The stock value is at the time of vesting. So if I am awarded 40 stocks in 2014 with a grant price of 100$ and vesting over 4 years, 10 of them will vest in 201

The stock value is at the time of vesting. So if I am awarded 40 stocks in 2014 with a grant price of 100$ and vesting over 4 years, 10 of them will vest in 2016. If 2016 (average) vesting price is 200, I am quoting 2000$ as my stock compensation. Basically, whatever will be reflected on my W2 under Adjusted Gross Income. But I agree, someone's stock compensation is tricky to evaluate - some quote it at the grant time, some quote at vesting time but at grant value, some quote otherwise.