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 Not the 'Big Four' Holding Firms in Adland Anymore -- Now It's the Big Five Dentsu-Aegis Deal Expected to Close in Fourth Quarter of 2012 By Rupal Parekh and Kunur Patel, Published on July 12, 2012 1 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.