Was this a scenario where he lost them because some sort of “cause” event occurred, like leaving to work for a competitor? I can’t imagine that would even be valid under CA law?
I’m not even sure who was forcing him to forfeit his shares…
Vest has two meanings: If it's a stock option, then it means you have the ability to purchase a share at a pre-determined price, no matter the current public price of the stock (or even if there is no public price). If it's a Restricted Stock Unit, it means you own that share.