I have seen people follow this strategy and then the stock goes through the roof. Yes, diversification is generally smart, but seeing all of your colleagues get

I have seen people follow this strategy and then the stock goes through the roof. Yes, diversification is generally smart, but seeing all of your colleagues get rich while you make 8% returns can be very difficult emotionally. Therefore, I'd sell most of the grant but keep a significant fraction (maybe 25%) as a hedge.