    <SEC-DOCUMENT>0001140361-22-020154-index.html : 20220523
    <SEC-HEADER>0001140361-22-020154.hdr.sgml : 20220523
    <ACCEPTANCE-DATETIME>20220523060343
    ACCESSION NUMBER:		0001140361-22-020154
    CONFORMED SUBMISSION TYPE:	DEFR14A
    PUBLIC DOCUMENT COUNT:		4
    FILED AS OF DATE:		20220523
    DATE AS OF CHANGE:		20220523

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ACM Research, Inc.
    		CENTRAL INDEX KEY:			0001680062
    		STANDARD INDUSTRIAL CLASSIFICATION:	SPECIAL INDUSTRY MACHINERY, NEC [3559]
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			CA
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFR14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-38273
    		FILM NUMBER:		22949485

    	BUSINESS ADDRESS:
    		STREET 1:		42307 OSGOOD ROAD, SUITE I
    		CITY:			FREMONT
    		STATE:			CA
    		ZIP:			94539
    		BUSINESS PHONE:		510-445-3700

    	MAIL ADDRESS:
    		STREET 1:		42307 OSGOOD ROAD, SUITE I
    		CITY:			FREMONT
    		STATE:			CA
    		ZIP:			94539
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFR14A
    <SEQUENCE>1
    <FILENAME>ny20002008x4_defr14a.htm
    <DESCRIPTION>DEFR14A
    <TEXT>
    Document 1 - file: ny20002008x4_defr14a.htm

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    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>ny20002008x4_logo.jpg
    <TEXT>
    Document 2 - file: ny20002008x4_logo.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>ny20002008x4_nac01.jpg
    <TEXT>
    Document 3 - file: ny20002008x4_nac01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>ny20002008x4_nac02.jpg
    <TEXT>
    Document 4 - file: ny20002008x4_nac02.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>