A Series B investment round was led by the same venture capitalists as well as Cendant and Allen & Company in early 2006. Later that year, three of the world's largest buyers and sellers of advertising, including CBS Corporation, Interpublic Group, and WPP as well as Allen & Company, Tudor Investment Corporation, Capital Research and Management, media executive Lachlan Murdoch and financier Vivi Nevo made equity investments in the company.
In 2006, a Series B funding round was launched by the same venture capitalists as well as Cendant and Allen & Company. Later that year, three of the world's largest intermediaries for advertising transactions, including CBS Corporation, Interpublic Group, and WPP made equity investments in the company, alongside Allen & Company, Tudor Investment Corporation, Capital Research and Management, media executive Lachlan Murdoch, and financier Vivi Nevo.