AMPX
Amprius Technologies, Inc.
Amprius Technologies, Inc. (AMPX) has 8 SEC Form 4 filings (37 transaction rows) in the rolling window, disclosed by 5 distinct insiders. Most recent filing: Jun 11, 2026.
The most active filer is Director Sun Kang with 5 filings. Insiders have net sold $30.6M over the trailing 6 months.
- Industry:Electrical Equipment & Parts
- CEO:Thomas Michael Stepien
- Employees:99
- HQ:Fremont, CA, US
- IPO:2022-09-15
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$41.2M
reported sales (SEC code S)
Unique Insiders
5
in the rolling window
Market Cap
$1.6B
latest known value
| Source | ||||||
|---|---|---|---|---|---|---|
DIXON DONALD RFirst filing | Director | Sale | 40,000 | $765K | Jun 11 | SEC ↗ |
Stepien Thomas MFirst filing | Chief Executive Officer | Sale | 2,000 | $42K | Jun 5 | SEC ↗ |
Sun KangFirst in 4 months | Director | Sale | 67,796 | $1.0M | May 26 | SEC ↗ |
Chu StevenFirst filing | Director | Sale | 166,632 | $3.0M | Mar 12 | SEC ↗ |
Chu StevenFirst filing | Director | Sale | 155,565 | $2.9M | Mar 12 | SEC ↗ |
Stefan Constantin IonelFirst filing | Chief Technology Officer | Sale | 73,280 | $879K | Jan 23 | SEC ↗ |
Stefan Constantin IonelFirst filing | Chief Technology Officer | Sale | 492,827 | $5.9M | Jan 23 | SEC ↗ |
Stefan Constantin IonelFirst filing | Chief Technology Officer | Sale | 1,600 | $19K | Jan 23 | SEC ↗ |
| Director | Sale | 950,548 | $10.5M | Jan 20 | SEC ↗ | |
| Director | Sale | 43,185 | $476K | Jan 20 | SEC ↗ | |
| Director | Sale | 506,267 | $5.1M | Jan 14 | SEC ↗ | |
Sun KangFirst filing | Chief Executive Officer | Sale | 1,000,000 | $10.6M | Nov 19 | SEC ↗ |
Related companies
Amprius Technologies, Inc. is in the Manufacturing sector.