This king rules one whopper of a fast-food empire. Burger King Holdings operates the world's #3 hamburger chain by sales (behind McDonald's and Wendy's) with more than 12,500 restaurants in the US and more than 80 other countries. In addition to its popular Whopper sandwich, the chain offers a selection of burgers, chicken sandwiches, salads, and breakfast items, along with beverages, desserts, and sides. Many of the eateries are stand-alone locations offering dine-in seating and drive-through services; the chain also includes units in high-traffic locations such as airports and shopping malls. Investment firm 3G Capital acquired more than 90% of the company in 2010.