Zhongji Innolight made a lackluster debut after completing Hong Kong's largest listing since 2019, as investors calibrate their confidence in artificial-intelligence stocks. Shares of the optical transceiver maker declined 5.9% from their listing price to 922.00 Hong Kong dollars early Thursday, even after the Chinese company set the final offer price below the maximum. The company's Shenzhen-listed shares have plunged 20% so far this week.

Still, the Shandong-based company raised HK$53.41 billion in gross proceeds, equivalent to US$6.81 billion, making it the largest listing in the city since Alibaba's 2019 debut and Asia's second-largest this year, trailing only Chinese memory maker CXMT's Shanghai listing earlier this week. Its revenue in the first three months of 2026 almost tripled to $2.88 billion.

Zhongji Innolight is the result of a 2017 merger between Suzhou Innolight Technology, an optical module maker seeking new funding, and Shandong-based Zhongji Equipment, a washing machine motor maker with low margins. Optical transceivers play an increasingly important role in AI data centers, as they serve as the interface between electrical signals and optical signals, enabling data to travel over fiber-optic cables between servers with minimal latency amid surging computing demand.