The son of billionaire Lester Crown (No. 12) is a serious guy who knows how to handle serious money. He doesn’t just run his family’s private investment firm; he’s the lead director of defense industry behemoth General Dynamics, owns a ski resort in Aspen where the local elite flock during winter, and helps marshal the Crowns’ philanthropic efforts, which touch nearly every corner of the city.

Photograph: MARY HILLIARD