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| <?xml version="1.0" encoding="windows-1252"?> |
| <ownershipDocument> |
| <schemaVersion> X0306 </schemaVersion> |
| <documentType> 4 </documentType> |
| <periodOfReport> 2022-08-22 </periodOfReport> |
| <issuer> |
| | <issuerCik> 0001680062 </issuerCik> |
| | <issuerName> ACM Research, Inc. </issuerName> |
| | <issuerTradingSymbol> ACMR </issuerTradingSymbol> |
| | </issuer> |
| <reportingOwner> |
| | <reportingOwnerId> |
| | | <rptOwnerCik> 0001721581 </rptOwnerCik> |
| | | <rptOwnerName> Dun Haiping </rptOwnerName> |
| | | </reportingOwnerId> |
| | <reportingOwnerAddress> |
| | | <rptOwnerStreet1> C/O ACM RESEARCH, INC. </rptOwnerStreet1> |
| | | <rptOwnerStreet2> 42307 OSGOOD ROAD, SUITE I </rptOwnerStreet2> |
| | | <rptOwnerCity> FREMONT </rptOwnerCity> |
| | | <rptOwnerState> CA </rptOwnerState> |
| | | <rptOwnerZipCode> 94539 </rptOwnerZipCode> |
| | | <rptOwnerStateDescription></rptOwnerStateDescription> |
| | | </reportingOwnerAddress> |
| | <reportingOwnerRelationship> |
| | | <isDirector> true </isDirector> |
| | | </reportingOwnerRelationship> |
| | </reportingOwner> |
| <nonDerivativeTable> |
| | <nonDerivativeTransaction> |
| | | <securityTitle> |
| <value> Class A Common Stock </value> |
| </securityTitle> |
| | | <transactionDate> |
| <value> 2022-08-22 </value> |
| </transactionDate> |
| | | <transactionCoding> |
| <transactionFormType> 4 </transactionFormType> |
| <transactionCode> S </transactionCode> |
| <equitySwapInvolved> 0 </equitySwapInvolved> |
| <footnoteId id="F1"/> |
| </transactionCoding> |
| | | <transactionAmounts> |
| <transactionShares> |
| <value> 36537 </value> |
| </transactionShares> |
| <transactionPricePerShare> |
| <value> 16.1 </value> |
| <footnoteId id="F2"/> |
| </transactionPricePerShare> |
| <transactionAcquiredDisposedCode> |
| <value> D </value> |
| </transactionAcquiredDisposedCode> |
| </transactionAmounts> |
| | | <postTransactionAmounts> |
| <sharesOwnedFollowingTransaction> |
| <value> 855090 </value> |
| </sharesOwnedFollowingTransaction> |
| </postTransactionAmounts> |
| | | <ownershipNature> |
| <directOrIndirectOwnership> |
| <value> D </value> |
| </directOrIndirectOwnership> |
| </ownershipNature> |
| | | </nonDerivativeTransaction> |
| | </nonDerivativeTable> |
| <footnotes> |
| | <footnote id="F1"> The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. </footnote> |
| | <footnote id="F2"> The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.88 to $16.32, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) to this Form 4. </footnote> |
| | </footnotes> |
| <ownerSignature> |
| | <signatureName> /s/ Mark McKechnie, Attorney-in-Fact for Haiping Dun </signatureName> |
| | <signatureDate> 2022-08-24 </signatureDate> |
| | </ownerSignature> |
| </ownershipDocument> |
