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Constellation Energy Corp

CEGNasdaqElectric ServicesFiscal year ends December 31
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 6, 2026Score 11/302% above fair value
$257.25−5.13 (-1.96%)

Close on Nov 2, 2026Market cap $91.15BP/E 25.1Yield 0.15%

Constellation Energy Operated Nuclear Fleet Capacity Factor by Quarter

Operated Nuclear Fleet Capacity Factor (%) (%)

QuarterlyAnnual

Constellation Energy Operated Nuclear Fleet Capacity Factor: 93.0% in Q2 2026, down 1.8 pts from a year earlier.

Latest, Q2 2026
93.0%
Period ended Jun 30, 2026
Change on a year earlier
-1.8 pts
94.8% in Q2 2025
History
22 quarters
Since Q1 2021
Sources
18
Documents cited below

Where the Q2 2026 figure comes from

“Nuclear Operations: Our nuclear fleet, including our owned output from the Salem and South Texas Project (STP) Generating Stations, produced 44,160 gigawatt-hours (GWhs) in the second quarter of 2026, compared with 45,170 GWhs in the second quarter of 2025. Excluding Salem and STP, our nuclear plants at ownership achieved a 93.0% capacity factor for the second quarter of 2026, compared with 94.8% for the second quarter of 2025. There were 86 planned refueling outage days in the second quarter of 2026 and 41 in the second quarter of 2025 for sites we operate. There were 20 non-refueling outage days in the second quarter of 2026 and 22 in the second quarter of 2025 for sites we operate.”

Source: Constellation Energy 8-K 2Q26 Release (0001868275-26-000097) ↗

Net monthly generation divided by maximum dependable capacity multiplied by hours in the period for Constellation-operated nuclear units (excludes non-operated Salem and STP).

Quarterly history

Hover a value to see the sentence it was read from; calculated values show their formula

PeriodEndedOperated Nuclear Fleet Capacity Factor (%) (%)Year on yearSource
Q2 2026Jun 30, 202693.0%-1.8 ptsConstellation Energy 8-K 2Q26 Release (0001868275-26-000097) ↗
Q1 2026Mar 31, 202692.3%-1.8 ptsConstellation Energy 8-K 1Q26 Release (0001868275-26-000063) ↗
Q4 2025Dec 31, 202593.1%-1.7 ptsConstellation Energy 8-K 4Q25 Release (0001868275-26-000029) ↗
Q3 2025Sep 30, 202596.8%+1.8 ptsConstellation Energy 8-K 3Q25 Release (0001868275-25-000089) ↗
Q2 2025Jun 30, 202594.8%-0.6 ptsConstellation Energy 8-K 2Q26 Release (0001868275-26-000097) ↗
Q1 2025Mar 31, 202594.1%+0.8 ptsConstellation Energy 8-K 1Q26 Release (0001868275-26-000063) ↗
Q4 2024Dec 31, 202494.8%-0.3 ptsConstellation Energy 8-K 4Q25 Release (0001868275-26-000029) ↗
Q3 2024Sep 30, 202495.0%-2.2 ptsConstellation Energy 8-K 3Q25 Release (0001868275-25-000089) ↗
Q2 2024Jun 30, 202495.4%+3.0 ptsConstellation Energy 8-K 2Q25 Release (0001868275-25-000070) ↗
Q1 2024Mar 31, 202493.3%+0.5 ptsConstellation Energy 8-K 1Q25 Release (0001868275-25-000040) ↗
Q4 2023Dec 31, 202395.1%-0.3 ptsConstellation Energy 8-K 4Q24 Release (0001868275-25-000020) ↗
Q3 2023Sep 30, 202397.2%+0.8 ptsConstellation Energy 8-K 3Q24 Release (0001868275-24-000064) ↗
Q2 2023Jun 30, 202392.4%-1.8 ptsConstellation Energy 8-K 2Q24 Release (0001868275-24-000047) ↗
Q1 2023Mar 31, 202392.8%-0.2 ptsConstellation Energy 8-K 1Q24 Release (0001868275-24-000031) ↗
Q4 2022Dec 31, 202295.4%+3.0 ptsConstellation Energy 8-K 4Q23 Release (0001868275-24-000014) ↗
Q3 2022Sep 30, 202296.4%-1.3 ptsConstellation Energy 8-K 3Q23 Release (0001868275-23-000076) ↗

Breakdown

What makes up operated Nuclear Fleet Capacity Factor

Cite this data

StockData. (2026). Constellation Energy Operated Nuclear Fleet Capacity Factor (%), quarterly Q1 2021–Q2 2026 [Data set]. Compiled from Constellation Energy SEC filings and investor materials. https://stockdatahq.com/stocks/ceg/kpis/nuclear-capacity-factor-pct

See every metric in the Constellation Energy KPI table. Data updated Oct 26, 2026.