A
- Arts in the City
- ArtTour International Publications Inc
- Ary Digital
- As-Safir
- Asahi Shimbun
- ASELSAN
- ASF Editora
- Asia City Singapore
- Asia City Thailand
- Asia Weekly
- ASIA-Plus Media Group
- Asian Art Newspaper
- Asian Geographic Magazines Pte Ltd
- Asian Media Group USA Inc.
- AsiaNet Pakistan
- Aspen and Vail en Espanol Magazines
- Assindustria Salerno Service srl
- Associated Media Group Pty Ltd
- Associated Media Publishing
- Association of Manufacturers and Exporters Canada
- Association of Waldorf Schools
- Association Revue Argument
- ATA Travel Business Media
- Atash Media & Marketing Inc
- Atelier Aymara
- Athleisure Magazine
- Athletisme Magazine
- Atlanta Journal-Constitution
- Atlanta Voice / Dallas Weekly
- Atlantis the Palm
- Atlas Group
- ATOM (Australian Teachers of Media)
- Attitude Media
- Auerbach Verlag und Infodienste GmbH
- Aujour'hui en France
- Aurora Production AG
- Austin American-Statesman
- Australian Geographic Holdings Pty LTD
- Australian Institute of Policy and Science
- Australian Library and Information Association
- Australian Motorcyclist Magazine Pty Ltd.
- Australian Natural Bodz
- Australian Property Journal
- Australian Traveller
- Austrian Development Agency
- AUTFLO SA DE SV
- Autobusiness-Weekly
- Autosport Media UK Ltd.
- Autovia
- Avantoure