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These shares were sold in multiple transactions at prices ranging from $83.61 to $84.4, 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), (3), (4), (5), (6), (7), and (8) to this Form 4."}],"balance_after":112053,"source":{"system":"sec-edgar","filing":"0001140361-26-024322","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036126024322/form4.xml","form_type":"4"}},{"id":748028,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common 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10,000 shares of Class A Common Stock of the Issuer."}],"balance_after":110002,"source":{"system":"sec-edgar","filing":"0001140361-25-003749","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036125003749/form4.xml","form_type":"4"}},{"id":1574818,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2024-03-16T01:32:05.000Z","date":"2024-03-14","kind":"sale","planned":true,"acquired":false,"shares":2383,"price":28.32,"value":67486.56,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 13, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.10 to $28.53, inclusive."}],"balance_after":100002,"source":{"system":"sec-edgar","filing":"0001140361-24-013645","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036124013645/form4.xml","form_type":"4"}},{"id":1574817,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2024-03-16T01:32:05.000Z","date":"2024-03-14","kind":"sale","planned":true,"acquired":false,"shares":2617,"price":27.49,"value":71941.33,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 13, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $27.03 to $27.88, inclusive."}],"balance_after":102385,"source":{"system":"sec-edgar","filing":"0001140361-24-013645","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036124013645/form4.xml","form_type":"4"}},{"id":1574816,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2024-03-16T01:32:05.000Z","date":"2024-03-13","kind":"sale","planned":true,"acquired":false,"shares":5000,"price":29.09,"value":145450.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 13, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.80 to $29.41, 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), (3) and (4) to this Form 4."}],"balance_after":105002,"source":{"system":"sec-edgar","filing":"0001140361-24-013645","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036124013645/form4.xml","form_type":"4"}},{"id":1740856,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2023-11-15T21:15:22.000Z","date":"2023-11-13","kind":"exercise","planned":true,"acquired":false,"shares":12500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On November 13, 2023, the reporting person exercised a previously issued stock option to purchase 12,500 shares of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The option is fully vested and exercisable."}],"balance_after":0,"derivative":{"exercise_price":4.62,"expiration_date":"2028-07-31","underlying":"Class A Common Stock","underlying_shares":12500},"source":{"system":"sec-edgar","filing":"0001140361-23-053443","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036123053443/form4.xml","form_type":"4"}},{"id":1740855,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2023-11-15T21:15:22.000Z","date":"2023-11-13","kind":"exercise","planned":true,"acquired":false,"shares":13500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 13, 2023, the reporting person exercised a previously issued stock option to purchase 13,500 shares of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The option is fully vested and exercisable."}],"balance_after":0,"derivative":{"exercise_price":5.33,"expiration_date":"2029-08-03","underlying":"Class A Common Stock","underlying_shares":13500},"source":{"system":"sec-edgar","filing":"0001140361-23-053443","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036123053443/form4.xml","form_type":"4"}},{"id":1740854,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-11-15T21:15:22.000Z","date":"2023-11-13","kind":"sale","planned":true,"acquired":false,"shares":26000,"price":16.79,"value":436540.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 11, 2023."},{"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 $16.52 to $17.07, inclusive."}],"balance_after":110002,"source":{"system":"sec-edgar","filing":"0001140361-23-053443","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036123053443/form4.xml","form_type":"4"}},{"id":1740853,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-11-15T21:15:22.000Z","date":"2023-11-13","kind":"exercise","planned":true,"acquired":true,"shares":12500,"price":4.62,"value":57750.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On November 13, 2023, the reporting person exercised a previously issued stock option to purchase 12,500 shares of Class A Common Stock of the Issuer."}],"balance_after":136002,"source":{"system":"sec-edgar","filing":"0001140361-23-053443","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036123053443/form4.xml","form_type":"4"}},{"id":1740852,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-11-15T21:15:22.000Z","date":"2023-11-13","kind":"exercise","planned":true,"acquired":true,"shares":13500,"price":5.33,"value":71955.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 13, 2023, the reporting person exercised a previously issued stock option to purchase 13,500 shares of Class A Common Stock of the Issuer."}],"balance_after":123502,"source":{"system":"sec-edgar","filing":"0001140361-23-053443","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036123053443/form4.xml","form_type":"4"}},{"id":1800826,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2023-08-22T01:18:53.000Z","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":"0001140361-23-040763","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036123040763/form4.xml","form_type":"4/A","original_submission_date":"2023-08-14"}},{"id":1808630,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, 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Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The option is fully vested and exercisable."}],"balance_after":13500,"derivative":{"exercise_price":5.33,"expiration_date":"2029-08-03","underlying":"Class A Common Stock","underlying_shares":16500},"source":{"system":"sec-edgar","filing":"0001140361-23-029035","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036123029035/form4.xml","form_type":"4"}},{"id":1862437,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock 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16,500 shares of Class A Common Stock of the Issuer."}],"balance_after":149002,"source":{"system":"sec-edgar","filing":"0001140361-23-029035","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036123029035/form4.xml","form_type":"4"}},{"id":1862434,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-06-09T01:49:19.000Z","date":"2023-06-06","kind":"exercise","planned":false,"acquired":true,"shares":22500,"price":4.62,"value":103950.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On June 6, 2023, the reporting person exercised a previously issued stock option to purchase 22,500 shares of Class A Common Stock of the Issuer."}],"balance_after":132502,"source":{"system":"sec-edgar","filing":"0001140361-23-029035","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036123029035/form4.xml","form_type":"4"}},{"id":2177055,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2022-08-23T00:00:20.000Z","date":"2022-08-18","kind":"sale","acquired":false,"shares":10000,"price":17.5,"value":175000.0,"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 $17.34 to $17.69, 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."}],"balance_after":110002,"source":{"system":"sec-edgar","filing":"0001140361-22-030526","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036122030526/form4.xml","form_type":"4"}},{"id":2179657,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2022-08-19T01:30:02.000Z","date":"2022-08-17","kind":"exercise","acquired":false,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"On August 17, 2022, the reporting person exercised a previously issued stock option to purchase 5,000 shares of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The option is fully vested and exercisable."}],"balance_after":35000,"derivative":{"exercise_price":4.62,"expiration_date":"2028-07-31","underlying":"Class A Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001140361-22-030318","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036122030318/form4.xml","form_type":"4"}},{"id":2179656,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2022-08-19T01:30:02.000Z","date":"2022-08-16","kind":"exercise","acquired":false,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On August 16, 2022, the reporting person exercised a previously issued stock option to purchase 5,000 shares of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The option is fully vested and exercisable."}],"balance_after":40000,"derivative":{"exercise_price":4.62,"expiration_date":"2028-07-31","underlying":"Class A Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001140361-22-030318","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036122030318/form4.xml","form_type":"4"}},{"id":2179655,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2022-08-19T01:30:02.000Z","date":"2022-08-17","kind":"sale","acquired":false,"shares":5818,"price":18.29,"value":106411.22,"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."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.16 to $18.53, inclusive."}],"balance_after":120002,"source":{"system":"sec-edgar","filing":"0001140361-22-030318","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036122030318/form4.xml","form_type":"4"}},{"id":2179654,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2022-08-19T01:30:02.000Z","date":"2022-08-17","kind":"sale","acquired":false,"shares":9182,"price":17.5,"value":160685.0,"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."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. 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The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 330 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on November 4, 2020 of $91.00, and issuing to the reporting person the remaining 19,670 shares of Class A Common Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option is fully vested and exercisable."}],"balance_after":13334,"derivative":{"exercise_price":1.5,"expiration_date":"2025-05-01","underlying":"Class A Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0001140361-20-025064","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036120025064/form4.xml","form_type":"4"}},{"id":2988326,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2020-11-09T22:30:22.000Z","date":"2020-11-05","kind":"tax_withholding","acquired":false,"shares":330,"price":91,"value":30030.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 5, 2020, the reporting person exercised, by net exercise, a previously issued stock option to purchase 20,000 shares of Class A Common Stock of the Issuer. The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 330 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on November 4, 2020 of $91.00, and issuing to the reporting person the remaining 19,670 shares of Class A Common Stock."}],"balance_after":63004,"source":{"system":"sec-edgar","filing":"0001140361-20-025064","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036120025064/form4.xml","form_type":"4"}},{"id":2988325,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2020-11-09T22:30:22.000Z","date":"2020-11-05","kind":"exercise","acquired":true,"shares":20000,"price":1.5,"value":30000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 5, 2020, the reporting person exercised, by net exercise, a previously issued stock option to purchase 20,000 shares of Class A Common Stock of the Issuer. The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 330 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on November 4, 2020 of $91.00, and issuing to the reporting person the remaining 19,670 shares of Class A Common Stock."}],"balance_after":63334,"source":{"system":"sec-edgar","filing":"0001140361-20-025064","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000114036120025064/form4.xml","form_type":"4"}},{"id":3032397,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock 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Subsequent to the filing of the original Form 4, the reporting person and the Issuer agreed that the reporting person would instead satisfy his obligations under the Equity Purchase Agreement by cancelling the reporting person's rights to purchase 13,393 shares of Class A Common Stock under an outstanding stock option agreement. On September 30, 2019, such rights were cancelled in exchange for payment to the reporting person of $166,675.89 in cash, representing the purchase price due to the reporting person pursuant to the Equity Purchase Agreement net of the exercise price attributable to the 13,393 shares cancelled under the reporting person's stock option. Because no outstanding shares of Class A Common Stock were ultimately sold by the reporting person pursuant to the Equity Purchase Agreement, the reduction in the number of such shares reflected in the original Form 4 is not reflected in this amendment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option is fully vested and exercisable."}],"balance_after":9941,"derivative":{"exercise_price":0.75,"expiration_date":"2021-05-01","underlying":"Class A Common Stock","underlying_shares":13393},"source":{"system":"sec-edgar","filing":"0001654954-19-011373","document":"section16.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000165495419011373/section16.xml","form_type":"4/A","original_submission_date":"2019-08-27"}},{"id":3428329,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2019-08-28T00:39:43.000Z","date":"2019-08-23","kind":"disposition_to_issuer","acquired":false,"shares":13393,"price":13.195,"value":176720.635,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In connection with a public offering of Class A Common Stock by the Issuer, the reporting person and certain other stockholders entered into an Equity Purchase Agreement dated August 4, 2019 pursuant to which the reporting person and such stockholders agreed to sell, and the Issuer agreed to purchase, shares of the Issuer's Common Stock funded by the net proceeds, if any, from the Issuer's sale of Class A Common Stock pursuant to an exercise of the underwriters' over-allotment option. The transaction being reported relates to the reporting person's sale under the Equity Purchase Agreement. The obligations of the parties to the Equity Purchase Agreement became fixed and irrevocable as of the transaction date, which is the date of the closing of the underwriters' over-allotment option."}],"balance_after":29941,"source":{"system":"sec-edgar","filing":"0001654954-19-010057","document":"section16.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721279/000165495419010057/section16.xml","form_type":"4"}},{"id":3445675,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":40942,"kind":"person","name":"Cheav Sotheara","position":1,"cik":"0001721279","reported_name":"Cheav Sotheara","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock 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on a 1-for-1 basis upon certain transfers of such shares and at the holder's election, and has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Class B Common Stock of the Issuer is convertible into Class A Common Stock of the Issuer on a 1-for-1 basis upon certain transfers of such shares and at the holder's election, and has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Class B Common Stock of the Issuer is convertible into Class A Common Stock of the Issuer on a 1-for-1 basis upon certain transfers of such shares and at the holder's election, and has no expiration date."}],"balance_after":0,"derivative":{"underlying":"Class A Common 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