Zhongji Innolight, the world's biggest maker of optical modules, is planning to sell its shares on the Hong Kong stock market in a deal worth up to $8 billion, according to sources cited by Reuters on July 21, 2026. The shares could be priced as high as HK$1,010 each. If the deal reaches that size, it would be Hong Kong's largest stock market debut since Alibaba in 2019.

When a company sells its shares to the public for the first time, it's called an IPO, short for initial public offering. It's a way for a company to raise money from investors.

The projected size of this deal has gone up over the past five weeks. Reuters first reported on June 16 that the company was aiming for up to $7 billion, with the launch possible as early as mid-July. By July 17, Reuters said the company was "nearing" a listing at that same $7 billion level. The next day, Caixin Global confirmed that Zhongji Innolight had passed its Hong Kong listing hearing — a key step where exchange officials review and approve the company's application — for a roughly $7 billion IPO. Caixin reported it would potentially be the city's largest listing of 2026. The most recent Reuters figure, $8 billion, replaces those earlier estimates.

At $7 billion, Reuters noted on July 17, the IPO would be larger than Luxshare's listing. At $8 billion, the deal clears that bar by an even wider margin and becomes the biggest Hong Kong offering since Alibaba's 2019 listing.

The Hong Kong Stock Exchange's new listing page shows Zhongji Innolight's application documents, updated as of July 20, 2026. A detailed information pack — a document companies publish after passing their listing hearing, containing financial details and risks — was posted on the exchange's website with documents dated July 17, 2026. The directors named in the listing application include Dr. Liu Sheng, Mr. Wang Xiaodong, and Ms. Wang Xiaoli.

Reuters reported on July 21 that demand from AI data centres was cited as a reason behind the IPO. Optical modules are small components that convert electrical signals into light and back again inside data centre servers. Think of them as the translators that let fibre-optic cables carry information between machines. The rapid construction of AI systems has driven a surge in orders for these components. As the world's top optical module maker, Zhongji Innolight sits at the centre of that buying boom.

The deal size climbing from $7 billion to $8 billion in five days suggests either that early interest from big investors was stronger than expected, or that the company and its bankers see room to aim higher before the final price is set. The HK$1,010 per-share ceiling gives a reference point for the price range, though the final price will depend on how much demand there is when shares go on sale.

The bigger picture is that Hong Kong's stock market has been trying to rebuild its pipeline of new listings after several slow years. A deal of this size will be seen as a test of whether investors want exposure to Chinese AI infrastructure companies. Whether the final amount holds at $8 billion or comes in lower will depend on commitments from large investors and the public response. The paperwork filed so far signals that the regulatory process is nearly done. What remains uncertain is whether enough investors will buy in at the price the company is asking.