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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
1779777	Lisa Feng	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	Acquisiton	2020-09-16	15,000	$5.31	25,760	No	4	M	Direct
Class A Common Stock	Disposition	2020-09-16	15,000	$72.30	10,760	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Class A Common Stock	Stock Option	Disposition	2020-09-16	15,000	$0.00	15,000	$5.31

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
15,000		2028-01-24	No	4	M	Direct

Footnotes

On September 16, 2020, the reporting person exercised a previously issued stock option to purchase 15,000 shares of Class A Common Stock of the Issuer.
The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
The option vested and became exercisable as to 7,500 shares on January 1, 2019 and the remaining 22,500 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.