FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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OMB Number: 3235-0287
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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 David H 		2. Issuer Name and Ticker or Trading Symbol

ACM Research, Inc. [ ACMR ] 		5. 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
(Last)          (First)          (Middle)

C/O ACM RESEARCH, INC., 42307 OSGOOD ROAD, SUITE I 		3. Date of Earliest Transaction (MM/DD/YYYY)

6/29/2018
(Street)

FREMONT, CA 94539
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
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 Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Class A Common Stock   6/29/2018     M (1)    15279   A $3   15279   I   By Sophia Wang, daughter of David H. Wang  
Class A Common Stock                  166667   D    
Class A Common Stock                  60000   I   By David Hui Wang and Jing Chen Family Irrevocable Trust for Wang Children  
Class A Common Stock                  206667   I   By Wang-Chen Family Living Trust  

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option   $3   6/29/2018     M   (1)       15279      (2) 12/27/2026   Class A Common Stock   15279   $0   0   I   By Sophia Wang, daughter of David H. Wang  

Explanation of Responses:
(1)  Sophia Wang, who is the daughter of the reporting person and whose shares are deemed indirectly beneficially owned by the reporting person, previously held options to acquire up to 18,334 shares of Class A Common Stock of the Issuer. On June 29, 2018, Ms. Wang exercised options to purchase 15,279 shares of Class A Common Stock of the Issuer. The options to purchase the remaining 3,055 shares of Class A Common Stock have terminated.
(2)  As of the transaction date, 15,279 shares had vested.

Remarks:
Chief Executive Officer, President and Director

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

Signatures
/s/ Mark L. Johnson, Attorney-in-Fact for David H. Wang 7/3/2018
** 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 4(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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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