Diptech, a provider of large-scale artificial intelligence (AI) applications, saw its Hong Kong stock surge over 37% in the dark trading, currently trading at HK$37. Market sources revealed that Diptech's market subscription multiple exceeded 7,590 times, involving HK$272.1 billion and 239,000 subscriptions, making it the most oversubscribed stock in the history of the Hong Kong Stock Exchange's Main Board.