Simplex Infrastructures Limited provides construction services for the transport, energy and power, mining, buildings, marine, and real estate sectors in India and internationally. It operates through two segments, Construction and Others. The company builds rail infrastructure, including rail tracks, station buildings, bridges, and culverts; and designs and constructs high-rise infrastructure, such as multistoried residential towers, institutional or information technology buildings, hotels, hospitals, and mass housing projects. It also builds industrial structures comprising steel and power plants; and undertakes projects for cement, aluminum, copper, engineering, automobiles, petrochemicals, fertilizers, paper textiles, pharmaceuticals, chemicals, and other industrial plants. In addition, the company engages in erecting various types of power infrastructures that include thermal, hydel, and nuclear, as well as ultra-mega power projects; underwater piling, which comprise steel piling; and building bridges across rivers. Further, it undertakes ground engineering projects, including pre-cast piling and jointed piling, cast-in-situ, driven, and bored piling, as well as soil investigation, soil compaction, diaphragm walls, grouting, stone columns, etc. Additionally, the company offers airport renovation and modernization; and oil drilling services, as well as engages in the real estate, and plant and equipment hire business activities. It also operates and develops mines. Simplex Infrastructures Limited was founded in 1924 and is based in Kolkata, India. The ISIN of this stock is INE059B01024.