Amended Statement of Beneficial Ownership (3/a)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person * Wang Jian	2. Date of Event Requiring Statement (MM/DD/YYYY) 11/2/2017	3. Issuer Name and Ticker or Trading Symbol ACM Research, Inc. [ACMR]
(Last)        (First)        (Middle) C/O ACM RESEARCH, INC., 42307 OSGOOD ROAD, SUITE I	4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                            _____ 10% Owner ___ X ___ Officer (give title below)          _____ Other (specify below) See remarks /
(Street) FREMONT, CA 94539        (City)              (State)              (Zip)	5. If Amendment, Date Original Filed (MM/DD/YYYY) 11/2/2017	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)

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: 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
Warrant (Right to Buy)   (1)	(2)	5/17/2023	Class A Common Stock	397502	$7.50	I	By Shengxin (Shanghai) Management Consulting Limited Partnership

Explanation of Responses:
(1)	Represents a warrant held by Shengxin (Shanghai) Management Consulting Limited Partnership ("SMC"), which was inadvertently omitted from Mr. Wang's original Form 3 filing. Mr. Wang is a general partner of SMC and therefore may be deemed to beneficially own the securities held by SMC.
(2)	The warrant became exercisable immediately after the closing of the Issuer's initial public offering, which occurred on November 7, 2017.

Remarks: Vice President, Research and Development of ACM Research (Shanghai), Inc., a subsidiary of the Issuer

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Wang Jian C/O ACM RESEARCH, INC. 42307 OSGOOD ROAD, SUITE I FREMONT, CA 94539			See remarks

Signatures
/s/ Mark L. Johnson, Attorney-in-Fact for Jian Wang		7/31/2018
** 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).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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