Frederick Ma Si-hang is a Hong Kong politician and administrator who was chairman of the MTR Corporation from 2015 to 2019.

MTR Corporation Limited is a majority government-owned public transport operator and property developer in Hong Kong which operates the Mass Transit Railway, the most popular public transport network in Hong Kong. It is listed on the Hong Kong Exchange and is a component of the Hang Seng Index. The MTR additionally invests in railways across different parts of the world, including franchised contracts to operate rapid transit systems in London, Stockholm, Beijing, Hangzhou, Taipa, Shenzhen, Sydney, and a suburban rail system in Melbourne.