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AMPX — Amprius Technologies, Inc.

Information Technology · Miscellaneous Electrical Machinery, Equipment & Supplies · NYSE

CIK 0001899287 · FYE 1231 · All Form 4 filings on EDGAR ↗

Formerly: Kensington Capital Acquisition Corp. IV (until 2022-09-14)

3Insiders filing
9Transactions
+$0Reported buys
−$1.3MReported sells
1Cluster events

Window in data: 2026-08-21 → 2026-08-25 · Data as of 2026-08-28

Cluster membership

WeekWindowTierDirInsidersTotal value
2026-W342026-08-21 → 2026-08-21WATCH− sell3$1.2M

Insiders

InsiderRoleTxnsReported value
Sun KangDirector1$642k
Stepien Thomas MChief Executive Officer7$324k
Stefan Constantin IonelChief Technology Officer1$307k

Transaction history

Filing dateTrade dateTickerInsiderTypeSharesPriceValueCluster
2026-08-252026-08-25AMPXStepien Thomas M Chief Executive OfficerG5,000———
2026-08-252026-08-25AMPXStepien Thomas M Chief Executive OfficerG5,000———
2026-08-252026-08-25AMPXStepien Thomas M Chief Executive OfficerG5,000———
2026-08-252026-08-25AMPXStepien Thomas M Chief Executive OfficerG346———
2026-08-252026-08-25AMPXStepien Thomas M Chief Executive OfficerA routine346———
2026-08-252026-08-24AMPXStepien Thomas M Chief Executive OfficerS8,000$10.03−$80k—
2026-08-252026-08-21AMPXStepien Thomas M Chief Executive OfficerS23,529$10.34−$243k✓ Cluster clu-02af4750ee34
2026-08-252026-08-21AMPXStefan Constantin Ionel Chief Technology OfficerS29,681$10.34−$307k✓ Cluster clu-02af4750ee34
2026-08-252026-08-21AMPXSun Kang DirectorS62,101$10.34−$642k✓ Cluster clu-02af4750ee34