Utilize the input text as a context reference, choose the right relationship between Global 500 and Fortune 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.

Over half of the companies on the newly-released 2015 Fortune Global 500 Index use the international publishing, research and consultancy firm Oxford Business Group (OBG) as a source of reference for their operations.

Answer: creator