Amprius Technologies, Inc. (AMPX) insider trading

By person

15 insiders · 127 transactions

19.3×

Thomas M. Stepien holds 19.3 times base salary in stock. $6.18M of shares against $319.71K in salary for 2025.

Salary from the company's own proxy. The shares are what Thomas M. Stepien last reported holding, valued at $10.03, the price Common stock was last bought or sold at on the open market here, on 24 Aug 2026.

Insider

Role

Bought

Sold

Net

Holding

Of company

Worth

Change

Kang Sun

Director

—

$58.50M (20) scheduled

−$58.50M

1,274,803

0.8727%

$12.79M

—

Constantin Ionel Stefan

Chief Technology Officer

—

$11.24M (19) scheduled

−$11.24M

771,629

0.5282%

$7.74M

+1,357%

Wen Hsuan HSIEH

Director

—

$7.62M (2) scheduled

−$7.62M

44,444

0.0304%

$445.77K

—

Steven Chu

Director

—

$5.86M (4) scheduled

−$5.86M

137,762

0.0943%

$1.38M

+5,410%

Justin E Mirro

Director

—

$5.06M (32)

−$5.06M

1,337,895

0.9159%

$13.42M

+12.0%

Jonathan Bornstein

President of Amprius Lab

—

$4.84M (25) scheduled

−$4.84M

1,463,618

1.00%

$14.68M

+1,205%

Donald R Dixon

Director

—

$2.54M (3)

−$2.54M

639,459

0.4377%

$6.41M

+9.4%

Thomas M Stepien

Chief Executive Officer

—

$1.34M (5)

−$1.34M

616,010

0.4217%

$6.18M

+6,060%

Amprius, Inc. entity

10% owner

—

$1.09M (5)

−$1.09M

2,500,071

1.71%

$25.08M

−96.2%

Sandra Wallach

Chief Financial Officer

—

$394.67K (7)

−$394.67K

1,005,275

0.6882%

$10.08M

—

Ricardo C. Rodriguez

Chief Financial Officer

—

350,000

0.2396%

$3.51M

—

Livingston Satterthwaite

Director

—

346,506

0.2372%

$3.48M

+3,920%

Kathleen A Bayless

Director

—

216,120

0.1479%

$2.17M

—

Mary Gustanski

Director

—

146,396

0.1002%

$1.47M

—

Kensington Capital Sponsor IV LLC entity

Former 10% holder (see ftn 2)

—

0.0000%

$0.00

−100.0%

Amprius Technologies, Inc.

What the insiders did Net selling

By person