ACMR
ACM Research, Inc. · Manufacturing · Market cap $3.9B
Insiders sold $15.3M net in the last 90 days ·3 sellers, 0 buyers· 4 of 4 sales under Rule 10b5-1 plans· latest Form 4 filed Sep 10, 2026
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$51.2M
reported sales (SEC code S)
Unique Insiders
8
in the rolling window
Latest filing
Sep 10, 2026
Wang David H
ACM Research, Inc. (ACMR) has 18 SEC Form 4 filings (102 transaction rows) in the rolling window, disclosed by 8 distinct insiders. Most recent filing: Sep 10, 2026.
Inside the rolling window, 8 insiders at ACM Research, Inc. reported no open-market purchases and 27 open-market sales totaling $51.2M. The most active filer is See Remarks Wang David H with 8 filings. Insiders have net sold $26.3M over the trailing 6 months. The most recent open-market filing is a sale of 70,000 shares by See Remarks Wang David H, dated Sep 8, 2026, worth $5.4M.
- Industry:Semiconductors
- CEO:David H. Wang
- Employees:2,513
- HQ:Fremont, CA, US
- IPO:2017-11-02
| Source | |||||||
|---|---|---|---|---|---|---|---|
Wang David HFirst in 3 months | See Remarks | Sale | 70,000 | $5.4M | Sep 10 | -24.1% | SEC ↗ |
Wang David HFirst in 3 months | See Remarks | Sale | 70,000 | $5.2M | Sep 10 | -24.1% | SEC ↗ |
McKechnie MarkFirst in 5 months | See Remarks | Sale | 55,199 | $4.3M | Aug 22 | -28.9% | SEC ↗ |
Dun HaipingFirst in 3 months | Director | Sale | 5,000 | $406K | Aug 20 | — | SEC ↗ |
Cheav SothearaFirst filing | See remarks | Sale | 13,351 | $1.1M | Jun 6 | — | SEC ↗ |
Cheav SothearaFirst filing | See remarks | Sale | 5,399 | $449K | Jun 6 | — | SEC ↗ |
| See Remarks | Sale | 60,000 | $5.4M | Jun 5 | — | SEC ↗ | |
| See Remarks | Sale | 40,002 | $3.4M | Jun 5 | — | SEC ↗ | |
| Director | Sale | 5,000 | $331K | May 21 | — | SEC ↗ | |
| Director | Sale | 5,000 | $260K | Apr 21 | — | SEC ↗ | |
Wang David HFirst in 3 months | See Remarks | Sale | 60,000 | $2.9M | Mar 13 | — | SEC ↗ |
Wang David HFirst in 3 months | See Remarks | Sale | 50,000 | $2.3M | Mar 13 | — | SEC ↗ |
McKechnie MarkFirst in 3 months | See Remarks | Sale | 98,551 | $4.5M | Mar 13 | — | SEC ↗ |
Liu TracyFirst filing | Director | Sale | 45,000 | $2.1M | Mar 12 | — | SEC ↗ |
Liu TracyFirst filing | Director | Sale | 15,000 | $719K | Mar 12 | — | SEC ↗ |
Dun HaipingFirst filing | Director | Sale | 5,000 | $217K | Mar 11 | — | SEC ↗ |
Feng LisaFirst in 4 months | See remarks | Sale | 15,000 | $750K | Mar 9 | — | SEC ↗ |
Feng LisaFirst in 4 months | See remarks | Sale | 15,000 | $691K | Mar 9 | — | SEC ↗ |
Pappis Charles CFirst filing | Director | Sale | 5,000 | $250K | Mar 9 | — | SEC ↗ |
McKechnie MarkFirst filing | See Remarks | Sale | 8,750 | $294K | Dec 8 | — | SEC ↗ |
McKechnie MarkFirst filing | See Remarks | Sale | 22,500 | $798K | Dec 8 | — | SEC ↗ |
Wang David HFirst filing | See Remarks | Sale | 70,000 | $2.3M | Dec 5 | — | SEC ↗ |
Wang David HFirst filing | See Remarks | Sale | 60,000 | $2.0M | Dec 5 | — | SEC ↗ |
Chen FupingFirst filing | See remarks | Sale | 100,000 | $3.3M | Dec 4 | — | SEC ↗ |
Chen FupingFirst filing | See remarks | Sale | 20,000 | $661K | Dec 4 | — | SEC ↗ |
Frequently asked questions
How many SEC Form 4 insider filings does ACMR have?
ACM Research, Inc. (ACMR) has 18 SEC Form 4 filings (102 transaction rows) in the rolling 365-day window, disclosed by 8 distinct insiders. Most recent filing: Sep 10, 2026.
When was the most recent SEC Form 4 filing for ACMR?
The most recent Form 4 filing for ACMR on Tracefour is dated Sep 10, 2026.
Who is the most active insider at ACMR?
The most active SEC Form 4 filer at ACMR in the rolling window is See Remarks Wang David H, with 8 filings.
What is the net insider flow at ACMR over the last 6 months?
Over the trailing 180 days, insiders at ACMR have net sold $26.3M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at ACMR in the current window?
Inside the rolling window, insiders at ACMR bought $0 and sold $51.2M based on SEC Form 4 filings.
Can I get alerts for ACMR insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at ACM Research, Inc. (ACMR). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
ACM Research, Inc. is in the Manufacturing sector.