ACM Research sells 4.8M shares of subsidiary ACM Shanghai at RMB 160/share, lowering stake from 74.84% to 73.72%

ACM Research, Inc.

Complete sale of 4,801,648 shares of ACM Shanghai (688082) at RMB 160.00 (~$23.05) per share via inquiry-based transfer on SSE.
Aggregate ownership in ACM Shanghai declines from 74.84% to 73.72%; no change in control.
Transfer price determined via inquiry with 38 institutional investors; 30 transferees include fund managers and QFIIs.
Prior reductions by HUI WANG and Jian Wang in Nov 2025; combined concert-party stake now 73.72%.
All transferred shares subject to 6-month lock-up period.

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