The order has been classified as 'significant,' indicating a value in the range of Rs 1,000 crore to Rs 2,500 crore.

The project involves engineering, procurement, and construction of vibration-sensitive, high-precision civil infrastructure, along with manufacturing and installation of an ultra-high vacuum-compatible 8-km beam tube and critical vacuum equipment. The scope also includes integration of mechanical, electrical, HVAC, fire protection, vacuum control, and monitoring systems, along with support utilities.

The LIGO (Laser Interferometer Gravitational Wave Observatory) facility will be developed at Aundha in Hingoli district, Maharashtra, with a completion timeline of 48 months.

L&T is an Indian multinational engaged in EPC projects, hi-tech manufacturing, and services, operating across multiple geographies.

On a consolidated basis, L&T's net profit declined 4.27% year-on-year to Rs 3,215.11 crore in Q3 FY26, even as revenue from operations rose 10.48% to Rs 71,449.70 crore in Q3 FY26.

Shares of Larsen & Toubro fell 3.33% to Rs 4,270 on the BSE.