Haiping Dun
CIK 1721581 · last filed 2026-05-21
"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.
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Disclosed Exposure
$9.74M
Companies
1
Total Filings
47
Lifetime Open-Market Net
-$7.85M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| 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 · Page 4 of 5
47 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2023-03-13 | ACMR | Mixed | +35,996 | -$5 | EDGAR |
| 2022-12-02 | ACMR | Sell (S) | −35,327 | -$297.8K | EDGAR |
| 2022-11-25 | ACMR | Mixed | +35,327 | -$3 | EDGAR |
| 2022-11-15 | ACMR | Mixed | +35,530 | -$4 | EDGAR |
| 2022-08-24 | ACMR | Sell (S) | −36,537 | -$588.2K | EDGAR |
| 2022-08-17 | ACMR | Mixed | +73,056 | $704.1K | EDGAR |
| 2022-08-10 | ACMR | Mixed | +36,519 | -$17 | EDGAR |
| 2022-07-05 | ACMR | Grant (A) | — | $0 | EDGAR |
| 2022-05-31 | ACMR | Sell (S) | −36,150 | -$542.2K | EDGAR |
| 2022-05-20 | ACMR | Mixed | +36,150 | -$2 | EDGAR |
Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.