What is the relationship between Leon Black and Apollo Global Management in the context of the input sentence. Choose an answer from: 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.

Apollo Global Management LLC, the private equity firm whose co-founder Leon Black is pushing to attract more capital from small investors, is teaming up with Ivy Investment Management to offer two new mutual funds.

Answer: employer