Form4insider filings, from the source

Insider · CIK 0001721580

David H Wang

Files at: ACMR. On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $10.6M · 1net −$10.6M
$10k$10k$1M$1M$100M$100MbuyssalesJun 27Jul 12Jul 27Aug 12Aug 27Sep 12Sep 27

Reported trades — common stock

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Sep 8, 2026 SForm 4 →Sep 10, 4:30 pm EDTACM Research, Inc.ACMR140,000$75.93$10,630,010802,708−14.9%10b5-1
Sep 8, 2026 MForm 4 →Sep 10, 4:30 pm EDTACM Research, Inc.ACMR140,000$1.00$140,000872,708—10b5-1

Reported trades — derivatives (options, RSUs, warrants)

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Sep 8, 2026 MForm 4 →Sep 10, 4:30 pm EDTACM Research, Inc.ACMR140,000——130,000—10b5-1