MTR Corporation Limited is a company listed on the Hong Kong Exchange (SEHK: 0066) and Hang Seng Index. MTR runs the Hong Kong MTR metro system, and is also a major property developer and landlord in Hong Kong. It also invests in railways in different parts in the world, and has obtained contracts to operate rapid-transit systems in London, Stockholm, Beijing, Shenzhen, and Melbourne.

The Mass Transit Railway Corporation (Chinese: 地下鐵路公司) was established in 1975 as a government-owned statutory corporation so as to look over the initial construction of the Hong Kong Mass Transport System. Later, it operates and manages the functioning transport system. On 30 June 2000 the MTRC was succeeded by the MTR Corporation Limited (MTRCL, Chinese: 地鐵有限公司). As with the MTRC, the MTRCL's principal business is to operate the mass transit railway system. Following a successful initial public offering, the MTRCL was listed on the Hong Kong Stock Exchange on 5 October 2000, however the government is still the major stakeholder in the MTRCL.