X0609 4 2026-03-17 0 0001280263 AMBARELLA INC AMBA 0001882831 Ju Chi-Hong 3001 TASMAN DRIVE SANTA CLARA CA 95054 0 1 0 0 Senior VP, Systems & GM, Asia 0 Ordinary Shares 2026-03-17 4 M 0 9553 A 168895 D Ordinary Shares 2026-03-17 4 S 0 4729 52.77 D 164166 D Ordinary Shares 2026-03-18 4 A 0 5930 0.0 A 170096 D Ordinary Shares 2026-03-19 4 S 0 2155 54.14 D 167941 D Ordinary Shares 8000 I by Foundation Performance Stock Units 2026-03-17 4 M 0 9553 0.0 D 2026-03-15 Ordinary Shares 9553 0 D Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares. Includes 154 shares acquired under the Company's employee stock purchase plan on March 16, 2026. Shares sold to pay tax obligations resulting from the vesting of restricted stock units. Represents an award of fully-vested restricted stock units (RSUs) issued to reporting person as payment of reporting person's annual bonus under the company's previously established Fiscal Year 2026 Annual Bonus Plan. Each restricted stock unit represents a contingent right to receive one Ordinary Share. On April 3, 2023, reporting person was granted a performance-based RSU award covering a target number of ordinary shares (the "Target RSU Number"). Pursuant to time-based vesting requirements, the award would vest in full on March 15, 2026. In addition, the number of shares subject to the award could be decreased by up to 100% or increased by up to 150% of the Target RSU Number, based on attainment of specified levels of the Company's total stockholder return and revenue growth over the period of February 1, 2023 through January 31, 2026 (the "TSR Period"). As a result of the Company's performance over the TSR Period, the number of shares that vested was 100% of the Target RSU Number. By: /s/ Michael Morehead, Attorney-in-Fact For: Chi-Hong Ju 2026-03-19