144 0002078559 XXXXXXXX LIVE 0001500412 AMBIQ MICRO, INC. 001-42766 6500 RIVER PLACE BLVD. BUILDING 7 SUITE 200 AUSTIN TX 78730 (512) 879-2850 Sean Chihhsiang Chen Officer Common Stock Morgan Stanley Smith Barney LLC

Executive Financial Services 1 New York Plaza, 8th Floor New York NY 10004

5802 401208.30 24516643 10/02/2026 NYSE Common Stock 10/02/2025 Restricted Stock Units Issuer N 5802 10/02/2025 Services Rendered N Sean Chihhsiang Chen

6500 River Place Blvd. Building 7 Austin TX 78730

Common Stock 09/14/2026 15000 902129.88 Sean Chihhsiang Chen

6500 River Place Blvd. Building 7 Austin TX 78730

Common Stock 09/04/2026 15000 857557.50 This is a sell-to-cover transaction for taxes owed related to recent vesting and settlement of restricted stock units granted by the Issuer. 10/02/2026 /s/ Sean Chihhsiang Chen