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 Ad Tech Companies Band Together to Form New Coalition MediaMath, Turn, DataXu, AdMeld, PubMatic, Rubicon Project create common online ad buying platform By Edmund Lee, Published on December 10, 2010 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. Register Now Already a member? Log in.