Mizuho, a banking holding company, completed the acquisition of Greenhill & Co, an independent investment bank entirely focused on providing financial advice, for $550m. "Greenhill is a proven industry leader, and its team has led many of the largest and most complex transactions for clients globally, across a wide range of sectors. Mizuho is committed to the expansion of its investment banking platform, and we are excited for the Greenhill team and brand to become a core pillar of this strategy," Jerry Rizzieri, Mizuho Securities USA President and CEO.