Paul Allen co-founded Microsoft with Bill Gates, later founded Vulcan Inc. and owned the Seattle Seahawks and Portland Trail Blazers.
William Boeing founded the Pacific Airplane Company in 1916, renamed Boeing in 1917, now among the world's largest aerospace manufacturers and the biggest US exporter by value.
Howard Schultz turned Starbucks into the world's largest coffee-house chain, twice leading it as CEO and returning during the 2008 financial crisis to restructure the business.
Bill Gates co-founded Microsoft in 1975, became a billionaire at 31 and, after leaving day-to-day management, turned to global health and climate work through the Gates Foundation and Breakthrough Energy.
Jeff Bezos turned a 1994 online bookstore into Amazon, the world's largest e-commerce and cloud company, and went on to found Blue Origin and buy The Washington Post.
