ACM Research, Inc. (ACMR) Insider Trading & SEC Filings
Last SEC filing
ACM Research, Inc. (ACMR) has filed 4 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-07. Insider sales over the same period: 22 transactions worth $10.75M. 7 Form 8-K material event filings were reported by ACMR in the last 90 days. 5 Form 144 notices of proposed sale were filed for ACMR stock. InsiderAlpha tracks every ACMR SEC filing - Form 4, Form 144, and 8-K - in real time, including Rule 10b5-1 plan detection.
About ACM Research, Inc. (ACMR)
ACM Research, Inc. trades under the ticker ACMR. InsiderAlpha tracks 41 primary SEC Form 4 filings from 11 reporting insiders for ACMR since 2024, sourced directly from SEC EDGAR.
| Sector | Industrials insider trading |
|---|---|
| SIC classification | Special Industry Machinery, NEC (SIC 3559) |
| SEC CIK | 0001680062 |
90-Day SEC Filing Activity
| Insider sales (90d) | 22 ($10.75M) |
|---|---|
| Form 4 filings (90d) | 4 |
| Form 8-K filings (90d) | 7 |
| Form 144 notices (90d) | 5 |
| Latest Form 4 filing | 2026-07-07 |
Recent ACMR Insider Transactions (Form 4)
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Sotheara Cheav | Insider | S - Open-market sale [10b5-1] | 968 | $82.61 | $80K | SEC | |
| Sotheara Cheav | Insider | M - Option exercise [10b5-1] | 5.4K | $13.89 | $75K | SEC | |
| Sotheara Cheav | Insider | S - Open-market sale [10b5-1] | 2.4K | $81.73 | $195K | SEC | |
| Sotheara Cheav | Insider | S - Open-market sale [10b5-1] | 400 | $84.01 | $34K | SEC | |
| Sotheara Cheav | Insider | S - Open-market sale [10b5-1] | 1.6K | $85.41 | $141K | SEC | |
| David H. Wang | Chief Executive Officer, President and Director | S - Open-market sale [10b5-1] | 826 | $87.91 | $73K | SEC | |
| David H. Wang | Chief Executive Officer, President and Director | S - Open-market sale [10b5-1] | 8.6K | $87.13 | $748K | SEC | |
| Sotheara Cheav | Insider | M - Option exercise [10b5-1] | 13.4K | $13.89 | $185K | SEC | |
| Sotheara Cheav | Insider | S - Open-market sale [10b5-1] | 9.2K | $85.11 | $784K | SEC | |
| Sotheara Cheav | Insider | S - Open-market sale [10b5-1] | 1.3K | $84.08 | $109K | SEC | |
| Sotheara Cheav | Insider | S - Open-market sale [10b5-1] | 2.8K | $85.77 | $244K | SEC | |
| David H. Wang | Chief Executive Officer, President and Director | S - Open-market sale [10b5-1] | 2.1K | $83.86 | $173K | SEC | |
| David H. Wang | Chief Executive Officer, President and Director | M - Option exercise [10b5-1] | 40.0K | $1.00 | $40K | SEC | |
| David H. Wang | Chief Executive Officer, President and Director | S - Open-market sale [10b5-1] | 17.5K | $85.11 | $1.49M | SEC | |
| David H. Wang | Chief Executive Officer, President and Director | S - Open-market sale [10b5-1] | 11.0K | $86.07 | $946K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for ACM Research, Inc. (ACMR). Updated in real time as new filings are submitted to the SEC.
Most-Active ACMR Insiders - Last 90 Days
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| David H. Wang | 16 | $8.94M |
| Sotheara Cheav | 11 | $1.85M |
| Haiping Dun | 6 | $359K |
Recent ACMR Form 8-K Material Events
- - Item 8.01, 9.01 [SEC]
- - Item 5.07 [SEC]
- - Item 8.01, 9.01 [SEC]
- - Item 8.01, 9.01 [SEC]
- - Item 8.01 [SEC]
Recent ACMR Form 144 Notices of Proposed Sale
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
Recent Insider Filings
- - David H. Wang (Chief Executive Officer, President and Director)
- - Sotheara Cheav (Insider)
- - David H. Wang (Chief Executive Officer, President and Director)
- - Haiping Dun (Insider)
- - Charles C. Pappis (Insider)
Form 4 Transaction Code Reference
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ACMR insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
ACMR Insider Trading - FAQ
- What is the latest insider trade for ACMR?
- ACM Research, Inc. (ACMR) had 4 insider filings in the last 90 days, with the most recent on 2026-07-07. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
- How many insiders are buying ACMR stock?
- 0 insider purchases of ACMR were filed in the last 90 days.
- How many insiders are selling ACMR stock?
- 22 insider sales of ACMR were filed in the last 90 days, totaling $10.75M.
- Where can I see ACMR SEC filings (Form 4, 10-K, 10-Q, 8-K)?
- This page tracks ACMR Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Industrials Companies with Insider Activity
Other companies in the InsiderAlpha index with a significant SEC Form 4 insider-trading footprint:
- $ADMQ ADM ENDEAVORS, INC.
- $ARAI Arrive AI Inc.
- $BRQL brooqLy, Inc.
- $CCO Clear Channel Outdoor Holdings, Inc.
- $CGEH Capstone Green Energy Holdings, Inc.
- $DFNS Nukkleus Inc.
- $DRCT Direct Digital Holdings, Inc.
- $FLY Firefly Aerospace Inc.
- $GOLD Gold.com, Inc.
- $GRBK Green Brick Partners, Inc.
Related Companies - Recent Insider Activity
- AXCELIS TECHNOLOGIES INC (ACLS)
- VEECO INSTRUMENTS INC (VECO)
- Cricut, Inc. (CRCT)
- Velo3D, Inc. (VELO)
- Energy Recovery, Inc. (ERII)
- TRIO-TECH INTERNATIONAL (TRT)
- LAM RESEARCH CORP (LRCX)
- SONO TEK CORP (SOTK)
- Azenta, Inc. (AZTA)
- AMTECH SYSTEMS INC (ASYS)
Learn More
- What is SEC Form 4?
- How to read insider buying signals
- Rule 10b5-1 trading plans explained
- The cluster buying signal
Open the live ACMR dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.