X0306 4 2020-12-08 0 0001280263 AMBARELLA INC AMBA 0001189229 PAISLEY CHRISTOPHER B 3101 JAY STREET SANTA CLARA CA 95054 1 0 0 0 Ordinary Shares 2020-12-08 4 M 0 2000 16.35 A 28676 D Ordinary Shares 2020-12-08 4 S 0 2000 90.034 D 26676 D Non-Qualified Stock Option (right to buy) 16.35 2020-12-08 4 M 0 2000 0.0 D 2023-06-05 Ordinary Shares 2000 2222 D The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan of the Paisley Living Trust adopted on June 22, 2020. The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $89.45 to $90.38 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares sold at each separate price within the ranges set forth in this Form 4. Shares subject to the option vest monthly over one year commencing on June 6, 2013. By: /s/ Michael Morehead, Attorney-in-Fact For: Christopher Paisley 2020-12-10