Form4.ai tracks every SEC insider trade in real time. See every ACMR insider filing with a free account — no card.
See every ACMR insider filing — free account, no card.
Free accountACM Research, Inc. (ACMR) has 6 SEC Form 4 insider filings on record in the last 90 days. Most recent filing: Sept. 10, 2026.
Open-market value, last 90 days
No open-market buys or sales in this period.
Form 4 filings by type, last 90 days
| Date | Insider | Trade | Value | Price since buy |
|---|---|---|---|---|
| Sep 10, 2026 SEC filing | Wang David H See Remarks | Vest & sell-to-cover | 0 sh | — |
| Aug 21, 2026 SEC filing | McKechnie Mark See Remarks | Cashless exercise | $3,189,142 | — |
Create a free account to see all 6 ACMR filings from the last 90 days. No card needed.
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Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.