Chinese optics firm Zhongji Innolight Co. has confidentially filed for a Hong Kong listing, according to people familiar with the development, in what could be one of the city’s biggest maiden share sales this year. Innolight — a supplier of Nvidia Corp. — is already listed in Shenzhen, where its shares have climbed about sixfold in a year as investors flock to artificial intelligence and businesses that feed it. The maker of high-speed optical transceivers said MondayBloomberg Terminal its 2025...