Chan W. Lee is COO at AMBARELLA INC (AMBA). They have made 28 open-market trades across 1 company since 2021, most recently 2026-09-17.
CIK 0001882825
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 28 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| AMBA | 154,443 | $9.5M |
Shares reported on the most recent Form 4, priced at the 2026-09-18 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| AMBA | SELL | 2026-09-17 | 2026-09-18 | $64.83 | $188K | +3.6% | — | — |
| AMBA | SELL | 2026-06-17 | 2026-06-18 | $67.87 | $200K | +23.7% | -7.9% | -12.1% |
| AMBA | SELL | 2026-03-17 | 2026-03-19 | $53.25 | $552K | -7.8% | +6.1% | +18.0% |
| AMBA | SELL | 2025-12-17 | 2025-12-19 | $71.82 | $346K | +2.3% | -10.6% | -24.0% |
| AMBA | SELL | 2025-09-17 | 2025-09-19 | $79.43 | $309K | +2.1% | +1.4% | -15.5% |
| AMBA | SELL | 2025-06-17 | 2025-06-20 | $52.26 | $167K | +28.9% | +35.9% | +61.0% |
| AMBA | SELL | 2025-03-18 | 2025-03-20 | $55.02 | $162K | -5.3% | -22.2% | -0.8% |
| AMBA | SELL | 2025-03-06 | 2025-03-07 | $55.11 | $232K | +6.6% | -19.4% | -0.0% |
| AMBA | SELL | 2025-01-15 | 2025-01-17 | $76.56 | $153K | -4.6% | +0.3% | -47.4% |
| AMBA | SELL | 2025-01-10 | 2025-01-14 | $74.43 | $223K | -3.3% | +0.6% | -41.0% |
| AMBA | SELL | 2025-01-06 | 2025-01-08 | $77.12 | $231K | +10.0% | +2.2% | -45.6% |
| AMBA | SELL | 2025-01-02 | 2025-01-03 | $74.19 | $148K | -1.2% | -4.9% | -42.8% |
| AMBA | SELL | 2024-12-16 | 2024-12-18 | $75.41 | $224K | +4.1% | +15.7% | -23.0% |
| AMBA | SELL | 2024-09-17 | 2024-09-19 | $53.54 | $160K | -1.3% | +4.3% | +27.0% |
| AMBA | SELL | 2024-06-18 | 2024-06-20 | $55.48 | $167K | +0.5% | +4.2% | -3.4% |
| AMBA | SELL | 2024-03-18 | 2024-03-20 | $49.27 | $106K | -5.5% | -20.9% | +6.4% |
| AMBA | SELL | 2024-03-08 | 2024-03-11 | $57.16 | $37K | -9.0% | -14.1% | +3.7% |
| AMBA | SELL | 2023-12-19 | 2023-12-21 | $63.04 | $192K | -13.6% | -9.7% | -19.6% |
| AMBA | SELL | 2023-09-18 | 2023-09-20 | $57.30 | $170K | -2.1% | -7.2% | +17.4% |
| AMBA | SELL | 2023-06-20 | 2023-06-20 | $84.80 | $253K | +2.7% | -2.0% | -28.9% |
| AMBA | SELL | 2023-03-17 | 2023-03-17 | $76.85 | $1.4M | -1.4% | -11.0% | +12.2% |
| AMBA | SELL | 2022-12-16 | 2022-12-20 | $83.77 | $344K | -3.6% | +1.6% | -5.8% |
| AMBA | SELL | 2022-09-16 | 2022-09-20 | $63.25 | $131K | -11.5% | -17.7% | +25.5% |
| AMBA | SELL | 2022-06-16 | 2022-06-17 | $66.25 | $145K | -5.3% | -2.2% | -5.6% |
| AMBA | SELL | 2022-03-16 | 2022-03-18 | $91.20 | $2.9M | +6.9% | -9.0% | -33.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.