ACM Research (ACMR) insider trading
8 directors and officers declare holding shares of ACM Research (ACMR), each in their own filing with the SEC. The largest is David H. Wang (See Remarks · Director · 10% owner) with 1.7M shares, 2.4% of the company, worth $121.7M at the last close. The most recent move on file: David H. Wang sold 140,000 shares at $75.99 on Sep 8, 2026. Of the 7 with a trade on file, 0 last bought and 7 last sold. Purchases and sales are as reported on Forms 3, 4 and 5 — the SEC counts private transactions too, and many large sales follow a plan arranged in advance. Holdings are never added up: two spouses often report the same shares, and a joint filing carries a fund's.
| Insider | Role | Shares | % of company | Value | Last trade on file | Filed |
|---|---|---|---|---|---|---|
| David H. Wang | See Remarks · Director · 10% owner | 1.7M | 2.4% | $121.7M | sold 140,000 shares at $75.99 on Sep 8, 2026 | Sep 9, 2026 |
| Haiping Dun | Director | 855,090 | 1.2% | $61.1M | sold 5,000 shares at $80.29 on Aug 18, 2026 | Aug 18, 2026 |
| Jian Wang | See remarks | 253,158 | 0.36% | $18.1M | sold 30,000 shares at $35.00 on Sep 18, 2025 | Sep 18, 2025 |
| Tracy Liu | Director | 110,772 | 0.16% | $7.9M | — | Mar 11, 2026 |
| Sotheara Cheav | See remarks | 100,002 | 0.14% | $7.1M | sold 18,750 shares at $84.08 on Jun 4, 2026 | Jun 5, 2026 |
| Lisa Feng | See remarks | 50,001 | 0.07% | $3.6M | sold 30,000 shares at $49.81 on Mar 5, 2026 | Mar 6, 2026 |
| Mark McKechnie | See Remarks | 900 | <0.01% | $64,332.00 | sold 55,199 shares at $76.34 on Aug 20, 2026 | Aug 20, 2026 |
| Fuping Chen | See remarks | 0 | 0.00% | $0.00 | sold 120,000 shares at $33.20 on Dec 2, 2025 | Dec 3, 2025 |
Each insider at ACM Research
- David H. Wang — See Remarks · Director · 10% owner
- Haiping Dun — Director
- Jian Wang — See remarks
- Tracy Liu — Director
- Sotheara Cheav — See remarks
- Lisa Feng — See remarks
- Mark McKechnie — See Remarks
- Fuping Chen — See remarks
No longer filing
- Chenming Hu — Director
- Xiao Xing — Director
What insiders bought and sold across AI stocks · All filings on sec.gov