Haiping Dun

Insider Reports History

Reporting-owner location: Fremont, CA
Latest reporting-owner signature: /s/ Mark McKechnie, Attorney-in-Fact for Haiping Dun
Source: Latest parsed Forms 3/4/5 signature
Transaction source note: Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Haiping Dun

Form 4 holding Director

ACM Research, Inc.

Security class: Class A Common Stock
Shares / value: 755,090
Estimated value: $95,813,370
Report date: 18 Aug 2026
Price: $126.89
Ownership: Haiping Dun & Chi-Pin H Dun Revocable Trust

Form 4 holding Director

ACM Research, Inc.

Security class: Class A Common Stock
Shares / value: 100,000
Estimated value: $12,689,000
Report date: 18 Aug 2026
Price: $126.89
Ownership: Dun Family GST Trust

Form 4 holding Director

ACM Research, Inc.

Security class: Class A Common Stock
Shares / value: 0
Estimated value: $0
Report date: 18 Aug 2026
Price: $82.17
Ownership: Direct

Form 4 holding Director

ACM Research, Inc.

Security class: Stock Option
Shares / value: 45,000
Estimated value
Report date: 18 Aug 2026
Price
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount

Form 4 holding Director

ACM Research, Inc.

Security class: Restricted Stock Units
Shares / value: 728
Estimated value
Report date: 12 Aug 2026
Price
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount

Insider Reports Filed by Haiping Dun

4 ACMR

ACM Research, Inc.

Report period: 18 Aug 2026
Transactions: 5
Transaction value: -$405,670
Accepted by SEC: 20 Aug 2026, 16:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 12 Aug 2026
Transactions: 2
Transaction value: $0
Accepted by SEC: 26 Aug 2026, 21:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 19 May 2026
Transactions: 6
Transaction value: -$331,111
Accepted by SEC: 21 May 2026, 16:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 09 Mar 2026
Transactions: 4
Transaction value: -$217,363
Accepted by SEC: 11 Mar 2026, 16:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 12 Nov 2025
Transactions: 1
Transaction value: $0
Accepted by SEC: 14 Nov 2025, 16:33
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 12 Aug 2025
Transactions: 1
Transaction value: $0
Accepted by SEC: 14 Aug 2025, 16:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 14 Mar 2025
Transactions: 2
Transaction value: -$275,976
Accepted by SEC: 18 Mar 2025, 21:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 10 Mar 2025
Transactions: 1
Transaction value: -$398,127
Accepted by SEC: 12 Mar 2025, 16:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 03 Mar 2025
Transactions: 3
Transaction value: -$2.58
Accepted by SEC: 05 Mar 2025, 16:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 29 Nov 2024
Transactions: 1
Transaction value: -$332,181
Accepted by SEC: 03 Dec 2024, 16:32
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 22 Nov 2024
Transactions: 1
Transaction value: -$286,800
Accepted by SEC: 26 Nov 2024, 16:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 14 Nov 2024
Transactions: 3
Transaction value: -$11.78
Accepted by SEC: 18 Nov 2024, 16:32
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 29 Aug 2024
Transactions: 1
Transaction value: -$345,274
Accepted by SEC: 03 Sep 2024, 16:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 22 Aug 2024
Transactions: 1
Transaction value: -$297,750
Accepted by SEC: 26 Aug 2024, 16:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 14 Aug 2024
Transactions: 3
Transaction value: -$0.14
Accepted by SEC: 16 Aug 2024, 21:02
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 12 Aug 2024
Transactions: 1
Transaction value: $0
Accepted by SEC: 20 Aug 2024, 21:00
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 27 Jun 2024
Transactions: 2
Transaction value: $0
Accepted by SEC: 01 Jul 2024, 16:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 29 May 2024
Transactions: 1
Transaction value: -$435,379
Accepted by SEC: 31 May 2024, 16:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 22 May 2024
Transactions: 1
Transaction value: -$343,200
Accepted by SEC: 24 May 2024, 16:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 14 May 2024
Transactions: 3
Transaction value: -$18.22
Accepted by SEC: 16 May 2024, 09:00
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 14 Mar 2024
Transactions: 2
Transaction value: -$538,376
Accepted by SEC: 15 Mar 2024, 21:32
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 08 Mar 2024
Transactions: 1
Transaction value: -$455,400
Accepted by SEC: 12 Mar 2024, 21:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 01 Mar 2024
Transactions: 3
Transaction value: -$0.72
Accepted by SEC: 05 Mar 2024, 21:31
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 29 Nov 2023
Transactions: 1
Transaction value: -$327,474
Accepted by SEC: 01 Dec 2023, 16:15
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 22 Nov 2023
Transactions: 1
Transaction value: -$264,900
Accepted by SEC: 27 Nov 2023, 16:24
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 14 Nov 2023
Transactions: 3
Transaction value: -$5.68
Accepted by SEC: 16 Nov 2023, 16:15
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 22 Aug 2023
Transactions: 1
Transaction value: -$444,557
Accepted by SEC: 24 Aug 2023, 20:13
Role: Director
Next action: Open filing details

4/A ACMR

ACM Research, Inc.

Report period: 10 Aug 2023
Transactions: 2
Transaction value: $0
Accepted by SEC: 21 Aug 2023, 21:19
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 01 Jun 2023
Transactions: 1
Transaction value: -$375,000
Accepted by SEC: 05 Jun 2023, 18:26
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 22 May 2023
Transactions: 3
Transaction value: -$9.44
Accepted by SEC: 24 May 2023, 18:33
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 16 Mar 2023
Transactions: 1
Transaction value: -$452,250
Accepted by SEC: 20 Mar 2023, 20:55
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 09 Mar 2023
Transactions: 3
Transaction value: -$4.88
Accepted by SEC: 13 Mar 2023, 21:02
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 30 Nov 2022
Transactions: 1
Transaction value: -$297,807
Accepted by SEC: 02 Dec 2022, 16:31
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 22 Nov 2022
Transactions: 3
Transaction value: -$2.99
Accepted by SEC: 25 Nov 2022, 16:30
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 14 Nov 2022
Transactions: 3
Transaction value: -$4.4
Accepted by SEC: 15 Nov 2022, 20:03
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 22 Aug 2022
Transactions: 1
Transaction value: -$588,246
Accepted by SEC: 24 Aug 2022, 21:01
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 15 Aug 2022
Transactions: 4
Transaction value: +$704,067
Accepted by SEC: 17 Aug 2022, 18:00
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 08 Aug 2022
Transactions: 3
Transaction value: -$16.53
Accepted by SEC: 10 Aug 2022, 17:00
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 30 Jun 2022
Transactions: 1
Transaction value: $0
Accepted by SEC: 05 Jul 2022, 17:31
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 27 May 2022
Transactions: 1
Transaction value: -$542,250
Accepted by SEC: 31 May 2022, 21:03
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 18 May 2022
Transactions: 3
Transaction value: -$1.5
Accepted by SEC: 20 May 2022, 21:50
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 09 Mar 2022
Transactions: 5
Transaction value: -$988,698
Accepted by SEC: 11 Mar 2022, 16:08
Role: Director
Next action: Open filing details

4 ACMR

ACM Research, Inc.

Report period: 02 Mar 2022
Transactions: 3
Transaction value: -$67.26
Accepted by SEC: 04 Mar 2022, 16:26
Role: Director
Next action: Open filing details

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