- AmbiPur Air Freshener
- AMC / Story Matters Here
- AMD Game
- Amer Restaurants
- American Airlines
- American Apparel
- American Express
- American Institute of Graphic Artists/Colle + McVoy
- American Legacy Foundation
- American Red Cross
- American Red Cross of Massachusetts Bay
- Ameriquest
- AMF
- AMF Pension
- AMI Insurance
- Amici dei Bambini
- Amnesty International
- Amnesty International Hungary
- AMNEWTON21
- Amoeba Digital Imaging
- AMP Energy Drink
- Amstel Beer
- Amstel Light
- Amstel Pulse
- Amtrak Northeast Regional
- Amway car wash
- ANA Airports
- Anabell Foundation
- Anabuki Construction
- ANAD
- Analisis & Strategia
- Anando Milk
- ANCAP
- Anchor Super Blue
- Andrea Romani
- Andrew Gaynord
- Andy Warhol
- Andy Warhol Exhibition
- Angry Video Game Nerd
- Animal Planet
- Animal Public
- Animal-Ambulance Breda
- Animaster Animation School
- Animax
- Animax Channel
- Ann Summers
- ANPE (National Agency for Employment)
- Answer, online insurance services
- ANTA
- Ante Kettle
- Anti Binge Drinking
- Anti Drinking and Driving
- Anti Speeding
- Anti-Drug National Agency
- Anti-Focus Group Film
- Anti-smoking
- Anti-Smoking Cmpaign
- Anti-smoking Message
- Antifom
- Antishop
- Antismoke Institute
- Antwerp Zoo
- Anurak Janmas
- Anything and Whatever soft drinks
- ANZ
- ANZ Small Business
- AOK
- Apartheid Museum
- Aparthied Museum
- Apline Plastic Surgery
- AppealNow.com
- Apple
- Apple Beer
- Apple iPhone
- Apple iPod
- Apple Mac
- Apple MacBook
- Apple MacBook Air
- Apple Mighty Mouse
- Apple Think Different
- Apple video iPod
- Appy Fizz
- Aptivus
- Apumanque Bikes
- Aqua Glide
- Aquafresh
- Aquafresh Flexigel
- AquaMagazine
- Aquaphor Healing Ointment
- Aquarius
- Aquatech
- Aquatech International Corporation
- ArabAd Peace Poster Design Contest
- Arag
- Arano
- Ararat Photo Contest
- Arby's
- Arcor
- ARD and ZDF
- Arena
- Arena swimwear
- Argos
- Ariel
- Arkaden
- Arlistan Coffee
