ASE Technology · customer concentration
Who are ASE Technology’s biggest customers?
One customer (unnamed): more than 10%. *
Share of FY2025 revenue, not stated as a percentage.
Numbers, method and sources
FY2025
“One customer (including other customers for whom OEM services were provided on its behalf) accounted for more than 10.0% of our operating revenues in 2023, 2024, and 2025.”
Share of revenue per customer, as the filing states it. US GAAP requires disclosure only for customers with at least 10% of revenue; a year without a customer means below 10% or not disclosed. Labels like “Customer A” are the filer’s own; the same label is not guaranteed to be the same customer every year.
Source: the filing’s tagged data (XBRL ConcentrationRiskPercentage, benchmark revenue), or the filing text where a share is not tagged.
SEC filings only. No market data.