0001680062 2021-05-06 2021-05-06 false CA 00-0000000 42307 OSGOOD ROAD, SUITE I FREMONT CA false 0001680062 NASDAQ 8-K 2021-05-06 ACM Research, Inc. 001-38273 94539 510 445-3700 false false false false Class A Common Stock, par value $0.0001 per share ACMR