ACMR insider trading — ACM Research, Inc.
No open-market insider purchases or sales were filed for ACM Research, Inc. (ACMR) in the last 90 days. Other insider transactions — such as stock awards, option exercises or tax withholding — are listed below.
Updated Oct 16, 2026.
Recent ACMR insider transactions
Every Form 4 filed by ACM Research, Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Sep 9, 2026 | Wang David H | See Remarks | M · Option exercise · 10b5-1 | Direct | 70,000 | $1.00 | $70K | Form 4 |
| Sep 9, 2026 | Wang David H | See Remarks | S · Sale · 10b5-1 | Direct | 70,000 | $74.59 | $5.22M | Form 4 |
| Sep 8, 2026 | Wang David H | See Remarks | M · Option exercise · 10b5-1 | Direct | 70,000 | $1.00 | $70K | Form 4 |
| Sep 8, 2026 | Wang David H | See Remarks | S · Sale · 10b5-1 | Direct | 70,000 | $77.26 | $5.41M | Form 4 |
| Aug 20, 2026 | Mckechnie Mark | See Remarks | M · Option exercise · 10b5-1 | Direct | 55,199 | $16.95 | $936K | Form 4 |
| Aug 20, 2026 | Mckechnie Mark | See Remarks | S · Sale · 10b5-1 | Direct | 55,199 | $77.27 | $4.26M | Form 4 |
| Aug 18, 2026 | Dun Haiping | Director | M · Option exercise · 10b5-1 | Direct | 5,000 | $5.60 | $28K | Form 4 |
| Aug 18, 2026 | Dun Haiping | Director | S · Sale · 10b5-1 | Direct | 5,000 | $81.13 | $406K | Form 4 |
ACMR insider trading FAQ
Are insiders buying ACMR stock?
Not on the open market. In the last 90 days, ACM Research, Inc. insiders made no open-market purchases, and no open-market sales. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading ACMR?
No insider bought or sold on the open market in the last 90 days.
Where does ACMR insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
More stocks with insider activity
Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.