Sean Chihhsiang Chen sold $858k of AMBQ
President and COO at Ambiq Micro, Inc.. 15,000 shares at an average of $57.17, traded Sep 4, 2026, filed Sep 9, 2026.
Score components
- +20RolePresident
- +23Trade size$858k at market
- +5Share of holdings soldSold 11% of holdings
- +15Cluster4 insiders selling within 14 days
- -15Exercise and sellShares came from an option exercise in the same filing
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0002078559-26-000008, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Sep 4, 2026 | MOption exercise Common Stock10b5-1 | +15,000 | $8.12 | $122k | 135,275 | 33 d ago |
| Sep 4, 2026 | SOpen-market sale Common Stock10b5-1 | -12,874 | $57.09 | $735k | 122,401 | 33 d ago |
| Sep 4, 2026 | SOpen-market sale Common Stock10b5-1 | -2,126 | $57.68 | $123k | 120,275 | 33 d ago |
| Sep 4, 2026 | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -15,000 | $0.00 | $0 | 149,423 | 33 d ago |
Related signals
Other insiders at Ambiq Micro, Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 53Moderate | Ambiq Micro, Inc. | Jeffrey G Winzeler Chief Financial Officer | $380k 5,455 shares | -5% | |
| 49Moderate | Ambiq Micro, Inc. | Scott McLean Hanson Chief Technology Officer | $604k 8,680 shares | -4% | |
| 65Notable | Ambiq Micro, Inc. | Fumihide Esaka Chief Executive Officer | $1.2M 16,560 shares | -4% | |
| 44Moderate | Ambiq Micro, Inc. | Sean Chihhsiang Chen President and COO | $952k 14,007 shares | -12% | |
| 11Weak | Ambiq Micro, Inc. | Scott McLean Hanson Chief Technology Officer | $422k 7,000 shares | -3% | |
| 60Notable | Ambiq Micro, Inc. | Ker Zhang director | $634k 10,000 shares | -33% | |
| 35Weak | Ambiq Micro, Inc. | Fumihide Esaka Chief Executive Officer | $4.0M 63,500 shares | -12% | |
| 29Weak | Ambiq Micro, Inc. | Sean Chihhsiang Chen President and COO | $902k 15,000 shares | -11% | |
| 15Weak | Ambiq Micro, Inc. | Ker Zhang director | $11k 185 shares | -1% | |
| 35Weak | Ambiq Micro, Inc. | Fumihide Esaka Chief Executive Officer | $6.2M 108,500 shares | -23% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.