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Amprius Technologies, Inc.

AMPX Net selling

CIK 0001899287 #2254 in the set updated 17 Sep 2026

Bought (12 mo)

$0.00

out of their own pocket, the only kind of buying there is

Sold (12 mo)

$85.68M

$0.00 on a plan · $73.44M straight out of an exercise

Sold at will

$12.24M

20 of 37 sales

Net

−$85.68M

−$12.24M against sales at will

By person

12 insiders · 37 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

Sun Kang

Director

—

$57.62M (13) scheduled

−$57.62M

1,274,803

0.8727%

$12.79M

−5.6%

Stefan Constantin Ionel

Chief Technology Officer

—

$10.69M (10) scheduled

−$10.69M

771,629

0.5282%

$7.74M

+75.7%

HSIEH Wen Hsuan

Director

—

$7.62M (2) scheduled

−$7.62M

44,444

0.0304%

$445.77K

−68.9%

Chu Steven

Director

—

$5.86M (4) scheduled

−$5.86M

137,762

0.0943%

$1.38M

−5.2%

DIXON DONALD R

Director

—

$2.54M (3)

−$2.54M

639,459

0.4377%

$6.41M

−12.1%

Stepien Thomas M

Chief Executive Officer

—

$1.34M (5)

−$1.34M

616,010

0.4217%

$6.18M

+6,060%

Amprius, Inc. entity

10% owner

—

2,500,071

1.71%

$25.08M

−96.2%

Bornstein Jonathan

President of Amprius Lab

—

1,463,618

1.00%

$14.68M

−10.8%

Wallach Sandra

Chief Financial Officer

—

1,005,275

0.6882%

$10.08M

+40.9%

RODRIGUEZ RICARDO C.

Chief Financial Officer

—

350,000

0.2396%

$3.51M

—

SATTERTHWAITE LIVINGSTON

Director

—

346,506

0.2372%

$3.48M

+18.8%

BAYLESS KATHLEEN A

Director

—

216,120

0.1479%

$2.17M

+34.0%

Individual transactions

Insider

Date

Role

Action

Price

Amount

Sun Kang

1 Apr 2026

Director

Sold after exercise

249,037

$16.78

$4.18M

Sun Kang

1 Apr 2026

Director

Sold after exercise

1,250,963

$15.73

$19.68M

Chu Steven

12 Mar 2026

Director

Sold after exercise

5,565

$18.53

$103.15K

Chu Steven

12 Mar 2026

Director

Sold after exercise

50,000

$18.21

$910.74K

Chu Steven

12 Mar 2026

Director

Sold after exercise

100,000

$18.65

$1.86M

HSIEH Wen Hsuan

12 Mar 2026

Director

Sold after exercise

130,646

$18.22

$2.38M

HSIEH Wen Hsuan

12 Mar 2026

Director

Sold after exercise

282,500

$18.55

$5.24M

Chu Steven

10 Mar 2026

Director

Sold after exercise

166,632

$17.92

$2.99M

Stefan Constantin Ionel

28 Jan 2026

Chief Technology Officer

Sold after exercise

39,690

$12.00

$476.35K

Stefan Constantin Ionel

23 Jan 2026

Chief Technology Officer

Sold after exercise

1,600

$12.00

$19.20K

Stefan Constantin Ionel

22 Jan 2026

Chief Technology Officer

Sold after exercise

492,827

$12.04

$5.93M

Stefan Constantin Ionel

21 Jan 2026

Chief Technology Officer

Sold after exercise

73,280

$12.00

$879.41K

Sun Kang

20 Jan 2026

Director

Sold after exercise

43,185

$11.03

$476.27K

Sun Kang

16 Jan 2026

Director

Sold after exercise

950,548

$11.07

$10.52M

Sun Kang

12 Jan 2026

Director

Sold after exercise

506,267

$10.10

$5.11M

Stefan Constantin Ionel

11 Dec 2025

Chief Technology Officer

Sold after exercise

198,255

$10.51

$2.08M

Sun Kang

17 Nov 2025

Chief Executive Officer

Sold after exercise

1,000,000

$10.60

$10.60M

Show all 37 transactions →

Amprius Technologies, Inc.

By person

Individual transactions

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