Facebook has become one of the highest-valued companies in the world after a stock surge saw it leapfrog General Electric to join the ranks of the top ten companies on the S&P stock market index.

And quietly, in the process, its founder Mark Zuckerberg has become the ninth richest person in the world.

Zuckerberg leap-frogged Ingvar Kamprad, the founder of Ikea and Sweden’s richest man and his steady ascent of Bloomberg’s list of the world’s richest continues apace. Just a few weeks ago, he slipped past four members of the Walton family to become the world’s 11th richest man.

Zuckerberg is now worth an estimated $42.9 billion, shy of the fortune owned by Amazon founder Larry Bezos, who is worth $43.5 billion, and that of Oracle database founder Larry Ellison, who is worth $43.7 billion.