How many insider trades does FilingIQ track for AMPX?

FilingIQ tracks 229 Form 4 insider transactions for AMPX (Amprius Technologies, Inc.), covering filings from Sep 14, 2022 onwards. 29 of those were filed in the last 90 days.

Are AMPX insiders net buyers or net sellers?

Across the full Form 4 history for AMPX, 0 transactions (0%) were open-market purchases and 108 (47%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.

Where does AMPX insider data come from?

Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.

What sector is AMPX in?

Amprius Technologies, Inc. (AMPX) is classified in the Industrials sector, specifically Electrical Equipment & Parts, with a current market capitalisation of $1.41B.

AMPX insider trading

NYSE Industrials

Amprius Technologies, Inc. — scored insider trade history from SEC Form 4 filings, parsed and contextualised by FilingIQ.

Total Form 4 trades

229

Last 90 days

Buys / sells

0% / 47%

Market cap

$1.41B

About Amprius Technologies, Inc.

Amprius Technologies, Inc. develops, manufactures, and markets lithium-ion batteries for mobility applications. The company offers silicon anode lithium-ion batteries under the SiCore and SiMaxx product platforms. Its batteries are primarily used for existing and emerging aviation applications, including unmanned aerial systems, such as drones and high-altitude pseudo satellites. The company was founded in 2008 and is headquartered in Fremont, California.

Company website: amprius.com

AMPX insider activity at a glance

FilingIQ has scored 229 insider transactions for AMPX since Sep 14, 2022. The most recent filing in our index is dated May 5, 2026.

Across the full history, 0 open-market purchases and 108 open-market sales were filed under transaction codes P and S respectively. Compensatory share awards (code A) and option exercises (code M) are tracked separately and not counted here.

The average FilingIQ composite score on AMPX insider trades is 61.3/100, produced by FilingIQ's multi-factor Form 4 model. Model framework documented at methodology.

View live AMPX trades on FilingIQ Raw filings on SEC EDGAR

Latest AMPX Form 4 filings

Stefan Constantin Ionel Chief Technology Officer

S Jan 22, 2026

Sun Kang Chief Executive Officer

S Nov 21, 2025

Sun Kang Chief Executive Officer

S Nov 17, 2025

Bornstein Jonathan President of Amprius Lab

S Nov 20, 2024

Stefan Constantin Ionel Chief Technology Officer

S Sep 15, 2023

Most recent disclosures. Sign up to filter by score, transaction code, or insider role.

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Frequently asked

How many insider trades does FilingIQ track for AMPX?: FilingIQ tracks 229 Form 4 insider transactions for AMPX (Amprius Technologies, Inc.), covering filings from Sep 14, 2022 onwards. 29 of those were filed in the last 90 days.
Are AMPX insiders net buyers or net sellers?: Across the full Form 4 history for AMPX, 0 transactions (0%) were open-market purchases and 108 (47%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.
Where does AMPX insider data come from?: Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.
What sector is AMPX in?: Amprius Technologies, Inc. (AMPX) is classified in the Industrials sector, specifically Electrical Equipment & Parts, with a current market capitalisation of $1.41B.

Methodology & sources

Every AMPX insider transaction shown on FilingIQ is parsed directly from a public SEC Form 4 XML filing. Insider identity is normalised across reporting variants (CIK changes, name spellings, related-party indirect holdings). The FilingIQ composite score is documented in full on the team page and algo disclosure. Not investment advice; see disclaimer.