Utilize the input text as a context reference, choose the right relationship between Infosys and Vishal Sikka 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.

Infosys chief executive Vishal Sikka bought 10 per cent of the blue chip shares granted to him as restricted stock option units, the global software major said on Wednesday.

Answer: chief_executive_officer