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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), and (5) to this Form 4."}],"balance_after":123556,"source":{"system":"sec-edgar","filing":"0001140361-26-009239","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036126009239/form4.xml","form_type":"4"}},{"id":846132,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Class A Common 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Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The option is fully vested and exercisable."}],"balance_after":32000,"derivative":{"exercise_price":5.6,"expiration_date":"2029-04-22","underlying":"Class A Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0001140361-23-059932","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036123059932/form4.xml","form_type":"4"}},{"id":1698646,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Class A Common 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Stock","published_at":"2023-12-29T02:02:13.000Z","date":"2023-12-26","kind":"exercise","planned":true,"acquired":true,"shares":10000,"price":5.6,"value":56000.0,"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 10,000 shares of Class A Common Stock of the Issuer."}],"balance_after":120772,"source":{"system":"sec-edgar","filing":"0001140361-23-059932","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036123059932/form4.xml","form_type":"4"}},{"id":1731312,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Stock Option","published_at":"2023-11-22T21:15:34.000Z","date":"2023-11-20","kind":"exercise","planned":true,"acquired":false,"shares":15000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 20, 2023, the reporting person exercised a previously issued stock option to purchase 15,000 shares of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The option is fully vested and exercisable."}],"balance_after":0,"derivative":{"exercise_price":7.36,"expiration_date":"2030-03-19","underlying":"Class A Common Stock","underlying_shares":15000},"source":{"system":"sec-edgar","filing":"0001140361-23-054444","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036123054444/form4.xml","form_type":"4"}},{"id":1731311,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Class A Common Stock","published_at":"2023-11-22T21:15:34.000Z","date":"2023-11-20","kind":"sale","planned":true,"acquired":false,"shares":15000,"price":17.91,"value":268650.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 21, 2023."},{"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 $17.68 to $18.09, inclusive."}],"balance_after":36924,"source":{"system":"sec-edgar","filing":"0001140361-23-054444","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036123054444/form4.xml","form_type":"4"}},{"id":1731310,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Class A Common Stock","published_at":"2023-11-22T21:15:34.000Z","date":"2023-11-20","kind":"exercise","planned":true,"acquired":true,"shares":15000,"price":7.36,"value":110400.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 20, 2023, the reporting person exercised a previously issued stock option to purchase 15,000 shares of Class A Common Stock of the Issuer."}],"balance_after":51924,"source":{"system":"sec-edgar","filing":"0001140361-23-054444","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036123054444/form4.xml","form_type":"4"}},{"id":1800824,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Stock Option","published_at":"2023-08-22T01:19:00.000Z","date":"2023-08-10","kind":"grant","planned":false,"acquired":false,"shares":24000,"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":"F3","text":"The option will vest and become exercisable immediately prior to the 2024 annual meeting of stockholders of the issuer, subject to continued service through the vesting date."}],"balance_after":24000,"derivative":{"exercise_price":13.89,"expiration_date":"2033-08-09","underlying":"Class A Common Stock","underlying_shares":24000},"source":{"system":"sec-edgar","filing":"0001140361-23-040766","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036123040766/form4.xml","form_type":"4/A","original_submission_date":"2023-08-14"}},{"id":1800823,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Stock Option","published_at":"2023-08-22T01:19:00.000Z","date":"2023-08-10","kind":"grant","planned":false,"acquired":false,"shares":30000,"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 7,500 shares on August 10, 2024 and the remaining 22,500 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":30000,"derivative":{"exercise_price":13.89,"expiration_date":"2033-08-09","underlying":"Class A Common Stock","underlying_shares":30000},"source":{"system":"sec-edgar","filing":"0001140361-23-040766","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036123040766/form4.xml","form_type":"4/A","original_submission_date":"2023-08-14"}},{"id":1808629,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, 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Stock","underlying_shares":24000},"source":{"system":"sec-edgar","filing":"0001140361-23-039741","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036123039741/form4.xml","form_type":"4"}},{"id":1808628,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Stock Option","published_at":"2023-08-14T21:30:45.000Z","date":"2023-08-10","kind":"grant","planned":false,"acquired":false,"shares":30000,"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 7,500 shares on August 10, 2024 and the remaining 22,500 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":30000,"derivative":{"exercise_price":13.24,"expiration_date":"2033-08-09","underlying":"Class A Common Stock","underlying_shares":30000},"source":{"system":"sec-edgar","filing":"0001140361-23-039741","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036123039741/form4.xml","form_type":"4"}},{"id":2214807,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Stock 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Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Stock Option","published_at":"2021-03-06T02:46:07.000Z","date":"2021-02-22","kind":"grant","acquired":true,"shares":5000,"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 a previously issued stock option to purchase shares of Class A Common Stock of the Issuer reported in a Form 4 filed on March 3, 2021 (the \"Form 4\"). The exercise price was inadvertently stated as $119.98 in the Form 4. The exercise price should have been stated as $111.98 in the Form 4."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option will vest and become exercisable immediately prior to the 2022 Annual Meeting of Stockholders of the Issuer, subject to continued service through the vesting date."}],"balance_after":5000,"derivative":{"exercise_price":111.98,"expiration_date":"2031-02-21","underlying":"Class A Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001140361-21-007577","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036121007577/form4.xml","form_type":"4/A","original_submission_date":"2021-03-03"}},{"id":2814117,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Stock Option","published_at":"2021-03-03T22:31:00.000Z","date":"2021-02-22","kind":"grant","acquired":true,"shares":5000,"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 immediately prior to the 2022 Annual Meeting of Stockholders of the Issuer, subject to continued service through the vesting date."}],"balance_after":5000,"derivative":{"exercise_price":119.98,"expiration_date":"2031-02-21","underlying":"Class A Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001140361-21-007226","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036121007226/form4.xml","form_type":"4"}},{"id":2859319,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Class A Common Stock","published_at":"2021-02-16T23:05:27.000Z","date":"2021-02-12","kind":"sale","acquired":false,"shares":2000,"price":120,"value":240000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person."}],"balance_after":36924,"source":{"system":"sec-edgar","filing":"0001140361-21-005068","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036121005068/form4.xml","form_type":"4"}},{"id":2866774,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Class A Common Stock","published_at":"2021-02-11T22:30:42.000Z","date":"2021-02-10","kind":"sale","acquired":false,"shares":1600,"price":110,"value":176000.0,"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":38924,"source":{"system":"sec-edgar","filing":"0001140361-21-004424","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036121004424/form4.xml","form_type":"4"}},{"id":2866773,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Class A Common Stock","published_at":"2021-02-11T22:30:42.000Z","date":"2021-02-09","kind":"sale","acquired":false,"shares":400,"price":110,"value":44000.0,"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":40524,"source":{"system":"sec-edgar","filing":"0001140361-21-004424","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036121004424/form4.xml","form_type":"4"}},{"id":2912339,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Class A Common Stock","published_at":"2021-01-08T22:30:27.000Z","date":"2021-01-06","kind":"sale","acquired":false,"shares":2000,"price":100,"value":200000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person."}],"balance_after":40924,"source":{"system":"sec-edgar","filing":"0001140361-21-000718","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036121000718/form4.xml","form_type":"4"}},{"id":3033289,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Stock Option","published_at":"2020-09-11T21:30:20.000Z","date":"2020-09-10","kind":"exercise","acquired":false,"shares":6000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On September 10, 2020, the reporting person exercised a previously issued stock option to purchase 6,000 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 5,000 shares on April 23, 2020 and the remaining 15,000 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date."}],"balance_after":14000,"derivative":{"exercise_price":16.81,"expiration_date":"2029-04-22","underlying":"Class A Common Stock","underlying_shares":6000},"source":{"system":"sec-edgar","filing":"0001140361-20-020280","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036120020280/form4.xml","form_type":"4"}},{"id":3033288,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Class A Common Stock","published_at":"2020-09-11T21:30:20.000Z","date":"2020-09-10","kind":"exercise","acquired":true,"shares":6000,"price":16.81,"value":100860.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On September 10, 2020, the reporting person exercised a previously issued stock option to purchase 6,000 shares of Class A Common Stock of the Issuer."}],"balance_after":42924,"source":{"system":"sec-edgar","filing":"0001140361-20-020280","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036120020280/form4.xml","form_type":"4"}},{"id":3196544,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Stock Option","published_at":"2020-03-25T01:20:39.000Z","date":"2020-03-20","kind":"grant","acquired":true,"shares":5000,"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 immediately prior to the 2021 Annual Meeting of Stockholders of the Issuer, subject to continued service through the vesting date."}],"balance_after":5000,"derivative":{"exercise_price":22.07,"expiration_date":"2030-03-19","underlying":"Class A Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001140361-20-006755","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036120006755/form4.xml","form_type":"4"}},{"id":3199408,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Stock Option","published_at":"2020-03-20T20:30:43.000Z","date":"2020-03-18","kind":"exercise","acquired":false,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On March 18, 2020, the reporting person exercised previously issued stock options to purchase 20,000 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 12,500 shares on September 29, 2017 and the remaining 37,500 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date."}],"balance_after":30000,"derivative":{"exercise_price":3,"expiration_date":"2026-12-27","underlying":"Class A Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0001140361-20-006447","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036120006447/form4.xml","form_type":"4"}},{"id":3199407,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Class A Common Stock","published_at":"2020-03-20T20:30:43.000Z","date":"2020-03-18","kind":"exercise","acquired":true,"shares":20000,"price":3,"value":60000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On March 18, 2020, the reporting person exercised previously issued stock options to purchase 20,000 shares of Class A Common Stock of the Issuer."}],"balance_after":36924,"source":{"system":"sec-edgar","filing":"0001140361-20-006447","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000114036120006447/form4.xml","form_type":"4"}},{"id":3428289,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Class A Common Stock","published_at":"2019-08-28T00:42:45.000Z","date":"2019-08-23","kind":"disposition_to_issuer","acquired":false,"shares":2143,"price":13.195,"value":28276.885,"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":16924,"source":{"system":"sec-edgar","filing":"0001654954-19-010061","document":"section16.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000165495419010061/section16.xml","form_type":"4"}},{"id":3548749,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Stock Options","published_at":"2019-04-26T00:03:52.000Z","date":"2019-04-23","kind":"grant","acquired":true,"shares":20000,"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 5,000 shares on April 23, 2020 and the remaining 15,000 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":20000,"derivative":{"exercise_price":16.81,"expiration_date":"2029-04-22","underlying":"Class A Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0001654954-19-004824","document":"section16.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000165495419004824/section16.xml","form_type":"4"}},{"id":3880564,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Stock Option","published_at":"2018-06-29T20:35:33.000Z","date":"2018-06-28","kind":"exercise","acquired":false,"shares":16667,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On June 28, 2018, the reporting person exercised previously issued stock options to purchase 16,667 shares of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option was fully vested and exercisable."}],"balance_after":0,"derivative":{"exercise_price":3,"expiration_date":"2026-12-27","underlying":"Class A Common Stock","underlying_shares":16667},"source":{"system":"sec-edgar","filing":"0001654954-18-007186","document":"section16.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000165495418007186/section16.xml","form_type":"4"}},{"id":3880563,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":19496,"kind":"person","name":"Liu Tracy","position":1,"cik":"0001721299","reported_name":"Liu Tracy","relationship":{"director":true}}],"security":"Class A Common Stock","published_at":"2018-06-29T20:35:33.000Z","date":"2018-06-28","kind":"exercise","acquired":true,"shares":16667,"price":3,"value":50001.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On June 28, 2018, the reporting person exercised previously issued stock options to purchase 16,667 shares of Class A Common Stock of the Issuer."}],"balance_after":19067,"source":{"system":"sec-edgar","filing":"0001654954-18-007186","document":"section16.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1721299/000165495418007186/section16.xml","form_type":"4"}}]}