Since Tim Cook became CEO of Apple, the company's market cap has increased by over $300 billion, reaching a record $698 billion last week. That's just one of the success at Apple under Cook, who took over as CEO in 2011. There's also the iPhone 6 launch this year, with over 10 million iPhone 6 and iPhone 6 Plus phones sold in their first three days on the market. The company has also made inroads into China, and successfully launched Apple Pay, and iOS 8.