Ambarella Inc
AMBACIK 0001280263 · Every Form 4 filed by insiders at this issuer. See financials →
Annual report (10-K)
Latest 10-K filed Mar 23, 2026. Sentiment + YoY language diff vs prior year. Read sections →
Signal:NeutralFull-doc fallback
Full filing:tone -0.0158
Sentiment via Loughran-McDonald lexicon · YoY diff via Jaccard similarity + paragraph set difference.
Recent 8-K announcements
Per-item disclosure feed. Item 2.02 is the earnings release.
Top insiders
Most active reporters at Ambarella Inc
| Name | Roles | Filings |
|---|---|---|
| Ju Chi-Hong | Officer | 37 |
| Day Christopher | Officer | 30 |
| Lee Chan W | Officer | 28 |
| Wang Feng-Ming | OfficerDirector | 27 |
| Kohn Leslie | OfficerDirector | 22 |
Showing 1-5 of 19
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Top performers
Insiders ranked by realized 90-day signed return on their open-market trades at Ambarella Inc. Minimum 3 scored trades. Returns are signed - a sale followed by a rally counts against the insider.
| # | Insider | Trades | Win rate | Avg | Median | Best | Worst |
|---|---|---|---|---|---|---|---|
| 1 | Lee Chan W | 27 | 74% | +16.5% | +24.7% | +47.1% | -54.2% |
| 2 | Ju Chi-Hong | 33 | 73% | +14.1% | +15.3% | +60.9% | -54.2% |
| 3 | Chen Yun-Lung | 6 | 83% | +8.7% | +10.6% | +34.4% | -26.3% |
| 4 | Paisley Christopher B | 10 | 80% | +7.2% | +13.1% | +34.4% | -37.4% |
| 5 | White Brian C | 5 | 40% | +6.3% | 0.0% | +29.7% | -12.4% |
| 6 | Day Christopher | 26 | 62% | +5.8% | +6.1% | +41.6% | -54.2% |
| 7 | Schwarting Elizabeth M | 13 | 62% | +3.0% | +4.5% | +31.7% | -42.8% |
| 8 | Kohn Leslie | 16 | 56% | +0.3% | +1.7% | +29.7% | -54.2% |
| 9 | Wang Feng-Ming | 24 | 42% | -6.3% | -5.3% | +29.7% | -54.2% |
| 10 | Young John Alexander | 11 | 55% | -1.9% | +2.6% | +26.5% | -54.2% |
All filings
263 Form 4 / 4-A filings, newest first
| Filed | Top transaction | Shares | Price | Value | ||
|---|---|---|---|---|---|---|