AGE: 58 OCCUPATION: President, Henry Crown and Company

Son of the influential billionaire Lester (see “Power Couples”), Jim runs the private investment firm his grandfather founded. He’s also the lead director of and a major shareholder in huge defense contractor General Dynamics— and a big mover in civic, philanthropic, and political circles.

RELATED: Most Powerful Ex-Chicagoans | Power Couples | Power Siblings | Up-and-Comers | Poll: Which Powerful Chicagoan Would You Call Back First? | Quiz: Do You Know Chicago’s Power Players? | Back to all 100

Photograph: Mary Hilliard