AMBQ Ambiq Micro, Inc. Insider Trading

Director Timothy Chen sells entire 70,592-share stake at $78.85–$81.57 for $5,632,525.20; holdings drop to zero.

Timothy Chen, a Director at Ambiq Micro, Inc., executed 4 separate sales totaling 70,592 shares for $5,632,525.20 on 2026-05-27, eliminating his entire shareholding. The blended average price of $79.79 sits within the 52-week range of $22.12–$85.72 and only 7.1% below the 52-week high, suggesting execution during a period of relative strength for the stock. The company's fundamentals present a material backdrop: net income of $-10,171,000.00 (negative) over the most recent full fiscal year, quarterly revenue of $25,060,000.00 declining 4.7% year-over-year, and a market cap of $1,702,792,563.64. A complete exit by a director from a loss-making, revenue-declining business warrants careful scrutiny, particularly given the scale of the transaction ($5.6M) and the fact that no shares remain post-transaction.

CFO Jeffrey G Winzeler sold 26,000 shares for $1,817,412.26 at AMBQ; sold 20.6% of holdings amid stock surge and operating losses

Jeffrey G Winzeler, Chief Financial Officer of Ambiq Micro, executed 2 separate sales totaling 26,000 shares for $1,817,412.26 on 2026-05-14, reducing his holdings by 20.6% from 126,347 to 100,347 shares. The transactions occurred near the 52-week high of $73.72, with the blended average sale price of $69.90, following a 30-day stock surge of +105.2% and a 90-day gain of +140.8%. This sale occurs against a backdrop of operational headwinds: the company reported a quarterly net loss of $-10,171,000.00 against revenue of $25,060,000.00, with annual revenue declining 4.7% year-over-year and the company unprofitable over its most recent full fiscal year. The timing and magnitude of the position reduction coincide with the stock's proximity to 52-week peaks during a period of negative earnings.

CTO Hanson Scott McLean sells 10,200 shares at blended average $69.24 (3 sales on 2026-05-14); retains 211,226 shares

Hanson Scott McLean (CTO) executed 3 separate sales totaling 10,200 shares for $706,252.22 on May 14, 2026, at prices ranging from $68.62 to $70.50, reducing his post-transaction holdings to 211,226 shares. The sale occurred while the stock is near its 52-week high ($71.34 current price, -3.2% from the $73.72 peak) and amid strong recent momentum (+105.2% in 30 days, +140.8% in 90 days), but the timing aligns with the company's ongoing unprofitability—net income was $-10.2M in the latest quarter with full-year net income negative and annual revenue declining -4.7%. The magnitude of this sale (4.6% reduction in holdings) combined with fundamental weakness suggests a discrete portfolio action by a key technical executive at a point of elevated valuation.

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.

CEO Esaka Fumihide sold 60,000 shares of AMBQ at $70.02 for $4.2M; stock at $71.34, stock up 105.2% in 30 days.

Esaka Fumihide, Chief Executive Officer, sold 60,000 shares at $70.02 on 2026-05-14, reducing his holdings from 511.2K shares to 451.2K shares. The sale occurred at a price near the company's 52-week high of $73.72, concurrent with a 30-day price surge of +105.2% and 90-day gain of +140.8%. The underlying company reported a latest quarterly revenue of $25.1M against a net loss of $-10.2M and annual revenue decline of -4.7%, indicating ongoing operational losses. The magnitude and timing of the sale—an 11.7% reduction of holdings at an elevated price—contrasts with the company's unprofitable fundamentals and weakening revenue trend.