v3.26.1
DESCRIPTION OF BUSINESS
 6 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
DESCRIPTION OF BUSINESS DESCRIPTION OF BUSINESS
ACM Research, Inc. (“ACM” or “ACM Research”) and its subsidiaries (collectively with ACM, the “Company”) develop, manufacture and sell capital equipment to the global semiconductor industry.
The Company has direct or indirect interests in the following subsidiaries:
Effective interest held as at
SubsidiariesPlace and date of incorporation Principal Activities June 30,
2026		December 31,
2025
 ACM Research (Shanghai), Inc. ("ACM Shanghai")  Mainland China, May 2005  Principal operating subsidiary 73.2 %74.6 %
 ACM Research (Wuxi), Inc. ("ACM Wuxi")  Mainland China, July 2011  Sales and services 73.2 %74.6 %
 CleanChip Technologies Limited ("CleanChip")  Hong Kong, June 2017  Trading partner between ACM Shanghai and its customers 73.2 %74.6 %
 ACM Research Korea CO., LTD. ("ACM Korea")  Republic of Korea ("South Korea), December 2017  Sales, marketing, R&D, production 73.2 %74.6 %
 ACM Research ( Lingang), Inc. ("ACM Lingang")  Mainland China, March 2019  Management of production activities 73.2 %74.6 %
 ACM Research (CA), Inc. ("ACM California")  USA, April 2019  Procurement for ACM Shanghai 73.2 %74.6 %
 ACM Research (Cayman), Inc.  Cayman Islands, April 2019  Administrative function (inactive) 100.0 %100.0 %
 ACM Research (Singapore) PTE. Ltd. ("ACM Singapore")  Singapore, August 2021  Sales, marketing, business development 100.0 %100.0 %
 ACM Research (Beijing), Inc. ("ACM Beijing")  Mainland China, February 2022  Sales and services 73.2 %74.6 %
 Hanguk ACM CO., LTD  South Korea, March 2022  Sales, services, business development 100.0 %100.0 %
 Yusheng Micro Semiconductor (Shanghai) Co., Ltd.  Mainland China, June 2023  Component development and production 73.2 %74.6 %
 ACM-Wooil Microelectronics (Shanghai) Co., Ltd.  Mainland China, June 2023  Component development and production 53.6 %54.5 %
 ACM Research (Chengdu), Inc. ("ACM Chengdu")  Mainland China, December 2024  Sales and services 73.2 %74.6 %
Shengyi Micro Semiconductor (Shanghai) Co., Ltd.Mainland China, December 2024Business development62.2 %63.4 %

On February 6, 2026, ACM completed the sale of approximately 4.8 million shares of ACM Shanghai at a price of RMB160.00 per share (approximately $23.05 per share based on the exchange rate in effect on the date of the sale), generating approximately $110.2 million in gross proceeds and approximately $86.0 million net of taxes. On May 12, 2026, ACM Shanghai's employees exercised 2,431,900 options for shares of ACM Shanghai. Following the transactions, ACM’s ownership percentage in ACM Shanghai decreased from 73.6% as of March 31, 2026 to 73.2% as of June 30,
2026. On May 15, 2026, ACM completed the sale of approximately 2.9 million of its shares to certain investors at a price of $52.00 per share, generating approximately $148.4 million of proceeds, net of issuance costs.