With his two siblings, John Mars owns Mars Inc., the world's second-largest confectionery. The company manufactures candy (M&M's, Milky Way, Snickers), chewing gum (Juicy Fruit, Orbit, Extra), pet chow (Pedigree, Royal Canin, Whiskas) and packaged foods (Uncle Ben's, Suzi Wan). The closely held company has annual revenue of more than $30 billion.
Bloomberg Markets’ inaugural list of the world’s richest people showcases the billionaires who pull the levers on the global economy. Their net worth totals $2.7 trillion, about the size of the gross domestic product of France, the fifth-biggest economy on the planet.