Mr. Steinberg, 34, is the founder and chief executive of Individual Investor Group, a financial media company in Manhattan. His father is the chief executive of Reliance Group Holdings, the property and casualty insurance company in Manhattan. The bridegroom`s father is also an overseer of the Weill Medical College of Cornell University and a trustee of the University of Pennsylvania, where he is also chairman of the board of the Wharton School.