Politics and Business magazines
- Armco Inc.
- Armor All Products Corp.
- Armor Holdings, Inc.
- Armstrong Holdings, Inc.
- Army and Air Force Exchange Service
- Arnold & Porter
- Arnold Clark Automobiles Ltd.
- Arnoldo Mondadori Editor S.p.A.
- Arnott's Ltd.
- ArQule, Inc.
- ARRIS Group, Inc.
- Arriva PLC
- Arrow Air Holdings Corporation
- Arsenal Holdings PLC
- Art Van Furniture, Inc.
- Artesyn Technologies Inc.
- ArthroCare Corporation
- Arthur Andersen & Company, Sociét
- Arthur D. Little, Inc.
- Arthur J. Gallagher & Co.