TSMC & Western Digital — Sandisk

TSMC: Fell up to 7.3% in Taipei; reported stronger profit but stock fell; announced $100B extra U.S. fab spending.

Western Digital — Sandisk: Fell up to 12.8% in a single session; still up over 500% year-to-date.

TSMC: TSMC's increased capex and chip production signal sustained AI demand, indirectly benefiting Western Digital — Sandisk by driving demand for memory chips.

Western Digital — Sandisk: Western Digital — Sandisk is the central entity, benefiting immensely from the AI memory shortage. Its stock has surged over 700% in 2026, with record revenue and margins, and it has secured multiyear supply agreements and a $6 billion buyback.

TSMC: TSMC will manufacture Meta's Iris chip, securing a major customer and reinforcing its position as a leading semiconductor foundry.

Western Digital — Sandisk: Western Digital — Sandisk will supply flash storage to Meta under a multi-year agreement, benefiting from Meta's infrastructure expansion.

TSMC: TSMC's stock gained, contributing to the rise in Taiwan's Taiex, reflecting the positive impact of the AI boom on major chipmakers.

Western Digital — Sandisk: Western Digital — Sandisk's stock was up more than 3% as part of the broader chipmaker rebound.

TSMC: TSMC's strong earnings received tepid market reaction, reflecting high expectations for the sector.

Western Digital — Sandisk: Chipmaker whose stock rose on Monday, leading gains.