The combined wealth of twelve top 2009 Davos World Economic Forum attendees, including Mukesh Ambani, has increased by $175 billion, according to Bloomberg. Ambani added $27.8 billion, while Mark Zuckerberg and Bill Gates added $55.6 billion and $43.7 billion respectively. Media mogul Rupert Murdoch saw his wealth rise $15.1 billion and Dell Technologies founder Michael Dell added $17.2 billion.