Its is an Indian multinational steel-making company and a subsidiary of the Tata Group. It is one of the top steel producing companies globally and the second largest steel company in India.

It is an Indian state owned oil and gas company. It is the largest commercial enterprise in India. IOCL's business interests overlap the entire hydrocarbon value-chain, including refining, pipeline transportation, marketing of petroleum products, exploration and production of crude oil, natural gas and petrochemicals.

The Tata Power Company Limited is an Indian electric utility company and is part of the Tata Group. The core business of the company is to generate, transmit and distribute electricity.

Dredging Corporation of India Limited is a Miniratna Indian public sector unit engaged in the business of dredging. DCI does dredging for Indian seaports exclusively.

Lafarge is a French industrial company specialising in three major products: cement, construction aggregates, and concrete.

The Indian Coast Guard protects India's maritime interests and enforces maritime law, with jurisdiction over the territorial waters of India, including its contiguous zone and exclusive economic zone. It operates under the Indian Ministry of Defence.

Garden Reach Shipbuilders & Engineers Ltd., is one of India's leading shipyards, located in Kolkata, West Bengal. It builds and repairs commercial and naval vessels.

Tata Metaliks is a subsidiary of Tata Steel. It produces the finest quality of pig iron and ductile iron pipes in India.

The Port of Kolkata (Kolkata Port Trust) is a riverine port in the city of Kolkata, India. It is the oldest operating port in India, and was constructed by the British East India Company.