AMPX
insider transactionsAmprius Technologies, Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 90d
-1.8M
0 buy · 1.8M sell
Net value · 90d
-$28.9M
$0 in · $28.9M out
Sentiment · 90d
Net selling
0% buying · 100% selling
Open-market trades · 90d
12
0 buy · 1.8M sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
Transactions · 90d
-
Sell·S
Director
$1.5M
85.0K sh · $17.17
Own -19%
-
Grant·A
Director
$0
10.4K sh
Own +3%
-
Grant·A
Director
$0
10.4K sh
Own +8%
-
Grant·A
Director
$0
10.4K sh
Own +5%
-
Grant·A
Director
$0
10.4K sh
Own +4%
-
Sell·S
Director
$765.2K
40.0K sh · $19.13
Own -8%
-
Sell·S
Stepien Thomas M KEY
Chief Executive Officer
$41.9K
2.0K sh · $20.97
Own -0%
-
Other·G
Stepien Thomas M KEY
Chief Executive Officer
$0
104.2K sh · 3 lots
Own -74%
-
Sell·S
Stepien Thomas M KEY
Chief Executive Officer
$75.2K
4.4K sh · $17.19
Own -1%
-
Sell·S
Chief Technology Officer
$55.2K
3.2K sh · $17.19
Own -0%
-
Sell·S
Director
$6.1K
356 sh · $17.19
Own -0%
-
Sell·S
Director
$320.3K
17.9K sh · $17.90
Own -4%
-
Sell·S
Stepien Thomas M KEY
Chief Executive Officer
$897.7K
60.7K sh · $14.79
Own -8%
-
Sell·S
Chief Technology Officer
$426.1K
28.8K sh · $14.79
Own -3%
-
Sell·S
Director
$1.0M
67.8K sh · $14.79
Own -5%
-
Grant·A
Director
$0
6.2K sh
Own +0%
-
Exercise·M
Director
$3.0M
1.5M sh · $2.02 avg · 2 lots
Own +523%
-
Sell·S
Director
$23.9M
1.5M sh · $15.91 avg · 2 lots
Own -53%
-
Exercise·M
Director
$3.0M
1.5M sh · $2.02 avg · 2 lots
Own +112%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 15, 2026 | DIXON DONALD R | Sell S | 85.0K | $1.5M |
| Jun 12, 2026 | SATTERTHWAITE LIVINGSTON | Grant A | 10.4K | $0 |
| Jun 12, 2026 | Chu Steven | Grant A | 10.4K | $0 |
| Jun 12, 2026 | BAYLESS KATHLEEN A | Grant A | 10.4K | $0 |
| Jun 12, 2026 | DIXON DONALD R | Grant A | 10.4K | $0 |
| Jun 9, 2026 | DIXON DONALD R | Sell S | 40.0K | $765.2K |
| Jun 4, 2026 | Stepien Thomas M KEY | Sell S | 2.0K | $41.9K |
| Jun 4, 2026 | Stepien Thomas M KEY | Other G | 104.2K3 lots | $0 |
| May 27, 2026 | Stepien Thomas M KEY | Sell S | 4.4K | $75.2K |
| May 27, 2026 | Stefan Constantin Ionel | Sell S | 3.2K | $55.2K |
| May 27, 2026 | Sun Kang | Sell S | 356 | $6.1K |
| May 26, 2026 | DIXON DONALD R | Sell S | 17.9K | $320.3K |
| May 21, 2026 | Stepien Thomas M KEY | Sell S | 60.7K | $897.7K |
| May 21, 2026 | Stefan Constantin Ionel | Sell S | 28.8K | $426.1K |
| May 21, 2026 | Sun Kang | Sell S | 67.8K | $1.0M |
| May 5, 2026 | Sun Kang | Grant A | 6.2K | $0 |
| Apr 1, 2026 | Sun Kang | Exercise M | 1.5M2 lots | $3.0M |
| Apr 1, 2026 | Sun Kang | Sell S | 1.5M2 lots | $23.9M |
| Apr 1, 2026 | Sun Kang | Exercise M | 1.5M2 lots | $3.0M |
Buy Sell Non-market (grant · exercise · gift)
About AMPX insider trading
This page tracks insider transactions for Amprius Technologies, Inc. (AMPX) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.