David H. Wang - 13 May 2026 Form 4 Insider Report for ACM Research, Inc. (ACMR)

Reporting relationship: Chief Executive Officer, President and Director, Director, 10%+ Owner
Issuer ticker: ACMR
Reported as of: 13 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 06 Jul 2026, 21:00:15 UTC
Prior SEC filing: 13 Mar 2026
Next SEC filing: 05 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Mark McKechnie, Attorney-in-Fact for David H. Wang

Key filing fact

David H. Wang filed Form 4 for ACM Research, Inc. (ACMR) on 06 Jul 2026.

Key facts

This page summarizes David H. Wang's Form 4 filing for ACM Research, Inc. (ACMR).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 06 Jul 2026, 21:00.

Change

Previous filing in this sequence was filed on 13 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001721580 Primary reporting owner

Wang David H

Relationship: Chief Executive Officer, President and Director, Director, 10%+ Owner
Address: C/O ACM RESEARCH, INC., 42307 OSGOOD ROAD, SUITE I, FREMONT
Signature: /s/ Mark McKechnie, Attorney-in-Fact for David H. Wang
Signature date: 06 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ACMR holding

Class A Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 100,002
Date: 13 May 2026
Ownership: By Jing Chen, wife of David H. Wang

ACMR holding

Class A Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 45,837
Date: 13 May 2026
Ownership: By Sophia Wang, daughter of David H. Wang

ACMR holding

Class A Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 180,000
Date: 13 May 2026
Ownership: By David Hui Wang and Jing Chen Family Irrevocable Trust for Wang Children

ACMR holding

Class A Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 620,001
Date: 13 May 2026
Ownership: By Wang-Chen Family Living Trust

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ACMR transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +6,208
Change %
Price: $0.000000^*
Shares after: 6,208
Date: 13 May 2026
Ownership: By Sophia Wang, daughter of David H. Wang
Underlying class: Class A Common Stock
Underlying amount: 6,208
Exercise price
Footnotes: F1, F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Each restricted stock unit represents a contingent right to receive one share of ACMR common stock.

Footnote F2

The number of RSUs granted will be determined by dividing the applicable annual grant value by the 30-day lookback average fair market value of the Issuer's common stock, determined to be $51.54 per share.

Footnote F3

The restricted stock units vest in four equal annual installments beginning May 13, 2027.

SEC remarks

Chief Executive Officer, President and Director