Mackinnon Mackenzie and Co. was formed by William Mackinnon (1823-93) and Robert Mackenzie (1810-53). In 1856, Mackinnon Mackenzie and Co. secured East India Company's mail contract between Kolkata and Rangoon and founded the Calcutta and Burmah Steam Navigation Company Ltd, the forerunner to the British India Steam Navigation Company.
Mackinnon Mackenzie and Co. is made of yellowish-brown masonry and is located at the junction of Walchand Hirachand Marg and Shoorji Vallabhdas Road. The imposing building overlooks the entrance to Indira Docks (former Alexandra Docks). The main doorway is flanked by ornamental brackets supporting a capital with a marble statue placed on top.