||each restricted stock unit represents a contingent right to receive one share of the underlying common stock.
||represents shares of common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units and the corresponding acquisition of shares of common stock by the reporting person pursuant to the issuer's 2001 omnibus incentive compensation plan (amended and restated as of may 4, 2010), as amended.
||the grant of restricted stock units was previously reported as 20,619 restricted stock units representing a contingent right to receive 20,619 shares of common stock of the issuer, but was adjusted to reflect a grant of 32,687 restricted stock units representing a contingent right to receive 32,687 shares of common stock of the issuer following the completion of the previously-announced spin-off of the issuer's automotive marketplace business on may 31, 2017.
||the restricted stock units vested in four equal annual installments beginning on december 31, 2016. the vested shares were delivered to the reporting person on december 31, 2019.
||the restricted stock units underlying the grant (i) vested as to 25% of the grant on each of december 31, 2017, december 31, 2018 and december 31, 2019, and (ii) will vest as to the remaining restricted stock units on december 31, 2020. the corresponding shares of the issuer's common stock (a) were delivered to the reporting person as to the applicable vested shares on each of january 2, 2018, january 2, 2019 and january 2, 2020, and (b) following vesting and unless delivered earlier following a change in control of the issuer, will be delivered to the reporting person on january 2, 2021.