Why ASE Technology Holding Co., Ltd. (ASX) stock fell 11.9% intraday on Friday, October 30, 2026

ASE Technology Holding Co., Ltd. (ASX) traded at $39.26 as of 11:32 AM ET, down 11.87% on Friday, October 30, 2026, on volume of 3,972,029 shares (0.6× its 3-month average); market value about $86.70B.

ASX was among the stocks moving 5% or more in an earlier update that day; by the close it was no longer moving that much.

What happened: primary sources

Events Nexqual found for ASX on Friday, October 30, 2026 or the trading day before (October 29, 2026):

• Oct 29, 2026: SEC 6-K: Current report (foreign issuer), period ended Oct 29, 2026 source
• Oct 29, 2026: SEC 6-K: Current report (foreign issuer), period ended Oct 29, 2026 source
• Oct 30, 2026: One of 6 Semiconductors stocks among the day's biggest losers (TSEM, ASX, WOLF, SMTC, QCOM, ALAB), with no comparable group among the biggest gainers

These are listed as context. A filing or rating change on the same day is not proof that it caused the move; read the source.

More on ASX

ASX stock page: price, SEC financials, insider trades, superinvestor holders, analyst estimates and options. Other big moves that day: October 30, 2026.

Sources: SEC EDGAR, Nexqual Earnings Flash, analyst rating changes, Nexqual market data. Built November 4, 2026 at 11:35 UTC. Not investment advice.

Data source: Nexqual. Last updated: November 4, 2026 at 11:35 UTC. This page is informational and not investment advice.

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