S-I/A Table of Contrail third of each grant of stock options and restricted stock will be subject to performance-based vesting conditions. Subject to the recipient's continued service with the Company through each applicable vesting date, one fourth of the shares subject to time-vesting stock options and time- vesting restricted stock will vest on each of December 31. 2017, December 31, 2018, December 31, 2019 and December 31, 2020. Subject to the recipient's continued service with the Company through the applicable vesting event, shares subject to performance-based stock options and performance-based restricted stock will fully vest on the date immediately following the date on which the closing trading price of a share of Class A common stock on the NYSE or other such primary exchange on which shares of Class A common stock am listed and traded has equaled or exceeded two times the per share price to the public in this offering for ten consecutive trading days. If the recipient's employment is terminated by us without cause, by the recipient for good reason, or as a result of the recipient's death or disability, any outstanding and untested time-vesting stock options and time-vesting restricted stock that would have vested on the next vesting date will vest pro rata based on the recipient's completed number of months of employment with us since the vesting date immediately preceding the recipient's temtination. Upon any other termination of employment, all unvested time-vesting stock options and time-vesting restricted stock will be forfeited. If the recipient's employment is terminated prior to the date on which the performance-vesting stock options or performance- vesting restricted stock vests, any outstanding and untested performance-vesting stock options and performance-vesting restricted stock will be forfeited. On a "change in control.- any outstanding and unvested time-vesting stock options and time-vesting restricted stock will become fully