SEC Form 4Coverage since May 21, 2026
$AMPX insider trading
Over the last 12 months, Amprius Technologies insiders reported no purchases and 10 sales totaling $5.0M across SEC Form 4 filings.
- Bought · 12m
- — 0 events
- Sold · 12m
- $5.0M 10 events
- Events · 12m
- 10 Form 4 filings, grouped
- Insiders · 12m
- 4 distinct reporters
- 10b5-1 share
- 0% pre-arranged plans
Side
Price · $AMPX · 12Mvia TradingView
Top insiders · 12m
Stepien Thomas MChief Executive Officer3× · $1.0M
DIXON DONALD R—3× · $2.5M
Stefan Constantin IonelChief Technology Officer2× · $481K
Sun Kang—2× · $1.0M
All insider trades
10 events
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Jun 15, 2026 | DIXON DONALD RD | ▼ Sale | 85,000 | $17.17 | $1.5M | -19.1% | indirect |
| Jun 9, 2026 | DIXON DONALD RD | ▼ Sale | 40,000 | $19.13 | $765K | -8.3% | indirect |
| Jun 4, 2026 | Stepien Thomas MChief Executive Officer · O·D | ▼ Sale | 2,000 | $20.97 | $42K | -0.3% | — |
| May 27, 2026 | Stepien Thomas MChief Executive Officer · O·D | ▼ Sale | 4,375 | $17.19 | $75K | -0.6% | — |
| May 27, 2026 | Stefan Constantin IonelChief Technology Officer · O | ▼ Sale | 3,208 | $17.19 | $55K | -0.4% | — |
| May 27, 2026 | Sun KangD | ▼ Sale | 356 | $17.19 | $6K | — | — |
| May 26, 2026 | DIXON DONALD RD | ▼ Sale | 17,895 | $17.9 | $320K | -3.6% | indirect |
| May 21, 2026 | Sun KangD | ▼ Sale | 67,796 | $14.79 | $1.0M | -5% | — |
| May 21, 2026 | Stefan Constantin IonelChief Technology Officer · O | ▼ Sale | 28,812 | $14.79 | $426K | -3.5% | — |
| May 21, 2026 | Stepien Thomas MChief Executive Officer · O·D | ▼ Sale | 60,702 | $14.79 | $898K | -8% | — |
About Form 4
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $AMPX feed.