Fiat SpA CEO Sergio Marchionne

Fiat SpA CEO Sergio Marchionne

Alessandra Benedetti/Bloomberg

Fiat Chief Executive Officer Sergio Marchionne, who oversaw the acquisition of a 20 percent stake in Chrysler in June last year, pushed through the separation so he can focus on carmaking and foster more auto alliances. Fiat’s remaining assets after the spinoff include the Maserati and Ferrari luxury brands.