Please keep in mind, the compensation numbers are from employees that have typically worked for a couple years, have stock grants that have appreciated signific

Please keep in mind, the compensation numbers are from employees that have typically worked for a couple years, have stock grants that have appreciated significantly, and that is a significant portion of their total compensation. If you want to compare your offer, look at GOOG, AAPL, FB and what their stock value was in 2016. Use that share price to figure out what the employees that were hired in 2016 were offered in terms of stock, and compare your offer. There is no magic to it. HR is just taking what they think they need to offer to be competitive, assuming a 10-20% annual increase in stock value, and making the offer. The primary reason why you see such high total compensation numbers is that tech stocks have done extremely well recently, which has put employees above their target compensation.