AMBQ Ambiq Micro, Inc.
Price Chart
Executive Summary
CEO Fumihide Esaka and President/COO Sean Chen sold a combined $6.48M in open-market shares at ~$70, just days after Ambiq reported a strong Q1 beat (revenue +59% YoY, EPS beat of $0.27) and guided Q2 ~50% YoY growth. Both sales follow the exercise and immediate sale of vested options, and the cluster is consistent with routine post-blackout-window portfolio diversification rather than an informed negative signal.
Key Financial Metrics
Actionable Insight
The cluster is consistent with routine post-earnings-blackout-window selling after a strong pop — both executives exercised cheap options and sold a portion of the resulting shares. This is NOT an urgent bearish signal. However, the historical win rate for prior AMBQ directional calls is 0% (mean T+20 -14%), suggesting low informational value in timing-based reads on this name. Traders should treat this as noise and wait for the next fundamental catalyst (Q2 results or product cycle or next earnings).
Key Facts
- CEO Esaka sold 60,000 shares for $4.20M on May 14 at $70.02
- President/COO Chen sold 32,351 shares for $2.28M on May 15 at $70.53
- Both sales were preceded by derivative exercises (non-cash grants and cash exercises at $8.12 and $5.88 strike prices)
- Total open-market sale value of $6.48M represents ~0.4% of $1.5B market cap — modest and within routine range
- sell-to-cover
- range for post-vesting diversification
- The cluster occurred 6 days after a strong Q1 earnings beat (revenue $25.06M, +59% YoY) that drove the stock above $70 (up from ~$60 pre-earnings)
- No buying activity by any insider in the window — all insider activity is sell-side activity was option-exercise-driven
Financial Impact
$6.48M in open-market sales = 0.4% of $1.5B market cap (modest proportion)
Risk Factors
- Both top two operating executives sold into strength, which could dampen sentiment among retail momentum traders
- If insider selling continues into the next 30 days at elevated volumes (>$10M cumulative), it would warrant a reassessment
- Strong Q1 results were already priced in; guidance implied ~50% growth but no upward revision beyond initial guide — potential peak growth narrative risk
Market Snapshot
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-AMBQ-1779140961416 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
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May 18, 2026
27d ago
|
Insider Cluster
| $71.14 $80.57 | ▲ +13.26% | ▲ +10.96% | $84.72 (+19.09%) |
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May 18, 2026
27d ago
|
Insider Cluster
| $71.14 $80.57 | ▲ +13.26% | ▲ +10.96% | $84.72 (+19.09%) |
|
May 12, 2026
4w ago
|
8-K
| $66.37 $71.34 | ▲ +7.49% | ▲ +7.41% | $84.72 (+27.65%) |
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Apr 22, 2026
7w ago
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DEFA14A
| $35.08 $34.75 | ▼ −0.94% | ▼ −2.42% | $84.72 (+141.51%) |
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Mar 5, 2026
14w ago
|
8-K
| $30.06 $26.92 | ▼ −10.45% | ▼ −8.21% | $84.72 (+181.84%) |
US Market Status
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