CST Group Limited, an investment holding company, engages in the exploration, development, mining, processing, and sale of coal. It operates through four segments: Mining Business, Investment in Financial Instruments, Property Investment, and Money Lending. The company is involved in the securities investment; aircraft and vessel holding; and money lending businesses, as well as invests in and rents residential and commercial units.

It has operations in the People's Republic of China, Hong Kong, Canada, the United Kingdom, Singapore, and internationally. The company was formerly known as NetMind Financial Holdings Limited and changed its name to CST Group Limited in September 2017. CST Group Limited was founded in 1993 and is headquartered in Wan Chai, Hong Kong.

CST Group Limited operates as a subsidiary of Atlas Keen Ltd.