||represents shares of natr common stock withheld to pay taxes upon vesting of restricted stock units originally granted to the reporting person on february 12, 2018. the number of shares withheld was determined on february 12, 2020, based on the closing price of natr common stock on that date.
||these shares are in the form of restricted stock units (rsus). each rsu represents the right to receive one share of natr common stock. these rsus vest in three equal annual installments beginning on march 30, 2021.
||these shares are in the form of performance-based restricted stock units (prsus). each prsu represents the right to receive one share of natr common stock. the vesting of the prsus is contingent upon the achievement of the following share price milestones, which must be achieved within three years: $9.92; $12.20; $14.50; $16.78; $19.07; and $21.36. such milestones must be achieved as evidenced by the volume-weighted average price (vwap) over a period of 30-trading days. one-twelfth of the prsus vest upon the achievement of each milestone and an additional one-twelfth vests on the date that is one-year following the achievement of such milestone subject to the recipient's continued employment.