- Adornus Manufacturing
- AFL
- Alice Manufacturing Company
- Alpha Sheet Metal Works
- AME Fabrication & Design, LLC
- American Chemistry Council
- A.O. Smith Water Products Company
- Anderson UnderBridge
- Andron Stainless
- Arauco North America
- Ascend Performance Materials, LLC
- AstenJohnson, Inc.
- Atlantic Packaging
- Atlantic Tooling and Fabricating Company
- AVX Corporation
C
S
- SC State Ports Authority
- Sage Automotive
- Samsung
- Santee Cooper
- Sea Hunt Boat MFG Co., Inc.
- Sealed Air Corp
- Secondary Solutions, Inc.
- Shaw Industries Group, Inc.
- Sheriar Press
- Signatures Company, LLC
- Sleep Number
- Solvay
- Sonoco Products Company
- Springs Creative
- Staubli North America
- Suminoe Textile of America
- Synthomer USA LLC