India Just Opened Nuclear Power to Private Companies — These 6 Stocks Are Already Positioned

India Just Opened Nuclear Power to Private Companies — These 6 Stocks Are Already Positioned

India's nuclear energy sector crossed a historic threshold this week. The government notified draft rules under the SHANTI Act (Safe and Harmonised Approach to Nuclear Technologies in India), setting safety norms for private operators and allowing up to 49% foreign direct investment in the sector. Until now, nuclear power in India has been the exclusive domain of the state-owned Nuclear Power Corporation of India (NPCIL). That is about to change — and the companies that have quietly built nuclear capabilities over the past decade are first in line.

We searched corporate filings on Xaro to find which NSE-listed companies have real nuclear exposure backed by contracts, equipment, and disclosed revenue — not just analyst speculation.

The Numbers Behind India's Nuclear Push

India currently has about 8.1 GW of operable nuclear capacity across 23-24 reactors. The government's target: 100 GW by 2047. That is a 12x increase requiring an estimated ₹2.1 lakh crore ($26 billion) in private EPC participation, per HCC's Q4 FY26 analyst presentation. The Union Budget 2026-27 allocated ₹24,123 crore to the Department of Atomic Energy and extended customs duty exemptions for nuclear power project imports until 2035, per Tata Power's FY26 annual report.

1. Hindustan Construction Company (HCC) — The Builder With 60% Market Share

HCC has constructed 60% of India's installed nuclear power generation capacity, per every quarterly result filing since FY23. Their Q4 FY26 investor presentation explicitly references the SHANTI mission, noting it "allows 49% FDI" and the government plans to "invite $26 bn (~₹2.1 lakh Cr) private EPC participation." HCC's expertise spans reactor buildings, auxiliary buildings, spent fuel buildings, and water intake systems. As of Q1 FY27, HCC reported consolidated revenue of ₹993 crore with ₹51 crore PAT. Their Nuclear & Special Water segment held ₹3,082 crore in orders as of Q3 FY24. With L1 bids worth ₹1,671 crore pending as of August 2026, the nuclear order pipeline could accelerate materially under the new rules.

2. NTPC — The State Giant Going Nuclear

NTPC is not waiting for the rules to be finalised. Per their FY26 annual report (published August 4, 2026), NTPC targets 30 GW of nuclear capacity as its contribution to India's 100 GW goal. They have already created two nuclear entities: ASHVINI, a joint venture with NPCIL advancing the Mahi Banswara Rajasthan Atomic Power Project (4 × 700 MW = 2,800 MW), and NTPC Parmanu Urja Nigam Limited (NPUNL), incorporated in January 2025 as a wholly owned subsidiary "for undertaking Nuclear Energy Business," per their Q3 FY25 earnings transcript. NPUNL is evaluating more than 30 sites for future reactors. NTPC's revised corporate plan envisions ₹17 lakh crore in total group capex through FY37, with a "major shift towards nuclear power" from FY33 onward.

3. KSB Limited — The Only Company With Every Nuclear Pump

KSB has supplied reactor coolant pumps to Indian nuclear plants since 1979, starting with the Narora-2 reactor. Per their August 2025 investor presentation, KSB's nuclear order book stood at ₹1,313 crore as of June 2025, up from ₹969 crore in December 2023 — a 35% increase in 18 months. Management stated in their March 2026 earnings call: "We are one company which has all the pumps required in a nuclear power plant." They are supplying primary coolant pumps for the Kaiga 5&6 reactors and have entered the nuclear pump export market with eight Critical Safety Class 2 pumps for a new overseas nuclear plant. As India scales from 8 GW to 100 GW, every new reactor needs KSB's full pump suite.

4. MTAR Technologies — 16 Years Inside the Reactor

MTAR Technologies has a 16-plus year relationship with NPCIL, manufacturing some of the most critical components inside Indian reactors: fuelling machine heads, coolant channel assemblies, fuel transfer systems, and fuel locator assemblies, per their FY23 annual report. Their products go into Kaiga and GHAVP reactor projects. Per their Q1 FY27 investor presentation, MTAR's total order book reached ₹2,896 crore with ₹5,143 crore in incoming orders. As nuclear capacity scales, MTAR's deep accreditation with NPCIL creates a significant barrier to entry for competitors.

5. Unimech Aerospace — The New Entrant Winning Nuclear Orders

Unimech entered the nuclear segment in 2020 with one subsystem and has scaled rapidly. Per their FY26 investor presentation, the company has won ₹866 million (₹86.6 crore) in nuclear orders. Management disclosed in their June 2025 earnings call that they have applied for approximately ₹800 crore in cumulative nuclear tenders, targeting ₹200-400 crore in wins. Their stated vision: "to participate in the major reactor programs that are coming up... the 11 reactors." Unimech is positioning itself for electromechanical subsystems across upcoming nuclear projects.

6. Tata Power — Large-Cap Exposure With a Regulatory Head Start

Tata Power's CEO discussed nuclear ambitions in the company's February 2025 earnings call, noting the "very stringent requirement of getting approval not only from the forest and the environment aspect, but also from the Atomic Energy Regulatory Board." The SHANTI Act draft rules directly address this regulatory bottleneck by establishing clear safety norms for private operators. Tata Power's FY26 annual report highlights the government's extended customs duty exemption for nuclear project imports until 2035 and the ₹24,123 crore DAE allocation — both signals that the fiscal framework is ready for private participation.

What Retail Investors Should Do

The SHANTI Act is a framework, not yet a finished law. Draft rules are open for comment and the final regulations may take months. Revenue impact for most of these companies is a FY28-FY30 story at the earliest. But the filing evidence is clear: HCC, KSB, and MTAR have spent years building nuclear capabilities that cannot be replicated quickly. NTPC is already deploying capital. The gap between "India announces nuclear ambition" and "companies with actual nuclear contracts" is where informed investors have an edge. Watch for: tender announcements from NPCIL/NPUNL, the final SHANTI Act notification, and quarterly order book updates from these six companies.

Data sourced from company filings on NSE via Xaro.