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Amprius Technologies, Inc.

AMPX Net selling

CIK 0001899287 #2254 in the set updated 17 Sep 2026

Bought (1 mo)

$0.00

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

Sold (1 mo)

$1.27M

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

Sold at will

$1.27M

4 of 4 sales

Net

−$1.27M

−$1.27M against sales at will

By person

12 insiders · 4 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

—

$642.19K (1)

−$642.19K

1,274,803

0.8727%

$12.79M

−5.6%

Stepien Thomas M

Chief Executive Officer

—

$323.55K (2)

−$323.55K

616,010

0.4217%

$6.18M

+6,060%

Stefan Constantin Ionel

Chief Technology Officer

—

$306.93K (1)

−$306.93K

771,629

0.5282%

$7.74M

+75.7%

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%

DIXON DONALD R

Director

—

639,459

0.4377%

$6.41M

−12.1%

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%

Chu Steven

Director

—

137,762

0.0943%

$1.38M

−5.2%

HSIEH Wen Hsuan

Director

—

44,444

0.0304%

$445.77K

−68.9%

Individual transactions

Nothing of that kind in this period.

What was left out

Form 4 filings counted 3

Amendments (4/A) skipped 0

Filings about a different issuer 0

Unreadable filings 0

Joint filings 0

Sales on a Rule 10b5-1 plan 0

Sales straight out of an exercise 0

Sales at will 4

Transactions with no price 0

Shares from compensation/vesting 15,692

History held since 16 Sep 2022