Kabam poached one of the CEOs from EA Mobile
Aaron Loeb, who more recently headed EA Generation Studio (The Simpsons: Tapped Out and Monopoly Slots), became vice president of the American division of Kabam.
Aaron Loeb
This implies that he is responsible for the studio in San Francisco (Dark District) and Vancouver (Fast & Furious 6), with a total of 400 people.
A source: http://www.pocketgamer.biz