Utilize the input text as a context reference, choose the right relationship between Bruce Flatt and Brookfield Asset 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.

In May, Brookfield Asset Management chief Bruce Flatt told shareholders in a letter that the company was looking to raise about $US21 billion across 2015 and early 2016 to fund a massive buying spree.

Answer: employer