Tesla's stock surge adds $13.5 billion to Elon Musk's fortune, the biggest increase for anyone this year

• Tesla's surging stock means Elon Musk has grown his net worth the most of anyone this year.
• The electric carmaker's boss has jumped from 35th to 22nd in the Bloomberg Billionaires Index.
• Tesla's market capitalization is also approaching $150 billion, the second of 12 valuation milestones Musk needs to hit to unlock his $50 billion compensation package.
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Thanks to Tesla's surging stock, Elon Musk has grown his fortune by more than anyone else this year.

Shares in the electric carmaker have soared more than 80% since the start of January, boosting its cofounder and CEO's net worth by $13.5 billion, according to Bloomberg - a bigger gain than anyone else on the Bloomberg Billionaires Index.

Musk, who owns about 20% of Tesla and the majority of SpaceX, has already jumped from the world's 35th richest person to its 22nd wealthiest this year, Bloomberg said. He passed Amazon boss Jeff Bezos' ex-wife, MacKenzie, as well as Nike cofounder Phil Knight and casino tycoon Sheldon Adelson on the way.

The polarizing executive, who has been sued for name-calling on Twitter and fined by regulators for misleading investors, stands to make a lot more money.

Tesla's market capitalization recently passed $100 billion, the first of 12 valuation milestones Musk needs to hit and sustain as part of his $50 billion compensation package. The startup's stock jumped another 20% on Tuesday, boosting its market cap to over $140 billion - not far off the second milestone of $150 billion.

If Tesla's market cap rises to at least $650 billion and stays there, and Tesla grows its 12-month revenues to $175 billion and its adjusted profits to $14 billion, Musk would unlock the full windfall.