Form4insider filings, from the source

Insider · CIK 0001940928

Constantin Ionel Stefan

Files at: AMPX. On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $307k · 1net −$307k
$10k$10k$100k$100k$1M$1MbuyssalesAug 20Aug 20Aug 20Aug 21Aug 21Aug 21Aug 22

Reported trades — common stock

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Aug 21, 2026 SForm 4 →Aug 25, 5:22 pm EDTAmprius Technologies, Inc.AMPX29,681$10.34$306,931771,629−3.70%

Reported trades — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.