This list of Facebook insiders that sold stock already is kind of interesting. It looks like Zuckerberg even cashed out a few shares for a cool billion and change. 

- Mark Zuckerberg, Facebook's CEO, sold 30.2 million shares for $1.14 billion
- Accel Partners, an early Facebook investor, sold 57.7 million shares for $2.1 billion
- Peter Thiel, a very early Facebook investor, sold 16.8 million shares for $638 million
- DST Global, a Russian investment fund, sold 45.7 million shares for $1.7 billion
- Goldman Sachs, a Facebook investor, sold 24.3 million shares for $923 million
- Elevation Partners, a Facebook investor, sold 4.6 million shares for $175 million
- Greylock Partners, a Facebook investor, sold 7.6 million shares for $289 million
- Mail.ru Group, a Russian Internet company, sold 19.6 million shares for $745 million
- Mark Pincus, the CEO of Zynga, sold 1 million shares for $38 million.
- Meritech Capital sold 7 million shares for $266 million
- Microsoft, a Facebook partner and investor, sold 6.6 million shares for $250 million
- Tiger Global, a hedge fund, sold 19 million shares for $722 million
- Reid Hoffman, a Silicon Valley investor, sold 943,000 shares for $36 million