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Sean Chihhsiang Chen, President and COO at Ambiq Micro, sold AMBQ on Sep 4, 2026

Data as of Oct 16

▼ SELL$735K12,874 shares at $57.09Sean Chihhsiang Chen President and COOAMBQ Ambiq Micro, Inc.
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Traded
Sep 4, 2026
Disclosed
Sep 9, 2026
Filed
5 days after the trade · late

Form 4s are due within two business days.

Official filing (SEC Form 4) ↗

The price around the disclosure

Sean Chihhsiang Chen, President and COO at Ambiq Micro, sold AMBQ on Sep 4, 2026TRADEDDISCLOSED
AMBQSimilar stocks (XLK — its sector index fund), rebased to AMBQ's price on the disclosure day
AMBQ since disclosure
−21.8%
after the sale
Similar stocks (XLK) since disclosure
−2.3%
XLK — its sector index fund

Change in closing price from Sep 9, 2026 (the first trading day on or after disclosure) to Oct 16, 2026. Dividends excluded. Not a return anyone earned.

Our take

None of our tested rules fired on this trade.

Other trades in the same filing

  1. ▼ SELLSean Chihhsiang Chen President and COOAMBQ Ambiq Micro, Inc.$123Kdisclosed Sep 9 · filed 5 days after the trade · late

See every trade on AMBQ →