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

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Expires: February 28, 2011
Estimated average burden hours per response... 0.5

(Print or Type Responses)
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 (Month/Day/Year)
05/14/2024
(Street)

FREMONT, CA 94539		 4. If Amendment, Date 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
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction 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 05/14/2024   M(1)   180,000 A $ 0.5 684,018 D  
Class A Common Stock 05/14/2024   F(1)   3,910 D $ 23.02 680,108 D  
Class A Common Stock               100,002 I By Jing Chen, wife of David H. Wang
Class A Common Stock               45,837 I By Sophia Wang, daughter of David H. Wang
Class A Common Stock               180,000 I By David Hui Wang and Jing Chen Family Irrevocable Trust for Wang Children
Class A Common Stock               620,001 I By Wang-Chen Family Living Trust

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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. SEC 1474 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction 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
(Month/Day/Year) 		7. Title and Amount of Underlying Securities
(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 $ 0.5 05/14/2024   M(1)     180,000   (2) 04/30/2025 Class A Common Stock 180,000 $ 0 480,000 D  

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 McKechnie, Attorney-in-Fact for David H. Wang   05/16/2024
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) On May 14, 2024, the reporting person exercised, by net exercise, a previously issued stock option to purchase 180,000 shares of Class A Common Stock of the Issuer. The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 3,910 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on May 13, 2024 of $23.02, and issuing to the reporting person the remaining 176,090 shares of Class A Common Stock.
(2) The option is fully vested and exercisable.
 
Remarks:
Chief Executive Officer, President and Director

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.