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 Once No. 1, Interpublic Slips to Fourth Among Holding Cos. Full-Year 2009 Earnings Down Almost 60%, but CEO Roth Strikes Optimistic Tone for 2010 By Kunur Patel, Published on February 26, 2010 2 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.