Sean Chihhsiang Chen sold $952k of AMBQ
President and COO at Ambiq Micro, Inc.. 14,007 shares at an average of $67.95, traded Oct 2, 2026, filed Oct 6, 2026.
Score components
- +20RolePresident
- +24Trade size$952k at market
- +5Share of holdings soldSold 12% of holdings
- +15Cluster4 insiders selling within 14 days
- -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 0002078559-26-000014, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Oct 2, 2026 | SOpen-market sale Common Stock10b5-1 | -2,492 | $69.11 | $172k | 117,783 | 7 d ago |
| Oct 2, 2026 | SOpen-market sale Common Stock10b5-1 | -3,008 | $69.77 | $210k | 114,775 | 7 d ago |
| Oct 2, 2026 | SOpen-market sale Common Stock10b5-1 | -302 | $71.86 | $22k | 114,473 | 7 d ago |
| Oct 5, 2026 | SOpen-market sale Common Stock10b5-1 | -5,508 | $66.38 | $366k | 108,965 | 7 d ago |
| Oct 5, 2026 | SOpen-market sale Common Stock10b5-1 | -1,797 | $67.29 | $121k | 107,168 | 7 d ago |
| Oct 5, 2026 | SOpen-market sale Common Stock10b5-1 | -800 | $68.08 | $54k | 106,368 | 7 d ago |
| Oct 5, 2026 | SOpen-market sale Common Stock10b5-1 | -100 | $69.51 | $6,951 | 106,268 | 7 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% | |
| 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% | |
| 28Weak | Ambiq Micro, Inc. | Sean Chihhsiang Chen President and COO | $858k 15,000 shares | -11% | |
| 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.