Whilst media outlets were clamouring for WPP's take on relinquishing the title of world's largest media agency, the next band of media groups were quietly going about their business, with executives rallying their agencies and shares prices on the up.

E-commerce giant Amazon have appointed IPG's Initiative to handle their global media duties, supplanting WPP's Mindshare to the business.

Zurich Insurance Group has awarded its global integrated advertising, media and digital account to Interpublic Group after a competitive pitch. The Zurich account represents a major coup for IPG, breaking a monopoly between incumbent media group Mindshare (WPP) and Publicis Worldwide.

Interpublic Group of Companies has announced the immediate departure and replacement of McCann Worldgroup's British CEO Nick Brien, with native New Yorker Harris Diamond, CEO of another Interpublic division, the Constituency Management Group, named as his successor.

Digital media giant Aegis, who recently acquired iSpy Marketing agency, has reported revenues of £596.8m in the first half of the year, up from £519m in 2011.