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 Former Yahoo Exec Ross Levinsohn Named CEO of Billboard, Adweek and THR Investment Firm Guggenheim Partners Announces Influx of Cash to Expand By Michael Learmonth, Published on January 15, 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.