The third-richest person in the US is also the fifth-richest in the world. Larry Ellison, the co-founder and CEO of the software company Oracle, has a net worth of $39.5 billion. His fortune grew $11.5 billion in the last year to push him up one spot on the list of the richest people. Mr. Ellison lives in Woodside, Calif.

REUTERS/Dani Cardona/Files
Software mogul Larry Ellison smiles during a news conference after Race 1 of the 33rd America's Cup in Valencia, in this file photo taken February 12, 2010. Ellison is valued at $39.5 billion on the Forbes list of the richest people in the world.