Elon Musk's SpaceX pay package sets goals tied to interplanetary colonization, requiring him to build a city on Mars to unlock its full value.

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Elon Musk's SpaceX pay hinges on interplanetary colonization, requiring him to build a city on Mars.

SpaceX's S-1 filing details a 1 billion-share grant tied to a Mars city with a million inhabitants.

The compensation would dwarf Musk's Tesla pay, which became the subject of a yearslong court battle.