X0306 4 2020-03-25 0 0001280263 AMBARELLA INC AMBA 0001602676 Chen Yun-Lung 3101 JAY STREET SANTA CLARA CA 95054 0 1 0 0 VP, Business Development Performance Stock Units 2020-03-25 4 A 0 8538 0.0 A Ordinary Shares 8538 8538 D Restricted Stock Units 2020-03-25 4 A 0 8538 0.0 A Ordinary Shares 8538 8538 D Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares. Reporting person was granted an award of performance-based RSUs covering a target of 8,538 ordinary shares (the "Target RSU Number"). Pursuant to time-based vesting requirements, 100% of this award is scheduled to vest on March 15, 2023, subject to continued service requirements through such date. In addition, the number of shares subject to the RSUs may be increased or decreased by up to 100% of the Target RSU Number or may remain the same, based on attainment of specified levels of the Company's total stockholder return over the period of February 1, 2020 through January 31, 2023. The restricted stock units vest at the rate of 1/12 per quarter commencing on March 15, 2020. By: /s/ Michael Morehead, Attorney-in-Fact For: Yun-Lung Chen 2020-03-27