David H. Wang - Sep 8, 2025 Form 4 Insider Report for ACM Research, Inc. (ACMR)

Role
Chief Executive Officer, President and Director, Director, 10%+ Owner
Signature
/s/ Mark McKechnie, Attorney-in-Fact for David H. Wang
Stock symbol
ACMR
Transactions as of
Sep 8, 2025
Transactions value $
$130,000
Form type
4
Date filed
9/30/2025, 09:33 PM
Previous filing
Sep 5, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Wang David H Chief Executive Officer, President and Director, Director, 10%+ Owner C/O ACM RESEARCH, INC., 42307 OSGOOD ROAD, SUITE I, FREMONT /s/ Mark McKechnie, Attorney-in-Fact for David H. Wang 2025-09-30 0001721580

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ACMR Class A Common Stock Options Exercise $130K +130K +19.32% $1.00 803K Sep 8, 2025 Direct F1
holding ACMR Class A Common Stock 100K Sep 8, 2025 By Jing Chen, wife of David H. Wang
holding ACMR Class A Common Stock 45.8K Sep 8, 2025 By Sophia Wang, daughter of David H. Wang
holding ACMR Class A Common Stock 180K Sep 8, 2025 By David Hui Wang and Jing Chen Family Irrevocable Trust for Wang Children
holding ACMR Class A Common Stock 620K Sep 8, 2025 By Wang-Chen Family Living Trust

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction ACMR Stock Option Options Exercise $0 -130K -17.57% $0.00 610K Sep 8, 2025 Class A Common Stock 130K $1.00 Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 On September 8, 2025, the reporting person exercised, by net exercise, a previously issued stock option to purchase 130,000 shares of Class A Common Stock of the Issuer.
F2 The option is fully vested and exercisable.

Remarks:

Chief Executive Officer, President and Director