Charles P. Stevenson Jr. is the billionaire president of Navigator Group, a private hedge fund. In addition to being a member of a prominant New York City family, he holds the powerful position of president of the Co-op board of 740 Park Avenue, the illustrious building that was the childhood home of Jackie Kennedy. Arguably the most prestigious New York City Co-op, It is the subject of the book "740 Park Avenue: The Story of the World's Richest Apartment Buidling." Its 31 units are owned by the likes of David Koch (4th wealthiest American), Ronald Perelman (26th wealthiest American), Ronald Lauder (billionaire son of Estée Lauder), Howard Marks (investment billionaire), J. Ezra Merkin (billionaire financier Chairman of GMAC), Stephen Schwarzman (billionaire chairman of buyout giant Blackstone Group), John Thain (last chairman of Merrill Lynch), and Vera Wang. The board has rejected Barbara Streisand and Barbara Walters, among many more. the late heir John D. Rockefeller, Jr., Time Warner CEO Steve Ross, and financier Saul Steinberg lived in the building as well.