India's Nuclear Power Boom: Who Builds the Reactors?

India is intensifying its nuclear energy program to address the limitations of solar power in providing round-the-clock electricity, crucial for sectors like data centers. The Union Budget 2025-26 has earmarked Rs 20,000 crore for the Nuclear Energy Mission for Viksit Bharat, focusing on small modular reactors, with a goal of having at least five domestically produced reactors operational by 2033. The nation aims to increase its nuclear capacity significantly, from approximately 8,180 MW currently to 22,480 MW by 2031-32, with an ambitious target of 100 GW by 2047.

Two companies, MTAR Technologies and ISGEC Heavy Engineering, are at the forefront of supplying essential components for this nuclear expansion. MTAR Technologies, a specialist in precision-engineered parts for nuclear, space, and defense, has seen substantial institutional investment and impressive sales growth, though its valuation is currently very high. ISGEC Heavy Engineering, a more established player in heavy fabrication for power plants, has a robust order book but faces margin compression and slower sales growth, trading at a more moderate valuation.

The government is also facilitating private sector involvement by amending laws to allow more participation. The overall strategy involves leveraging domestic manufacturing capabilities for critical nuclear infrastructure, as importing these specialized components is not a viable option. While the policy direction and order pipeline appear strong, the investment in these companies hinges on their ability to execute flawlessly and manage their respective financial and valuation challenges.