Yangzhou Nanopore Innovative Materials Technology Ltd., a Chinese battery materials maker that supplies Tesla, has filed confidentially for an initial public offering in Hong Kong, according to people familiar with the matter. The listing could raise at least $200 million in what would be a significant test of investor appetite for electric vehicle supply chain companies.

The move comes as a wave of Chinese battery and materials firms seek public listings to capitalize on the booming EV industry. Nanopore produces advanced materials used in lithium-ion batteries, positioning the company at the center of the global shift toward electric vehicle adoption. Hong Kong has emerged as a favored destination for Chinese EV-related companies seeking international capital.

The offering would value Nanopore among a handful of battery materials producers that have gone public in recent years. The company's Tesla relationship adds prestige but also exposure to the automaker's own market challenges. Investors will be watching closely to see if the listing can attract the kind of valuations that similar battery material makers have achieved.