X0206 3 2017-11-02 0 0001680062 ACM Research, Inc. ACMR 0001721375 Xu Min C/O ACM RESEARCH, INC. 42307 OSGOOD ROAD, SUITE I FREMONT CA 94539 0 1 0 0 See Remarks Stock Option 3.00 2026-12-27 Class A Common Stock 100000 D The option will vest and become exercisable as to 33,333 shares on November 14, 2017 and the remaining 66,667 shares will vest and become exercisable in equal monthly installments over the following 24 months, subject to continued service through each vesting date. Chief Financial Officer and Treasurer /s/ Mark L. Johnson, Attorney-in-Fact for Min Xu 2017-11-02