WhatsApp co-founder of Jan Koum is sitting on what is estimated to be a $9.1 billion fortune, and he will have plenty of time to enjoy that cash now that he has departed the company. That massive fortune came to Koum and WhatsApp co-founder Brian Acton when Facebook purchased their company back in 2009 for $22 billion in cash and stock. Acton

Source: Hot Hardware – WhatsApp Billionaire Co-Founder Departs To Play Ultimate Frisbee And Collect Porsches