Due to various agreements, Fiat must achieve certain milestones before expanding its ownership in the company, such as producing a 40-mile-per-gallon vehicle off a Fiat platform in the U.S. This would grant the Italian automaker an option to acquire an additional 5%, taking its total equity stake to 57% later this year.
FORBES: Fiat To Take Chrysler Stake To 57%, Plans To Buy 6% From Treasury