Most notable among Columbia's billionaire alumni are some of the most successful investment managers in the United States. : Columbia University is perennially ranked among the top 10 universities in the world. The Ivy league school boasts a long list of famous alumni including four U.S. presidents: Theodore Roosevelt, Franklin D. Roosevelt, Dwight D. Eisenhower and Barack Obama. However, the wealthiest alumni are graduates of the Columbia Business School, one of the most selective of the world’s top business schools.