Politics and Business magazines
- ARCO Chemical Company
- Arcor S.A.I.C.
- Arctco, Inc.
- Arctic Cat Inc.
- Arctic Slope Regional Corporation
- Arden Group, Inc.
- Areva NP
- Argon ST, Inc.
- Argosy Gaming Company
- Argyll Group PLC
- Aria Foods amba
- Arianespace S.A.
- Ariba, Inc.
- Ariens Company
- Aris Industries, Inc.
- Aristocrat Leisure Limited
- Arjo Wiggins Appleton p.l.c.
- Ark Restaurants Corp.
- Arkansas Best Corporation
- Arkla, Inc.