Organisationen
- AOK Rheinland/Hamburg
- AOK-Bundesverband
- AOL
- APA
- APOEL Nikosia
- AQIM
- ARC
- ARD
- ART Düsseldorf
- ARTE
- AS Monaco
- ASC Göttingen
- ASC Schöppingen
- ASF
- ASTA
- ASV Dinkel
- ASV Ellewick
- ASV Senden
- ASX
- AT&T
- ATR
- ATSV Bremen 1860
- ATU
- ATV
- ATV Haltern
- AUA
- AVG
- AVM
- AWD
- AWO
- AXA S.A.
- AZ Alkmaar
- AZ-Online
- Aachener Karnevalsverein
- Aachener Nachrichten
- Aachener Zeitung
- Aalborg BK
- Aareal Bank
- Ab-in-den-urlaub.de
- Abba
- Abbott Laboratories
- Abellio Rail NRW
- Abertis Infraestructuras SA
- Abu Sayyaf
- Academy of Motion Picture Arts and Sciences
- Accenture
- Accor S.A.
- Acea
- Acer
- Acmee
- Activision
- Activision Blizzard Entertainment
- Adecco
- Adidas
- Adidas Ag
- Adler Mannheim
- Adler Modemärkte
- Adlerwarte Berlebeck
- Adobe Systems
- Adolf Ahlers
- Adolf Würth GmbH
- Adveniat
- Aer Lingus Group
- Aeroflot Russian International Airlines
- Aerosmith
- AfD
- Afrikanische Union
- Aftenposten
- Aftonbladet
- Ages Maut System
- Agora Energiewende
- Ahlener SG
- Ahmadiyya
- Ahmadiyya Muslim Jamaat
- Ahorn-Panther Paderborn/Bielefeld
- Air Asia
- Air Baltic
- Air Berlin
- Air Canada
- Air Europa
- Air France
- Air India
- Air Liquide S.A.
- Air Marin
- Air New Zealand
- Airbnb
- Airbus Group
- Airbus S. A. S.
- Airbus-Werk
- Airport Weeze