Constellation Energy vs. Ameren: Which Power Stock Has More Upside?

The article evaluates Constellation Energy (CEG) and Ameren (AEE) as attractive utility investments amid surging clean energy demand, particularly for nuclear power, driven by AI data centers and EVs. While CEG leads as the largest U.S. nuclear operator with a 94.8% Q2 2025 capacity factor and 21.61% ROE, Ameren is currently favored due to its superior three-month price performance (5.7% vs. CEG's 1.9%), a significantly higher dividend yield of 2.82%, and a positive 0.20% increase in its 2025 EPS estimate, contrasting with CEG's 0.84% decline.

Analysis

The rising demand for clean electricity, propelled by AI data centers and electrification, has positioned nuclear power generators favorably, presenting a clear investment thesis for both Constellation Energy (CEG) and Ameren (AEE). A comparative analysis reveals a distinct trade-off. Constellation Energy stands out as the U.S. market leader in nuclear generation, demonstrating superior operational efficiency with a nuclear fleet capacity factor of 94.8% and a return on equity (ROE) of 21.61%, more than double Ameren's 10.38%. However, CEG faces near-term headwinds, reflected in a 0.84% decline in its 2025 consensus EPS estimate over the past 60 days. In contrast, Ameren, while less of a nuclear pure-play with one plant contributing 24% of its power, exhibits stronger current investment metrics. AEE's 2025 EPS estimate has increased by 0.20%, it offers a significantly higher dividend yield of 2.82% versus CEG's 0.48%, and its stock has outperformed over the past three months with a 5.7% gain compared to CEG's 1.9%. Furthermore, Ameren's substantial long-term regulated capital expenditure plan of over $63 billion through 2034 signals a stable, long-duration growth trajectory.

Key Decisions for Investors

• Investors face a choice between Constellation Energy's superior operational efficiency and pure-play nuclear leadership, evidenced by its 21.61% ROE, and Ameren's stronger near-term momentum, positive 2025 EPS revisions, and significantly higher 2.82% dividend yield.
• For income-oriented portfolios, Ameren presents a more compelling case due to its substantial dividend yield, whereas investors prioritizing exposure to operational leverage in the nuclear market may prefer Constellation Energy despite its low yield.
• Note the diverging near-term analyst outlooks, as Ameren's upward 2025 EPS revision contrasts with a decline for Constellation, potentially signaling near-term outperformance for AEE.
• Evaluate the differing strategic growth paths, with Ameren's extensive $63 billion regulated investment pipeline offering predictable growth, against Constellation's more direct exposure to the upside from rising clean energy demand for its existing nuclear fleet.