{"transactions":[{"id":979966,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2025-12-04T21:30:15.000Z","date":"2025-12-03","kind":"exercise","planned":true,"acquired":false,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The option is fully vested and exercisable."}],"balance_after":21165,"derivative":{"exercise_price":1.77,"expiration_date":"2028-01-24","underlying":"Class A Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0001140361-25-044360","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036125044360/form4.xml","form_type":"4"}},{"id":979965,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2025-12-04T21:30:15.000Z","date":"2025-12-02","kind":"exercise","planned":true,"acquired":false,"shares":100000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The option is fully vested and exercisable."}],"balance_after":41165,"derivative":{"exercise_price":1.77,"expiration_date":"2028-01-24","underlying":"Class A Common Stock","underlying_shares":100000},"source":{"system":"sec-edgar","filing":"0001140361-25-044360","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036125044360/form4.xml","form_type":"4"}},{"id":979964,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2025-12-04T21:30:15.000Z","date":"2025-12-03","kind":"sale","planned":true,"acquired":false,"shares":300,"price":33.57,"value":10071.0,"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 August 28, 2025."},{"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 $33.53 to $33.59, inclusive."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001140361-25-044360","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036125044360/form4.xml","form_type":"4"}},{"id":979963,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2025-12-04T21:30:15.000Z","date":"2025-12-03","kind":"sale","planned":true,"acquired":false,"shares":19700,"price":33.05,"value":651085.0,"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 August 28, 2025."},{"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 $32.51 to $33.48, inclusive."}],"balance_after":300,"source":{"system":"sec-edgar","filing":"0001140361-25-044360","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036125044360/form4.xml","form_type":"4"}},{"id":979962,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2025-12-04T21:30:15.000Z","date":"2025-12-03","kind":"exercise","planned":true,"acquired":true,"shares":20000,"price":1.77,"value":35400.0,"ownership":{"direct":true},"balance_after":20000,"source":{"system":"sec-edgar","filing":"0001140361-25-044360","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036125044360/form4.xml","form_type":"4"}},{"id":979961,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2025-12-04T21:30:15.000Z","date":"2025-12-02","kind":"sale","planned":true,"acquired":false,"shares":100000,"price":33.2,"value":3320000.0,"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 August 28, 2025."},{"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 $32.75 to $33.67, 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), and (4) to this Form 4."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001140361-25-044360","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036125044360/form4.xml","form_type":"4"}},{"id":979960,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2025-12-04T21:30:15.000Z","date":"2025-12-02","kind":"exercise","planned":true,"acquired":true,"shares":100000,"price":1.77,"value":177000.0,"ownership":{"direct":true},"balance_after":100000,"source":{"system":"sec-edgar","filing":"0001140361-25-044360","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036125044360/form4.xml","form_type":"4"}},{"id":1399877,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2024-09-24T20:30:25.000Z","date":"2024-09-21","kind":"grant","planned":false,"acquired":true,"shares":30000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On July 28, 2020, 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 September 21, 2024, the Issuer confirmed that certain of the performance criteria were met, resulting in vesting of the option as to 30,000 shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On July 28, 2020, 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 September 21, 2024, the Issuer confirmed that certain of the performance criteria were met, resulting in vesting of the option as to 30,000 shares."}],"balance_after":30000,"derivative":{"exercise_price":28.42,"expiration_date":"2030-07-27","underlying":"Class A Common Stock","underlying_shares":30000},"source":{"system":"sec-edgar","filing":"0001140361-24-041747","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036124041747/form4.xml","form_type":"4"}},{"id":1795995,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2023-08-25T21:46:47.000Z","date":"2023-08-23","kind":"exercise","planned":false,"acquired":false,"shares":8835,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The option was fully vested and exercisable."}],"balance_after":141165,"derivative":{"exercise_price":1.77,"expiration_date":"2028-01-24","underlying":"Class A Common Stock","underlying_shares":8835},"source":{"system":"sec-edgar","filing":"0001140361-23-041326","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123041326/form4.xml","form_type":"4"}},{"id":1795994,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2023-08-25T21:46:47.000Z","date":"2023-08-23","kind":"exercise","planned":false,"acquired":false,"shares":50001,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The option was fully vested and exercisable."}],"balance_after":0,"derivative":{"exercise_price":1,"expiration_date":"2026-12-27","underlying":"Class A Common Stock","underlying_shares":50001},"source":{"system":"sec-edgar","filing":"0001140361-23-041326","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123041326/form4.xml","form_type":"4"}},{"id":1795993,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2023-08-25T21:46:47.000Z","date":"2023-08-23","kind":"exercise","planned":false,"acquired":false,"shares":46164,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The option was fully vested and exercisable."}],"balance_after":0,"derivative":{"exercise_price":1,"expiration_date":"2026-12-27","underlying":"Class A Common Stock","underlying_shares":46164},"source":{"system":"sec-edgar","filing":"0001140361-23-041326","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123041326/form4.xml","form_type":"4"}},{"id":1795992,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-08-25T21:46:47.000Z","date":"2023-08-23","kind":"sale","planned":false,"acquired":false,"shares":105000,"price":15,"value":1575000.0,"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 $15.00 to $15.01, 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":0,"source":{"system":"sec-edgar","filing":"0001140361-23-041326","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123041326/form4.xml","form_type":"4"}},{"id":1795991,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-08-25T21:46:47.000Z","date":"2023-08-23","kind":"exercise","planned":false,"acquired":true,"shares":8835,"price":1.77,"value":15637.95,"ownership":{"direct":true},"balance_after":105000,"source":{"system":"sec-edgar","filing":"0001140361-23-041326","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123041326/form4.xml","form_type":"4"}},{"id":1795990,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2023-08-25T21:46:47.000Z","date":"2023-08-23","kind":"exercise","planned":false,"acquired":true,"shares":96165,"price":1,"value":96165.0,"ownership":{"direct":true},"balance_after":96165,"source":{"system":"sec-edgar","filing":"0001140361-23-041326","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123041326/form4.xml","form_type":"4"}},{"id":2015032,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2023-02-14T23:18:29.000Z","date":"2022-12-30","kind":"grant","acquired":true,"shares":3000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This Form 4 amendment has been filed solely to correct the number of derivative securities acquired, the amount of underlying securities, and the number of derivative securities beneficially owned following the reported transaction in connection with a previously issued stock option to purchase shares of Class A Common Stock of the Issuer reported in a Form 4 filed on January 4, 2023 (the \"Form 4\"). Such numbers were inadvertently stated as 13,500 in the Form 4. Such numbers should have been stated as 3,000 in the Form 4."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","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 30, 2022, the Issuer confirmed that certain of the performance criteria were met, resulting in vesting of the option as to 3,000 shares."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"This Form 4 amendment has been filed solely to correct the number of derivative securities acquired, the amount of underlying securities, and the number of derivative securities beneficially owned following the reported transaction in connection with a previously issued stock option to purchase shares of Class A Common Stock of the Issuer reported in a Form 4 filed on January 4, 2023 (the \"Form 4\"). Such numbers were inadvertently stated as 13,500 in the Form 4. Such numbers should have been stated as 3,000 in the Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"This Form 4 amendment has been filed solely to correct the number of derivative securities acquired, the amount of underlying securities, and the number of derivative securities beneficially owned following the reported transaction in connection with a previously issued stock option to purchase shares of Class A Common Stock of the Issuer reported in a Form 4 filed on January 4, 2023 (the \"Form 4\"). Such numbers were inadvertently stated as 13,500 in the Form 4. Such numbers should have been stated as 3,000 in the Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","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 30, 2022, the Issuer confirmed that certain of the performance criteria were met, resulting in vesting of the option as to 3,000 shares."}],"balance_after":3000,"derivative":{"exercise_price":25.45,"expiration_date":"2032-03-03","underlying":"Class A Common Stock","underlying_shares":3000},"source":{"system":"sec-edgar","filing":"0001140361-23-007064","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123007064/form4.xml","form_type":"4/A","original_submission_date":"2023-01-04"}},{"id":2065510,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2023-01-04T23:09:25.000Z","date":"2022-12-30","kind":"grant","acquired":true,"shares":13500,"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 30, 2022, the Issuer confirmed that certain of the performance criteria were met, resulting in vesting of the option as to 13,500 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 30, 2022, the Issuer confirmed that certain of the performance criteria were met, resulting in vesting of the option as to 13,500 shares."}],"balance_after":13500,"derivative":{"exercise_price":25.45,"expiration_date":"2032-03-03","underlying":"Class A Common Stock","underlying_shares":13500},"source":{"system":"sec-edgar","filing":"0001140361-23-000515","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123000515/form4.xml","form_type":"4"}},{"id":2567239,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2021-09-16T20:30:54.000Z","date":"2021-09-14","kind":"grant","acquired":true,"shares":10000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On July 28, 2020, the reporting person was granted an option to purchase 20,000 shares of Class A Common Stock of the Issuer. The option vests and becomes exercisable as to 10,000 shares upon the Issuer's receipt of its first demo tool order from a specified semiconductor company and as to the other 10,000 shares, upon the qualification of the Issuer's first demo tool for such semiconductor company. The performance criteria for the first 10,000 shares was met, resulting in vesting of the option as to 10,000 shares."}],"balance_after":10000,"derivative":{"exercise_price":85.27,"exercise_date":"2021-09-14","expiration_date":"2030-07-27","underlying":"Class A Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0001140361-21-031489","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036121031489/form4.xml","form_type":"4"}},{"id":2858217,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2021-02-16T22:52:46.000Z","date":"2021-02-12","kind":"exercise","acquired":false,"shares":30000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 12, 2021, the reporting person exercised a previously issued stock option to purchase 30,000 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":16667,"derivative":{"exercise_price":3,"expiration_date":"2026-12-27","underlying":"Class A Common Stock","underlying_shares":30000},"source":{"system":"sec-edgar","filing":"0001140361-21-005065","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036121005065/form4.xml","form_type":"4"}},{"id":2858216,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2021-02-16T22:52:46.000Z","date":"2021-02-12","kind":"sale","acquired":false,"shares":30000,"price":120,"value":3600000.0,"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."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001140361-21-005065","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036121005065/form4.xml","form_type":"4"}},{"id":2858215,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2021-02-16T22:52:46.000Z","date":"2021-02-12","kind":"exercise","acquired":true,"shares":30000,"price":3,"value":90000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 12, 2021, the reporting person exercised a previously issued stock option to purchase 30,000 shares of Class A Common Stock of the Issuer."}],"balance_after":30000,"source":{"system":"sec-edgar","filing":"0001140361-21-005065","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036121005065/form4.xml","form_type":"4"}},{"id":3400324,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2019-10-02T20:35:44.000Z","date":"2019-09-30","kind":"disposition_to_issuer","acquired":false,"shares":17946,"price":10.195,"value":182959.47,"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 Class A 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 date for the original Form 4 was August 23, 2019, the date of the closing of the underwriters' over-allotment option and therefore the date on which the obligations of the parties to the Equity Purchase Agreement became fixed and irrevocable. At the time of the filing of the original Form 4, it was contemplated that the reporting person would exercise his rights to purchase 17,946 shares of Class A Common Stock under an outstanding stock option agreement in order to satisfy his obligations under the Equity Purchase Agreement. 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 17,946 shares of Class A Common Stock under the outstanding stock option agreement. On September 30, 2019, such rights were cancelled in exchange for payment to the reporting person of $182,959.47 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 17,946 shares cancelled under the reporting person's stock option."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option vested and became exercisable as to 8,333 shares on March 1, 2017 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":15388,"derivative":{"exercise_price":3,"expiration_date":"2026-12-27","underlying":"Class A Common Stock","underlying_shares":17946},"source":{"system":"sec-edgar","filing":"0001654954-19-011374","document":"section16.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000165495419011374/section16.xml","form_type":"4/A","original_submission_date":"2019-08-27"}},{"id":3427811,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2019-08-28T00:40:27.000Z","date":"2019-08-23","kind":"disposition_to_issuer","acquired":false,"shares":17946,"price":13.195,"value":236797.47,"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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The reporting person did not own any outstanding shares of Class A Common Stock as of the transaction date. In order to meet his obligations under the Equity Purchase Agreement, the reporting person expects to exercise, effective as of the date on which he is obligated to sell 17,946 shares of Class A Common Stock to the Issuer under the Equity Purchase Agreement, outstanding options to acquire such 17,946 shares. The reporting person expects to file a subsequent Form 4 in connection with such option exercise."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001654954-19-010058","document":"section16.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000165495419010058/section16.xml","form_type":"4"}},{"id":3445345,"issuer":{"id":3926,"kind":"organization","name":"ACM Research, Inc.","symbol":"ACMR"},"owners":[{"id":72184,"kind":"person","name":"Chen Fuping","position":1,"cik":"0001729184","reported_name":"Chen Fuping","relationship":{"officer":true,"officer_title":"See remarks"}}],"security":"Stock Option","published_at":"2019-08-06T21:14:59.000Z","date":"2019-08-04","kind":"grant","acquired":true,"shares":10000,"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 2,500 shares on August 4, 2020 and the remaining 7,500 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":10000,"derivative":{"exercise_price":16,"expiration_date":"2029-08-03","underlying":"Class A Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0001654954-19-008925","document":"section16.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1680062/000165495419008925/section16.xml","form_type":"4"}}]}