Christopher Day is VP at AMBARELLA INC (AMBA). They have made 114 open-market trades across 1 company since 2013, most recently 2025-06-17.
CIK 0001558685
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 114 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| AMBA | 15,099 | $931K |
Shares reported on the most recent Form 4, priced at the 2025-06-20 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| AMBA | SELL | 2025-06-17 | 2025-06-20 | $52.26 | $18K | +28.9% | +35.9% | +61.0% |
| AMBA | SELL | 2025-03-18 | 2025-03-20 | $55.02 | $26K | -5.3% | -22.2% | -0.8% |
| AMBA | SELL | 2025-03-06 | 2025-03-07 | $55.11 | $46K | +6.6% | -19.4% | -0.0% |
| AMBA | SELL | 2025-01-03 | 2025-01-07 | $78.10 | $195K | +12.5% | +7.0% | -43.3% |
| AMBA | SELL | 2024-12-18 | 2024-12-20 | $75.40 | $134K | +8.5% | +15.6% | -23.6% |
| AMBA | SELL | 2024-12-16 | 2024-12-18 | $75.41 | $36K | +4.1% | +15.7% | -23.0% |
| AMBA | SELL | 2024-12-02 | 2024-12-03 | $71.61 | $183K | +0.3% | +2.5% | -21.4% |
| AMBA | SELL | 2024-10-03 | 2024-10-04 | $58.00 | $168K | +3.0% | +2.6% | +33.2% |
| AMBA | SELL | 2024-09-17 | 2024-09-19 | $53.54 | $26K | -1.3% | +4.3% | +27.0% |
| AMBA | SELL | 2024-07-08 | 2024-07-10 | $61.66 | $174K | -5.8% | -29.6% | -8.0% |
| AMBA | SELL | 2024-06-18 | 2024-06-20 | $55.48 | $27K | +0.5% | +4.2% | -3.4% |
| AMBA | SELL | 2024-03-18 | 2024-03-20 | $49.27 | $20K | -5.5% | -20.9% | +6.4% |
| AMBA | SELL | 2024-03-08 | 2024-03-11 | $57.16 | $17K | -9.0% | -14.1% | +3.7% |
| AMBA | SELL | 2023-12-19 | 2023-12-21 | $63.04 | $23K | -13.6% | -9.7% | -19.6% |
| AMBA | SELL | 2023-09-18 | 2023-09-20 | $57.30 | $20K | -2.1% | -7.2% | +17.4% |
| AMBA | SELL | 2023-07-12 | 2023-07-14 | $82.50 | $377K | -1.4% | -11.1% | -33.7% |
| AMBA | SELL | 2023-06-20 | 2023-06-20 | $84.80 | $30K | +2.7% | -2.0% | -28.9% |
| AMBA | SELL | 2023-06-13 | 2023-06-14 | $86.94 | $261K | -5.6% | -5.2% | -32.8% |
| AMBA | SELL | 2023-06-09 | 2023-06-12 | $82.97 | $711K | -10.5% | -4.3% | -31.7% |
| AMBA | SELL | 2023-04-13 | 2023-04-14 | $69.24 | $509K | -3.8% | +1.2% | +25.3% |
| AMBA | SELL | 2023-03-17 | 2023-03-17 | $76.85 | $186K | -1.4% | -11.0% | +12.2% |
| AMBA | SELL | 2023-03-09 | 2023-03-10 | $82.25 | $29K | +1.7% | -4.6% | +9.6% |
| AMBA | SELL | 2022-12-16 | 2022-12-20 | $82.07 | $492K | -3.6% | +1.6% | -5.8% |
| AMBA | SELL | 2022-12-14 | 2022-12-15 | $90.82 | $212K | -8.6% | +4.7% | -8.8% |
| AMBA | SELL | 2022-09-16 | 2022-09-20 | $63.25 | $42K | -11.5% | -17.7% | +25.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.