Politics and Business magazines
- Sierra On-Line Inc.
- Sierra On-Line, Inc.
- SIFCO Industries, Inc.
- SIG plc
- Sigma-Aldrich
- Sigma-Aldrich Corporation
- Signet Banking Corporation
- Signet Group PLC
- Sikorsky Aircraft Corporation
- Silhouette Brands, Inc.
- Silicon Graphics Incorporated
- Siliconware Precision Industries Ltd.
- Siltronic AG
- SilverPlatter Information Inc.
- Silverstein Properties, Inc.
- Simco S.A.
- Simmons Company
- Simon Property Group Inc.
- Simon Property Group, Inc.
- Simon Transportation Services Inc.