Other notable women with 10-figure fortunes include Oprah Winfrey, who moves up three spots to number two, thanks in part to her new ties to Weight Watchers. Since picking up a 10% stake in the diet empire and becoming its spokesperson last October, its stock has gained some 90%. Facebook’s Chief Operating Officer Sheryl Sandberg also got a big boost. Her fortune is now $1.4 billion, up a third from a year ago thanks to the social network’s strong results, making her one of the year’s biggest gainers. Sandberg, who got that job eight years ago, has helped oversee the company’s market capitalization grow by a staggering $328 billion.