Stephen Bisciotti, $1.3 billion.
Cofounder at age 23 of the technology staffing firm Aerotek, which grew into the Allegis Group—the nation’s largest privately held staffing firm—Bisciotti is best known as a great fan of the University of Maryland and owner of the Baltimore Ravens.

B. Francis Saul II, $1.2 billion.
The son and grandson of mortgage lenders and the founder of Chevy Chase Bank, which he sold last year to Capital One for $520 million in cash and stock, Saul owns real-estate investment trusts that own and operate properties and hotels in the Mid-Atlantic region.

Dan Snyder, $1.1 billion.
The University of Maryland dropout, a marketing whiz said to have made his first million at age 20, bought the Washington Redskins in 1999 for $800 million. Despite a losing record, the team is worth more than $1.5 billion today.

Steve Case, $1.1 billion.
The AOL cofounder’s current investments range from luxury resorts to the car-sharing service Zipcar. He sold the financial-services firm Revolution Money to American Express for $300 million this year. He and his wife, Jean, operate the Case Foundation.

This article first appeared in the November 2010 issue of The Washingtonian.

Contributing to this article were Marisa M. Kashino, Mary Clare Glover, Zac Farber, Anna Spiegel, Luke Mullins, Mollie Reilly, Elliot Kort, Caitlin Fairchild, Sherri Dalphonse, Emily Leaman, Katie Glueck, Jason Koebler, Cindy Rich, Kate Nerenberg, Denise Kersten Wills, Jack Limpert, Garrett M. Graff, and Ken DeCell.