Read this article on geekwire on increase in wealth of Bill due to growth in MS stock.
The Microsoft co-founder saw his fortune grow by $15.8 billion last year to $78.5 billion, according to Bloomberg’s Billionaire Index. Gates finished 2013 as the world’s richest person, a title he reclaimed back in May for the first time since 2007. His fortune increased by $7 billion in 2012.
Microsoft’s stock grew by 35 percent in 2013.
Part of that growth is due to Microsoft’s stock, which increased by more than 35 percent in 2013 alone. Gates is still Microsoft’s largest individual shareholder, with more than 4.5 percent of the company, according to Microsoft’s latest proxy statement.