Zhongji Innolight Targets Up to HK$55 Billion in Hong Kong IPO for AI Optical Module Expansion

The offering would direct most proceeds toward R&D and high speed capacity, tying a potential record Hong Kong listing to the next buildout cycle in AI data center networks.

Zhongji Innolight began its Hong Kong public offering on July 22, seeking to raise as much as about HK$55 billion, or roughly US$7.1 billion, in what could become Hong Kong’s largest IPO of 2026 so far.

The Chinese optical transceiver supplier is offering 54.5 million H shares in the base deal at a maximum price of HK$1,010 each. The final offer price, completed subscription result and actual fundraising total have not been disclosed.

At the top end of the range, the transaction would rank as an unusually large equity raise for a component manufacturer. It also places a public financing marker on the supply chain behind AI data centers, where network upgrades are becoming as important as the availability of AI accelerators.

Zhongji Innolight makes optical modules that convert electrical signals from servers and switches into optical signals transmitted over fiber. Its principal products include 400G, 800G and 1.6T modules, with 400G-and-above products accounting for 94.6% of revenue in the first quarter of 2026, according to its Hong Kong prospectus.

The company plans to allocate about 35% of net IPO proceeds to research and development and 30% to capacity expansion. More than 80% of the planned expansion spending is earmarked for 1.6T and higher speed products. It aims to increase annual capacity from about 40 million units in 2026 to about 90 million units by 2029.

Another 10% of net proceeds, or roughly HK$5.45 billion if priced at the maximum, is intended to strengthen supply chain resilience and commercial capabilities.

That allocation matters because optical module makers must often commit cash before customers complete procurement. Zhongji Innolight said it typically buys key materials and begins production ahead of scheduled customer deliveries. At the end of May, its inventory had risen to RMB19.43 billion from RMB15.67 billion at the end of March, while cash declined to RMB6.85 billion from RMB12.18 billion over the same period.

The working-capital shift reflects both demand and execution risk. The company said 45.4% of inventory that remained unsold at the end of March had been used or sold by May 31, while 80.1% of trade receivables outstanding at the end of March had been settled by that date. Still, its large customers generally do not make long-term purchase commitments and can adjust volumes, specifications or project timing.

For global buyers, the planned capacity increase could help ease availability constraints for leading-edge modules if AI infrastructure spending remains strong. But it also concentrates Zhongji Innolight’s manufacturing bet on a narrow set of high-speed products whose volume ramps depend on cloud operators, AI platform companies and switch makers completing validation cycles.

Customer concentration is a central commercial consideration. Zhongji Innolight’s five largest customers generated 81.9% of first-quarter revenue in 2026. Its largest supplier represented 38.3% of purchases, while the top five suppliers accounted for 52.4%. The IPO proceeds would give the company more balance-sheet capacity to reserve materials and production resources, but they do not remove the exposure to a small number of customer purchasing decisions and upstream component sources.

The company’s recent financial performance illustrates why investors are focused on the offering. Zhongji Innolight reported RMB38.24 billion in revenue and RMB10.797 billion in net profit attributable to shareholders in 2025. In the first quarter of 2026, revenue reached RMB19.496 billion and attributable net profit was RMB5.735 billion. Its gross margin rose to 45.5% in the quarter, from 31.6% in 2023.

Zhongji Innolight has attributed margin improvement to a greater contribution from high-speed products, continued penetration of newer products, improved yields and better production efficiency. Its 1.6T modules entered mass production in 2025, placing the company’s newest product ramp alongside the recent rise in average selling prices and margins.

The Hong Kong listing is therefore not simply a secondary-market financing event. It gives an already profitable A-share supplier a substantial pool of capital to fund the transition from 800G and 1.6T deployment to the next generation of data center interconnects, including 3.2T products under development.

Whether the deal ultimately becomes Hong Kong’s largest IPO of the year remains uncertain until the offer closes and other 2026 listings are measured against its final proceeds. The more immediate signal is clear: Zhongji Innolight is using public capital to expand ahead of customer demand, taking on inventory and validation timing risk in pursuit of a larger role in the AI networking supply chain.