Haiping Dun - 12 Aug 2025 Form 4 Insider Report for ACM Research, Inc. (ACMR)

Role: Director
Signature: /s/ Mark McKechnie, Attorney-in-Fact for Haiping Dun
Issuer symbol: ACMR
Transactions as of: 12 Aug 2025
Net transactions value: $0
Form type: 4
Filing time: 14 Aug 2025, 16:30:28 UTC
Previous filing: 18 Mar 2025
Next filing: 14 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Dun Haiping	Director	C/O ACM RESEARCH, INC., 42307 OSGOOD ROAD, SUITE I, FREMONT	/s/ Mark McKechnie, Attorney-in-Fact for Haiping Dun	14 Aug 2025	0001721581

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	Award	$0	+20,000		$0.000000	20,000	12 Aug 2025	Class A Common Stock	20,000	$24.93	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The option will vest and become exercisable immediately prior to the 2026 annual meeting of stockholders of the issuer, subject to continued service through the vesting date.