Detyens Shipyards INC | N Charleston | 100–499 | ● ACTIVE |
Isringhausen, INC. | Ladson | 100–499 | ● ACTIVE |
Ivs International, INC. | Ladson | 100–499 | ● ACTIVE |
| MVMercedes-benz Vans LLC | Ladson | 500+ | ● ACTIVE |
Tighitco INC. | Ladson | 20–99 | ● ACTIVE |
Innovative Vehicle Solutions LLC | Ladson | 20–99 | ● ACTIVE |
Stevens Towing CO INC | Hollywood | — | ● ACTIVE |
| CSCritical Solutions International, LLC | Mount Pleasant | — | ● ACTIVE |
Safran Electrical & Power Usa, LLC | Ladson | — | ● ACTIVE |
Vesper Advanced Defense Systems, INC | Charleston | — | ● ACTIVE |
Walashek Industrial & Marine INC | North Charleston | — | ● ACTIVE |
| STStevens Towing Company INC | Yonges Island | 20–99 | ◐ LIKELY ACTIVE |
| CTCummins Turbo Technologies - Palmetto Plant | Ladson | — | ◐ LIKELY ACTIVE |
| DSDetyens Shipyard INC. Charleston | North Charleston | — | ◐ LIKELY ACTIVE |
| TBThe Boeing Company | North Charleston | — | ◇ UNVERIFIED |
| ASAmerican Sail INC | Charleston | — | ◐ LIKELY ACTIVE |
| CMCarver Maritime, LLC | North Charleston | — | ◐ LIKELY ACTIVE |
| PCPalmetto Contract Services INC | Mount Pleasant | — | ◐ LIKELY ACTIVE |
| ALAmerican Lafrance CORP | Ladson | — | ◇ UNVERIFIED |
| ATAnnex to Charleston Naval Complex | N Charleston | — | ◇ UNVERIFIED |
| BHBehr Heat Transfer Systems INC | Charleston | — | ◇ UNVERIFIED |
| DSDetyens Shipyards Incorporated | Mount Pleasant | — | ◇ UNVERIFIED |
| LBLegacy Boat Company Incorporated | Charleston | — | ◇ UNVERIFIED |
| UCUS Coast Guard Charleston | Charleston | — | ◇ UNVERIFIED |
| JBJoint Base Charleston, SC (SC006) | Joint Base Charleston | 100–499 | ◐ LIKELY ACTIVE |
Main Industries, Inc - South Carolina | North Charleston | 20–99 | ◐ LIKELY ACTIVE |
| NCNorth Charleston, SC (SC007) | North Clarleston | 500+ | ◐ LIKELY ACTIVE |
| SCSerco - Charleston, SC | North Charleston | 20–99 | ◐ LIKELY ACTIVE |
| ASAmerican Skiff INC | Charleston | 1–19 | ◇ UNVERIFIED |
| IRIfa Rotorion North America LLC | Ladson | 100–499 | ◇ UNVERIFIED |