Larsen & Toubro Limited, also known as L&T is an Indian multi-national conglomerate headquartered in Mumbai, Maharashtra, India. It was founded by Danish engineers taking refuge in India, as well as an Indian financing partner.The company has business interests in engineering, construction, manufacturing goods, information technology, and financial services, and also has an office in the Middle-East and other parts of Asia.

L&T is India's largest engineering and construction company. Described by NDTV in 2013 as a "bellwether of India's engineering & construction sector",L&T was recognised as the Company of the Year in Economic Times 2010 awards.The sudden internment of German engineers in British India due to suspicions caused by the Second World War, who were to put up a soda ash plant for the Tata's, gave L&T a chance to enter the field of installation.