Utilize the input text as a context reference, choose the right relationship between Sergio Marchionne and Fiat from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

In particular, they have leapt more than 80 percent since October, when CEO Sergio Marchionne announced plans to spin off Ferrari and give a big chunk of the highly-prized sports car maker's shares to Fiat Chrysler Automobiles (FCA) investors.

Answer: employer