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            <secFileNumber>001-38273</secFileNumber>
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                <ns2:city>Fremont</ns2:city>
                <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                <ns2:zipCode>94539</ns2:zipCode>
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            <issuerContactPhone>(510) 445-3700</issuerContactPhone>
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            <relationshipsToIssuer>
                <relationshipToIssuer>Director</relationshipToIssuer>
            </relationshipsToIssuer>
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        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>19097</noOfUnitsSold>
            <aggregateMarketValue>345277.58</aggregateMarketValue>
            <noOfUnitsOutstanding>62470824</noOfUnitsOutstanding>
            <approxSaleDate>08/29/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
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            <acquiredDate>08/14/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Exercised Shares</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>19097</amountOfSecuritiesAcquired>
            <paymentDate>08/14/2024</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
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                <address>
                    <ns2:street1>42307 Osgood Road, Suite I</ns2:street1>
                    <ns2:city>Fremont</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>94539</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>08/22/2024</saleDate>
            <amountOfSecuritiesSold>15000</amountOfSecuritiesSold>
            <grossProceeds>297744.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>08/29/2024</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>05/17/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Haiping Dun</signature>
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144
0001721581
XXXXXXXX
LIVE
0001680062
ACM RESEARCH, INC.
001-38273
42307 Osgood Road, Suite I
Fremont
CA
94539
(510) 445-3700
HAIPING DUN
Director
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
19097
345277.58
62470824
08/29/2024
NASDAQ
COMMON
08/14/2024
Exercised Shares
ISSUER
N
19097
08/14/2024
Cash
N
HAIPING DUN
42307 Osgood Road, Suite I
Fremont
CA
94539
Common
08/22/2024
15000
297744.00
08/29/2024
05/17/2023
/s/ Haiping Dun