With an offer worth $2 billion USD, Ballmer outbid investors Tony Ressler and Bruce Karsh, who submitted a $1.2 billion offer, and media mogul David Geffen, who with his partners at the Guggenheim Group, put up an offer of $1.6 billion. Retired as the CEO of Microsoft this past February, Ballmer has a personal wealth of $20.7 billion and ranks #32 on Forbes 400 Richest Americans list. As reported by the Los Angeles Times, Ballmer’s deal sets the record as the most expensive purchase for a NBA franchise in the league’s history.