On March 1, 2021, the stock price for MRO open at $11.51 and closed at $11.20 per share. The current price is roughly double the price from that day.
To calculate exactly how much you are missing out on this year, multiply your salary times your target, then divide by $11.51 to get the number of shares you should have been awarded.
Then multiply that by the current price and divide by 3. That is how much those below grade 14 are missing, and it only gets worse in the years to come.