AMPX
Amprius Technologies, Inc.$9.16-0.01 (-0.05%)Prev Close$9.17·MCap$1.30B·P/E—·Vol2.64M·Yield—
▲
Buys (12M)
0
$0.00
▼
Sells (12M)
31
$109.07M
◆
Net Activity
Net Seller
$109.07M
●
Active Insiders
6
last 12 mo
Over the past 12 months, insider activity at Amprius Technologies, Inc. (AMPX) has been exclusively selling, with 0 insider purchases totaling $0.00 and 31 insider sales totaling $109.07M. The most recent insider transaction was by Sun Kang (director), who sold $642.2K worth of shares on Aug 25, 2026. Amprius Technologies, Inc. operates in the Industrials sector, within the Electrical Equipment & Parts industry, with a market cap of $1.30B.
AMPX Insider Trading Activity
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Aug 25, 2026 | Sun Kang | director | Sell | 62,101 | $10.34 | $642.2K | 1,218,397 |
| Aug 25, 2026 | Stepien Thomas M | director, officer: Chief Executive Officer | Sell | 31,529 | $10.26 | $323.6K | 602,096 |
| Aug 25, 2026 | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 29,681 | $10.34 | $306.9K | 771,629 |
| Jun 16, 2026 | DIXON DONALD R | director | Sell | 85,000 | $17.17 | $1.46M | 359,380 |
| Jun 11, 2026 | DIXON DONALD R | director | Sell | 40,000 | $19.13 | $765.2K | 444,380 |
| Jun 5, 2026 | Stepien Thomas M | director, officer: Chief Executive Officer | Sell | 2,000 | $20.97 | $41.9K | 625,625 |
| May 28, 2026 | DIXON DONALD R | director | Sell | 17,895 | $17.90 | $320.3K | 484,380 |
| May 28, 2026 | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 3,208 | $17.19 | $55.2K | 801,310 |
| May 28, 2026 | Sun Kang | director | Sell | 356 | $17.19 | $6.1K | 1,280,498 |
| May 28, 2026 | Stepien Thomas M | director, officer: Chief Executive Officer | Sell | 4,375 | $17.19 | $75.2K | 694,923 |
| May 26, 2026 | Stepien Thomas M | director, officer: Chief Executive Officer | Sell | 60,702 | $14.79 | $897.7K | 699,298 |
| May 26, 2026 | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 28,812 | $14.79 | $426.1K | 804,518 |
| May 26, 2026 | Sun Kang | director | Sell | 67,796 | $14.79 | $1.00M | 1,280,854 |
| Apr 2, 2026 | Sun Kang | director | Sell | 1,500,000 | $15.91 | $23.86M1.1% OS | 1,591,437-49% |
| Mar 24, 2026 | Sun Kang | director | Sell | 217,869 | $18.80 | $4.10M | 121,452-64% |
| Mar 13, 2026 | HSIEH Wen Hsuan | director | Sell | 413,146 | $18.44 | $7.62M | 175,090-70% |
| Mar 12, 2026 | Chu Steven | director | Sell | 322,197 | $18.20 | $5.86M | 182,904-64% |
| Feb 24, 2026 | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 25,366 | $10.16 | $257.6K | 723,330 |
| Feb 24, 2026 | Sun Kang | director | Sell | 61,251 | $10.16 | $622.0K | 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 | 566,107 | $12.03 | $6.81M | 748,696-43% |
| 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 | $10.99M0.7% OS | 1,403,651-41% |
| Jan 16, 2026 | Sun Kang | Director | Sell | 993,733 | $11.06 | $10.99M0.7% OS | 0 |
| Jan 14, 2026 | Sun Kang | director | Sell | 506,267 | $10.10 | $5.11M | 1,403,651-27% |
| 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 | $10.60M0.7% OS | 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 | $641.9K0.5% OS | 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 |
Showing 1–50 of 70
1 / 2
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 |
|---|---|---|---|---|---|---|---|
| Aug 25, 2026 | Sun Kang | director | Sell | 62,101 | $10.34 | $642.2K | 1,218,397 |
| Aug 25, 2026 | Stepien Thomas M | director, officer: Chief Executive Officer | Sell | 31,529 | $10.26 | $323.6K | 602,096 |
| Aug 25, 2026 | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 29,681 | $10.34 | $306.9K | 771,629 |
| Jun 16, 2026 | DIXON DONALD R | director | Sell | 85,000 | $17.17 | $1.46M | 359,380 |
| Jun 11, 2026 | DIXON DONALD R | director | Sell | 40,000 | $19.13 | $765.2K | 444,380 |
| Jun 5, 2026 | Stepien Thomas M | director, officer: Chief Executive Officer | Sell | 2,000 | $20.97 | $41.9K | 625,625 |
| May 28, 2026 | DIXON DONALD R | director | Sell | 17,895 | $17.90 | $320.3K | 484,380 |
| May 28, 2026 | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 3,208 | $17.19 | $55.2K | 801,310 |
| May 28, 2026 | Sun Kang | director | Sell | 356 | $17.19 | $6.1K | 1,280,498 |
| May 28, 2026 | Stepien Thomas M | director, officer: Chief Executive Officer | Sell | 4,375 | $17.19 | $75.2K | 694,923 |
| May 26, 2026 | Stepien Thomas M | director, officer: Chief Executive Officer | Sell | 60,702 | $14.79 | $897.7K | 699,298 |
| May 26, 2026 | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 28,812 | $14.79 | $426.1K | 804,518 |
| May 26, 2026 | Sun Kang | director | Sell | 67,796 | $14.79 | $1.00M | 1,280,854 |
| Apr 2, 2026 | Sun Kang | director | Sell | 1,500,000 | $15.91 | $23.86M1.1% OS | 1,591,437-49% |
| Mar 24, 2026 | Sun Kang | director | Sell | 217,869 | $18.80 | $4.10M | 121,452-64% |
| Mar 13, 2026 | HSIEH Wen Hsuan | director | Sell | 413,146 | $18.44 | $7.62M | 175,090-70% |
| Mar 12, 2026 | Chu Steven | director | Sell | 322,197 | $18.20 | $5.86M | 182,904-64% |
| Feb 24, 2026 | Stefan Constantin Ionel | officer: Chief Technology Officer | Sell | 25,366 | $10.16 | $257.6K | 723,330 |
| Feb 24, 2026 | Sun Kang | director | Sell | 61,251 | $10.16 | $622.0K | 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 | 566,107 | $12.03 | $6.81M | 748,696-43% |
| 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 | $10.99M0.7% OS | 1,403,651-41% |
| Jan 16, 2026 | Sun Kang | Director | Sell | 993,733 | $11.06 | $10.99M0.7% OS | 0 |
| Jan 14, 2026 | Sun Kang | director | Sell | 506,267 | $10.10 | $5.11M | 1,403,651-27% |
| 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 | $10.60M0.7% OS | 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 | $641.9K0.5% OS | 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 |
AMPX Insiders
Similar Stocks to AMPX
VRT
Vertiv Holdings Co
$234.66-1.15%
$101.21B
BE
Bloom Energy Corporation
$258.25+0.62%
$79.31B
AME
AMETEK, Inc.
$233.85+0.09%
$54.15B
HUBB
Hubbell Incorporated
$438.01-0.99%
$24.32B
AYI
Acuity Brands, Inc.
$301.48-2.38%
$9.55B
POWL
Powell Industries, Inc.
$171.52+0.50%
$6.65B
ATKR
Atkore Inc.
$94.53+0.48%
$3.18B
HAYW
Hayward Holdings, Inc.
$12.68-1.40%
$2.95B