Haiping Dun
CIK 1721581 · last filed 2026-05-21
Haiping Dun is a corporate insider who has filed 47 SEC Form 4 insider transactions across 1 company since 2019. The most recent filing, for ACMR, was dated May 21, 2026. Across all open-market trades the lifetime net is −$7.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $9.7M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$9.74M
1
47
-$7.85M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ACMR | Director | 103,667 | $93.95 | $9.74M | -$7.85M | 47 | 2026-05-21 |
Recent Filings
47 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-21 | ACMR | Mixed | — | -$303.1K | EDGAR |
| 2026-03-11 | ACMR | Mixed | — | -$189.4K | EDGAR |
| 2025-11-14 | ACMR | Gift (G) | −755,090 | $0 | EDGAR |
| 2025-08-14 | ACMR | Grant (A) | — | $0 | EDGAR |
| 2025-03-18 | ACMR | Sell (S) | −9,518 | -$276.0K | EDGAR |
| 2025-03-12 | ACMR | Sell (S) | −15,001 | -$398.1K | EDGAR |
| 2025-03-05 | ACMR | Mixed | +24,519 | -$3 | EDGAR |
| 2024-12-03 | ACMR | Sell (S) | −19,058 | -$332.2K | EDGAR |
| 2024-11-26 | ACMR | Sell (S) | −15,000 | -$286.8K | EDGAR |
| 2024-11-18 | ACMR | Mixed | +34,058 | -$12 | EDGAR |