The insider selling is trivial in size and likely driven by option exercises and routine portfolio rebalancing. No bearish signal. Monitor the next quarterly filing for any fundamental deterioration, but this cluster alone does not warrant action.
Price Chart
Executive Summary
A cluster of insider selling at Ambiq Micro, led by the President/COO and CEO, totaling ~$827K in open-market sales over a 7-day window. The President/COO exercised and immediately sold options, while the CEO and a director also sold. At ~0.06% of the $1.4B market cap, the dollar value is trivial and likely reflects routine post-vesting diversification, not a bearish signal.
Key Financial Metrics
Key Facts
- President/COO Chen sold ~$858K in open-market shares on 2026-09-04, including shares from exercised options at $8.12 and $0 strike.
- CEO Esaka sold 1.5K shares for ~$82K on 2026-09-02.
- Director Zhang sold 185 shares for ~$11K on 2026-09-04 after exercising options at $0 and $5.88.
- Total open-market sales: ~$827K, representing ~0.06% of AMBQ's $1.4B market cap — well below the 0.1% materiality threshold.
- All three insiders sold near the same price (~$56-57), suggesting coordinated blackout-window opening or shared vesting schedule, not a shared bearish view.
Financial Impact
Total insider sales of ~$827K, or ~0.06% of market cap — immaterial relative to company size.
Risk Factors
- Insider selling could accelerate if the stock continues to trade near recent highs (~$57).
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-AMBQ-1789027536583 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 16, 2026 10d ago | Insider Cluster | $49.62 | awaiting T+20 | — | $51.06 (−2.90%) |
Sep 17, 2026 5w ago | Insider Cluster | $65.46 $49.88 | ▲ +23.80% | ▲ +24.01% | $51.06 (+22.00%) |
Sep 15, 2026 5w ago | Insider Cluster | $59.90 $51.55 | ▲ +13.94% | ▲ +16.00% | $51.06 (+14.76%) |
Sep 9, 2026 6w ago | Insider Cluster | $60.66 $58.90 | ▼ −2.90% | ▼ −5.28% | $51.06 (−15.83%) |
Sep 2, 2026 7w ago | Insider Cluster | $56.43 $68.18 | ▲ +20.82% | ▲ +22.01% | $51.06 (−9.52%) |
Aug 18, 2026 9w ago | Insider Cluster | $59.19 $62.35 | ▲ +5.34% | ▲ +6.18% | $51.06 (−13.74%) |
Aug 15, 2026 10w ago | Institutional Cluster | $67.86 $60.85 | ▼ −10.33% | ▼ −8.35% | $51.06 (−24.76%) |
Aug 11, 2026 10w ago | 8-K | $65.29 $63.77 | ▼ −2.33% | ▼ −1.27% | $51.06 (−21.80%) |
Jul 30, 2026 12w ago | 8-K | $63.23 $60.09 | ▼ −4.97% | ▼ −8.93% | $51.06 (−19.25%) |
Jun 24, 2026 17w ago | EFFECT | $81.18 $77.55 | ▼ −4.47% | ▼ −6.40% | $51.06 (−37.10%) |
US Market Status
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