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Insider · CIK 0001721580

Wang David H

CIK 0001721580 Name as filed on the most recent filing

Filed as Wang David H (19)

56 transaction lines · from 19 filings · filed 2020-09-04 to 2026-06-05 The span is the filing dates this catalog holds, not the entity's full filing history. Absence here is not evidence of absence at the SEC.

How this page attributes a trade

A line appears here when the filing that carries it names this CIK as a reporting owner, not only when the parser picked this CIK as the line's primary owner. That is why a joint filing appears on both owners' pages rather than vanishing from the second one. The catalog never merges two CIKs into one person and never splits one CIK into two: identity here is the SEC's own identifier and nothing else.

01

Issuers this insider has filed against

Ordered by last-seen filing date, newest first. Roles are as filed on the Form 4 and are not normalised.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-21 05:23 UTC.

No issuer is recorded

The catalog holds no filing linking this CIK to an issuer.

02

Transactions

Every stored Form 4 line naming this reporting owner, newest transaction date first. Each row links to the filing it came from.

56 transactions · Newest transaction date first, id breaking the tie.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-21 05:23 UTC.

Transactions filed by this insider
Direction Date Issuer Code Shares Price Value USD Filing
2026-06-04 ACM Research, Inc.
ACMR 		S, Open-market sale 17,543 disposed 85.11 1,493,084.73 Form 4, filing 0001140361-26-024280
2026-06-04 ACM Research, Inc.
ACMR 		S, Open-market sale 10,992 disposed 86.07 946,081.44 Form 4, filing 0001140361-26-024280
2026-06-04 ACM Research, Inc.
ACMR 		S, Open-market sale 8,581 disposed 87.13 747,662.53 Form 4, filing 0001140361-26-024280
2026-06-04 ACM Research, Inc.
ACMR 		S, Open-market sale 2,060 disposed 83.86 172,751.60 Form 4, filing 0001140361-26-024280
2026-06-04 ACM Research, Inc.
ACMR 		S, Open-market sale 826 disposed 87.91 72,613.66 Form 4, filing 0001140361-26-024280
2026-06-03 ACM Research, Inc.
ACMR 		S, Open-market sale 32,450 disposed 89.84 2,915,308.00 Form 4, filing 0001140361-26-024280
2026-06-03 ACM Research, Inc.
ACMR 		S, Open-market sale 9,925 disposed 90.78 900,991.50 Form 4, filing 0001140361-26-024280
2026-06-03 ACM Research, Inc.
ACMR 		S, Open-market sale 6,295 disposed 88.98 560,129.10 Form 4, filing 0001140361-26-024280
2026-06-03 ACM Research, Inc.
ACMR 		S, Open-market sale 5,843 disposed 92.38 539,776.34 Form 4, filing 0001140361-26-024280
2026-06-03 ACM Research, Inc.
ACMR 		S, Open-market sale 4,300 disposed 87.57 376,551.00 Form 4, filing 0001140361-26-024280
2026-06-03 ACM Research, Inc.
ACMR 		S, Open-market sale 1,187 disposed 93.04 110,438.48 Form 4, filing 0001140361-26-024280
2026-03-12 ACM Research, Inc.
ACMR 		S, Open-market sale 38,737 disposed 45.74 1,771,830.38 Form 4, filing 0001140361-26-009401
2026-03-12 ACM Research, Inc.
ACMR 		S, Open-market sale 10,561 disposed 44.92 474,400.12 Form 4, filing 0001140361-26-009401
2026-03-12 ACM Research, Inc.
ACMR 		S, Open-market sale 702 disposed 46.57 32,692.14 Form 4, filing 0001140361-26-009401
2026-03-11 ACM Research, Inc.
ACMR 		S, Open-market sale 55,373 disposed 47.89 2,651,812.97 Form 4, filing 0001140361-26-009401
2026-03-11 ACM Research, Inc.
ACMR 		S, Open-market sale 4,627 disposed 48.34 223,669.18 Form 4, filing 0001140361-26-009401
2025-12-04 ACM Research, Inc.
ACMR 		S, Open-market sale 40,183 disposed 34.42 1,383,098.86 Form 4, filing 0001140361-25-044559
2025-12-04 ACM Research, Inc.
ACMR 		S, Open-market sale 19,817 disposed 33.52 664,265.84 Form 4, filing 0001140361-25-044559
2025-12-03 ACM Research, Inc.
ACMR 		S, Open-market sale 68,800 disposed 33.05 2,273,840.00 Form 4, filing 0001140361-25-044559
2025-12-03 ACM Research, Inc.
ACMR 		S, Open-market sale 1,200 disposed 33.56 40,272.00 Form 4, filing 0001140361-25-044559
2025-09-04 ACM Research, Inc.
ACMR 		S, Open-market sale 60,000 disposed 26.44 1,586,400.00 Form 4, filing 0001140361-25-034208
2025-09-03 ACM Research, Inc.
ACMR 		S, Open-market sale 66,057 disposed 26.73 1,765,703.61 Form 4, filing 0001140361-25-034208
2025-09-03 ACM Research, Inc.
ACMR 		S, Open-market sale 3,943 disposed 27.31 107,683.33 Form 4, filing 0001140361-25-034208
2025-05-22 ACM Research, Inc.
ACMR 		S, Open-market sale 60,000 disposed 22.63 1,357,800.00 Form 4, filing 0001140361-25-020348
2025-05-21 ACM Research, Inc.
ACMR 		S, Open-market sale 69,992 disposed 23.60 1,651,811.20 Form 4, filing 0001140361-25-020348
2025-05-21 ACM Research, Inc.
ACMR 		S, Open-market sale 8 disposed 24.04 192.32 Form 4, filing 0001140361-25-020348
2025-03-13 ACM Research, Inc.
ACMR 		S, Open-market sale 36,481 disposed 27.29 995,566.49 Form 4, filing 0001140361-25-008688
2025-03-13 ACM Research, Inc.
ACMR 		S, Open-market sale 1,019 disposed 27.65 28,175.35 Form 4, filing 0001140361-25-008688
2025-03-12 ACM Research, Inc.
ACMR 		S, Open-market sale 37,500 disposed 27.42 1,028,250.00 Form 4, filing 0001140361-25-008688
2025-03-11 ACM Research, Inc.
ACMR 		S, Open-market sale 56,250 disposed 26.57 1,494,562.50 Form 4, filing 0001140361-25-008688
2024-11-29 ACM Research, Inc.
ACMR 		S, Open-market sale 56,250 disposed 17.44 981,000.00 Form 4, filing 0001140361-24-048306
2024-11-26 ACM Research, Inc.
ACMR 		S, Open-market sale 46,766 disposed 17.80 832,434.80 Form 4, filing 0001140361-24-048076
2024-11-26 ACM Research, Inc.
ACMR 		S, Open-market sale 9,484 disposed 18.31 173,652.04 Form 4, filing 0001140361-24-048076
2024-11-22 ACM Research, Inc.
ACMR 		S, Open-market sale 56,250 disposed 19.08 1,073,250.00 Form 4, filing 0001140361-24-047887
2024-05-29 ACM Research, Inc.
ACMR 		S, Open-market sale 45,000 disposed 22.62 1,017,900.00 Form 4, filing 0001140361-24-028376
2024-05-29 ACM Research, Inc.
ACMR 		S, Open-market sale 41,090 disposed 22.62 929,455.80 Form 4, filing 0001140361-24-028376
2024-05-22 ACM Research, Inc.
ACMR 		S, Open-market sale 45,000 disposed 22.81 1,026,450.00 Form 4, filing 0001140361-24-027456
2024-05-22 ACM Research, Inc.
ACMR 		S, Open-market sale 45,000 disposed 22.81 1,026,450.00 Form 4, filing 0001140361-24-027456
2024-03-14 ACM Research, Inc.
ACMR 		S, Open-market sale 76,478 disposed 27.51 2,103,909.78 Form 4, filing 0001140361-24-013647
2024-03-14 ACM Research, Inc.
ACMR 		S, Open-market sale 10,611 disposed 28.38 301,140.18 Form 4, filing 0001140361-24-013647
2024-03-08 ACM Research, Inc.
ACMR 		S, Open-market sale 45,000 disposed 30.36 1,366,200.00 Form 4, filing 0001140361-24-012895
2024-03-08 ACM Research, Inc.
ACMR 		S, Open-market sale 45,000 disposed 30.35 1,365,750.00 Form 4, filing 0001140361-24-012895
2023-11-29 ACM Research, Inc.
ACMR 		S, Open-market sale 45,000 disposed 17.14 771,300.00 Form 4, filing 0001140361-23-055757
2023-11-29 ACM Research, Inc.
ACMR 		S, Open-market sale 39,776 disposed 17.13 681,362.88 Form 4, filing 0001140361-23-055757
2023-11-22 ACM Research, Inc.
ACMR 		S, Open-market sale 45,000 disposed 17.68 795,600.00 Form 4, filing 0001140361-23-054706
2023-11-22 ACM Research, Inc.
ACMR 		S, Open-market sale 45,000 disposed 17.67 795,150.00 Form 4, filing 0001140361-23-054706
2023-09-13 ACM Research, Inc.
ACMR 		S, Open-market sale 85,116 disposed 17.68 1,504,850.88 Form 4, filing 0001140361-23-043978
2023-09-12 ACM Research, Inc.
ACMR 		S, Open-market sale 86,427 disposed 18.03 1,558,278.81 Form 4, filing 0001140361-23-043978
2023-09-12 ACM Research, Inc.
ACMR 		S, Open-market sale 3,573 disposed 18.72 66,886.56 Form 4, filing 0001140361-23-043978
2021-03-19 ACM Research, Inc.
ACMR 		S, Open-market sale 49,228 disposed 90.55 4,457,595.40 Form 4, filing 0001140361-21-009502

This column is intentionally blank

No transaction line is stored for this reporting owner, though the catalog holds filings naming them. That happens when the filings report only holdings or only positions the store does not carry, and when a parse failed; each filing page states its own parse status.

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Codes on this page
S, Open-market sale
Open-market sale

Every value is as reported on the Form 4. A price the filing did not report is marked Not reported and no value is computed from it. Codes outside the open market, drawn in grey behind a dashed rule, are compensation and administrative machinery rather than a decision to trade at the prevailing price.

What this insider's stored lines contain

Exact counts over every stored line for this entity. This is a statement of composition, not a filter: the only filter this page offers is the open-market one above, because that is the only one an index serves today.

  • Open-market purchase 0
  • Open-market sale 56
  • Option exercise 0
  • Grant or award 0
  • Tax withholding 0
  • Disposition to the issuer 0
  • In-the-money option exercise 0

How to cite this page

ebomi catalog. Wang David H, insider transactions. Retrieved 2026-08-21 from https://ebomi.com/insider/0001721580

Balogh, A. Insider trading. Scientific Data 10, 237 (2023) doi:10.1038/s41597-023-02147-6

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