELY ACTIVE |
| LLanxess | Charleston | SC | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| LCLanxess Coropration - Bushy Park Site | Goose Creek | SC | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| LHLapham - Hickey Steel | Fountain Inn | SC | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| L0Lci - 074 | Gaffney | SC | Fabricated Metal Product Manufacturing332321 | 20-99 | ◐ LIKELY ACTIVE |
| LELevy Environmental Services Company dba Charleston Mill Service | Huger | SC | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LSLiberty, SC | Liberty | SC | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| LCLow Country Originals | Ridgeland | SC | Machinery Manufacturing333999 | 20-99 | ◐ LIKELY ACTIVE |
| LDLugoff - Dana Incorporated | Lugoff | SC | Transportation Equipment Manufacturing336350 | 20-99 | ◐ LIKELY ACTIVE |
| LMLyon Metal Roofing Pelzer | Pelzer | SC | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MMMachinery Manufacturing - Hartsville - A500 | Hartsville | SC | Machinery Manufacturing333249 | 20-99 | ◐ LIKELY ACTIVE |
| MMain | Fort Mill | SC | Fabricated Metal Product Manufacturing332321 | 20-99 | ◐ LIKELY ACTIVE |
Main Industries, Inc - South Carolina | North Charleston | SC | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| MSManufacturing Specialties, Inc | Greenville | SC | Machinery Manufacturing333511 | 20-99 | ◐ LIKELY ACTIVE |
| MNMariplast North America | Greer | SC | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| MMMar Mac Construction Products | Mcbee | SC | Fabricated Metal Product Manufacturing332996 | 20-99 | ◐ LIKELY ACTIVE |
| MIMar-Mac Industries, Inc. | Mcbee | SC | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| MMMar Mac Protective Apparel | Mcbee | SC | Apparel Manufacturing315990 | 20-99 | ◐ LIKELY ACTIVE |
| MLMCC Label Fountain Inn, SC | Fountain Inn | SC | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| MTMidland Truss, Inc. | Wagener | SC | Wood Product Manufacturing321214 | 20-99 | ◐ LIKELY ACTIVE |
| MIMillwood, Inc. Florence | Florence | SC | Wood Product Manufacturing321920 | 20-99 | ◐ LIKELY ACTIVE |
| MIMillwood, Inc. Lugoff | Lugoff | SC | Wood Product Manufacturing321920 | 20-99 | ◐ LIKELY ACTIVE |
| MIMillwood, Inc. Simpsonville | Simpsonville | SC | Wood Product Manufacturing321920 | 20-99 | ◐ LIKELY ACTIVE |
| MPMixer & Plant Parts Mfg, LLC | Rock Hill | SC | Machinery Manufacturing333120 | 20-99 | ◐ LIKELY ACTIVE |
| MWMJB Wood Group - Clio | Clio | SC | Wood Product Manufacturing321912 | 20-99 | ◐ LIKELY ACTIVE |
| MMMonitor Manufacturing @ Graniteville | Graniteville | SC | Transportation Equipment Manufacturing336999 | 20-99 | ◐ LIKELY ACTIVE |
| MSMotorola Solutions Inc. | Lexington | SC | Computer and Electronic Product Manufacturing334220 | 20-99 | ◐ LIKELY ACTIVE |
| MIMPW Industrial Water Services, Inc. - Water Georgetown | Andrews | SC | Miscellaneous Manufacturing339999 | 20-99 | ◐ LIKELY ACTIVE |
| MPMulti-Wall Packaging | Greer | SC | Paper Manufacturing322299 | 20-99 | ◐ LIKELY ACTIVE |
| MGMVP Granite | Charleston | SC | Furniture and Related Product Manufacturing337110 | 20-99 | ◐ LIKELY ACTIVE |