Insiders / Dun Haiping
Dun Haiping
CIK 1721581personinsider
Companies
1
First seen
Mar 11, 2026
Last activity
Mar 11, 2026
Companies
| Company | Shares held | Latest |
|---|---|---|
| ACM Research Inc · ACMR | 0 | — |
All securities held
1 position · latest reported per filing
| Company | Security | Shares |
|---|---|---|
| ACM Research Inc | Stock OptionDerivative | 55,000 |
Activity
InsidersInstitutions
This person's insider trades (Form 4), across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Mar 9, 2026 | Sell | ACMR ACM Research Inc Class A Common Stock | $177.8K | -4K -82.00% | 900 <0.01% of shares | medium |
| Mar 9, 2026 | Sell | ACMR ACM Research Inc Class A Common Stock | $39.5K | -900 -100.00% | 0 0.00% of shares | low |
| Mar 9, 2026 | Exercise | ACMR ACM Research Inc Class A Common Stock | $28.0K | +5K | 5,000 <0.01% of shares | low |
| Mar 9, 2026 | Exercise | ACMR ACM Research Inc Stock Option | — | -5K -8.33% | 55,000 0.08% of shares | low |