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 in the Company’s consolidated statements of comprehensive income. Other segment items within net income include interest income, interest expense, income from equity method investments and other (expense) income, net, which are each separately presented on the Company’s consolidated statements of comprehensive income. The measure of segment assets is reported on the 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 and are attributed to the geographic location in which the respective asset is located. Long-lived assets by geographic region as of the years ended were as follows:
December 31,
20252024
Long-lived assets by geography:
Mainland China $321,748 $287,892 
South Korea8,868 10,358 
United States9,465 8,973 
Total$340,081 $307,223 
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Historical Timeline

Fiscal YearFiled
2025Mar 2, 2026Showing above
2024Mar 3, 2025
2023Feb 28, 2024
2022Mar 2, 2023
2021Mar 1, 2022
2020Mar 1, 2021
2019Mar 24, 2020

About Segments Disclosures

Segment disclosures break a company into its reportable operating units, revealing revenue, profit, and asset allocation that consolidated financial statements obscure. Under ASC 280, segments must match how the chief operating decision maker views the business, providing a window into internal management structure and resource allocation priorities.

Key signals: compare segment margins to identify which units drive profitability and which destroy value. Watch for changes in the number of reportable segments — segment aggregation or disaggregation often coincides with strategic shifts or attempts to obscure declining performance. Intersegment elimination patterns reveal internal pricing practices. The reconciliation between segment totals and consolidated figures exposes corporate overhead allocation and unallocated items. Geographic revenue concentration highlights regulatory and currency exposure. Compare segment-level capital expenditure against segment revenue to assess where management is investing for future growth versus harvesting existing assets.