## Is Constellation Energy or Cameco the Better Nuclear Stock for the Next Decade?

[Constellation Energy](https://smrintel.com/companies/constellation-energy) targets base earnings-per-share growth of more than 20% annually through 2029 and guides to base EPS of $6.65–$6.75 for 2026. [Cameco Corporation](https://smrintel.com/companies/cameco) enters the same decade trading at approximately 82 times trailing earnings — a valuation that depends almost entirely on uranium price momentum and production execution. Both companies are genuine beneficiaries of the structural shift toward nuclear power, but their risk profiles are starkly different, and investors conflating the two are making a category error.

The macro backdrop is as supportive as it has been in decades. U.S. electricity consumption is projected by the U.S. Energy Information Administration to reach 4,269 billion kilowatt-hours in 2026 and climb to 4,399 billion kilowatt-hours in 2027. The Trump administration's stated goal of quadrupling U.S. nuclear capacity — from roughly 100 gigawatts in 2024 to 400 gigawatts by 2050 — provides the long-range policy signal that both operators and uranium miners need to underwrite decade-long investment decisions. The NRC has proposed licensing process changes to support that buildout.

The question is which stock actually delivers that macro thesis to shareholders over a 10-year horizon.

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## Constellation Energy: Revenue Visibility Is the Core Thesis

Constellation's fundamental investment case rests on two pillars: a dominant fleet of operating nuclear plants and a growing book of long-term power purchase agreements that convert that fleet into predictable cash flow.

As of March 31, the company had secured more than 5,650 megawatts through long-term clean energy agreements. The anchor deals are well-known: a 20-year contract to supply Meta Platforms from the Clinton nuclear plant in Illinois, and a 20-year agreement tied to the planned restart of the Crane Clean Energy Center in Pennsylvania for Microsoft. In June 2026, Constellation added a 176-megawatt nuclear power agreement with Walmart — a meaningful signal that hyperscale and large commercial buyers are still queuing for contracted nuclear output.

The Calpine acquisition expanded Constellation's total generating capacity to approximately 55 gigawatts, adding natural gas and geothermal assets to what had been a nearly pure-play nuclear company. That diversification cuts both ways: it broadens revenue streams but introduces integration risk and acquisition debt that management must service while simultaneously funding the Crane restart.

The PJM capacity market data in the source is telling. In its latest auction, the clearing price hit the temporary cap of $325 per megawatt-day — and PJM estimated it would have reached $554.72 without the cap. The auction still came up 6.8 gigawatts short of PJM's stated reliability requirement. For [baseload power](https://smrintel.com/glossary/baseload) providers like Constellation, scarcity in the capacity market is a direct earnings tailwind.

Management's own 10-year EPS trajectory, as reported in the source: base EPS of $6.65–$6.75 in 2026, growing at more than 20% annually through 2029, then more than 10% annually in each subsequent three-year period. The source calculates that hitting those targets would lift base EPS to roughly $22.56 by 2036. Applying a 70% adjustment factor to arrive at total adjusted EPS produces a figure near $32.23. At 18 times earnings — below the current 21.9x multiple on 2026 guidance — that implies a share price near $580. Against a July 16 closing price of $251.77, that math suggests a roughly 2.3x return over the decade.

**The critical risk the bulls tend to underweight:** No fully closed U.S. nuclear plant has ever completed a successful restart. The Crane Clean Energy Center is not a brownfield refurbishment — it is an unprecedented operational challenge. If the restart slips or fails, it takes with it the Microsoft PPA and a meaningful portion of the growth narrative.

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## Cameco: Uranium Fundamentals vs. a Demanding Valuation

[Cameco](https://smrintel.com/companies/cameco) is structurally different. It is primarily a uranium miner and fuel services provider, not a power generator. Its 49% equity stake in [Westinghouse Electric Company](https://smrintel.com/companies/westinghouse) gives it exposure to reactor services and fuel manufacturing, but uranium price and production volume remain the dominant earnings drivers.

The demand-side visibility is genuine. Cameco exited Q1 with contracts covering average annual uranium deliveries of more than 28 million pounds through 2030, with above-average delivery commitments locked in from 2026 through 2028. The uranium segment's adjusted EBITDA rose 48% year-over-year to C$423 million in Q1, driven by higher sales volumes and improved pricing. Cameco's share of Westinghouse's adjusted EBITDA rose 33% year-over-year to C$122 million in the same period.

The production risk, however, materialized in July in a concrete way. A problem shut down the McClean Lake mill in Saskatchewan — the facility that processes ore from Cameco's Cigar Lake mine — forcing a temporary halt to mining at Cigar Lake. Operations restarted on July 14 and, as of the source's publication, have not affected the company's 2026 production forecast. But the episode illustrates a structural vulnerability: Cameco's output depends not only on its own mines but on third-party processing infrastructure it does not fully control.

The valuation is the most contentious element. At approximately 82 times trailing earnings, Cameco is priced for a prolonged uranium bull market. Analysts cited in the source project 2026 EPS of approximately $1.66. The source's bear-case scenario — 8% annual earnings growth and P/E compression to 20x by 2036 — produces a stock price near $72, below current levels. That is not a fringe scenario; P/E multiples at 82x are almost never sustained for a decade in a commodity business.

The bull case requires either sustained high uranium prices, a significant re-rating of Westinghouse's value, or earnings growth well above the 8% conservative assumption. All three are plausible. None are guaranteed.

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## Industry Implications

The divergence between these two stocks captures a broader dynamic in nuclear investment right now: operator equity (Constellation) offers cleaner earnings visibility tied to contracted megawatts, while upstream fuel equity (Cameco) offers higher leverage to the uranium price cycle but demands a longer tolerance for volatility.

For utility executives and institutional investors building nuclear exposure, the implication is that the Trump administration's 400 GW target creates demand for both — but on different timelines. New reactor capacity needed to hit 400 GW by 2050 requires [uranium enrichment](https://smrintel.com/glossary/enrichment) capacity, conversion services, and fuel fabrication that Cameco and Westinghouse supply. The question is whether Cameco's current valuation already prices in that demand, or whether it prices in something more optimistic still.

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## Key Takeaways

- Constellation Energy guides to base EPS of $6.65–$6.75 in 2026 with more than 20% annual growth targeted through 2029.
- As of March 31, Constellation had secured more than 5,650 MW through long-term clean energy agreements, including 20-year deals with Meta and Microsoft.
- The PJM capacity market cleared at the $325/MW-day cap in its latest auction; PJM estimated the uncapped price would have been $554.72 and still came up 6.8 GW short.
- Constellation's Calpine acquisition expanded total capacity to approximately 55 GW but adds integration and debt risk.
- Cameco's uranium segment adjusted EBITDA rose 48% year-over-year to C$423 million in Q1; its Westinghouse share rose 33% to C$122 million.
- Cameco trades at approximately 82 times trailing earnings — a multiple that is difficult to sustain absent exceptional uranium price or volume upside.
- A Cigar Lake mining halt in July, caused by a third-party mill shutdown, restarted July 14 without affecting 2026 guidance — but exposed a structural supply chain vulnerability.
- The Trump administration's target of 400 GW of nuclear capacity by 2050 (versus roughly 100 GW in 2024) provides the macro policy floor underpinning both stocks.

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## Frequently Asked Questions

**What is Constellation Energy's EPS growth target through 2029?**
Management targets base EPS growth of more than 20% annually from 2026 through 2029, with more than 10% growth in each three-year period after that. The 2026 base EPS guidance midpoint is $6.70.

**How much uranium does Cameco have contracted through 2030?**
As of Q1 2026, Cameco had contracts covering average annual deliveries of more than 28 million pounds of uranium through 2030, with higher-than-average commitments from 2026 through 2028.

**What is the risk with the Crane Clean Energy Center restart?**
No fully closed U.S. nuclear plant has completed a successful restart. The Crane restart, contracted with Microsoft under a 20-year PPA, represents both a significant earnings driver and an execution risk without direct historical precedent.

**Why did Cameco halt mining at Cigar Lake in July 2026?**
A problem at the McClean Lake mill — the third-party facility that processes Cigar Lake's uranium ore — forced a temporary mining halt. Operations restarted on July 14, and as of the source's publication date, the company's 2026 production forecast was unchanged.

**What U.S. electricity demand growth is the EIA projecting?**
The EIA projects U.S. electricity consumption to reach 4,269 billion kilowatt-hours in 2026 and 4,399 billion kilowatt-hours in 2027 — both record levels.

**What is Cameco's stake in Westinghouse?**
Cameco holds a 49% equity stake in Westinghouse Electric Company, which designs and manufactures nuclear fuel and provides maintenance, engineering, and components for reactors globally.