Allan Zeman, known by many as Mr Lan Kwai Fong for his role in establishing the entertainment district, could personally raise as much as HK$591.15 million from the flotation of ColbyNet.
ColbyNet was set up in February to control a global merchandise-sourcing group founded by Mr Zeman in 1975.
The firm is expected to list on the main board on April 18.
ColbyNet plans to raise up to HK$2.65 billion to help finance its bid to transform itself into an Internet business.
It plans to spend about HK$155 million to build an Internet-based business-to-business sourcing platform, using e-commerce solutions provided by US-based Scient and Commerce One.
If the company can sell 1.01 billion shares at the top end of the indicative price range of between HK$2.68 and HK$3.88, the flotation would give it a market capitalisation of HK$15.53 billion.