Kang Sun is Director at Amprius Technologies, Inc. (AMPX). They have made 14 open-market trades across 1 company since 2024, most recently 2026-08-21.
CIK 0001476220
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 14 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| AMPX | 1,218,397 | $9.4M |
| DSTI | 86,112 | — |
| Total | $9.4M |
Shares reported on the most recent Form 4, priced at the 2026-08-25 close. 1 holding could not be priced and is excluded from the total.
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 |
|---|---|---|---|---|---|---|---|---|
| AMPX | SELL | 2026-08-21 | 2026-08-25 | $10.34 | $642K | -4.0% | -5.7% | — |
| AMPX | SELL | 2026-05-27 | 2026-05-28 | $17.19 | $6K | -15.1% | -34.0% | -50.3% |
| AMPX | SELL | 2026-05-21 | 2026-05-26 | $14.79 | $1.0M | +12.5% | -28.3% | -43.7% |
| AMPX | SELL · 10b5-1 | 2026-04-01 | 2026-04-02 | $15.91 | $23.9M | +13.7% | +26.7% | -15.4% |
| AMPX | SELL · 10b5-1 | 2026-03-23 | 2026-03-24 | $18.80 | $8.2M | -2.9% | +20.1% | -13.5% |
| AMPX | SELL | 2026-02-23 | 2026-02-24 | $10.16 | $622K | +48.9% | +56.4% | +62.3% |
| AMPX | SELL | 2026-01-16 | 2026-01-20 | $11.06 | $11.0M | +8.2% | -10.0% | +70.5% |
| AMPX | SELL | 2026-01-12 | 2026-01-14 | $10.10 | $5.1M | +11.1% | -4.3% | +71.7% |
| AMPX | SELL | 2025-11-21 | 2025-11-25 | $10.08 | $1.4M | +8.1% | -24.3% | -6.6% |
| AMPX | SELL | 2025-11-17 | 2025-11-19 | $10.60 | $10.6M | -5.6% | -18.7% | -15.0% |
| AMPX | SELL | 2025-08-21 | 2025-08-25 | $6.82 | $896K | -6.2% | +46.3% | +42.5% |
| AMPX | SELL | 2025-05-21 | 2025-05-23 | $2.43 | $339K | -9.0% | +19.4% | +134.9% |
| AMPX | SELL | 2025-02-21 | 2025-02-24 | $3.13 | $215K | -28.9% | +9.3% | +0.4% |
| AMPX | SELL | 2024-11-21 | 2024-11-22 | $1.96 | $132K | +4.5% | -5.0% | +66.0% |
| AMPX | SELL | 2024-08-21 | 2024-08-22 | $1.04 | $35K | -13.6% | +7.6% | +83.8% |
| AMPX | SELL | 2024-05-21 | 2024-05-24 | $1.34 | $48K | -9.4% | -16.1% | -28.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.