AMBA — AMBARELLA INC
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2016-01-04.
Performance
Technicals
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Measured signals that fired on AMBA
| date | signal | measured base rate |
|---|---|---|
| 2026-08-18 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-08-03 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-06-30 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-06-24 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-06-18 | Cluster sale: three or more insiders insider | -0.37% over 21 days · t = -3.38 · n = 21,542 statistically distinguishable from its control group |
| 2026-06-01 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-07-09 | Chen Yun-Lung VP, Business Dev. & Marketing | Open-market sale | 6.0K | 78.66 | 468.7K |
| 2026-07-01 | Wang Feng-Ming CEO | Open-market sale 10b5-1 plan | 16.2K | 90.08 | 1.5M |
| 2026-07-01 | Ju Chi-Hong Senior VP, Systems & GM | Open-market sale | 10.0K | 88.84 | 888.4K |
| 2026-06-26 | PAISLEY CHRISTOPHER B Director | Open-market sale 10b5-1 plan | 250 | 62.01 | 15.5K |
| 2026-06-17 | Wang Feng-Ming CEO | Open-market sale | 6.2K | 67.87 | 421.1K |
| 2026-06-17 | Young John Alexander CFO | Open-market sale 10b5-1 plan | 3.2K | 67.87 | 216.2K |
| 2026-06-17 | Lee Chan W Chief Operations Officer | Open-market sale | 3.0K | 67.87 | 200.3K |
| 2026-06-17 | Ju Chi-Hong Senior VP, Systems & GM | Open-market sale | 2.0K | 67.87 | 136.9K |
| 2026-06-17 | Young John Alexander CFO | Open-market sale 10b5-1 plan | 1.8K | 66.98 | 123.7K |
| 2026-06-17 | Wang Feng-Ming CEO | Gift | 10.0K | 0.00 | 0 |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| BlackRock, Inc. | 195.0M | 3.8M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 191.3M | 3.7M |
| STATE STREET CORP | 101.7M | 2.0M |
| VANGUARD CAPITAL MANAGEMENT LLC | 93.4M | 1.8M |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | 81.6M | 1.6M |
| MILLENNIUM MANAGEMENT LLC | 77.9M | 1.5M |
| GEODE CAPITAL MANAGEMENT, LLC | 53.0M | 1.0M |
| CITADEL ADVISORS LLC | 48.0M | 931.9K |
| Legal & General Group Plc | 47.7M | 926.4K |
| MORGAN STANLEY | 37.3M | 724.7K |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
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