X0306 4 2020-03-17 0 0001280263 AMBARELLA INC AMBA 0001558685 Day Christopher 3101 JAY STREET SANTA CLARA CA 95054 0 1 0 0 VP, Marketing Ordinary Shares 2020-03-17 4 M 0 4698 A 9922 D Ordinary Shares 2020-03-17 4 S 0 2113 38.988 D 7809 D Restricted Stock Units 2020-03-17 4 M 0 3758 0.0 D 2020-03-15 Ordinary Shares 3758 0 D Restricted Stock Units 2020-03-17 4 M 0 1211 0.0 D 2021-06-15 Ordinary Shares 1211 6056 D Restricted Stock Units 2020-03-17 4 M 0 668 0.0 D 2022-03-15 Ordinary Shares 668 5341 D Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares. Includes 193 shares acquired under the Company's employee stock purchase plan on March 16, 2020. Shares sold to pay tax obligations resulting from the vesting of restricted stock units. On March 28, 2017, reporting person was granted an RSU award covering a target of 3,758 ordinary shares (the "Target RSU Number"), subject to satisfaction of predetermined, performance-based vesting criteria that could result in 0% - 150% of the Target RSU Number becoming eligible to vest, subject to certain adjustments. On February 26, 2018, the Company's Board of Directors determined the performance criteria for the RSUs had been satisfied at a level that resulted in 100% of the Target RSU Number becoming eligible for time-based vesting. Pursuant to time-based vesting requirements, 100% of the award would vest on March 15, 2020, subject to possible adjustment based on a total stockholder return ("TSR") performance metric covering the period of February 1, 2017 to January 31, 2020 (the "TSR Period"). As a result of the Company's TSR performance over the TSR Period, the RSUs eligible to vest were reduced by 25%. A total of 2,819 ordinary shares were delivered to reporting person. The restricted stock units vest at the rate of 1/12 per quarter commencing on June 15, 2018. The restricted stock units vest at the rate of 1/12 per quarter commencing on March 15, 2019. By: /s/ Michael Morehead, Attorney-in-Fact For: Christopher Day 2020-03-19