Facebook CEO and co-owner Mark Zuckerberg is now worth an estimated $6.9 billion, according to the Forbes 400 table of the wealthiest Americans.
This puts him at number 35 in Forbes' chart - seven places above mercurial Apple boss Steve Jobs, who takes the number 42 spot with an estimated pot of $6.1 billion.
Zuckerberg's ballpark wealth is $2 billion up on last year, if Forbes' figures are correct, and comes almost solely from his 25 per cent stake in Facebook.
By contrast, $4.4 billion of Jobs' lot is calculated to come from his majority share in Disney.
26-year-old Zuckerberg is also the subject of a forthcoming Hollywood movie, The Social Network.
Microsoft's Bill Gates tops Forbes' list, with an estimated $54 billion. Google owners Larry Page and Sergey Brin share eleventh place, at $15 billion each.