Constellation Energy Q3 2025 Earnings: Nuclear Fleet Runs Strong Amid Rising Power Demand
Constellation's nuclear plants ran at near-record output in Q3 2025, lifting profit as it prepared to close its Calpine acquisition.
| Q3 2025 | Reported |
|---|---|
| EPS | $2.97 |
| Revenue | $5.70B |
Figures as reported by the company to the SEC for the quarter ended September 30, 2025. Analyst estimates are not part of a filing, so no comparison to expectations is shown.
Key takeaways
- Constellation’s preferred profit measure, adjusted operating earnings (which strips out one-time items), rose to $3.04 per share from $2.74 a year earlier, a gain the company tied to strong performance from its power plants.
- The nuclear fleet — Constellation’s largest source of power — ran at a 96.8% capacity factor, meaning it produced power at nearly full output almost the entire quarter, one of the strongest stretches in company history.
- Over the trailing twelve months, revenue grew about 23% and earnings per share grew about 21% year-over-year, a pace management links to rising electricity demand from data centers and AI computing.
- Profitability stayed healthy: operating margin was near 17% and net profit margin near 13% over the trailing year, meaning the company kept a solid share of each sales dollar as profit even while investing for growth.
- Management narrowed its full-year 2025 guidance for adjusted operating earnings to a range of $9.05 to $9.45 per share.
- The company was finalizing its roughly $16 billion acquisition of power producer Calpine, expected to close in the fourth quarter, which management said would expand available cash and credit to about $14 billion and add a large fleet of natural gas, geothermal, and battery storage plants.
- Constellation continued returning cash to shareholders through a $600 million share buyback program.
- CEO Joe Dominguez pointed to a settlement with Maryland over continued operation of the Conowingo hydroelectric dam and said growing recognition of nuclear power’s role in supporting data centers and grid reliability positions the company for further growth.
Q3 2025 in context
| Metric | Sep 2025 | Sep 2024 | Change |
|---|---|---|---|
| Revenue | $6.6B | $6.5B | +0.3% |
| Net income | $930M | $1.2B | -22.5% |
| Free cash flow | $1.5B | -$664M | +319.6% |
| Diluted EPS | $2.97 | $3.82 | -22.3% |
| Operating margin | 16.5% | 22.4% | -5.9 pts |
| Net margin | 14.2% | 18.3% | -4.2 pts |
Figures for the quarter ended Sep 2025 and the quarter ended Sep 2024, as reported to the SEC.
How the stock took it
Constellation Energy Corp closed at $351.30 on Nov 6, 2025, the last session before the report, and at $360.93 on Nov 10, 2025, the first session after it — +2.7% across the report.
Closes from the market's daily record. Each figure spans the report date — from the last session that closed before it to the first that closed after — because a company may report before the open or after the close.
Sources: company report