If it’s really an issue, you can get it both way. Fire them now and pay a prorata of what would have vested as severance but you are opening a can of worms rega

If it’s really an issue, you can get it both way. Fire them now and pay a prorata of what would have vested as severance but you are opening a can of worms regarding who get what when. You can also talk to them, tell them you have noticed they are disconnected and have the feeling that they are waiting for vesting to leave the company. Say you find their current performance unacceptable but don’t want to deprive them of their vesting and see if you can work something out like an unpaid leave until the due date.