Insider Profile · SEC Form 4 Activity · Trailing 90 Days
Dun Haiping
Over the trailing 90 days, Dun Haiping (Other at ACM Research, Inc.) traded $359K of stock (net selling $303K) in ACMR, per 6 SEC Form 4 transactions.
- Role
- Other
- Companies
- ACMR
- Window
- Trailing 90 days · 6 transactions · CIK 1721581
- Net activity
- −$303K ($28K bought · $331K sold)
By Company (Trailing 90 Days)
| Symbol | Company | Txns | Bought | Sold | Net |
|---|---|---|---|---|---|
| ACMR | ACM Research, Inc. | 6 | $28K | $331K | −$303K |
Transactions (6)
| Date | Symbol | Type | Shares | Value | Description |
|---|---|---|---|---|---|
| 2026-05-19 | ACMR | Sell | 1.3K | $85K | Open market or private sale |
| 2026-05-19 | ACMR | Sell | 5.0K | $0 | Exercise or conversion of derivative security |
| 2026-05-19 | ACMR | Sell | 1.3K | $88K | Open market or private sale |
| 2026-05-19 | ACMR | Sell | 1.9K | $125K | Open market or private sale |
| 2026-05-19 | ACMR | Sell | 500 | $33K | Open market or private sale |
| 2026-05-19 | ACMR | Buy | 5.0K | $28K | Exercise or conversion of derivative security |
Activity shown covers the trailing 90 days of SEC Form 4 filings. "Buy" and "sell" follow the SEC acquired/disposed codes and include compensation events (grants, option exercises, tax withholding) unless noted. Historical fact, not investment advice.
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