SEGMENT INFORMATION

6 Months Ended

Jun. 30, 2026

Segment Reporting [Abstract]

SEGMENT INFORMATION

SEGMENT INFORMATION

The Company identifies operating segments according to how the business activities are managed and evaluated. The Company’s chief operating decision maker (“CODM”) has been identified as ACM’s Chief Executive Officer. The Company's operating segments include ACM Research and ACM Shanghai. As the Company is engaged in the development, manufacture and sale of capital equipment to global semiconductor manufacturers, and each of the operating segments share similar economic and other qualitative characteristics, the results of the Company’s operating segments are aggregated into one reportable segment.

The CODM assesses financial performance for the Company and decides how to allocate resources based on consolidated revenue, gross margin and income from operations. The CODM considers forecasts and actual results on a regular basis when assessing the operating results and making resource decisions.

Significant expenses within income from operations, as well as within net income, include consolidated cost of revenue, sales and marketing, research and development, and general and administrative, and which are each separately presented on the Company’s condensed consolidated statements of comprehensive income. Other segment items within net income include interest income, interest expense, income from equity method investments and other expense, net, which are each

separately presented on the Company’s condensed consolidated statements of comprehensive income. The measure of segment assets is reported on the Company’s condensed consolidated balance sheets as total assets.

Revenue by geographic location is determined by the location of customers’ facilities to which products were shipped. Long-lived assets consist primarily of property, plant and equipment, and right-of-use assets are attributed to the geographic location in which they are located.

Long-lived assets by geographic region were as follows:

	June 30, 2026		December 31, 2025
Long-lived assets by geography:
Mainland China	$	389,842	$	321,748
South Korea	6,783		8,868
United States	12,682		9,465
Total	$	409,307	$	340,081