{"transactions":[{"id":3927419,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":166552,"kind":"person","name":"Chen Fufa","position":1,"cik":"0001721376","reported_name":"Chen Fufa","relationship":{"officer":true,"officer_title":"See Remarks"}}],"security":"Stock Option","published_at":"2018-05-17T20:36:24.000Z","date":"2018-01-31","kind":"exercise","acquired":false,"shares":22915,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On January 31, 2018, the reporting person exercised previously issued stock options to purchase 22,915 shares of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The option vested and became exercisable as to 8,333 shares on May 1, 2016 and the remaining 25,001 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date."}],"balance_after":10419,"derivative":{"exercise_price":1.5,"expiration_date":"2025-05-01","underlying":"Class A Common Stock","underlying_shares":22915},"source":{"system":"sec-edgar","filing":"0001654954-18-005607","document":"section16.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000165495418005607/section16.xml","form_type":"4"}},{"id":3927418,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":166552,"kind":"person","name":"Chen Fufa","position":1,"cik":"0001721376","reported_name":"Chen Fufa","relationship":{"officer":true,"officer_title":"See Remarks"}}],"security":"Stock Option","published_at":"2018-05-17T20:36:24.000Z","date":"2018-01-31","kind":"exercise","acquired":false,"shares":33334,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On January 31, 2018, the reporting person exercised previously issued stock options to purchase 33,334 shares of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The option was fully vested and exercisable."}],"balance_after":0,"derivative":{"exercise_price":0.75,"expiration_date":"2021-05-01","underlying":"Class A Common Stock","underlying_shares":33334},"source":{"system":"sec-edgar","filing":"0001654954-18-005607","document":"section16.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000165495418005607/section16.xml","form_type":"4"}},{"id":3927417,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":166552,"kind":"person","name":"Chen Fufa","position":1,"cik":"0001721376","reported_name":"Chen Fufa","relationship":{"officer":true,"officer_title":"See Remarks"}}],"security":"Class A Common Stock","published_at":"2018-05-17T20:36:24.000Z","date":"2018-01-31","kind":"exercise","acquired":true,"shares":22915,"price":1.5,"value":34372.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On January 31, 2018, the reporting person exercised previously issued stock options to purchase 22,915 shares of Class A Common Stock of the Issuer."}],"balance_after":129583,"source":{"system":"sec-edgar","filing":"0001654954-18-005607","document":"section16.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000165495418005607/section16.xml","form_type":"4"}},{"id":3927416,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":166552,"kind":"person","name":"Chen Fufa","position":1,"cik":"0001721376","reported_name":"Chen Fufa","relationship":{"officer":true,"officer_title":"See Remarks"}}],"security":"Class A Common Stock","published_at":"2018-05-17T20:36:24.000Z","date":"2018-01-31","kind":"exercise","acquired":true,"shares":33334,"price":0.75,"value":25000.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On January 31, 2018, the reporting person exercised previously issued stock options to purchase 33,334 shares of Class A Common Stock of the Issuer."}],"balance_after":106668,"source":{"system":"sec-edgar","filing":"0001654954-18-005607","document":"section16.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000165495418005607/section16.xml","form_type":"4"}}]}