Insider Trading — QuoTrend

Chen Sean Chihhsiang – Insider Transactions

Ticker	Owner	Relationship	Date	Transaction	Cost	#Shares	Value ($)	#Shares Total	SEC Form 4
AMBQ	Chen Sean Chihhsiang	President and COO	May 15 '26	Option Exercise	5.88	55,685	327,428	175,960	May 18
AMBQ	Chen Sean Chihhsiang	President and COO	May 15 '26	Sale	70.89	55,685	3,947,281	120,275	May 18