A new analysis by Bloomberg finds that the net worth of Apple CEO Tim Cook has passed the $1 billion mark, officially making him a billionaire. It’s certainly an impressive number, but assuming it’s just over $1 billion, he’s got a long way to go before he catches up to the other CEOs on the Bloomberg Billionaires list. Jeff Bezos, CEO of Amazon, tops the list at $187 billion, followed by former Microsoft CEO Bill Gates at $121 billion, and Mark Zuckerberg of Facebook at $102 billion. Tesla CEO Elon Musk is only No. 10 on the list, but even he is well ahead of Cook at $68.7 billion.