As distasteful as this sounds, it's technically his property (the 91.6 million shares of stock ~3.1bn) as this was his ownership stake during the SPAC reverse merger process.
Imagine if as a condition of leaving your FAANG you had to forfeit all of your already vested stock or if you cofounded a company a condition of you leaving was giving up your pre-existing equity.
Imagine if as a condition of leaving your FAANG you had to forfeit all of your already vested stock or if you cofounded a company a condition of you leaving was giving up your pre-existing equity.