StockCIK 1680062
ACM Research, Inc. (ACMR): Insider Trades and Fund Holdings
In the past 12 months, ACM Research, Inc. insiders reported 0 open-market purchases worth $0 and 4 sales worth $15.3M; 4 of the sales were reported as made under a 10b5-1 trading plan.
0Insider buys, 12 months
$0Bought by insiders, 12 months
$15.3MSold by insiders, 12 months
2Tracked funds holding
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Sep 10, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Sep 10 | David H. WangSee Remarks | ▼ SELL10b5-1 | $5.41M |
| Sep 10 | David H. WangSee Remarks | ▼ SELL10b5-1 | $5.22M |
| Aug 21 | Mark McKechnieSee Remarks | ▼ SELL10b5-1 | $4.26M |
| Aug 20 | Haiping DunDirector | ▼ SELL10b5-1 | $406K |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings
Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| David H. Wang | See Remarks | 0 | $0 | 2 | $10.6M |
| Mark McKechnie | See Remarks | 0 | $0 | 1 | $4.26M |
| Haiping Dun | Director | 0 | $0 | 1 | $406K |
Tracked funds that report ACMR
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Renaissance Technologies | 229,800 | $29.2M | ▲ +87.4% |
| Soros Fund Management | 30,122 | $3.82M | ▲ New |
Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →