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EdgarHawk

Chen Sean Chihhsiang

President and COO

Officer

Latest: President and COO selling · May 2026

1 filing analyzed · 1 company · Latest 2026-05-18

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Companies

Company Buys Sells Direction
Ambiq Micro, Inc. AMBQ 0 1 Net selling

Activity

May 2026
2026-05-18 Ambiq Micro, Inc. AMBQ
high
Sell
55,685 shares
$3,947,281
Significance 7/10

AMBQ President & COO Chen Sean Chihhsiang sells 55,685 shares in 2 transactions for $3.9M, reducing holdings by -31.6% near 52-week high

Chen Sean Chihhsiang, President and COO of Ambiq Micro, Inc. (AMBQ), executed 2 separate sales totaling 55,685 shares for $3,947,280.94, at prices of $70.53 and $71.37, reducing his holdings from 175,960 shares to 120,275 shares — a -31.6% reduction vs pre-transaction holdings. The sales occurred with the stock at $71.34 (current price), just -3.2% from its 52-week high of $73.72, following extraordinary momentum: a 30-day change of +105.2% and a 90-day change of +140.8%. The scale of the disposition is notable in the context of a company posting a quarterly net income of $-10,171,000 on revenue of $25,060,000, with annual revenue growth of -4.7%, while carrying a market cap of $1,524,946,290.36. The combination of a large reduction in a key executive's position against a backdrop of negative profitability and declining revenue, at prices near the 52-week high, is a signal investors may wish to monitor closely.

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