You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Amazon Tops Walmart in Ranking of Most Valuable Brands Strong Omnichannel Play Sets Retail Brands Apart From Peers By Kimberly August and Pierre Dupreelle, Published on May 22, 2013 0 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.