Haiping Dun
Haiping Dun: Director at ACM Research. What Haiping Dun holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.
ACM Research (ACMR)
Haiping Dun holds 855,090 ACM Research shares (1.2% of the company), worth about $65.0M at the last price, according to the Form 4 of Aug 18, 2026.
- Shares held: 855,090 (1.2%), $65.0M — Held through trusts (Dun Family GST Trust, Haiping Dun & Chi-Pin H Dun Revocable Trust): 855,090 Class A.
- Options: 45,000 (0.06%), $3.4M — The right to buy 45,000 shares at $5.60 each, until 2029. Not bought yet.
- Options: 20,000 (0.03%), $1.5M — The right to buy 20,000 shares at $18.89 each, until 2034. Not bought yet.
- Options: 20,000 (0.03%), $1.5M — The right to buy 20,000 shares at $24.93 each, until 2035. Not bought yet.
- Options: 6,400 (0.01%), $486,752.00 — The right to buy 6,400 shares at $81.26 each, until 2036. Not bought yet.
- Share units: 728 (0.00%), $55,368.04 — ACM Research promised them as pay: each unit becomes a share when it vests, if its conditions are met. No vote until then.
Declarations
- ACM Research (ACMR) — Form 4 of Aug 18, 2026: option exercise or conversion of 5,000 at $5.60; open-market sale of 1,200 at $80.29; 855,090 shares after 0001140361-26-033892
- ACM Research (ACMR) — Form 4 of Aug 12, 2026 0001140361-26-034526
- ACM Research (ACMR) — Form 4 of May 19, 2026: option exercise or conversion of 5,000 at $5.60; open-market sale of 1,333 at $63.84; 855,090 shares after 0001140361-26-022458
- ACM Research (ACMR) — Form 4 of Mar 9, 2026: option exercise or conversion of 5,000 at $5.60; open-market sale of 4,100 at $43.37; 855,090 shares after 0001140361-26-009039
- ACM Research (ACMR) — Form 4 of Nov 12, 2025: gift of 755,090; 755,090 shares after 0001140361-25-042348
- ACM Research (ACMR) — Form 4 of Aug 12, 2025 0001140361-25-031257
- ACM Research (ACMR) — Form 4 of Mar 14, 2025: open-market sale of 2,456 at $28.32; open-market sale of 7,062 at $29.23; 855,090 shares after 0001140361-25-009327
- ACM Research (ACMR) — Form 4 of Mar 10, 2025: open-market sale of 15,001 at $26.54; 864,608 shares after 0001140361-25-008444
- ACM Research (ACMR) — Form 4 of Mar 3, 2025: option exercise or conversion of 25,001 at $0.50; shares withheld for tax of 482 at $25.94; 879,609 shares after 0001140361-25-007211
- ACM Research (ACMR) — Form 4 of Nov 29, 2024: open-market sale of 19,058 at $17.43; 855,090 shares after 0001140361-24-048310
- ACM Research (ACMR) — Form 4 of Nov 22, 2024: open-market sale of 15,000 at $19.12; 874,148 shares after 0001140361-24-047888
- ACM Research (ACMR) — Form 4 of Nov 14, 2024: option exercise or conversion of 35,000 at $0.50; shares withheld for tax of 942 at $18.59; 889,148 shares after 0001140361-24-047169
- ACM Research (ACMR) — Form 4 of Aug 29, 2024: open-market sale of 19,097 at $18.08; 855,090 shares after 0001140361-24-039942
- ACM Research (ACMR) — Form 4 of Aug 22, 2024: open-market sale of 15,000 at $19.85; 874,187 shares after 0001140361-24-038571
- ACM Research (ACMR) — Form 4 of Aug 14, 2024: option exercise or conversion of 35,000 at $0.50; shares withheld for tax of 903 at $19.38; 889,187 shares after 0001140361-24-037711
Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.