DETROIT (AP) — The meteoric rise of Tesla shares that pushed the company's value over $100 billion could turn into a supercharged payday for CEO Elon Musk.

Stock in Tesla Inc. rose another 6.3% Wednesday, pushing the market value of the electric vehicle and solar panel maker past a critical milestone in Musk's pay package. He could get stock options that are worth stock option package that's worth close to $400 million.

Tesla shares were trading at $581.40 during the afternoon, giving it a market capitalization of close to $105 billion.

Shares have tripled in value since May, meaning Tesla's market capitalization now exceeds the value of Ford and General Motors, combined.

For Musk, hitting $100 billion in market value triggers an option to buy 1.69 million shares of Tesla stock for $350.02 per share. If he sells the shares, he would make more than $391 million.

But for the options to vest, the market capitalization has to average above $100 billion for the next six months, and it has to be above $100 billion for the next 30 business days, according to the compensation packages contained in company filings with the U.S. Securities and Exchange Commission.

Musk could get more stock payouts for every additional $50 billion increase in market capitalization. By meeting ambitious market capitalization and operational milestones, he could earn more than $50 billion over the next decade if that value hits $650 billion.

In the third quarter, Tesla posted a surprising $143 million profit, raising hopes that the company, which also makes battery storage units, could finally be turning the corner to profitability.

But Tesla has posted mostly losses during its first decade as a publicly held company, and it lost $1.1 billion during the first half of last year. The company reports fourth-quarter results on Jan. 29.

Earlier this year the company said it delivered a record of about 112,000 vehicles in the fourth quarter and about 367,500 for the full year in 2019.

Tesla, based in Palo Alto, California, had earlier projected deliveries of between 360,000 and 400,000 units worldwide.

Also, on Wednesday, the state of Michigan confirmed that Tesla had reached a lawsuit settlement allowing it to sell and service vehicles in the state.