AMPX
IndustrialsAmprius Technologies, Inc.
$17.85-0.44 (-2.41%)
Prev Close
$18.29
Open
$18.23
High
$19.04
Low
$17.63
Volume
7.00M
Market Cap
$2.28B
P/E
—
Div Yield
—
Over the past 12 months, insider activity at Amprius Technologies, Inc. (AMPX) has been exclusively selling, with 0 insider purchases totaling $0.00 and 21 insider sales totaling $69.13M. The most recent insider transaction was by Chu Steven (director), who sold $5.86M worth of shares on Mar 12, 2026. Amprius Technologies, Inc. operates in the Industrials sector, within the Electrical Equipment & Parts industry, with a market cap of $2.28B.
Buys (12M)
0
$0.00
Sells (12M)
21
$69.13M
Net Activity
Net Seller
$69.13M
Active Insiders
4
last 12 mo
AMPX Price Chart
AMPX Insider Trading Activity
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Mar 12, 2026↗ | Chu Steven | director | Sell | 322,197 | $18.20 | $5.86M | 182,904 |
| Feb 24, 2026↗ | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 50,732 | $10.16 | $515.2K | 723,330 |
| Feb 24, 2026↗ | Sun Kang | director | Sell | 122,502 | $10.16 | $1.24M | 1,342,400 |
| Jan 30, 2026↗ | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 39,690 | $12.00 | $476.4K | 748,696 |
| Jan 28, 2026↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 39,690 | $12.00 | $476.4K | 0 |
| Jan 23, 2026↗ | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 567,707 | $12.03 | $6.83M | 748,696 |
| Jan 21, 2026↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 567,707 | $12.03 | $6.83M | 0 |
| Jan 20, 2026↗ | Sun Kang | director | Sell | 993,733 | $11.06 | $10.99M | 1,403,650 |
| Jan 16, 2026↗ | Sun Kang | Director | Sell | 993,733 | $11.06 | $10.99M | 0 |
| Jan 14, 2026↗ | Sun Kang | director | Sell | 506,267 | $10.10 | $5.11M | 1,403,650 |
| Jan 12, 2026↗ | Sun Kang | Director | Sell | 506,267 | $10.10 | $5.11M | 0 |
| Dec 11, 2025↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 198,255 | $10.51 | $2.08M | 0 |
| Nov 21, 2025↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 25,024 | $10.08 | $252.3K | 0 |
| Nov 21, 2025↗ | Sun Kang | Chief Executive Officer | Sell | 68,655 | $10.08 | $692.1K | 0 |
| Nov 17, 2025↗ | Sun Kang | Chief Executive Officer | Sell | 1,000,000 | $10.60 | $10.60M | 0 |
| Aug 21, 2025↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 19,159 | $6.82 | $130.6K | 0 |
| Aug 21, 2025↗ | Sun Kang | Chief Executive Officer | Sell | 65,654 | $6.82 | $447.5K | 0 |
| Aug 21, 2025↗ | Wallach Sandra | Chief Financial Officer | Sell | 28,390 | $6.82 | $193.5K | 0 |
| May 21, 2025↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 20,366 | $2.43 | $49.5K | 0 |
| May 21, 2025↗ | Sun Kang | Chief Executive Officer | Sell | 69,786 | $2.43 | $169.7K | 0 |
| May 21, 2025↗ | Wallach Sandra | Chief Financial Officer | Sell | 27,595 | $2.43 | $67.1K | 0 |
| Feb 21, 2025↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 13,527 | $3.13 | $42.4K | 0 |
| Feb 21, 2025↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 9,066 | $3.13 | $28.4K | 0 |
| Feb 21, 2025↗ | Sun Kang | Chief Executive Officer | Sell | 34,353 | $3.13 | $107.6K | 0 |
| Feb 21, 2025↗ | Wallach Sandra | Chief Financial Officer | Sell | 18,142 | $3.13 | $56.8K | 0 |
| Nov 21, 2024↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 8,575 | $1.96 | $16.8K | 0 |
| Nov 21, 2024↗ | Sun Kang | Chief Executive Officer | Sell | 33,779 | $1.96 | $66.4K | 0 |
| Nov 21, 2024↗ | Wallach Sandra | Chief Financial Officer | Sell | 17,158 | $1.96 | $33.7K | 0 |
| Nov 20, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 166,706 | $1.93 | $322.0K | 0 |
| Sep 3, 2024↗ | MIRRO JUSTIN E | Director | Sell | 710,000 | $0.90 | $641.9K | 0 |
| Aug 21, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 18,644 | $1.04 | $19.4K | 0 |
| Aug 21, 2024↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 8,800 | $1.04 | $9.2K | 0 |
| Aug 21, 2024↗ | Sun Kang | Chief Executive Officer | Sell | 33,333 | $1.04 | $34.7K | 0 |
| Aug 21, 2024↗ | Wallach Sandra | Chief Financial Officer | Sell | 17,606 | $1.04 | $18.3K | 0 |
| Jun 12, 2024↗ | MIRRO JUSTIN E | Director | Sell | 800,000 | $1.22 | $973.2K | 0 |
| May 21, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 19,902 | $1.34 | $26.7K | 0 |
| May 21, 2024↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 9,393 | $1.34 | $12.6K | 0 |
| May 21, 2024↗ | Sun Kang | See Remarks | Sell | 35,584 | $1.34 | $47.7K | 0 |
| May 21, 2024↗ | Wallach Sandra | Chief Financial Officer | Sell | 18,794 | $1.34 | $25.2K | 0 |
| Apr 2, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 125,983 | $2.38 | $299.6K | 0 |
| Mar 5, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 150,000 | $2.88 | $432.0K | 0 |
| Feb 6, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 150,000 | $4.43 | $663.8K | 0 |
| Jan 2, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 150,000 | $4.44 | $666.3K | 0 |
| Dec 12, 2023↗ | MIRRO JUSTIN E | Director | Sell | 405,000 | $3.62 | $1.47M | 0 |
| Dec 5, 2023↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 150,000 | $4.05 | $608.1K | 0 |
| Dec 5, 2023↗ | MIRRO JUSTIN E | Director | Sell | 90,000 | $4.08 | $367.6K | 0 |
| Nov 28, 2023↗ | MIRRO JUSTIN E | Director | Sell | 150,000 | $3.97 | $595.7K | 0 |
| Nov 20, 2023↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 27,631 | $3.84 | $106.1K | 0 |
| Nov 7, 2023↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 122,369 | $3.00 | $366.7K | 0 |
| Oct 10, 2023↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 150,000 | $4.22 | $632.4K | 0 |
| Sep 19, 2023↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 150,000 | $4.36 | $654.6K | 0 |
| Sep 14, 2023↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 80,000 | $3.75 | $300.2K | 0 |
| Jun 14, 2023↗ | MIRRO JUSTIN E | Director | Sell | 111,000 | $9.14 | $1.02M | 0 |
| Dec 14, 2022↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 209 | $7.20 | $1.5K | 0 |
AMPX Insider Buying Activity
The following table shows recent insider purchases of Amprius Technologies, Inc. (AMPX) stock reported via SEC Form 4 filings.
No insider buying activity found for AMPX in the last 12 months.
AMPX Insider Selling Activity
The following table shows recent insider sales of Amprius Technologies, Inc. (AMPX) stock reported via SEC Form 4 filings.
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Mar 12, 2026↗ | Chu Steven | director | Sell | 322,197 | $18.20 | $5.86M | 182,904 |
| Feb 24, 2026↗ | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 50,732 | $10.16 | $515.2K | 723,330 |
| Feb 24, 2026↗ | Sun Kang | director | Sell | 122,502 | $10.16 | $1.24M | 1,342,400 |
| Jan 30, 2026↗ | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 39,690 | $12.00 | $476.4K | 748,696 |
| Jan 28, 2026↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 39,690 | $12.00 | $476.4K | 0 |
| Jan 23, 2026↗ | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 567,707 | $12.03 | $6.83M | 748,696 |
| Jan 21, 2026↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 567,707 | $12.03 | $6.83M | 0 |
| Jan 20, 2026↗ | Sun Kang | director | Sell | 993,733 | $11.06 | $10.99M | 1,403,650 |
| Jan 16, 2026↗ | Sun Kang | Director | Sell | 993,733 | $11.06 | $10.99M | 0 |
| Jan 14, 2026↗ | Sun Kang | director | Sell | 506,267 | $10.10 | $5.11M | 1,403,650 |
| Jan 12, 2026↗ | Sun Kang | Director | Sell | 506,267 | $10.10 | $5.11M | 0 |
| Dec 11, 2025↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 198,255 | $10.51 | $2.08M | 0 |
| Nov 21, 2025↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 25,024 | $10.08 | $252.3K | 0 |
| Nov 21, 2025↗ | Sun Kang | Chief Executive Officer | Sell | 68,655 | $10.08 | $692.1K | 0 |
| Nov 17, 2025↗ | Sun Kang | Chief Executive Officer | Sell | 1,000,000 | $10.60 | $10.60M | 0 |
| Aug 21, 2025↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 19,159 | $6.82 | $130.6K | 0 |
| Aug 21, 2025↗ | Sun Kang | Chief Executive Officer | Sell | 65,654 | $6.82 | $447.5K | 0 |
| Aug 21, 2025↗ | Wallach Sandra | Chief Financial Officer | Sell | 28,390 | $6.82 | $193.5K | 0 |
| May 21, 2025↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 20,366 | $2.43 | $49.5K | 0 |
| May 21, 2025↗ | Sun Kang | Chief Executive Officer | Sell | 69,786 | $2.43 | $169.7K | 0 |
| May 21, 2025↗ | Wallach Sandra | Chief Financial Officer | Sell | 27,595 | $2.43 | $67.1K | 0 |
| Feb 21, 2025↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 13,527 | $3.13 | $42.4K | 0 |
| Feb 21, 2025↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 9,066 | $3.13 | $28.4K | 0 |
| Feb 21, 2025↗ | Sun Kang | Chief Executive Officer | Sell | 34,353 | $3.13 | $107.6K | 0 |
| Feb 21, 2025↗ | Wallach Sandra | Chief Financial Officer | Sell | 18,142 | $3.13 | $56.8K | 0 |
| Nov 21, 2024↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 8,575 | $1.96 | $16.8K | 0 |
| Nov 21, 2024↗ | Sun Kang | Chief Executive Officer | Sell | 33,779 | $1.96 | $66.4K | 0 |
| Nov 21, 2024↗ | Wallach Sandra | Chief Financial Officer | Sell | 17,158 | $1.96 | $33.7K | 0 |
| Nov 20, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 166,706 | $1.93 | $322.0K | 0 |
| Sep 3, 2024↗ | MIRRO JUSTIN E | Director | Sell | 710,000 | $0.90 | $641.9K | 0 |
| Aug 21, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 18,644 | $1.04 | $19.4K | 0 |
| Aug 21, 2024↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 8,800 | $1.04 | $9.2K | 0 |
| Aug 21, 2024↗ | Sun Kang | Chief Executive Officer | Sell | 33,333 | $1.04 | $34.7K | 0 |
| Aug 21, 2024↗ | Wallach Sandra | Chief Financial Officer | Sell | 17,606 | $1.04 | $18.3K | 0 |
| Jun 12, 2024↗ | MIRRO JUSTIN E | Director | Sell | 800,000 | $1.22 | $973.2K | 0 |
| May 21, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 19,902 | $1.34 | $26.7K | 0 |
| May 21, 2024↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 9,393 | $1.34 | $12.6K | 0 |
| May 21, 2024↗ | Sun Kang | See Remarks | Sell | 35,584 | $1.34 | $47.7K | 0 |
| May 21, 2024↗ | Wallach Sandra | Chief Financial Officer | Sell | 18,794 | $1.34 | $25.2K | 0 |
| Apr 2, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 125,983 | $2.38 | $299.6K | 0 |
| Mar 5, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 150,000 | $2.88 | $432.0K | 0 |
| Feb 6, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 150,000 | $4.43 | $663.8K | 0 |
| Jan 2, 2024↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 150,000 | $4.44 | $666.3K | 0 |
| Dec 12, 2023↗ | MIRRO JUSTIN E | Director | Sell | 405,000 | $3.62 | $1.47M | 0 |
| Dec 5, 2023↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 150,000 | $4.05 | $608.1K | 0 |
| Dec 5, 2023↗ | MIRRO JUSTIN E | Director | Sell | 90,000 | $4.08 | $367.6K | 0 |
| Nov 28, 2023↗ | MIRRO JUSTIN E | Director | Sell | 150,000 | $3.97 | $595.7K | 0 |
| Nov 20, 2023↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 27,631 | $3.84 | $106.1K | 0 |
| Nov 7, 2023↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 122,369 | $3.00 | $366.7K | 0 |
| Oct 10, 2023↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 150,000 | $4.22 | $632.4K | 0 |
| Sep 19, 2023↗ | Bornstein Jonathan | President of Amprius Lab | Sell | 150,000 | $4.36 | $654.6K | 0 |
| Sep 14, 2023↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 80,000 | $3.75 | $300.2K | 0 |
| Jun 14, 2023↗ | MIRRO JUSTIN E | Director | Sell | 111,000 | $9.14 | $1.02M | 0 |
| Dec 14, 2022↗ | Stefan Constantin Ionel | Chief Technology Officer | Sell | 209 | $7.20 | $1.5K | 0 |
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