2017 10k - "...Beneficial ownership data in the table has been calculated based on Commission rules that require us to identify all securities that are exercisable or convertible into shares of our common stock within 60 days of July 19, 2017 and treat the underlying stock as outstanding for the purpose of computing the percentage of ownership of the holder...." https://www.sec.gov/Archives/edgar/data/1397016/000161577417007478/s108458_10k.htm
2016 10K - "...Beneficial ownership data in the table has been calculated based on Commission rules that require us to identify all securities that are exercisable or convertible into shares of our common stock within 60 days of December 22, 2016 and treat the underlying stock as outstanding for the purpose of computing the percentage of ownership of the holder...." https://www.sec.gov/Archives/edgar/data/1397016/000161577417007478/s108458_10k.htm