Mazagon Dock Shipbuilders

The company's shipyards were established in the 18th century. Ownership of the yards passed through entities including the Peninsular and Oriental Steam Navigation Company and the British-India Steam Navigation Company. Eventually, 'Mazagon Dock Limited' was registered as a public company in 1934.

The shipyard was nationalised in 1960 and is now a public sector undertaking (PSU) of the Government of India. In 2024, it became India's 18th PSU to receive the Navratna status from the Indian government.

Captain Jagmohan, IN (Retd), is the Chairman & Managing Director (CMD) of Mazagon Dock Shipbuilders Limited. The retired naval officer took over his current position on 21 April 2025. He will lead the company until his retirement on 30 September 2029. The former Navy captain has earlier served as the Director, Corporate Planning, Projects and Business Development at Goa Shipyard Limited.

As of April 2025, Mazagon Dock Shipbuilders Limited is negotiating to acquire a majority stake of Colombo Dockyard PLC (CDPLC). MDL will reportedly purchase 51% stakes from Japan's Onomichi Dockyard Co. Ltd. after the continuous losses from CDPLC. A memorandum of understanding (MoU) is expected by the end of the month. The acquisition worth ₹249.5 crore (US$26 million) was completed by April 2026. The board of Colombo Shipyard has already been re-constituted with MDL members with effect from 7 April with the CMD, MDL being appointed as the Non-Executive Chairman.

The dockyard was originally established 1774 while it was acquired by the Government of India in 1960 and celebrated its 250th anniversary in 2024. As of date, the yard has built 806 platforms overall including 31 capital warships and eight submarines along with an export record of 243 vessels to international clients. The shipyard will also expected to play a major role in the Indian Navy's goal to reach a size of 175 Capital Ships with 100% indigenisation within 2047.

MDL builds offshore oil drilling platforms. It operates facilities at Alcock, Mumbai, and Nhava Yard for the construction of platforms with wellhead, water injection and production separator and glycol process capabilities, as well as jackup rigs, SBMs and other offshore structures.

Repair and maintenance jobs on offshore rigs are undertaken at Alcock; jackets up to 80 metres (260 ft) length and 2,200-tonne weight can be constructed. At Nhava, jackets up to 80 metres (260 ft) length and 2,300-tonne weight, main decks up to 550-tonne weight, and helipads of 160-tonne weight can be constructed.

The yard builds specialist vessels able to clean oil spills and fight fires on offshore drilling platforms.

A welding training school develops and maintains welding techniques and procedures.

The Mazagon Dock Shipbuilders, in its regulatory filing on 27 June 2025, announced its decision of acquisition of a controlling (51%) stake in Sri Lankan peer Colombo Dockyard in a deal worth up to ₹450 crore (equivalent to ₹465 crore or US$48 million in 2026) in order to grow its shipbuilding and repair business.The transaction will be completed within six months following which the Sri Lankan shipbuilder will become a part of Mazagon Dock Shipbuilders. At the end of November 2024, Japan's Onomichi Dockyard exited its majority stake in Colombo Dockyard. Following this, Colombo reportedly sought New Delhi's assistance in encouraging Indian investment to avoid default. Mazagon Dock Shipbuilders Ltd was subsequently shortlisted due to its shipbuilding experience and financial capability.