China’s third-largest chip foundry just filed for a Hong Kong listing. The real story is the $5 billion fab behind it.

Nexchip Semiconductor filed for a listing on the Hong Kong Stock Exchange on Tuesday, joining a stampede of Chinese chip companies turning to the city’s capital markets as Beijing pours resources into building a domestic semiconductor supply chain that can withstand American export controls. The Hefei-based foundry, China’s third largest behind SMIC and Hua Hong Semiconductor, is seeking a dual listing alongside its existing Shanghai shares, a move designed to tap international capital for what amounts to an industrial expansion of extraordinary scale.

The filing arrives just weeks after Nexchip completed full-process development of its 28nm logic platform, a milestone announced on 11 March that marks the company’s push into higher-value chipmaking. Until recently, Nexchip’s core capabilities sat at 55nm to 150nm, the sort of mature process nodes used in display drivers, power management chips, and image sensors. The 28nm breakthrough, while still far behind the ...