Tesla founder Elon Musk has been set what has to be one of the toughest bonus plans ever - increasing the US$59 billion ($80.1 billion) electric car maker's market value to US$650b in a decade.
However, if he succeeds he could get one of the biggest windfalls ever received by a chief executive - almost US$70b, though this assumes the company does not issue more shares or raise equity.
At today's prices, the award is worth about US$7.2b, on top of the almost 20 per cent stake in the business Musk already holds, according to the Daily Telegraph.
California-based Tesla revealed the scheme in a regulatory filing that also notes that the billionaire will not receive any guaranteed pay of any kind: no salary, no cash payouts or shares that vest as time rolls on.
Tesla said: "Elon's only compensation will be a 100 per cent at-risk performance award, which ensures that he will be compensated only if Tesla and all of its shareholders do extraordinarily well. Because all Tesla employees are provided equity, this also means that Elon's compensation is tied to the success of everyone at Tesla."