SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Wang David H (Last) (First) (Middle) C/O ACM RESEARCH, INC. 42307 OSGOOD ROAD, SUITE I (Street) FREMONT CA 94539 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 11/02/2017	3. Issuer Name and Ticker or Trading Symbol ACM Research, Inc. [ ACMR ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner X Officer (give title below) Other (specify below) See Remarks	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Common Stock	166,667	D
Class B Common Stock	1,146,934	D
Class A Common Stock	60,000	I	By the David Hui Wang and Jing Chen Family Irrevocable Trust for Wang Children
Class B Common Stock	7,334	I	By the David Hui Wang and Jing Chen Family Irrevocable Trust for Wang Children
Class A Common Stock	206,667	I	By the Wang-Chen Family Living Trust
Class B Common Stock	33,334	I	By Jing Chen, wife of David H. Wang
Class B Common Stock	117,334	I	By Brian Wang, son of David H. Wang
Class B Common Stock	117,334	I	By Sophia Wang, daughter of David H. Wang

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option	(1)	05/01/2021	Class A Common Stock	133,334	0.75	D
Stock Option	(2)	05/01/2021	Class A Common Stock	166,667	0.75	D
Stock Option	(3)	05/01/2025	Class A Common Stock	400,000	1.5	D
Stock Option	(4)	12/27/2026	Class A Common Stock	333,334	3	D
Stock Option	(5)	12/27/2026	Class A Common Stock	18,334	3	I	By Sophia Wang, daughter of David H. Wang

Explanation of Responses:

1. Option was fully vested on May 1, 2011.

2. Option was fully vested on May 1, 2011.

3. The option vested and became exercisable as to 100,000 shares on May 1, 2016 and the remaining 300,000 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.

4. The option will vest and become exercisable as to 83,333 shares on January 1, 2018 and the remaining 250,001 shares will vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.

5. The option vested and became exercisable as to 9,167 shares on July 5, 2017 and the remaining 9,167 shares vest and become exercisable in equal monthly installments over the following 12 months, subject to continued service through each vesting date.

Remarks:

Chief Executive Officer, President and Director

	/s/ Mark L Johnson, Attorney-in-Fact for David H. Wang	11/02/2017
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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