144 0001882831 XXXXXXXX LIVE 0001280263 AMBARELLA, INC. 001-35667 3001 Tasman Drive Santa Clara CA 95054 408-734-8888 CHIHONG JOHN JU Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

5057 411093.14 42689006 10/13/2025 NASDAQ Common 12/15/2022 Restricted Stock Issuer N 1223 12/15/2022 Not Applicable Common 09/15/2025 Restricted Stock Issuer N 1985 09/15/2025 Not Applicable Common 12/15/2024 Restricted Stock Issuer N 1849 12/15/2024 Not Applicable N CHIHONG JOHN JU

3001 Tasman Drive Santa Clara CA 95054

Common 09/17/2025 1168 92770.04 Sales that were executed on October 13, 2025 are being reported on this Form 144 filed on October 14, 2025 given the EDGAR system was not accepting filings on October 13, 2025 in observance of the federal holiday. 10/13/2025 /s/ Chi Hong John Ju