Elon Musk could become the world's first trillionaire under terms of the pay package that Tesla shareholders are now voting on. Chip Somodevilla/Getty Images

Tesla shareholders could soon give CEO Elon Musk, already the wealthiest person on the planet, the chance to become the world’s first trillionaire – or risk him walking away entirely.

Musk’s new pay package is the key measure that will be up for a vote at Tesla’s annual meeting Thursday afternoon. Shareholders have widely approved Musk’s pay packages in the past, but this year holds an added risk – the company warned in September that Musk “raised the possibility that he may pursue other interests” should it be denied.

The compensation would come in the form of a stock grant that would give Musk as much as 423.7 million additiona

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