David H. Wang's Stock Option Vesting and Ownership in ACM Research, Inc.

The filing reports the vesting of stock options held by David H. Wang, the CEO, President, and Director of ACM Research, Inc. On October 27, 2025, 545,400 stock options vested, which were part of a larger grant of 1,636,197 options awarded on March 20, 2020. These options were granted based on the company's market capitalization milestones. The vested options are exercisable at a price of $7.36 per share and expire on March 19, 2030. Additionally, the filing details Wang's indirect ownership of Class A Common Stock through family trusts and relatives, totaling 945,840 shares. The filing is significant as it reflects the alignment of executive compensation with company performance and market valuation.