Insider Trading — QuoTrend

ZHANG KER – Insider Transactions

Ticker	Owner	Relationship	Date	Transaction	Cost	#Shares	Value ($)	#Shares Total	SEC Form 4
AMBQ	ZHANG KER	Director	Sep 11 '26	Sale	63.44	10,000	634,361	20,366	Sep 15
AMBQ	ZHANG KER	Director	Sep 04 '26	Option Exercise	5.88	1,785	10,496	30,551	Sep 09
AMBQ	ZHANG KER	Director	Sep 04 '26	Sale	56.92	185	10,530	30,366	Sep 09