TSMC, Micron, ASE, and SPIL continue to expand their advanced-node and OSAT investments, driving stronger first-half 2026 results for Taiwan’s fab engineering players — including UIS, MIC, L&K Engineering, YKE and Acter. Together, these five companies, which design and build the specialized facilities and infrastructure that chipmakers rely on, make up what the industry calls the “fab five.” With expanding reach into the US, ASEAN and Singapore, the “fab five” have maintained high order backlogs.