Top Nuclear Power Stocks For September 2026

Oil markets have been whipsawed by the Iran war, energy prices and inflation sit under the microscope, and policymakers keep warning that power security is not a theoretical issue anymore. That backdrop pulls steady nuclear power from a niche talking point into a serious portfolio theme. If you care about long term electricity demand and resilient supply, this matters. This article walks through three nuclear focused stocks that capture that story.

The three stocks below are a sample starting point, while the full nuclear energy screen surfaced 34 more companies with equally detailed stories that are not covered here.

If you want to identify potential ideas tailored to your own risk profile and time horizon, head straight into the Nuclear Energy Stocks screener to filter, analyze, and focus on the highest conviction nuclear opportunities.

NuScale Power (SMR)

Overview: NuScale Power develops small modular reactor technology, selling its 77 MWe NuScale Power Module along with full plant lifecycle services.

Operations: The business currently reports about $11 million of revenue from electric utility related services, all generated within the United States.

Market Cap: US$3.8 billion

NuScale Power operates at the forefront of the nuclear energy theme, offering a compact reactor together with the licensing and services package that grid operators use in practice.

"NuScale's involvement in the RoPower 6-module small modular reactor (SMR) power plant in Romania indicates future meaningful revenue and cash flow through its partnership in the Fluor-led Front-End Engineering and Design (FEED) Phase 2."

The trajectory of NuScale’s long term earnings profile depends heavily on how one unresolved commercial trigger develops from here.

That pivot hinges on one key inflection. Read the full narrative for NuScale Power to see how NuScale Power’s Romania project and contract pipeline could reshape the risk reward profile.

Constellation Energy (CEG)

Overview: Constellation Energy produces and sells electricity, natural gas and clean power solutions in the United States, anchored by a large nuclear generation fleet.

Operations: Constellation Energy reports US$31.3b of revenue from its Generation segment, with sales spread across Midwest, Mid Atlantic, New York, ERCOT and other US power regions.

Market Cap: US$92.9b

Constellation Energy matters in this nuclear screen because its reactors supply a meaningful chunk of dependable, low carbon baseload power that large buyers increasingly want locked in for years.

"Growing demand for carbon free, reliable power from large scale customers such as data centers and large corporates is now translating into roughly 920 MW of long duration nuclear power contracts with investment grade buyers on an average 18.5 year term, which can support more visible revenue and earnings growth for Constellation Energy as additional load is signed over time."

What happens to Constellation Energy’s nuclear driven earnings profile depends heavily on how one evolving policy support pillar holds up from here.

If that policy support really holds, read the full narrative for Constellation Energy to see how Constellation Energy’s contract mix could accelerate or stall its nuclear earnings story.

Oklo (OKLO)

Overview: Oklo develops Aurora Powerhouse small modular fission reactors and related nuclear fuel recycling technologies to supply grid scale electricity.

Market Cap: US$7.5b

Oklo matters for this nuclear energy screen because it is trying to pair compact reactors with long term power contracts for energy hungry customers.

"Oklo has already signed major agreements, e.g. with Switch for 12 GW through to 2044."

What really shifts Oklo’s long term outcome is the way one capital heavy hurdle affects the timing and economics of its first operating units.

That capital hurdle is the real swing factor, so read the full narrative for Oklo to see how Oklo’s contracts and costs could accelerate or stall the story.

Seeking Alternatives Before The Crowd

Fresh themes are breaking out, capital is flying to early movers, and some opportunities may be caught and priced in quickly. Scan what others miss while it matters and consider taking action early.

• Look for potential turnaround stories before momentum headlines hit the feeds by scanning the curated 29 high quality undervalued stocks that still sit under the radar for now.
• Follow structural demand for electrification and infrastructure upgrades by tracking the hand picked 40 power grid technology and infrastructure stocks that could be positioned to respond if spending continues.
• Examine pricing dynamics in future focused materials by reviewing the focused 36 best rare earth metal stocks before attention concentrates on a limited set of tickers.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.

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