Utilize the input text as a context reference, choose the right relationship between Leon Black and Apollo Global Management 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.

When financier Leon Black said his Apollo Global Management LLC was exiting “ everything that’s not nailed down ” amid rising valuations, he made headlines.

Answer: employer