Mark Zuckerberg made $3.5 billion last month (November)

Mark Zuckerberg made $3.5 billion last month (November).
Facebook's stock shot up from $21.08 a share on the first day of
trading in November to $28 a share at the end of the day Friday, its
highest price since July. Zuckerberg, who owns about 504 million
shares of Facebook stock, gained about $3.48 billion as a result...
When Facebook first went public at $38 a share in May, Zuckerberg's
shares were worth$19.1 billion. In the following months, the stock
dropped to less than half that IPO price to$17.55 in late August,
pushing Zuckerberg's net worth down to$8.84 billion.
Since then, Facebook's stock has recovered in fits and starts and so
has Zuckerberg's wealth. November proved to be by far the most robust
growth month for the stock to date, thanks to two big factors. First,
the company had a strong earnings report in late October, which showed
that Facebook was making progress in monetizing mobile. Secondly, the
second and largest lockup period for stocks held by employees finally
expired in the middle of November, which was something investors had
been dreading for months and arguably held down the stock price.
As of last Friday, Zuckerberg's networth was $14.1 billion.