Manufacturing & industry
Larsen & Toubro
Mumbai engineering group and one of ISRO's oldest industrial suppliers — booster segments, umbilical plates and tracking radar, and half of the HAL–L&T PSLV consortium.
Larsen & Toubro is a Mumbai engineering and construction group that has supplied hardware to India's space programme for more than five decades. Founded in Bombay in 1938 by the Danish engineers Henning Holck-Larsen and Søren Kristian Toubro and legally incorporated in 1946, it is India's largest private-sector defence manufacturer by revenue and reported ₹290,860 crore of revenue in FY2026 across engineering, infrastructure, information technology and financial services. Its space work sits inside the Precision Engineering and Systems business, whose revenue rose 41 per cent to ₹46.10 billion in the 2024 fiscal year, and is carried out mainly at the Powai aerospace works in Mumbai and the aerospace manufacturing facility at Coimbatore.
The company calls itself a long-term partner of ISRO that has been involved in every mission, naming Chandrayaan-1 and 2, Mangalyaan and Gaganyaan. For Chandrayaan-3 it manufactured and proof-pressure-tested the head end segment, middle segment and nozzle bucket flange of the launcher's solid boosters at Powai, and shipped ground and flight umbilical plates from Coimbatore. Its older contributions include the precision monopulse tracking radar used at Satish Dhawan Space Centre to acquire and track launch vehicles, the deep space network antenna at Bayalalu, and launch vehicle and satellite integration work at SHAR.
In November 2020 L&T handed ISRO the middle segment of the S200 solid booster for the human-rated GSLV Mk III that will fly Gaganyaan — a piece 3.2 metres in diameter, 8.5 metres long and weighing about 5.5 tonnes, built at the Powai Aerospace Manufacturing Facility and delivered ahead of schedule. J D Patil, then a whole-time director, said the company 'felt honoured to be trusted by ISRO in this extremely critical space program'.
On 5 September 2022 a consortium of L&T and Hindustan Aeronautics took an ₹860 crore contract from NewSpace India Limited to realise five PSLV-XL launch vehicles end to end over four years, working inside existing ISRO facilities under a government-owned, contractor-operated arrangement. L&T leads assembly at Coimbatore, where the first vehicle was put together without ISRO doing the build, and the consortium unveiled it in November 2025 for a flight carrying the Oceansat-3A Earth-observation satellite from Satish Dhawan Space Centre.
That flight keeps moving. A launch first expected in early 2025 was pushed to the middle of that year, then to early 2026, and as of 17 August 2026 it is expected in March 2027, with no official reason given by NewSpace India Limited, ISRO, HAL or L&T. A T Ramchandani, who heads L&T Precision Engineering and Systems, said in November 2025 that 'We have started delivering the PSLV hardware' and that 'We are hopeful that next year we will probably have 2 or 3 launches', adding that ISRO 'may end up doing another ten launches after these five'. Beyond launch vehicles the company builds equipment for ISRO's deep-space missions and has worked on Aditya-L1 and on Gaganyaan crew module and crew escape system development.
What they build and operate
- PSLV-XL (industry-built) · Launch vehicle · In development
Five PSLV-XL vehicles contracted to the HAL–L&T consortium for ₹860 crore; L&T assembles them at Coimbatore and the first is now expected to fly in March 2027.[6][7][10] - S200 booster segments · Component · Operational
Solid-booster segments for the human-rated GSLV Mk III; the middle segment delivered in November 2020 measured 3.2 m across and 8.5 m long and weighed about 5.5 tonnes.[5] - Launch-vehicle structures and ground hardware · Component · Operational
Ground and flight umbilical plates, deck panels, heat shields and rocket hardware built at Coimbatore and Powai for ISRO launches including Chandrayaan-3.[1][4][3] - Tracking and deep space network hardware · Component · Operational
Precision monopulse tracking radar at Satish Dhawan Space Centre and the deep space network antenna at Bayalalu, used to acquire and track launch vehicles and spacecraft.[1][3] - Gaganyaan hardware · Component · In development
Booster hardware for the human-rated launcher plus work on crew module and crew escape system development for India's human spaceflight programme.[5][4]
Milestones
- 1938
Founded in Bombay by the Danish engineers Henning Holck-Larsen and Søren Kristian Toubro; legally incorporated in 1946.[12] - November 2020
Delivered the middle segment of the S200 solid booster for the Gaganyaan launch vehicle from its Powai works, ahead of schedule.[5] - 05 September 2022
Won an ₹860 crore NewSpace India Limited contract with HAL for end-to-end realisation of five PSLV-XL vehicles over four years.[6] - July 2023
Supplied booster segments from Powai and umbilical plates from Coimbatore for the Chandrayaan-3 launch.[3][1] - 05 March 2025
Reported assembling India's first privately built PSLV at Coimbatore, with the launch pushed from early 2025 to the middle of the year.[7] - November 2025
Unveiled the first industry-built PSLV with HAL and said it had started delivering PSLV hardware.[8][9] - 17 August 2026
The consortium's first PSLV slipped to March 2027, with no official reason disclosed by NSIL, ISRO, HAL or L&T.[10]
Facilities
- Powai Aerospace Manufacturing Facility · Powai, Mumbai, Maharashtra, India
Manufactures and proof-pressure-tests solid-booster segments, including the S200 middle segment for the human-rated GSLV Mk III.[5][1] - Aerospace Manufacturing Facility, Coimbatore · Coimbatore, Tamil Nadu, India
Supplies ground and flight umbilical plates, heat shields and rocket hardware, and assembles the consortium's PSLV vehicles.[1][7][4]
Leadership
- S. N. Subrahmanyan
Chairman and Managing Director (as of 22 May 2026)[11][2] - A T Ramchandani
Senior Vice President and Head, L&T Precision Engineering and Systems (as of 20 November 2025)[8]
Sources
Larsen & ToubroChandrayaan-3larsentoubro.com
Larsen & ToubroS. N. Subrahmanyanlarsentoubro.com
Free Press JournalLarsen & Toubro Powers ISRO's Moon Mission Chandrayaan 3freepressjournal.in
Construction WorldL&T's Vital Role in Chandrayaan & ISRO's Future Missionsconstructionworld.in
Industrial Products FinderL&T delivers critical part of rocket booster S-200 for ISRO's Gaganyaan Missionipfonline.com
Indian Aerospace and Defence BulletinHAL-L&T Consortium Bags Rs 860 Crore PSLV Contractiadb.in
The AviationspaceL&T Expands Aerospace Operations Amid India's Growing Private Space Industryaviationspaceindia.com
Angel OneHAL–L&T Consortium Unveil First Industry-Built PSLV Rocketangelone.in
Indian Defence NewsFirst Private Sector Built PSLV Rocket Launches Soonindiandefensenews.in
IndianWeb2HAL-L&T's First PSLV Slips to March 2027indianweb2.com
Business Today₹120 crore salary: L&T chairman S N Subrahmanyan among India's top paid executives nowbusinesstoday.in
WikipediaLarsen & Toubroen.wikipedia.org
Coverage of Larsen & Toubro
Launch industry
Industry-built PSLV targets March 2027 launch
The reported date is at least nine months later than a Q1 2026 target disclosed to Parliament, although first-stage stacking began in December. No reviewed source gives a cause.
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