Quantitative Research

TWSE Foreign Holding Weekly (May 1st): TSMC, Macronix Intl, Wiwynn, Hon Hai Precision

01 May 2026 By Ke Yan, CFA, FRM
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Abstract: We analyzed changes in foreign holdings of TWSE stocks as of May 1st, with total foreign holdings at USD1,975.7bn across stocks with market cap of at least USD100m. We estimate net foreign flows were outflows of USD5,937m for the week, with total holdings declining USD21bn (1.0% WoW) while the TWSE index was flat (0.0% WoW). The largest outflow was TSMC (2330 TT) at -USD5,624m, followed by Wiwynn (6669 TT) at -USD288m and Unimicron Technology (3037 TT) at -USD218m. On the inflow side, Macronix Intl (2337 TT) led with +USD414m, followed by Hon Hai Precision (2317 TT) at +USD251m, King Yuan Electronics (2449 TT) at +USD234m, and Alchip Technologies (3661 TT) at +USD214m. We also tabulate league tables for top changes by value over 1W, 4W, and 1Y periods, as well as the top stocks held by foreign institutions.

TSMC (2330 TT) King Yuan Electronics (2449 TT) Macronix Intl (2337 TT) Hon Hai Precision (2317 TT) Wiwynn (6669 TT)

Highlighted Stocks

TSMC, King Yuan Electronics, Macronix Intl, Hon Hai Precision, Wiwynn

About TWSE Foreign Holding Weekly

A weekly review of foreign investor holdings in Taiwan-listed stocks. Each issue estimates the week's foreign inflow or outflow and tabulates the largest changes in foreign holdings by value over one week, four weeks and one year, alongside the stocks foreign institutions hold most. All issues of TWSE Foreign Holding Weekly →

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