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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1680062	Acm Research Inc.	ACMR	Special Industry Machinery, Nec (3559)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1721580	H David Wang	C/O Acm Research, Inc. 42307 Osgood Road, Suite I Fremont CA 94539	See Remarks	No	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Class A Common Stock	Disposition	2024-11-26	46,766	$17.80	663,740	No	4	S	Direct
Class A Common Stock	Disposition	2024-11-26	9,484	$18.31	654,256	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	S	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Class A Common Stock	100,002	Indirect	By Jing Chen, wife of David H. Wang
Class A Common Stock	45,837	Indirect	By Sophia Wang, daughter of David H. Wang
Class A Common Stock	180,000	Indirect	By David Hui Wang and Jing Chen Family Irrevocable Trust for Wang Children
Class A Common Stock	620,001	Indirect	By Wang-Chen Family Living Trust

Footnotes

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 14, 2024, as amended on August 13, 2024.
The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $17.23 to $18.22, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) and (3) to this Form 4.
The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $18.23 to $18.39, inclusive.