9/ 1 month before $FB IPO, Zuck bought IG.  Sequoia injected $50 mn at $500 mn valuation on April 04, 2012.  Zuck invited IG guys, negotiated the deal in 48 hours, and acquired IG for $1B on April 09, 2012.  Sequoia doubled the money in 5 days.  FB 100x the money in 6 years.