0001680062 2021-11-04 2021-11-04 false 0001680062 8-K 2021-11-04 ACM Research, Inc. DE 001-38273 94-3290283 42307 Osgood Road, Suite I Fremont CA 94539 510 445-3700 false false false false Class A Common Stock, par value $0.0001 per share ACMR NASDAQ false