Ezekiel becomes holding group's first chief marketing and growth officer.
Castree is tasked with boosting WPP's biggest market.
Campaign reports from WPP's investor day.
WPP chief executive outlines plan to be 'creative transformation company'.
Mark Read will focus on communications, experience, commerce and technology.
Marketers laid bare the highs and lows of taking work in-house at Campaign US' first Breakfast Briefing in Manhattan.
Mother co-founder has a mandate for change.
Former WPP supremo wasted no time
It has been a year of extraordinary consolidation and welcome collaboration.
Growth is coming from performance marketing and digital design and build.
Total ad revenues and profit margin have declined.
Media buyer warns of 'gloomy narrative' because of Brexit.
Beauty brand has consolidated £90m business into Publicis agency.
Media buying, particularly performance marketing, is high on the agenda.
"We didn't want to call it Wunderman J Walter Thompson. Wunderman Thompson felt more personal and more human."
Advertising network and customer engagement specialist to join forces
Mark Howley takes charge temporarily.
Money raised goes to Head & Neck Cancer Foundation.
Price-comparison website is investing in 'smarter' marketing.
Posterscope held business for more than 20 years.