There's no reason to. First, you're incentivizing people to leave if you offer to buy their stock - its one form of golden handcuffs. Second, its generally su

There's no reason to. First, you're incentivizing people to leave if you offer to buy their stock - its one form of golden handcuffs. Second, its generally such small percentages that it's not worth the time. Talking with a cfo, the only time you'll likely see this is if the company raises a new round and asks the new investors to earmark some of the money for existing employees. But the percentage will be limited, and won't be given to people who already left.