3 Canadian Nuclear Stocks To Own In September 2026

Oil prices have extended gains as worries about Middle East supply keep energy security on every front page. When fuel markets look fragile, steady baseload power from nuclear energy moves higher on investor watchlists. For Canadians who want exposure to that theme, a focused basket of domestic nuclear energy stocks offers a clear starting point. This article breaks down three of the strongest candidates from that group.

The stocks covered next are only a small sample of what nuclear energy has to offer, and the full screen surfaced another 57 companies with equally compelling narratives that are not covered here. If you want to move beyond this starter list and thoroughly pressure test your own ideas, head straight into the Nuclear Energy Stocks screener to identify, filter, and analyze the highest conviction nuclear opportunities that match your criteria.

Aecon Group (TSX:ARE)

Overview: Aecon Group is a Toronto based construction and infrastructure contractor whose portfolio includes nuclear power civil works, transportation, utilities, and industrial projects.

Operations: Aecon generates about CA$6.0b in revenue, with roughly CA$6.0b from Construction and CA$8 million from Concessions.

Market Cap: CA$3.5b

Aecon Group matters for this nuclear energy screen because its heavy civil expertise is hired directly into reactor refurbishments and life extension projects, turning long term energy policy into shovel ready infrastructure work.

"Aecon's growing expertise and market position in nuclear and power transmission, alongside successful project delivery and potential for additional wins in both the Canadian and U.S. markets, positions the company to capture outsized share of secular industry growth, boosting long-term revenue and profitability."

What really moves the needle for Aecon from here is how one pressure on future margins interacts with that expanding nuclear project backlog.

That margin question is the heart of the story, and the full narrative for Aecon Group breaks down how Aecon Group’s nuclear pipeline could accelerate or compress future profitability.

NexGen Energy (TSX:NXE)

Overview: NexGen Energy is a Vancouver based uranium explorer and developer that owns the Rook I project in Saskatchewan’s Athabasca Basin.

Market Cap: CA$8.5b

NexGen Energy fits this nuclear theme because Rook I is a pure uranium development asset aimed at supplying fuel to future reactors. This structure provides direct exposure to potential uranium supply tightness rather than diversified energy earnings. The appeal rests on how a single high grade project responds if an unseen pressure in the uranium market shifts at a challenging time.

That hidden pressure point is exactly what makes the analysis report for NexGen Energy so useful for spotting where NexGen Energy’s risk and potential might be decoupling.

Denison Mines (TSX:DML)

Overview: Denison Mines is a Toronto based uranium explorer and developer focused on advancing the Wheeler River project to supply nuclear fuel.

Operations: Denison Mines currently generates about CA$4.1 million in revenue from its Mining segment.

Market Cap: CA$3.3b

Denison Mines matters for this nuclear energy screen because its uranium projects are geared toward supplying future reactor fuel rather than broad commodity exposure. This puts the focus on how effectively current development work can translate into long term nuclear fuel supply.

"Denison Mines is expected to progress further in the development of its uranium assets and strengthen its position as a key future supplier of uranium in North America."

What ultimately shapes that opportunity is how one unresolved tension around funding and project timing interacts with the economics of future uranium supply.

That question hangs over every funding decision, and the full narrative for Denison Mines maps how Denison Mines could turn that timing risk into accelerating leverage on future uranium demand.

Seeking Fresh Alternatives Before They Fly

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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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