Jonathan Bornstein is President at Amprius Technologies, Inc. (AMPX). They have made 4 open-market trades across 1 company since 2023, most recently 2025-03-10.
CIK 0001942459
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 4 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| AMPX | 422,668 | $3.3M |
Shares reported on the most recent Form 4, priced at the 2025-03-12 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| AMPX | SELL | 2025-02-21 | 2025-02-24 | $3.13 | $42K | -28.9% | +9.3% | +0.4% |
| AMPX | SELL | 2024-11-20 | 2024-11-22 | $1.92 | $578K | +4.5% | -5.0% | +66.0% |
| AMPX | SELL | 2024-08-21 | 2024-08-22 | $1.04 | $19K | -13.6% | +7.6% | +83.8% |
| AMPX | SELL | 2024-05-21 | 2024-05-24 | $1.34 | $27K | -9.4% | -16.1% | -28.2% |
| AMPX | SELL · 10b5-1 | 2024-04-02 | 2024-04-03 | $2.38 | $600K | -21.9% | -3.9% | -46.1% |
| AMPX | SELL · 10b5-1 | 2024-03-05 | 2024-03-07 | $2.86 | $544K | -1.1% | -22.7% | -49.1% |
| AMPX | SELL · 10b5-1 | 2024-02-06 | 2024-02-07 | $4.43 | $665K | -10.3% | -39.3% | -52.7% |
| AMPX | SELL · 10b5-1 | 2024-01-02 | 2024-01-04 | $4.44 | $1.3M | +0.4% | -16.3% | -52.7% |
| AMPX | SELL · 10b5-1 | 2023-12-05 | 2023-12-07 | $4.05 | $1.2M | -4.2% | +21.4% | -29.0% |
| AMPX | SELL · 10b5-1 | 2023-11-20 | 2023-11-21 | $3.84 | $212K | +11.5% | -6.3% | -1.5% |
| AMPX | SELL · 10b5-1 | 2023-11-07 | 2023-11-09 | $3.00 | $733K | +25.0% | +28.2% | +41.3% |
| AMPX | SELL · 10b5-1 | 2023-10-10 | 2023-10-12 | $4.21 | $1.3M | -27.8% | -12.7% | +18.6% |
| AMPX | SELL · 10b5-1 | 2023-09-19 | 2023-09-21 | $4.37 | $1.3M | +26.1% | -22.3% | -9.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.