$117.5 Million, Mountain Home Road, Woodside, Calif.
$117.5 Million. The
neoclassical 9,000-square-footer was never
officially listed for sale, but it held the title of "most expensive" sale in the U.S. Back in 2013 when private equity top dog Tully Friedman handed the keys to Japan's no.2 richest man Masayoshi Son, CEO of Softbank. Built by architect Allan Greenberg in 2005, the hilltop Silicone Valley property with 360
views features tennis courts, formal gardens, pool house and a detached library is
neighbors to a mess of billionaire tech giants. (Think: Oracle's