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purchase 7,500 shares of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The option is fully vested and exercisable."}],"balance_after":67500,"derivative":{"exercise_price":5.6,"expiration_date":"2029-04-22","underlying":"Class A Common Stock","underlying_shares":7500},"source":{"system":"sec-edgar","filing":"0001140361-23-059931","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123059931/form4.xml","form_type":"4"}},{"id":1698410,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-12-29T02:00:24.000Z","date":"2023-12-26","kind":"sale","planned":true,"acquired":false,"shares":7500,"price":20,"value":150000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 14, 2023."}],"balance_after":50001,"source":{"system":"sec-edgar","filing":"0001140361-23-059931","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123059931/form4.xml","form_type":"4"}},{"id":1698409,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-12-29T02:00:24.000Z","date":"2023-12-26","kind":"exercise","planned":true,"acquired":true,"shares":7500,"price":5.6,"value":42000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On December 26, 2023, the reporting person exercised a previously issued stock option to purchase 7,500 shares of Class A Common Stock of the Issuer."}],"balance_after":57501,"source":{"system":"sec-edgar","filing":"0001140361-23-059931","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123059931/form4.xml","form_type":"4"}},{"id":1800428,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2023-08-22T01:18:54.000Z","date":"2023-08-10","kind":"grant","planned":false,"acquired":false,"shares":100000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"This Form 4 amendment has been filed solely to correct the exercise price of the stock option to purchase shares of Class A Common Stock of the Issuer reported in a Form 4 filed on August 14, 2023 (the \"Form 4\"). The exercise price was inadvertently stated as $13.24 in the Form 4. The exercise price should have been stated as $13.89 in the Form 4."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option will vest and become exercisable as to 25,000 shares on August 10, 2024 and the remaining 75,000 shares will vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date."}],"balance_after":100000,"derivative":{"exercise_price":13.89,"expiration_date":"2033-08-09","underlying":"Class A Common Stock","underlying_shares":100000},"source":{"system":"sec-edgar","filing":"0001140361-23-040764","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123040764/form4.xml","form_type":"4/A","original_submission_date":"2023-08-14"}},{"id":1808158,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2023-08-14T21:30:56.000Z","date":"2023-08-10","kind":"grant","planned":false,"acquired":false,"shares":100000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option will vest and become exercisable as to 25,000 shares on August 10, 2024 and the remaining 75,000 shares will vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date."}],"balance_after":100000,"derivative":{"exercise_price":13.24,"expiration_date":"2033-08-09","underlying":"Class A Common Stock","underlying_shares":100000},"source":{"system":"sec-edgar","filing":"0001140361-23-039743","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123039743/form4.xml","form_type":"4"}},{"id":1835084,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2023-07-05T22:52:13.000Z","date":"2023-07-03","kind":"exercise","planned":false,"acquired":false,"shares":22500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option was fully vested and exercisable."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Due to an administrative error, the reporting person's previous Form 4 filed on March 13, 2023 reflected an incorrect amount of zero for number of derivative securities beneficially owned following reported transaction(s) in Column 9 rather than 22,500. This filing corrects that error."}],"balance_after":0,"derivative":{"exercise_price":1.77,"expiration_date":"2028-01-24","underlying":"Class A Common Stock","underlying_shares":22500},"source":{"system":"sec-edgar","filing":"0001140361-23-033166","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123033166/form4.xml","form_type":"4"}},{"id":1835083,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-07-05T22:52:13.000Z","date":"2023-07-03","kind":"sale","planned":false,"acquired":false,"shares":22500,"price":15,"value":337500.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person."}],"balance_after":50001,"source":{"system":"sec-edgar","filing":"0001140361-23-033166","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123033166/form4.xml","form_type":"4"}},{"id":1835082,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-07-05T22:52:13.000Z","date":"2023-07-03","kind":"exercise","planned":false,"acquired":true,"shares":22500,"price":1.77,"value":39825.0,"ownership":{"direct":true},"balance_after":72501,"source":{"system":"sec-edgar","filing":"0001140361-23-033166","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123033166/form4.xml","form_type":"4"}},{"id":1956296,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2023-03-14T01:00:59.000Z","date":"2023-03-09","kind":"exercise","acquired":false,"shares":22500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The option was fully vested and exercisable."}],"balance_after":0,"derivative":{"exercise_price":1.77,"expiration_date":"2028-01-24","underlying":"Class A Common Stock","underlying_shares":22500},"source":{"system":"sec-edgar","filing":"0001140361-23-011465","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123011465/form4.xml","form_type":"4"}},{"id":1956295,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-03-14T01:00:59.000Z","date":"2023-03-09","kind":"sale","acquired":false,"shares":1110,"price":12.55,"value":13930.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.50 to $12.59, inclusive."}],"balance_after":50001,"source":{"system":"sec-edgar","filing":"0001140361-23-011465","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123011465/form4.xml","form_type":"4"}},{"id":1956294,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-03-14T01:00:59.000Z","date":"2023-03-09","kind":"sale","acquired":false,"shares":9144,"price":12.44,"value":113751.36,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.40 to $12.50, inclusive."}],"balance_after":51111,"source":{"system":"sec-edgar","filing":"0001140361-23-011465","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123011465/form4.xml","form_type":"4"}},{"id":1956293,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-03-14T01:00:59.000Z","date":"2023-03-09","kind":"sale","acquired":false,"shares":9546,"price":12.33,"value":117702.18,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.29 to $12.39, inclusive."}],"balance_after":60255,"source":{"system":"sec-edgar","filing":"0001140361-23-011465","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123011465/form4.xml","form_type":"4"}},{"id":1956292,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-03-14T01:00:59.000Z","date":"2023-03-09","kind":"sale","acquired":false,"shares":2700,"price":12.21,"value":32967.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.18 to $12.26, 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 footnotes (2) through (5) to this Form 4."}],"balance_after":69801,"source":{"system":"sec-edgar","filing":"0001140361-23-011465","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123011465/form4.xml","form_type":"4"}},{"id":1956291,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-03-14T01:00:59.000Z","date":"2023-03-09","kind":"exercise","acquired":true,"shares":22500,"price":1.77,"value":39825.0,"ownership":{"direct":true},"balance_after":72501,"source":{"system":"sec-edgar","filing":"0001140361-23-011465","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123011465/form4.xml","form_type":"4"}},{"id":2065513,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2023-01-04T23:09:13.000Z","date":"2022-12-31","kind":"grant","acquired":true,"shares":22500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On March 4, 2022, the reporting person was granted an option to purchase 30,000 shares of Class A Common Stock of the Issuer. The option vests and becomes exercisable based on the Issuer's satisfaction of certain performance criteria. On December 31, 2022, the Issuer confirmed that certain of the performance criteria were met, resulting in vesting of the option as to 22,500 shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On March 4, 2022, the reporting person was granted an option to purchase 30,000 shares of Class A Common Stock of the Issuer. The option vests and becomes exercisable based on the Issuer's satisfaction of certain performance criteria. On December 31, 2022, the Issuer confirmed that certain of the performance criteria were met, resulting in vesting of the option as to 22,500 shares."}],"balance_after":22500,"derivative":{"exercise_price":25.45,"expiration_date":"2032-03-03","underlying":"Class A Common Stock","underlying_shares":22500},"source":{"system":"sec-edgar","filing":"0001140361-23-000514","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123000514/form4.xml","form_type":"4"}},{"id":2522466,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock 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Stock","underlying_shares":2437},"source":{"system":"sec-edgar","filing":"0001140361-21-036877","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036121036877/form4.xml","form_type":"4"}},{"id":2522465,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2021-11-05T21:47:42.000Z","date":"2021-11-03","kind":"exercise","acquired":true,"shares":2437,"price":5.6,"value":13647.2,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 3, 2021, the reporting person exercised a previously issued stock option to purchase 2,437 shares of Class A Common Stock of the Issuer."}],"balance_after":16667,"source":{"system":"sec-edgar","filing":"0001140361-21-036877","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036121036877/form4.xml","form_type":"4"}},{"id":2818669,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng Lisa","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2021-03-02T22:36:18.000Z","date":"2021-02-26","kind":"exercise","acquired":false,"shares":3470,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 26, 2021, the reporting person exercised a previously issued stock option to purchase 3,470 shares of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option vested and became exercisable as to 4,167 shares on August 15, 2018 and the remaining 12,500 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date."}],"balance_after":2437,"derivative":{"exercise_price":5.6,"expiration_date":"2027-11-01","underlying":"Class A Common Stock","underlying_shares":3470},"source":{"system":"sec-edgar","filing":"0001140361-21-006959","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036121006959/form4.xml","form_type":"4"}},{"id":2818668,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":61968,"kind":"person","name":"Feng Lisa","position":1,"cik":"0001779777","reported_name":"Feng 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