AMPX

Amprius Technologies, Inc.

Latest Form 4:Sale$642KbySun Kang (Director) · filed Aug 25, 2026

Amprius Technologies, Inc. (AMPX) has 38 SEC Form 4 filings (83 transaction rows) in the rolling window, disclosed by 6 distinct insiders. Most recent filing: Aug 25, 2026.

The most active filer is Director Sun Kang with 11 filings. Insiders have net sold $47.8M over the trailing 6 months.

  • Industry:Electrical Equipment & Parts
  • CEO:Thomas Michael Stepien
  • Employees:99
  • HQ:Fremont, CA, US
  • IPO:2022-09-15

Insider Buying

$0

reported purchases (SEC code P)

Insider Selling

$85.7M

reported sales (SEC code S)

Unique Insiders

6

in the rolling window

Market Cap

$1.4B

latest known value

Source
Sale$642KAug 25SEC ↗
Sale$243KAug 25SEC ↗
Sale$80KAug 25SEC ↗
Sale$307KAug 25SEC ↗
Sale$1.5MJun 16SEC ↗
Sale$765KJun 11SEC ↗
Sale$42KJun 5SEC ↗
Sale$6KMay 28SEC ↗
Sale$75KMay 28SEC ↗
Sale$55KMay 28SEC ↗
DIXON DONALD RFirst filing
Sale$320KMay 28SEC ↗
Sale$1.0MMay 26SEC ↗
Stepien Thomas MFirst filing
Sale$898KMay 26SEC ↗
Stefan Constantin IonelFirst in 3 months
Sale$426KMay 26SEC ↗
Sale$23.9MApr 2SEC ↗
Sale$4.1MMar 24SEC ↗
HSIEH Wen HsuanFirst filing
Sale$7.6MMar 13SEC ↗
Chu StevenFirst filing
Sale$3.0MMar 12SEC ↗
Chu StevenFirst filing
Sale$2.9MMar 12SEC ↗
Sale$622KFeb 24SEC ↗
Sale$258KFeb 24SEC ↗
Sale$476KJan 30SEC ↗
Sale$879KJan 23SEC ↗
Sale$5.9MJan 23SEC ↗
Sale$19KJan 23SEC ↗
Sale$10.5MJan 20SEC ↗
Sale$476KJan 20SEC ↗
Sale$5.1MJan 14SEC ↗
Sale$2.1MDec 15SEC ↗
Sale$252KNov 25SEC ↗
Sale$692KNov 25SEC ↗
Sun KangFirst filing
Sale$10.6MNov 19SEC ↗

Related companies

Amprius Technologies, Inc. is in the Manufacturing sector.