Quantitative Research

TWSE Foreign Holding Weekly (Sep 4th): Nanya Technology, Wiwynn, Winbond Electronics

04 Sep 2026 By Ke Yan, CFA
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Abstract: We analyzed the changes in foreign holdings of TWSE stocks as of Sep 4th, with total foreign holdings standing at USD2,271bn across stocks with a market cap of at least USD100m. We estimate net foreign outflows of USD1,773m for the week, as foreign holdings decreased by USD7bn (0.3% WoW) while the TWSE index rose 0.5%. On the outflow side, Nanya Technology saw the largest weekly foreign selling at USD982m, followed by Wiwynn at USD557m and Winbond Electronics at USD308m. On the inflow side, Unimicron Technology led with USD295m in weekly foreign buying, followed by Quanta Computer at USD256m and Asustek Computer at USD212m.

Wiwynn (6669 TT) Quanta Computer (2382 TT) Nanya Technology (2408 TT) Unimicron Technology (3037 TT) Winbond Electronics (2344 TT)

Highlighted Stocks

Wiwynn, Quanta Computer, Nanya Technology, Unimicron Technology, Winbond Electronics

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