Form 4 Filing for Liu Tracy

This filing details transactions made by Liu Tracy, a director at ACM Research, Inc. On August 12, 2026, Liu Tracy acquired 6,400 Stock Options and 728 Restricted Stock Units (RSUs). The stock options have an exercise price of $81.26 and will vest by the 2027 annual meeting, subject to continued service. The RSUs were granted at a price based on the average closing market price over the preceding 30 trading days and are set to vest by the 2027 annual meeting, also contingent on continued service. Both the stock options and RSUs represent direct ownership and are tied to the underlying Class A Common Stock of ACM Research, Inc. (ACMR).