39. Jed York
40u40 main jed york
Age: 31

CEO, San Francisco 49ers

Before you knock York for being the son of the team's owners, consider this: Last season, the 49ers' head coach, Jim Harbaugh, and GM Trent Baalke were both in their first year, both put in place by the young former Guggenheim Partners analyst, and the team made the playoffs for the first time since 2002. Harbaugh, whom York had to woo in a scrutinized public process, gelled with QB Alex Smith and got Coach of the Year. Off the field, York hired Gideon Yu, former CFO of Facebook, to be the team's president, and secured fat financing for the construction of a new $850 million stadium, set to finish in 2014.

Personal hero: His maternal grandpa, whose personal credo was "guts and drive."

--D.R.


  @FortuneMagazine - Last updated October 17 2012 05:11 PM ET
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