Amprius Technologies (AMPX) insider trading in the last 6 months

Form 4 filings, newest first

Quality Score today -3

4 insiders sold $6.3M. No buys.

SellKang Sun$642KDirectorat $10.34 on Aug 21, filed Aug 25

SellKang SunDirector$642Kat $10.34 on Aug 21, filed Aug 25

SellConstantin Ionel Stefan$307KChief Technology Officerat $10.34 on Aug 21, filed Aug 25

SellConstantin Ionel StefanChief Technology Officer$307Kat $10.34 on Aug 21, filed Aug 25

SellThomas M. Stepien$243KChief Executive Officerat $10.34 on Aug 21, filed Aug 25

SellThomas M. StepienChief Executive Officer$243Kat $10.34 on Aug 21, filed Aug 25

From SEC Form 4s, the newest filed Aug 25, 2026 · Insiders have 2 business days to file a trade

11 more filings on AMPX in the last 6 months, for Pro members. See them free →

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Who files at Amprius Technologies

Thomas M. StepienChief Executive Officer · 5 sales
Constantin Ionel StefanChief Technology Officer · 3 sales
Kang SunDirector · 3 sales
Donald R. DixonDirector · 2 sales
Donald R. DixonDirector · 1 sale

Insider trades by person

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Questions about AMPX's insider trades

As of Nov 2, 2026: Amprius Technologies (AMPX) has 14 insider filings on record in the last 6 months, the newest filed Aug 25, 2026. Its Quality Score is -3 (Poor). Scores as of 5:08 PM ET, 15 minutes behind.

Are AMPX insiders buying or selling?

4 insiders sold $6.3M across 14 filings in the last 6 months. No open-⁠market buys on record. The newest filing: Kang Sun, Director, sold $642K on Aug 21, 2026.

Who are AMPX's biggest insider sellers?

By the dollars of their sales in the last 6 months: Donald R. Dixon (Director), 2 sales; Kang Sun (Director), 3 sales; Thomas M. Stepien (Chief Executive Officer), 5 sales. 4 insiders sold in all.

When did an AMPX insider last buy?

No AMPX insider bought shares on the open market in the last 6 months, as filed on Form 4. The newest filing is a sale by Kang Sun on Aug 21, 2026.

Amprius Technologies's page has its Quality Score, its chart, and its earnings. More in Industrials and Miscellaneous Electrical Machinery, Equipment & Supplies.