Wang David H — SEC Form 4 filings
SEC reporting owner CIK 1721580. 22 Form 4 filings on record with FilingPulse; latest filed 2026-09-10.
Transaction summary — filings shown
Covers all 22 filings on record, filed 2024-03-05 to 2026-09-10. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 51 legs across 14 filings — 1,393,181 shares, $51,195,018 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 41.
- Largest priced transaction: sale of 51,374 shares @ $77.15 ($3,963,504) in ACM Research, Inc., filed 2026-09-10.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| ACM Research, Inc. (ACMR) | See Remarks, Director, 10% owner | 22 | — | 51 legs · 1,393,181 sh · $51,195,018 | 41 |
Form 4 filings — Wang David H
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-10 | 4 | ACM Research, Inc. (ACMR) | Option exercise (M): 70,000 @ $1 · Sale (S): 4,803 @ $75.99 · Sale (S): 51,374 @ $77.15 · Sale (S): 12,323 @ $78.08 · Sale (S): 1,500 @ $78.57 · Option exercise (M): 70,000 @ $1 · +7 more | EDGAR |
| 2026-07-06 | 4 | ACM Research, Inc. (ACMR) | Grant/award (A): 6,208 (derivative) @ $0 | EDGAR |
| 2026-06-05 | 4 | ACM Research, Inc. (ACMR) | Option exercise (M): 60,000 @ $1 · Sale (S): 4,300 @ $87.57 · Sale (S): 6,295 @ $88.98 · Sale (S): 32,450 @ $89.84 · Sale (S): 9,925 @ $90.78 · Sale (S): 5,843 @ $92.38 · +9 more | EDGAR |
| 2026-03-13 | 4 | ACM Research, Inc. (ACMR) | Option exercise (M): 60,000 @ $1 · Sale (S): 55,373 @ $47.89 · Sale (S): 4,627 @ $48.34 · Option exercise (M): 50,000 @ $1 · Sale (S): 10,561 @ $44.92 · Sale (S): 38,737 @ $45.74 · +3 more | EDGAR |
| 2026-02-06 | 4 | ACM Research, Inc. (ACMR) | Grant/award (A): 545,400 (derivative) @ $0 | EDGAR |
| 2025-12-05 | 4 | ACM Research, Inc. (ACMR) | Option exercise (M): 70,000 @ $1 · Sale (S): 68,800 @ $33.05 · Sale (S): 1,200 @ $33.56 · Option exercise (M): 60,000 @ $1 · Sale (S): 19,817 @ $33.52 · Sale (S): 40,183 @ $34.42 · +2 more | EDGAR |
| 2025-10-29 | 4 | ACM Research, Inc. (ACMR) | Grant/award (A): 545,400 (derivative) @ $0 | EDGAR |
| 2025-09-30 | 4 | ACM Research, Inc. (ACMR) | Option exercise (M): 130,000 @ $1 · Option exercise (M): 130,000 (derivative) @ $0 | EDGAR |
| 2025-09-05 | 4 | ACM Research, Inc. (ACMR) | Option exercise (M): 70,000 @ $1 · Sale (S): 66,057 @ $26.73 · Sale (S): 3,943 @ $27.31 · Option exercise (M): 60,000 @ $1 · Sale (S): 60,000 @ $26.44 · Option exercise (M): 70,000 (derivative) @ $0 · +1 more | EDGAR |
| 2025-05-23 | 4 | ACM Research, Inc. (ACMR) | Option exercise (M): 70,000 @ $1 · Sale (S): 69,992 @ $23.60 · Sale (S): 8 @ $24.04 · Option exercise (M): 60,000 @ $1 · Sale (S): 60,000 @ $22.63 · Option exercise (M): 70,000 (derivative) @ $0 · +1 more | EDGAR |
| 2025-03-13 | 4 | ACM Research, Inc. (ACMR) | Sale (S): 56,250 @ $26.57 · Sale (S): 37,500 @ $27.42 · Sale (S): 36,481 @ $27.29 · Sale (S): 1,019 @ $27.65 | EDGAR |
| 2025-03-05 | 4 | ACM Research, Inc. (ACMR) | Option exercise (M): 210,000 @ $0.50 · Tax withholding (F): 4,048 @ $25.94 · Option exercise (M): 210,000 (derivative) @ $0 | EDGAR |
| 2024-12-03 | 4 | ACM Research, Inc. (ACMR) | Sale (S): 56,250 @ $17.44 | EDGAR |
| 2024-11-29 | 4 | ACM Research, Inc. (ACMR) | Sale (S): 46,766 @ $17.80 · Sale (S): 9,484 @ $18.31 | EDGAR |
| 2024-11-26 | 4 | ACM Research, Inc. (ACMR) | Sale (S): 56,250 @ $19.08 | EDGAR |
| 2024-11-18 | 4 | ACM Research, Inc. (ACMR) | Option exercise (M): 270,000 @ $0.50 · Tax withholding (F): 7,262 @ $18.59 · Option exercise (M): 270,000 (derivative) @ $0 | EDGAR |
| 2024-05-31 | 4 | ACM Research, Inc. (ACMR) | Sale (S): 45,000 @ $22.62 · Sale (S): 41,090 @ $22.62 | EDGAR |
| 2024-05-24 | 4 | ACM Research, Inc. (ACMR) | Sale (S): 45,000 @ $22.81 · Sale (S): 45,000 @ $22.81 | EDGAR |
| 2024-05-16 | 4 | ACM Research, Inc. (ACMR) | Option exercise (M): 180,000 @ $0.50 · Tax withholding (F): 3,910 @ $23.02 · Option exercise (M): 180,000 (derivative) @ $0 | EDGAR |
| 2024-03-15 | 4 | ACM Research, Inc. (ACMR) | Sale (S): 76,478 @ $27.51 · Sale (S): 10,611 @ $28.38 | EDGAR |
| 2024-03-12 | 4 | ACM Research, Inc. (ACMR) | Sale (S): 45,000 @ $30.36 · Sale (S): 45,000 @ $30.35 | EDGAR |
| 2024-03-05 | 4 | ACM Research, Inc. (ACMR) | Option exercise (M): 180,000 @ $0.50 · Tax withholding (F): 2,911 @ $30.92 · Option exercise (M): 180,000 (derivative) @ $0 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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