Monitor for any upcoming earnings pre-announcement or material news that could explain the synchronized C-suite selling. The lack of a 10b5-1 plan designation makes these sales more informative than routine plan-driven sales.
Price Chart
Executive Summary
Two C-suite insiders at Ambarella (COO and CFO) sold a combined $390K in open-market sales on the same day, September 17, 2026. While the dollar amount is modest relative to the company's market cap, the fact that both the COO and CFO sold on the same day at the same price warrants attention, though the lack of a 10b5-1 plan indication and the relatively small size keep the signal from being strongly bearish.
Key Financial Metrics
Key Facts
- COO Lee Chan W sold 2,900 shares for $188K on 2026-09-17
- CFO Young John Alexander sold 3,100 shares for $203K on 2026-09-17
- Total insider sales: $390K, both open-market (code S) with no 10b5-1 plan indicated
- Both sales executed at $64.83 per share on the same day
Financial Impact
Total insider sales of $390K represent a modest fraction of Ambarella's market cap, likely below 0.1%.
Risk Factors
- Insider selling could signal management's view that the stock is fairly valued or that headwinds are ahead
- Synchronized C-suite sales may precede a negative catalyst such as a guidance miss or product delay
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-AMBA-1789764658509 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 28, 2026 29d ago | Insider Cluster | $68.73 | awaiting T+20 | — | $66.82 (−2.78%) |
Sep 25, 2026 4w ago | 144 | $72.68 $66.50 | ▼ −8.50% | ▼ −7.03% | $66.82 (−8.06%) |
Sep 21, 2026 5w ago | Insider Cluster | $67.06 $63.22 | ▲ +5.73% | ▲ +5.17% | $66.82 (+0.36%) |
Sep 18, 2026 5w ago | Insider Cluster | $68.85 $62.76 | ▲ +8.85% | ▲ +7.94% | $66.82 (+2.95%) |
Aug 11, 2026 10w ago | Press Release | $83.53 | awaiting T+20 | — | $66.82 (−20.00%) |
Jul 2, 2026 16w ago | Insider Cluster | $79.73 $82.68 | ▲ +3.70% | ▲ +2.85% | $66.82 (−16.19%) |
May 28, 2026 21w ago | Insider Cluster | $72.18 $67.01 | ▼ −7.16% | ▼ −5.37% | $66.82 (−7.43%) |
May 28, 2026 21w ago | 8-K | $72.18 $67.01 | ▼ −7.16% | ▼ −5.37% | $66.82 (−7.43%) |
May 15, 2026 23w ago | DEFA14A | $78.88 $67.12 | ▼ −14.91% | ▼ −16.49% | $66.82 (−15.29%) |
May 4, 2026 25w ago | Press Release | $70.72 | awaiting T+20 | — | $66.82 (−5.51%) |
US Market Status
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